OBSOLETE PRODUCT - Murata Power Solutions

JZY7015L 15A DC-DC Intelligent POL
OBSOLETE PRODUCT 3V to 13.2V Input • 0.5V to 5.5V Output
Contact Factory for Replacement Model
Applications
• Low voltage, high density systems with
Intermediate Bus Architectures (IBA)
• Point-of-load regulators for high performance DSP,
FPGA, ASIC, and microprocessor applications
• Desktops, servers, and portable computing
• Broadband, networking, optical, and
communications systems
• Active memory bus terminators
Benefits
• Integrates digital power conversion with intelligent
power management
• Eliminates the need for external power
management components
• Completely programmable via industry standard
serial communication bus
• One part that covers all applications
• Reduces board space, system cost and
complexity, and time to market
Features
• Wide input voltage range: 3V – 13.2V
• High continuous output current: 15A
• Active digital current share
• Single-wire serial communication bus for frequency
synchronization, programming, and monitoring
• Wide programmable output voltage range: 0.5V to
5.5V
• Optimal voltage positioning with programmable slope
of the VI line
• Overcurrent, overvoltage, undervoltage, and
overtemperature protections with programmable
thresholds and types
• Programmable fixed switching frequency 0.5-1.0MHz
• Programmable turn-on and turn-off delays
• Programmable turn-on and turn-off voltage slew rates
with tracking protection
• Programmable feedback loop compensation
• Power Good signal with programmable limits
• Programmable fault management
• Start up into the load pre-biased up to 100%
• Full rated current sink
• Real time voltage, current, and temperature
measurements, monitoring, and reporting
• Small footprint SMT package: 16x32mm
• Low profile of 8mm
• Compatible with conventional pick-and-place
equipment
• Wide operating temperature range
• UL60950 recognized, CSA C22.2 No. 60950-00
certified, and TUV EN60950-1:2001 certified
Description
The JZY7015L is an intelligent, fully programmable step-down point-of-load DC-DC module integrating digital
power conversion and intelligent power management. When used with JZM7100 Series Digital Power Managers,
the JZY7015L completely eliminates the need for external components for sequencing, tracking, protection,
monitoring, and reporting. All parameters of the JZY7015L are programmable via the serial communication bus
and can be changed by a user at any time during product development and service.
Selection Chart
Model
Input Voltage
Range (VDC)
Output Voltage
Range (VDC)
Output Voltage Setpoint Accuracy
(%VOUT or mV, whichever is greater)
Output Current
(ADC)
JZY7015L
3.0 – 13.2
0.5 – 5.5
1% or 20mV
15
1.
•
•
Reference Documents:
JZM7100 Digital Power Manager. Data Sheet
Digital Power Manager. Programming Manual
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Page 1 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
ZIOSTM Graphical User Interface
•
2.
•
Ordering Information
JZY7117L
3.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect longterm reliability, and cause permanent damage to the converter.
4.
Parameter
Conditions/Description
Min
Max
Units
Operating Temperature
Controller case temperature
-40
105
°C
Input Voltage
250ms Transient
15
VDC
Output Current
(See Output Current Derating Curves)
15
ADC
-15
Environmental and Mechanical Specifications
Parameter
Conditions/Description
Min
Nom
Units
Ambient Temperature Range
-40
85
°C
Storage Temperature (Ts)
-55
125
°C
8
grams
Weight
MTBF
1)
Max
Calculated Per Telcordia Technologies SR-332
4.82
DC-DC Front End suffix: HBC for HBC25ZH-NT; QBC for QBC11ZH-NT; HDS for HDS48T30120-NCAR; QHS for QHS25ZG-NT
REV. CD1.0 JUNE 17, 2005
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Page 2 of 34
MHrs
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
5.
Electrical Specifications
Specifications apply at the input voltage from 3V to 13.2V, output load from 0 to 15A, ambient temperature from -40°C to 85°C,
100μF output capacitance, and default performance parameters settings unless otherwise noted.
5.1
5.2
Input Specifications
Parameter
Conditions/Description
Min
Nom
Input voltage (VIN)
At VIN<4.75V, VLDO pin needs to be
connected to an external voltage source
higher than 4.75V
3
Input Current (at no load)
VIN≥4.75V, VLDO pin connected to VIN
50
mADC
Undervoltage Lockout (VLDO
connected to VIN)
Ramping Up
Ramping Down
4.2
3.75
VDC
VDC
Undervoltage Lockout (VLDO
connected to VAUX=5V)
Ramping Up
Ramping Down
3.0
2.5
VDC
VDC
External Low Voltage Supply
Connect to VLDO pin when VIN<4.75V
VLDO Input Current
Current drawn from the external low
voltage supply at VLDO=5V
4.75
Max
Units
13.2
VDC
13.2
50
VDC
mADC
Output Specifications
Parameter
Conditions/Description
Min
Programmable1
Default (no programming)
VIN=12V, IOUT=0.5*IOUT MAX,
FSW=500kHz, room temperature
0.5
Output Current (IOUT)
VIN MIN to VIN MAX
-152
Line Regulation
VIN MIN to VIN MAX
±0.3
%VOUT
Load Regulation
0 to IOUT MAX
±0.3
%VOUT
Dynamic Regulation
Peak Deviation
Settling Time
Slew rate 2.5A/μs, 50 -100% load step
COUT=330μF, FSW=1MHz
to 10% of peak deviation
VIN=5.0V, VOUT=0.5V
VIN=5.0V, VOUT=2.5V
VIN=13.2V, VOUT=0.5V
VIN=13.2V, VOUT=2.5V
VIN=13.2V, VOUT=5.0V
100
50
mV
μs
10
15
15
25
35
mV
mV
mV
mV
mV
20
ppm/°C
Output Voltage Range (VOUT)
Output Voltage Setpoint Accuracy
Output Voltage Peak-to-Peak
Ripple and Noise
BW=20MHz
Full Load
Nom
Max
Units
5.5
VDC
VDC
0.5
(See Selection Chart)
15
ADC
Temperature Coefficient
VIN=12V, IOUT=0.5*IOUT MAX
Switching Frequency
Default
Programmable, 250kHz steps
500
1,000
kHz
kHz
Duty Cycle Limit
Programmable, 1.56% steps
1.56
100
%
500
1
JZY7015L is a step-down converter, thus the output voltage is always lower than the input voltage as show in
Figure 1.
2
At the negative output current (bus terminator mode) efficiency of the JZY7015L degrades resulting in increased
internal power dissipation. Therefore maximum allowable negative current under specific conditions is 20% lower
than the current determined from the derating curves shown in paragraph 6.5.
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JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
VOUT
[V]
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
Min Load 0.2A
0.5
VIN [V]
2.0
4.0
3.0 3.15
6.0
5.5
8.0
10.0
12.0
14.0
13.2
6.25
Figure 1. Output Voltage as a Function of Input Voltage and Output Current
5.3
Protection Specifications
Parameter
Conditions/Description
Min
Nom
Max
Units
Output Overcurrent Protection
Type
Threshold
Default
Programmable
Default
Programmable in 11 steps
Threshold Accuracy
60
Non-Latching, 130ms period
Latching/Non-Latching
160
%IOUT
160
%IOUT
-20
20
%IOCP.SET
Output Overvoltage Protection
Type
Threshold
Default
Programmable
Default
Programmable in 10% steps
Threshold Accuracy
Delay
REV. CD1.0 JUNE 17, 2005
1101
Non-Latching, 130ms period
Latching/Non-Latching
130
%VO.SET
130
%VO.SET
-2
From instant when threshold is exceeded until
the turn-off command is generated
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2
6
Page 4 of 34
%VOVP.SET
μs
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
Output Undervoltage Protection
Default
Programmable
Default
Programmable in 5% steps
Type
Threshold
Threshold Accuracy
Delay
75
Non-Latching, 130ms period
Latching/Non-Latching
75
%VO.SET
85
%VO.SET
-2
2
From instant when threshold is exceeded until
the turn-off command is generated
%VUVP.SET
6
μs
Overtemperature Protection
Type
Default
Programmable
Non-Latching, 130ms period
Latching/Non-Latching
Turn Off Threshold
Temperature is increasing
130
°C
Turn On Threshold
Temperature is decreasing after module was
shut down by OTP
120
°C
Threshold Accuracy
Delay
-5
5
From instant when threshold is exceeded until
the turn-off command is generated
6
°C
μs
Tracking Protection (when Enabled)
Type
Default
Programmable
Disabled
Latching/Non-Latching, 130ms period
Threshold
Enabled during output voltage ramping up
Threshold Accuracy
Delay
-50
From instant when threshold is exceeded until
the turn-off command is generated
±250
mVDC
50
mVDC
6
μs
Overtemperature Warning
Reporting
Status Register, PT Bit (Bit 7)
Threshold Accuracy
-5
Hysteresis
Delay
From instant when threshold is exceeded until
the warning signal is generated
5
°C
3
°C
6
μs
Power Good Signal
Reporting
Status Register, PG Bit (Bit 6), and PGOOD pin
VOUT is inside the PG window
VOUT is outside the PG window
Default
Programmable in 5% steps
Logic
Lower Threshold
PG Bit=1, PGOOD is High
PG Bit=0, PGOOD is Low
90
90
95
%VO.SET
%VO.SET
110
%VO.SET
12
μs
Upper Threshold
Delay
From instant when threshold is exceeded until
status of PG signal changes
Threshold Accuracy
-2
2
___________________
1
Minimum OVP threshold is 1.0V
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Page 5 of 34
N/A
%VO.SET
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
5.4
Feature Specifications
Parameter
Conditions/Description
Min
Nom
Max
Units
Current Share
Type
Maximum Number of Modules
Connected in Parallel
Maximum Number of Modules
Connected in Parallel
Current Share Accuracy
Active, Single Line
IOUT MIN≥20%*IOUT NOM
10
IOUT MIN=0
4
IOUT MIN≥20%*IOUT NOM
±20
%IOUT
0
348.75
degree
Interleave
Interleave (Phase Shift)
Programmable in 11.25° steps
Sequencing
Turn ON Delay
Programmable in 1ms steps
0
255
ms
Turn OFF Delay
Programmable in 1ms steps
0
63
ms
0.1
8.331
V/ms
-0.1
1
-8.33
V/ms
0
6.7
mV/A
Programmable
0.05
50
kHz
Programmable
0.05
50
kHz
Programmable
0.05
50
kHz
Programmable
1
1,000
kHz
Programmable
1
1,000
kHz
1 LSB=22mV
-2%VOUT
– 1 LSB
2%VOUT
+ 1 LSB
mV
20%*IOUT NOM < IOUT < IOUT NOM
-10
+10
%IOUT
Junction temperature of POL controller
-5
+5
°C
Tracking
Turn ON Slew Rate
Turn OFF Slew Rate
Programmable in 7 steps
Programmable in 7 steps
Optimal Voltage Positioning
Load Regulation
Programmable in 8 steps
Feedback Loop Compensation
Zero1 (Effects phase lead and
increases gain in mid-band)
Zero 2 (Effects phase lead and
increases gain in mid-band)
Pole 1 (Integrator Pole, effects
loop gain)
Pole 2 (Effects phase lag and
limits gain in mid-band)
Pole 3 (High frequency lowpass filter to limit PWM noise)
Monitoring
Output Voltage Monitoring
Accuracy
Output Current Monitoring
Accuracy
Temperature Monitoring
Accuracy
Remote Voltage Sense
Type
Differential
Voltage Drop Compensation
±300
___________________
1
Achieving fast slew rates under specific line and load conditions may require feedback loop adjustment
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mV
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
5.5
Signal Specifications
Parameter
Conditions/Description
Min
Nom
Max
Units
VDD
Internal supply voltage
3.15
3.3
3.45
V
SYNC/DATA Line
ViL_sd
LOW level input voltage
-0.5
0.3 x VDD
V
ViH_sd
HIGH level input voltage
0.75 x
VDD
VDD + 0.5
V
Vhyst_sd
Hysteresis of input Schmitt trigger
VoL
LOW level sink current @ 0.5V
Tr_sd
Maximum allowed rise time 10/90%VDD
Cnode_sd
Added node capacitance
5
Ipu_sd
Pull-up current source at Vsd=0V
0.5
Freq_sd
Clock frequency of external SD line
0.35 x
VDD
V
14
mA
475
300
ns
10
pF
mA
525
Tsynq
Sync pulse duration
22
28
T0
Data=0 pulse duration
72
78
kHz
% of clock
cycle
% of clock
cycle
Inputs: ADDR0…ADDR4, Enable, IM, VID0…VID4
ViL_x
LOW level input voltage
-0.5
0.3 x VDD
V
ViH_x
HIGH level input voltage
0.7 x VDD
VDD+0.5
V
Vhyst_x
Hysteresis of input Schmitt trigger
RdnL_ADDR
External pull down resistance
ADDRX forced low
0.1 x VDD
V
10
kOhm
Power Good and OK Inputs/Outputs
Iup_PG
Pull-up current source input forced low PG
60
μA
Iup_OK
Pull-up current source input forced low OK
400
μA
ViL_x
LOW level input voltage
-0.5
0.3 x VDD
V
ViH_x
HIGH level input voltage
0.7 x VDD
VDD+0.5
V
Vhyst_x
Hysteresis of input Schmitt trigger
IoL
LOW level sink current at 0.5V
0.1 x VDD
V
10
mA
Current Share Bus
Iup_CS
Pull-up current source at VCS = 0V
ViL_CS
LOW level input voltage
-0.5
0.3 x VDD
V
ViH_CS
HIGH level input voltage
0.75 x
VDD
VDD+0.5
V
Vhyst_CS
Hysteresis of input Schmitt trigger
IoL
LOW level sink current at 0.5V
Tr_CS
Maximum allowed rise time 10/90% VDD
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1.5
mA
0.35 x
VDD
V
15
mA
100
Page 7 of 34
ns
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
6.
Typical Performance Characteristics
6.1
95
Efficiency Curves
95
90
85
Efficiency, %
Efficiency, %
90
85
80
75
70
80
65
Vout=1.2V
Vout=3.3V
75
Vout=0.5V
Vout=1.2V
60
Vout=2.5V
0
1.5
3
4.5
7.5
9
10.5
12
13.5
15
Output Current, A
70
0.0
1.5
3.0
4.5
6.0
7.5
9.0
10.5
12.0
13.5
15.0
Output Current, A
Figure 4. Efficiency vs. Load. Vin=12V, Fsw=500kHz
95
95
90
90
85
Efficiency, %
Figure 2. Efficiency vs. Load. Vin=3.3V, Fsw=500kHz
85
Efficiency, %
6
Vout=2.5V
Vout=5.0V
80
80
75
75
70
70
65
65
60
Vin=3.3V
Vout=0.5V
Vout=2.5V
60
0.0
1.5
3.0
4.5
6.0
7.5
Vout=1.2V
Vout=3.3V
9.0
10.5 12.0
0.5
1.0
1.5
2.0
Vin=5.0V
2.5
3.0
4.0
4.5
5.0
Output Voltage, V
13.5 15.0
Output Current, A
Figure 5. Efficiency vs. Output Voltage, Iout=15A,
Fsw=500kHz
Figure 3. Efficiency vs. Load. Vin=5V, Fsw=500kHz
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3.5
Vin=12V
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Page 8 of 34
5.5
JZY7015L 15A DC-DC Intelligent POL
95
88
90
86
85
84
Efficiency, %
Efficiency, %
3V to 13.2V Input • 0.5V to 5.5V Output
80
75
82
80
78
70
76
65
Vout=0.5V
Vout=1.2V
Vout=2.5V
Fsw=500kHz
Fsw=1,000kHz
Vout=3.3V
74
60
3
4
5
6
7
8
Input Voltage, V
9
10
11
0.0
12
1.5
3.0
4.5
6.0
7.5
9.0
Output Current, A
Fsw=750kHz
10.5
12.0 13.5
15.0
Figure 8. Efficiency vs. Load. Vin=5V, Vout=1.2V
Figure 6. Efficiency vs. Input Voltage. Iout=15A, Fsw=500kHz
95
93
94
91
89
Efficiency, %
Efficiency, %
93
92
91
87
85
90
89
83
Fsw=500kHz
Fsw=750kHz
Fsw=1,000kHz
Fs=500kHz
88
0.0
1.5
3.0
4.5
6.0
7.5
9.0
10.5 12.0
13.5
15.0
Output Current, A
Figure 7. Efficiency vs. Load. Vin=3.3V, Vout=2.5V
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Fs=750kHz
Fs=1,000kHz
81
0
1.5
3
4.5
6
7.5
9
10.5
Output Current, A
12
13.5
Figure 9. Efficiency vs. Load. Vin=12V, Vout=5V
Page 9 of 34
15
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
93
92
91
90
Efficiency, %
89
88
87
Vin=3.3V, Vout=2.5V
86
Vin=5V, Vout=1.2V
85
Vin=12V, Vout=5V
84
83
82
81
80
500
750
1000
Switching Frequency, kHz
Figure 10. Efficiency vs. Switching Frequency. Iout=15A
6.2
Figure 12. Turn-On with Different Rising Slew Rates.
Rising Slew Rates are Programmed as follows: V11V/ms, V2-0.5V/ms, V3-0.2V/ms.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
Turn-On Characteristics
Figure 13. Sequenced Turn-On. Rising Slew Rate is
Programmed at 1V/ms. V2 Delay is 2ms, V3 delay
is 4ms. Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
Figure 11. Tracking Turn-On. Rising Slew Rate is
Programmed at 0.5V/ms.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
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JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
6.3
Figure 14. Turn On with Sequencing and Tracking. Rising
Slew Rate Programmed at 0.2V/ms, V1 and V3
delays are programmed at 20ms.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
Figure 15. Turn On into Prebiased Load. Same as Figure 14,
with a Diode Between V2 and V3. V3 is Prebiased
by V2 via the Diode.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
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Turn-Off Characteristics
Figure 16. Tracking Turn-Off. Falling Slew Rate is
Programmed at 0.5V/ms.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
Figure 17. Turn-Off with Tracking and Sequencing. Falling
Slew Rate is Programmed at 0.5V/ms.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
Page 11 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
6.4
Transient Response
The pictures below show the deviation of the output
voltage in response to the 50-100-50% step load at
2.5A/μs. In all tests the JZY7015L converters were
switching at 1MHz and had 6x47μF ceramic
capacitors connected across the output pins.
Bandwidth of the feedback loop was programmed for
faster transient response.
Figure 20. Vin=5V, Vout=2.5V, BW~40kHz
Figure 18. Vin=12V, Vout=5V, BW~40kHz.
Figure 21. Vin=5V, Vout=1V, BW~40kHz
Figure 19. Vin=12V, Vout=1V, BW~40kHz
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JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
Figure 22. Vin=3.3V, Vout=1V, BW~30kHz
6.5
Thermal Derating Curves
15
Output Current, A
14
13
12
11
10
9
0 LFM
100 LFM
200 LFM
400 LFM
600 LFM
8
45
50
55
60
65
70
75
Temperature 'C
Figure 23. Thermal Derating Curves. Vin=13.2V, Vout=5.0V, Fsw=500kHz
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Page 13 of 34
80
85
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
15
Output Current, A
14
13
12
11
10
9
0 LFM
100 LFM
200 LFM
400 LFM
600 LFM
8
45
50
55
60
65
70
75
80
85
Temperature 'C
Figure 24. Thermal Derating Curves. Vin=13.2V, Vout=5.0V, Fsw=1MHz
7.
Typical Application
Intermediate Voltage Bus
I2C
DPM
SD
OK_C
OK_B
OK_A
CS
ZY7015L
ZY7015L
ADDR
ADDR
V1
ZY7015L
ZY7015L
ADDR
ADDR
V2
V3
2
Figure 25. Block Diagram of Typical Multiple Output Application with Digital Power Manager and I C Interface
The block diagram of a typical application of JZY7015L point-of-load converters (POL) is shown in Figure 25. The
system includes multiple POLs and a JZM7100 Series Digital Power Manager (DPM). All POLs are connected to
the DPM and to each other via a single-wire SD (sync/data) communication bus. The bus provides
synchronization of all POLs to the master clock generated by the DPM and simultaneously performs bidirectional
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Page 14 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
data transfer between POLs and the DPM. Each POL has a unique 5-bit address programmed by grounding
respective address pins. To enable the current share, CS pins of POLs connected in parallel are linked together.
There are three groups of POLs in the application, groups A, B, and group C. A group is defined as a number of
POLs interconnected via OK pins. Grouping of POLs enables users to program, control, and monitor multiple
POLs simultaneously and execute advanced fault management schemes.
The complete schematic of the application is shown in Figure 26.
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JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
Figure 26. Complete Schematic of Application Shown in Figure 25. Intermediate Bus Voltage is from 4.75V to 13.2V.
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Page 16 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
8.
Pin Assignments and Description
Pin
Name
Pin
No.
Pin
Type
VLDO
1
P
IM
Buffer
Type
Pin Description
Notes
Low Voltage Dropout
Connect to an external voltage source higher
than 4.75V, if VIN<4.75V.
Connect to VIN, if VIN≥4.75V
2
Not Used
Leave floating
VID5
3
Not Used
Leave floating
VID4
4
Not Used
Leave floating
VID3
5
Not Used
Leave floating
VID2
6
Not Used
Leave floating
VID1
7
Not Used
Leave floating
VID0
8
Not Used
Leave floating
VREF
9
Not Used
Leave floating
EN
10
Not Used
Connect to PGND
OK
11
I/O
PU
Fault/Status Condition
Connect to OK pin of other Z-POL and/or
DPM. Leave floating, if not used
SD
12
I/O
PU
Sync/Data Line
Connect to SD pin of DPM
PGOOD
13
I/O
PU
Power Good
TRIM
14
Not Used
Leave floating
CS
15
I/O
PU
Current Share
Connect to CS pin of other Z-POLs connected
in parallel
ADDR4
16
I
PU
POL Address Bit 4
Tie to PGND for 0 or leave floating for 1
ADDR3
17
I
PU
POL Address Bit 3
Tie to PGND for 0 or leave floating for 1
ADDR2
18
I
PU
POL Address Bit 2
Tie to PGND for 0 or leave floating for 1
ADDR1
19
I
PU
POL Address Bit 1
Tie to PGND for 0 or leave floating for 1
ADDR0
20
I
PU
POL Address Bit 0
Tie to PGND for 0 or leave floating for 1
-VS
21
I
PU
Negative Voltage Sense
Connect to the negative point close to the load
+VS
22
I
PU
Positive Voltage Sense
Connect to the positive point close to the load
VOUT
23
P
Output Voltage
PGND
24
P
Power Ground
VIN
25
P
Input Voltage
Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up
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Page 17 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
9.
Programmable Features
Performance parameters of JZY7015L POL
converters can be programmed via the industry
standard I2C communication bus without replacing
any components or rewiring PCB traces. Each
parameter has a default value stored in the volatile
memory registers detailed in Table 1. The setup
registers 00h through 14h are programmed at the
system power-up. When the user programs new
performance parameters, the values in the registers
are overwritten. Upon removal of the input voltage,
the default values are restored.
Table 1. JZY7015L Memory Registers
Register
PC1
PC2
PC3
DON
DOF
TC
INT
RUN
ST
VOS
CLS
DCL
B1
B2
B3
C0L
C0H
C1L
C1H
C2L
C2H
C3L
C3H
VOM
IOM
TMP
Content
Protection Configuration 1
Protection Configuration 2
Protection Configuration 3
Turn-On Delay
Turn-Off Delay
Tracking Configuration
Interleave Configuration and
Frequency Selection
RUN Register
Status Register
Output Voltage Setpoint
Current Limit Setpoint
Duty Cycle Limit
Dig Controller Denominator z-1
Coefficient
Dig Controller Denominator z-2
Coefficient
Dig Controller Denominator z-3
Coefficient
Dig Controller Numerator z0
Coefficient, Low Byte
Dig Controller Numerator z0
Coefficient, High Byte
Dig Controller Numerator z-1
Coefficient, Low Byte
Dig Controller Numerator z-1
Coefficient, High Byte
Dig Controller Numerator z-2
Coefficient, Low Byte
Dig Controller Numerator z-2
Coefficient, High Byte
Dig Controller Numerator z-3
Coefficient, High Byte
Dig Controller Numerator z-3
Coefficient, Low Byte
Output Voltage Monitoring
Output Current Monitoring
Temperature Monitoring
Address
00h
01h
02h
05h
06h
03h
04h
JZY7015L converters can be programmed using the
ZIOSTM Graphical User Interface or directly via the
I2C bus by using high and low level commands as
described in the ‘”DPM Programming Manual”.
JZY7015L parameters can be reprogrammed at any
time during the system operation and service except
for the digital filter coefficients, the switching
frequency and the duty cycle limit, that can only be
changed when the POL is turned off.
9.1
Output Voltage
The output voltage can be programmed in the GUI
Output Configuration window shown in the Figure 27
or directly via the I2C bus by writing into the VOS
register shown in Figure 28.
15h
16h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
Figure 27. Output Configuration Window
0Fh
10h
11h
12h
13h
14h
17h
18h
19h
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
VOS7
VOS6
VOS5
VOS4
VOS3
VOS2
VOS1
VOS0
Bit 7
Bit 0
Bit 7:0 VOS[7:0], Output voltage setting
00h: corresponds to 0.5000V
01h: corresponds to 0.5125V
…
77h: corresponds to 1.9875V
78h: corresponds to 2.0000V
79h: corresponds to 2.025V
…
F9h: corresponds to 5.225V
FAh: corresponds to 5.250V
FBh: corresponds to 5.300V
…
FFh: corresponds to 5.500V
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Figure 28. Output Voltage Setpoint Register VOS
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Page 18 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
9.1.1
Output Voltage Setpoint
The output voltage programming range is from 0.5V
to 5.5V. Within this range, there are 256 predefined
voltage setpoints. To improve resolution of the
output voltage settings, the voltage range is divided
into three sub-ranges as shown in Table 2.
Table 2. Output Voltage Adjustment Resolution
VOUT MIN, V
VOUT MAX, V
Resolution, mV
0.500
2.000
12.5
2.025
5.25
25
5.3
5.5
50
9.1.2
Output Voltage Margining
If the output voltage needs to be varied by a certain
percentage, the margining function can be utilized.
The margining can be programmed in the GUI
Output Configuration window or directly via the I2C
bus using high level commands as described in the
‘”DPM Programming Manual”.
In order to properly margin POLs that are connected
in parallel, the POLs must be members of one of the
Parallel Buses.
Refer to the GUI System
Configuration Window shown in Figure 55.
9.1.3
Optimal Voltage Positioning
Optimal voltage positioning increases the voltage
regulation window by properly positioning the output
voltage setpoint. Positioning is determined by the
load regulation that can be programmed in the GUI
Output Configuration window or directly via the I2C
bus by writing into the CLS register shown in Figure
38.
Figure 29 illustrates optimal voltage positioning
concept. If no load regulation is programmed, the
headroom (voltage differential between the output
voltage setpoint and a regulation limit) is
approximately half of the voltage regulation window.
When load regulation is programmed, the output
voltage will decrease as the output current
increases, so the VI characteristic will have a
negative slope. Therefore, by properly selecting the
operating point, it is possible to increase the
headroom as shown in the picture.
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VOUT
Upper Regulation
Limit
Lower Regulation
Limit
Operating
Point
VI Curve Without
Load Regulation
VI Curve With
Load Regulation
Headroom without
Load Regulation
Headroom with
Load Regulation
Light
Load
IOUT
Heavy
Load
Figure 29. Optimal Voltage Positioning Concept
Increased headroom allows tolerating larger voltage
deviations. For example, the step load change from
light to heavy load will cause the output voltage to
drop. If the optimal voltage positioning is utilized, the
output voltage will stay within the regulation window.
Otherwise, the output voltage will drop below the
lower regulation limit. To compensate for the voltage
drop external output capacitance will need to be
added, thus increasing cost and complexity of the
system.
The effect of optimal voltage positioning is shown in
Figure 30 and Figure 31. In this case, switching
output load causes large peak-to-peak deviation of
the output voltage. By programming load regulation,
the peak to peak deviation is dramatically reduced.
Figure 30. Transient Response Without Optimal Voltage
Positioning
Page 19 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
DON7
DON6
DON5
DON4
DON3
DON2
DON1
DON0
Bit 7
Bit 0
Bit 7:0 DON[7:0]: Turn-on delay time
00h: corresponds to 0ms delay after turn-on command has occurred
…
FFh: corresponds to 255ms delay after turn-on command has occurred
Figure 33. Turn-On Delay Register DON
9.2.2
Turn-Off Delay
U
U
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
---
---
DOF5
DOF4
DOF3
DOF2
DOF1
DOF0
Bit 7
Bit 0
Bit 7:6 Unimplemented, read as ‘0’
Figure 31. Transient Response With Optimal Voltage
Positioning
9.2
Bit 5:0 DOF[5:0]: Turn-off delay time
00h: corresponds to 0ms delay after turn-off command has occurred
…
3Fh: corresponds to 63ms delay after turn-off command has occurred
Figure 34. Turn-Off Delay Register DOF
Sequencing and Tracking
Turn-on delay, turn-off delay, and rising and falling
output voltage slew rates can be programmed in the
GUI Sequencing/Tracking window shown in Figure
32 or directly via the I2C bus by writing into the DON,
DOF, and TC registers, respectively. The registers
are shown in Figure 33, Figure 34, and Figure 36.
Turn-off delay is defined as an interval from the
application of the Turn-Off command until the output
voltage reaches zero (if the falling slew rate is
programmed) or until both high side and low side
switches are turned off (if the slew rate is not
programmed). Therefore, for the slew rate controlled
turn-off the ramp-down time is included in the turn-off
delay as shown in Figure 35.
User programmed turn-off delay, TDF
Turn-Off
Command
Internal
ramp-down
command
Calculated
delay TD
Ramp-down time, TF
VOUT
Falling slew
rate dVF/dT
Figure 32. Sequencing/Tracking Window
9.2.1
Turn-On Delay
Turn-on delay is defined as an interval from the
application of the Turn-On command until the output
voltage starts ramping up.
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Time
Figure 35. Relationship between Turn-Off Delay and Falling
Slew Rate
As it can be seen from the figure, the internally
calculated delay TD is determined by the equation
below.
V
TD = TDF − OUT ,
dVF
dT
For proper operation TD shall be greater than zero.
The appropriate value of the turn-off delay needs to
be programmed to satisfy the condition.
Page 20 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
If the falling slew rate control is not utilized, the turnoff delay only determines an interval from the
application of the Turn-Off command until both high
side and low side switches are turned off. In this
case, the output voltage ramp-down process is
determined by load parameters.
9.2.3
Rising and Falling Slew Rates
The output voltage tracking is accomplished by
programming the rising and falling slew rates of the
output voltage. To achieve programmed slew rates,
the output voltage is being changed in 12.5mV steps
where duration of each step determines the slew
rate. For example, ramping up a 1.0V output with a
slew rate of 0.5V/ms will require 80 steps duration of
25μs each.
Duration of each voltage step is calculated by
dividing the master clock frequency generated by the
DPM.
Since all POLs in the system are
synchronized to the master clock, the matching of
voltage slew rates of different outputs is very
accurate as it can be seen in Figure 11 and Figure
16.
During the turn on process, a POL not only delivers
current required by the load (ILOAD), but also charges
the load capacitance. The charging current can be
determined from the equation below:
ICHG = CLOAD × dVR
dt
Where, CLOAD is load capacitance, dVR/dt is rising
voltage slew rate, and ICHG is charging current.
When selecting the rising slew rate, a user needs to
ensure that
I LOAD + ICHG < IOCP
Where IOCP is the overcurrent protection threshold of
the JZY7015L. If the condition is not met, then the
overcurrent protection will be triggered during the
turn-on process. To avoid this, dVR/dt and the
overcurrent protection threshold should be
programmed to meet the condition above.
U
R/W-0
R/W-0
R/W-0
R/W-1
R/W-0
R/W-0
---
R2
R1
R0
SC
F2
F1
Bit 7
Bit 7
F0
Bit 0
Unimplemented , read as ‘0’
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Bit 6:4 R[2:0]: Value of Vo rising slope
0: corresponds to 0.1V/ms
1: corresponds to 0.2V/ms
2: corresponds to 0.5V/ms
3: corresponds to 1.0V/ms
4: corresponds to 2.0V/ms
5: corresponds to 5.0V/ms
6: corresponds to 8.33V/ms
7: corresponds to 8.33V/ms
Bit 3
R/W-0
SC, Slew rate control at turn-off
0: Slew rate control turned off
1: Slew rate control turned on
Bit 2:0 F[2:0]: Value of Vo falling slope
0: corresponds to -0.1V/ms
1: corresponds to -0.2V/ms
2: corresponds to -0.5V/ms
3: corresponds to -1.0V/ms
4: corresponds to -2.0V/ms
5: corresponds to -5.0V/ms
6: corresponds to –8.33V/ms
7: corresponds to –8.33V/ms
Figure 36. Tracking Configuration Register TC
9.3
Protections
JZY7015L Series converters have a comprehensive
set of programmable protections. The set includes
the output over- and undervoltage protections,
overcurrent protection, overtemperature protection,
tracking protection, overtemperature warning, and
Power Good signal. Status of protections is stored in
the ST register shown in Figure 37.
R-1
R-0
R-1
R-1
R-1
R-1
R-1
PT
PG
TR
OT
OC
UV
OV
Bit 7
R-1
PV
Bit 0
Bit 7
PT: Temperature Warning
Bit 6
PG: Power Good Warning
Bit 5
TR: Tracking Fault
Bit 4
OT: Temperature Fault
Bit 3
OC: Over Current Fault
Bit 2
UV: Under Voltage Fault
Bit 1
OV: Over Voltage Error (Fatal)
Bit 0
PV: Phase Voltage Error (Fatal)
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Note:
- A warning/fault/error shall be encoded as ‘0’
Figure 37. Protection Status Register ST
Thresholds of overcurrent, over- and undervoltage
protections, and Power Good limits can be
programmed in the GUI Output Configuration
window or directly via the I2C bus by writing into the
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Page 21 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
CLS and PC2 registers shown in Figure 38 and
Figure 39.
R/W-0
R/W-0
R/W-0
R/W-1
R/W-1
R/W-0
R/W-1
R/W-1
LR2
LR1
LR0
TCE
CLS3
CLS2
CLS1
CLS0
Bit 7
Bit 0
Bit 7:5 LR[2:0], Load regulation configuration
000: 0 V/A/Ohm
001: 0.39 V/A/Ohm
010: 0.78 V/A/Ohm
011: 1.18 V/A/Ohm
100: 1.57 V/A/Ohm
101: 1.96 V/A/Ohm
110: 2.35 V/A/Ohm
111: 2.75 V/A/Ohm
Bit 4
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
TCE, Temperature compensation enable
0: disabled
1: enabled
Bit 3:0 CLS[3:0], Current limit setting
0h: corresponds to 37%
1h: corresponds to 47%
…
Bh: corresponds to 140%
Values higher than Bh are translated to Bh (140%)
Figure 40. Fault Management Window
Figure 38. Current Limit Setpoint Register CLS
R/W-0
R/W-1
R/W-0
R/W-0
R/W-0
R/W-0
R/W-1
TRE
PVE
TRP
OTP
OCP
UVP
OVP
R/W-1
Bit 7
U
U
U
R/W-0
R/W-1
R/W-0
R/W-0
R/W-0
---
---
---
PGLL
OVPL1
OVPL0
UVPL1
UVPL0
Bit 7
Bit 7:5 Unimplemented, read as ‘0’
PGLL: Set Power Good Low Level
Bit 4
1 = 95% of Vo
0 = 90% of Vo (Default)
Bit 3:2 OVPL[1:0]: Set Over Voltage Protection
Level
00 = 110% of Vo
01 = 120% of Vo
10 = 130% of Vo (Default)
11 = 130% of Vo
Bit 0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Bit 1:0 UVPL[1:0]: Set Under Voltage Protection Level
00 = 75% of Vo (Default)
01 = 80% of Vo
10 = 85% of Vo
Figure 39. Protection Configuration Register PC2
Note that the overvoltage and undervoltage
protection thresholds and Power Good limits are
defined as percentages of the output voltage.
Therefore, the absolute levels of the thresholds
change when the output voltage setpoint is changed
either by output voltage adjustment or by margining.
In addition, a user can change type of protections
(latching or non-latching) or disable certain
protections. These settings are programmed in the
GUI Fault Management window shown in Figure 40
or directly via the I2C by writing into the PC1 register
shown in Figure 41.
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PVP
Bit 0
Bit 7
TRE: Tracking fault enable
1 = enabled
0 = disabled
Bit 6
PVE: Phase voltage error enable
1 = enabled
0 = disabled
Bit 5
TRC: Tracking fault protection
1 = latching
0 = non latching
Bit 4
OTC: Over temperature protection configuration
1 = latching
0 = non latching
Bit 3
OCC: Over current protection configuration
1 = latching
0 = non latching
Bit 2
UVC: Under voltage protection configuration
1 = latching
0 = non latching
Bit 1
OVPC: Over voltage protection configuration
1 = latching
0 = non latching
Bit 0
PVC: Phase Voltage Protection
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
0 = non latching
Figure 41. Protection Configuration Register PC1
If the non-latching protection is selected, a POL will
attempt to restart every 130ms until the condition
that triggered the protection is removed. When
restarting, the output voltages follow tracking and
sequencing settings.
If the latching type is selected, a POL will turn off and
stay off. The POL can be turned on after 130ms, if
the condition that caused the fault is removed and
the respective bit in the ST register was cleared, or
Page 22 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
the Turn On command was recycled, or the input
voltage was recycled.
All protections can be classified into three groups
based on their effect on system operation: warnings,
faults, and errors.
9.3.2
Faults
This group includes overcurrent, overtemperature,
undervoltage, and tracking protections. Triggering
any protection in this group will turn off the POL.
9.3.2.1
9.3.1
Warnings
This group includes Overtemperature Warning and
Power Good Signal. The warnings do not turn off
POLs but rather generate signals that can be
transmitted to a host controller via the I2C bus.
9.3.1.1
Overtemperature Warning
The Overtemperature Warning is generated when
temperature of the controller exceeds 120°C. The
Overtemperature Warning changes the PT bit of the
status register ST to 0 and sends the signal to the
DPM.
Reporting is enabled in the GUI Fault
Management window or directly via the I2C by writing
into the PC3 register shown in Figure 43. When the
temperature falls below 117°C, the PT bit is cleared
and the Overtemperature Warning is removed.
9.3.1.2
Power Good
Power Good is an open collector output that is pulled
low, if the output voltage is outside of the Power
Good window. The window is formed by the Power
Good High threshold that is equal to 110% of the
output voltage and the Power Good Low threshold
that can be programmed at 90 or 95% of the output
voltage.
The Power Good protection is only enabled after the
output voltage reaches its steady state level. It is
disabled during the transitions of the output voltage
from one level to other as shown in Figure 42.
Overcurrent protection is active whenever the output
voltage of the POL exceeds the prebias voltage (if
any). When the output current reaches the OC
threshold, the output voltage will start decreasing.
As soon as the output voltage decreases below the
undervoltage protection threshold, the OC fault
signal is generated, the POL turns off and the OC bit
in the register ST is changed to 0. Both high side
and low side switches of the POL are turned off
instantly (fast turn-off).
The temperature compensation is added to keep the
OC
threshold
approximately
constant
at
temperatures above room temperature. Note that
the temperature compensation can be disabled in
the GUI Output Configuration window or directly via
the I2C by writing into the CLS register. However, it
is recommended to keep the temperature
compensation enabled.
9.3.2.2
Note: To retrieve status information, Status Monitoring in the GUI
POL Group Configuration Window should be enabled (refer
to JZM7100 Digital Power Manager Data Sheet). The DPM
will retrieve the status information from each POL on a
continuous basis.
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Undervoltage Protection
The undervoltage protection is only active during
steady state operation of the POL to prevent
nuisance tripping. If the output voltage decreases
below the UV threshold and there is no OC fault, the
UV fault signal is generated, the POL turns off, and
the UV bit in the register ST is changed to 0. The
output voltage is ramped down according to
sequencing and tracking settings (regular turn-off).
9.3.2.3
The Power Good Warning pulls the Power Good pin
low and changes the PG bit of the status register ST
to 0. It sends the signal to the DPM, if the reporting
is enabled. When the output voltage returns within
the Power Good window, the PG pin is pulled high,
the PG bit is cleared and the Power Good Warning is
removed. The Power Good pin can also be pulled
low by an external circuit to initiate the Power Good
Warning.
Overcurrent Protection
Overtemperature Protection
Overtemperature protection is active whenever the
POL is powered up. If temperature of the controller
exceeds 130°C, the OT fault is generated, POL turns
off, and the OT bit in the register ST is changed to 0.
The output voltage is ramped down according to
sequencing and tracking settings (regular turn-off).
If non-latching OTP is programmed, the POL will
restart as soon as the temperature of the controller
decreases below the Overtemperature Warning
threshold of 120°C.
Page 23 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
9.3.2.4
value of the difference exceeds 250mV, the tracking
fault signal is generated, the POL turns off, and the
TR bit in the register ST is changed to 0. Both high
side and low side switches of the POL are turned off
instantly (fast turn-off).
Tracking Protection
Tracking protection is active only when the output
voltage is ramping up. The purpose of the protection
is to ensure that the voltage differential between
multiple rails being tracked does not exceed 250mV.
This protection eliminates the need for external
clamping diodes between different voltage rails
which are frequently recommended by ASIC
manufacturers.
The tracking protection can be disabled, if it
contradicts requirements of a particular system (for
example turning into high capacitive load where
rising slew rate is not important). It can be disabled
in the GUI Fault Management window or directly via
the I2C bus by writing into the PC1 register.
When the tracking protection is enabled, the POL
continuously compares actual value of the output
voltage to its programmed value as defined by the
output voltage and its rising slew rate. If absolute
Vo
RUN
PT and OT
OC enabled
1
0
continuously enabled
1
0
Vo_Rise
H
K_
TR
1.0V
pre-biased output
L
K_
TR
Vo_Stable
Vo_Fall
Vo_Stable
Vo_Rise
Vo_Stable
OVP Limit
OVP Limit
PG High Limit
PG High Limit
OVP Limit
PG High Limit
Vo
PGLow Limit
UVP Limit
PGLow Limit
UVP Limit
Vo_Fall
H
K_
TR
L
K_
TR
PGLow Limit
UVP Limit
Time
Figure 42. Protections Enable Conditions
9.3.3
Errors
The group includes overvoltage protection and the
phase voltage error. The phase voltage error is not
available in JZY7015L.
9.3.3.1
Overvoltage Protection
The overvoltage protection is active whenever the
output voltage of the POL exceeds the pre-bias
voltage (if any). If the output voltage exceeds the
overvoltage protection threshold, the overvoltage
error signal is generated, the POL turns off, and the
OV bit in the register ST is changed to 0. The high
side switch is turned off instantly, and simultaneously
the low side switch is turned on to ensure reliable
protection of sensitive loads. The low side switch
provides low impedance path to quickly dissipate
energy stored in the output filter and achieve
effective voltage limitation.
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The OV threshold can be programmed from 110% to
130% of the output voltage setpoint, but not lower
than 1.0V.
9.3.4
Faults and Errors Propagation
The feature adds flexibility to the fault management
scheme by giving users control over propagation of
fault signals within and outside of the system. The
propagation means that a fault in one POL can be
programmed to turn off other POLs and devices in
the system, even if they are not directly affected by
the fault.
9.3.4.1
Grouping of POLs
Z-Series POLs can be arranged in several groups to
simplify fault management. A group of POLs is
defined as a number of POLs with interconnected
OK pins. A group can include from 1 to 32 POLs. If
fault propagation within a group is desired, the
propagation bit needs to be checked in the GUI Fault
Page 24 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
Management Window. The parameters can also be
programmed directly via the I2C bus by writing into
the PC3 register shown in Figure 43.
When propagation is enabled, the faulty POL pulls its
OK pin low. A low OK line initiates turn-off of other
POLs in the group.
R/W-0
R/W-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
PTM
PGM
TRP
OTP
OCP
UVP
OVP
R/W-1
Bit 7
PVP
Bit 0
Bit 7
PTM: Temperature warning Message
1 = enabled
0 = disabled
Bit 6
PGM: Power good message
1 = enabled
0 = disabled
Bit 5
TRP: Tracking fault propagation
1 = enabled
0 = disabled
Bit 4
OTP: Over temperature fault propagation
1 = enabled
0 = disabled
Bit 3
OCP: Over current fault propagation
1 = enabled
0 = disabled
Bit 2
UVP: Under voltage fault propagation
1 = enabled
0 = disabled
Bit 1
OVP: Over voltage error propagation
1 = enabled
0 = disabled
Bit 0
PVP: Phase voltage error propagation
1 = enabled
0 = disabled
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Figure 44. Fault and Error Propagation Window
In this case low OK line will signal DPM to pull other
OK lines low to initiate shutdown of other POLs as
programmed in the GUI Fault and Error Propagation
window. If an error is propagated, the DPM can also
generate commands to turn off a front end (a DC-DC
converter generating the intermediate bus voltage)
and trigger an optional crowbar protection to
accelerate removal of the IBV voltage.
9.3.4.2
Propagation Process
Propagation of a fault (OCP, UVP, OTP, and TRP)
initiates regular turn-off of other POLs. The faulty
POL in this case performs either the regular or the
fast turn-off depending on a specific fault as
described in section 9.3.2.
Propagation of an error initiates fast turn-off of other
POLs. The faulty POL performs the fast turn-off and
turns on its low side switch.
Figure 43. Protection Configuration Register PC3
In addition, the OK lines can be connected to the
DPM to facilitate propagation of faults and errors
between groups. One DPM can control up to 4
independent groups. To enable fault propagation
between groups, the respective bit needs to be
checked in the GUI Fault and Error Propagation
window shown in Figure 44.
Example of the fault propagation is shown in Figure
45 - Figure 46. In this three-output system (refer to
the block diagram in Figure 25), the POL powering
the output V3 (Ch 1 in the picture) encounters the
undervoltage fault after the turn-on. When the fault
propagation is not enabled, the POL turns off and
generates the UV fault signal. Because the UV fault
triggers the regular turn off, the POL meets its turnoff delay and falling slew rate settings during the
turn-ff process as shown in Figure 45. Since the UV
fault is programmed to be non-latching, the POL will
attempt to restart every 130ms, repeating the
process described above until the condition causing
the undervoltage is removed.
If the fault propagation between groups is enabled,
the POL powering the output V3 pulls its OK line low
and the DPM propagates the signal to the POL
powering the output V1 that belongs to other group.
The POL powering the output V1 (Ch3 in the picture)
executes the regular turn-off. Since both V1 and V3
have the same delay and slew rate settings they will
continue to turn off and on synchronously every
130ms as shown in Figure 46 until the condition
causing the undervoltage is removed. The POL
powering the output V2 continues to ramp up until it
reaches its steady state level.
130ms is the interval from the instant of time when
the output voltage ramps down to zero until the
output voltage starts to ramp up again. Therefore,
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Page 25 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
the 130ms hiccup interval is guaranteed regardless
of the turn-off delay setting.
Figure 45. Turn-On into UVP On V3. The UV Fault Is
Programmed To Be Non-Latching. Ch1 – V3
(Group C), Ch2 – V2, Ch3 – V1 (Group A)
Figure 46. Turn-On into UVP On V3. The UV Fault Is
Programmed To Be Non-Latching and Propagate
From Group C to Group A. Ch1 – V3 (Group C),
Ch2 – V2, Ch3 – V1 (Group A)
Summary of protections, their parameters and features is shown in Table 3.
Table 3. Summary of Protections Parameters and Features
Whenever VIN is applied
Turn
Off
No
Low Side
Switch
N/A
Warning
During steady state
No
N/A
Fault
Fault
Fault
Fault
Error
During ramp up
Whenever VIN is applied
When VOUT exceeds prebias
During steady state
When VOUT exceeds prebias
Fast
Regular
Fast
Regular
Fast
Off
Off
Off
Off
On
Code
Name
Type
When Active
PT
Warning
PG
Pretemperature
Warning
Power Good
TR
OT
OC
UV
OV
Tracking
Overtemperature
Overcurrent
Undervoltage
Overvoltage
9.4
PWM Parameters
Z-Series POLs utilize the digital PWM controller.
The controller enables users to program most of the
PWM performance parameters, such as switching
frequency, interleave, duty cycle, and feedback loop
compensation.
9.4.1
Switching Frequency
The switching frequency can be programmed in the
GUI PWM Controller window shown in Figure 47 or
directly via the I2C bus by writing into the INT register
shown in Figure 48. Note that the content of the
register can be changed only when the POL is
turned off.
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Propagation
Disable
Sends signal to
DPM
Sends signal to
DPM
Regular turn off
Regular turn off
Regular turn off
Regular turn off
Fast turn off
No
No
Yes
No
No
No
No
Switching actions of all POLs connected to the SD
line are synchronized to the master clock generated
by the DPM. Each POL is equipped with a PLL and
a frequency divider so they can operate at multiples
(including fractional) of the master clock frequency
as programmed by a user. The POL converters can
operate at 500kHz, 750kHz, and 1MHz. Although
synchronized, switching frequencies of different
POLs are independent of each other.
It is
permissible to mix POLs operating at different
frequencies in one system. It allows optimizing
efficiency and transient response of each POL in the
system individually.
Page 26 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
input source from all POLs is added together as
shown in Figure 49.
Figure 49. Input Voltage Noise, No Interleave
Figure 47. PWM Controller Window
R/W-0
R/W-0
R/W-0
R/W-01)
R/W-01)
R/W-01)
R/W-01)
R/W-01)
FRQ2
FRQ1
FRQ0
INT4
INT3
INT2
INT1
INT0
Bit 7
Bit 7:5 FRQ[2:0]: PWM Frequency Selection
000: 500kHz
001: 750kHz
010: 1000lHz
011: 1250kHz
100: 1250kHz
101: 1500kHz
110: 1750kHz
111: 2000kHz
Bit 0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Figure 50 shows the input voltage noise of the threeoutput system with programmed interleave. Instead
of all three POLs switching at the same time as in
the previous example, the POLs V1, V2, and V3
switch at 0°, 123.75°, and 247.5°, respectively.
Noise is spread evenly across the switching cycle
resulting in more than 1.5 times reduction. To
achieve similar noise reduction without the interleave
will require the addition of an external LC filter.
Bit 4:0 INT[4:0]: Interleave position
00h: Ton starts with 0.0° Phase lag to SYNQ/DATA Line
01h: Ton starts with 11.25° Phase lag to SYNQ/DATA Line
02h: Ton starts with 22.50° Phase lag to SYNQ/DATA Line
…
1Fh: Ton starts with 348.75° Phase lag to SYNQ/DATA Line
1)
Initial value depends on the state of the Interleave Mode (IM) Input:
IM=Open: At POR reset the 5 corresponding ADDRESS bits are loaded
IM=Low: At POR reset a 0 is loaded
Figure 48. Interleave Configuration Register INT
9.4.2
Interleave
Interleave is defined as a phase delay between the
synchronizing slope of the master clock on the SD
pin and PWM signal of a POL. The interleave can
be programmed in the GUI PWM Controller window
or directly via the I2C bus by writing into the INT
register.
Every POL generates switching noise.
If no
interleave is programmed, all POLs in the system
switch simultaneously and noise reflected to the
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Figure 50. Input Voltage Noise with Interleave
Similar noise reduction can be achieved on the
output of POLs connected in parallel. Figure 51 and
Figure 52 show the output noise of two JZY7015Ls
connected in parallel without and with 180°
interleave, respectively. Resulting noise reduction is
Page 27 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
more than 2 times and is equivalent to doubling
switching frequency or adding extra capacitance on
the output of the POLs.
between the two parameters is characterized by the
duty cycle and can be estimated from the following
equation:
DC =
VOUT
,
VIN .MIN
Where, DC is the duty cycle, VOUT is the required
maximum output voltage (including margining),
VIN.MIN is the minimum input voltage.
It is good practice to limit the maximum duty cycle of
the PWM controller to a somewhat higher value
compared to the steady-state duty cycle as
expressed by the above equation. This will further
protect the output from excessive voltages. The duty
cycle limit can be programmed in the GUI PWM
Controller window or directly via the I2C bus by
writing into the DCL register shown in Figure 53.
Figure 51. Output Voltage Noise, Full Load, No Interleave
R/W-1
R/W-1
R/W-1
R/W-0
R/W-1
R/W-0
R/W-0
DCL5
DCL4
DCL3
DCL2
DCL1
DCL0
HI
Bit 7
R/W-0
LO
Bit 0
Bit 7:2 DCL[5:0], Duty Cycle Limitation
00h: 0
01h: 1/64
…
3Fh: 63/64
Bit 1:
HI, ADC high saturation feed-forward
0: disabled
1: enabled
Bit 0:
LO, ADC low saturation feed-forward
0: disabled
1: enabled
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Figure 53. Duty Cycle Limit Register
Figure 52. Output Voltage Noise, Full Load, 180° Interleave
The JZY7015L interleave feature is similar to that of
multiphase converters, however, unlike in the case of
multiphase converters, interleave does not have to
be equal to 360/N, where N is the number of POLs in
a system. JZY7015L interleave is independent of
the number of POLs in a system and is fully
programmable in 11.25° steps. It allows maximum
output noise reduction by intelligently spreading
switching energy.
9.4.3
Duty Cycle Limit
The JZY7015L is a step-down converter therefore
VOUT is always less than VIN. The relationship
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9.4.4
ADC Saturation Feedforward
To speed up the PWM response in case of heavy
dynamic loads, the duty cycle can be forced either to
0 or the duty cycle limit depending on the polarity of
the transient. This function is equivalent to having
two comparators defining a window around the
output voltage setpoint. When an error signal is
inside the window, it will produce gradual duty cycle
change proportional to the error signal. If the error
signal goes outside the window (usually due to large
output current steps), the duty cycle will change to its
limit in one switching cycle. In most cases this will
significantly improve transient response of the
controller, reducing amount of required external
capacitance.
Under certain circumstances, usually when the
maximum duty cycle limit significantly exceeds its
Page 28 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
nominal value, the ADC saturation can lead to the
overcompensation of the output error.
The
phenomenon manifests itself as low frequency
oscillations on the output of the POL. It can usually
be reduced or eliminated by disabling the ADC
saturation or limiting the maximum duty cycle to 120140% of the calculated value. It is not recommended
to use ADC saturation for output voltages higher
than 2.0V.
B3). The coefficients are automatically calculated
when desired frequency of poles and zeros is
entered in the GUI PWM Controller window. The
coefficients are stored in the C0H, C0L, C1H, C1L,
C2H, C2L, C3H, C3L, B1, B2, and B3 registers.
The ADC saturation feedforward can be
programmed in the GUI PWM Controller window or
directly via the I2C bus by writing into the DCL
register.
Programming feedback loop compensation allows
optimizing POL performance for various application
conditions. For example, increase in bandwidth can
significantly improve dynamic response.
9.4.5
Feedback Loop Compensation
Feedback loop compensation can be programmed in
the GUI PWM Controller window by setting
frequency of poles and zeros of the transfer function.
9.5
The transfer function of the POL converter is shown
in Figure 54. It is a third order function with two
zeros and three poles. Pole 1 is the integrator pole,
Pole 2 is used in conjunction with Zero 1 and Zero 2
to adjust the phase lead and limit the gain increase
in mid band. Pole 3 is used as a high frequency lowpass filter to limit PWM noise.
Magnitude[dB]
Z1
50
P1 Z2
P2
P3
P1: Pole 1
P2: Pole 3
P3: Pole 3
Z1: Zero 1
Z2: Zero 2
40
30
20
10
0.1
1
10
100
1000
0.1
1
10
100
1000
Freq
[kHz]
Phase
[°]
+45
0
Freq
[kHz]
-45
Note:
The GUI automatically transforms zero and pole
frequencies into the digital filter coefficients. It is strongly
recommended to use the GUI to determine the filter
coefficients.
Current Share
The POL converters are equipped with the digital
current share function. To activate the current share,
interconnect the CS pins of the POLs connected in
parallel. The digital signal transmitted over the CS
line sets output currents of all POLs to the same
level.
When POLs are connected in parallel, they must be
included in the same parallel bus in the GUI System
Configuration window shown in Figure 55. In this
case, the GUI automatically copies parameters of
one POL onto all POLs connected to the parallel
bus. It makes it impossible to configure different
performance parameters for POLs connected in
parallel except for interleave and load regulation
settings that are independent. The interleave allows
to reduce and move the output noise of the
converters connected in parallel to higher
frequencies as shown in Figure 51 and Figure 52.
The load regulation allows controlling the current
share loop gain in case of small signal oscillations. It
is recommended to always add a small amount of
load regulation to one of the converters connected in
parallel to reduce loop gain and therefore improve
stability.
-90
9.6
-135
-180
Figure 54. Transfer Function of PWM
Positions of poles and zeroes are determined by
coefficients of the digital filter.
The filter is
characterized by four numerator coefficients (C0, C1,
C2, C3) and three denominator coefficients (B1, B2,
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Performance Parameters Monitoring
The POL converters can monitor their own
performance parameters such as output voltage,
output current, and temperature.
The output voltage is measured at the output sense
pins, output current is measured using the ESR of
the output inductor and temperature is measured by
the thermal sensor built into the controller IC. Output
Page 29 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
current readings are adjusted based on temperature
readings to compensate for the change of ESR of
the inductor with temperature.
An 8-Bit Analog to Digital Converter (ADC) converts
the output voltage, output current, and temperature
into a digital signal to be transmitted via the serial
interface. The ADC allows a minimum sampling
frequency of 1kHz for all three values.
Monitored parameters are stored in registers (VOM,
IOM, and TMON) that are continuously updated. If
the Retrieve Monitoring bits in the GUI Group
Configuration window shown in Figure 56 are
checked, those registers are being copied into the
ring buffer located in the DPM. Contents of the ring
buffer can be displayed in the GUI IBS Monitoring
Window shown in Figure 57 or it can be read directly
via the I2C bus using high and low level commands
as described in the “DPM Programming Manual”.
Figure 55. GUI System Configuration Window
10. Safety
The JZY7015L POL converters do not provide
isolation from input to output. The input devices
powering JZY7015L must provide relevant isolation
requirements according to all IEC60950 based
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standards. Nevertheless, if the system using the
converter needs to receive safety agency approval,
certain rules must be followed in the design of the
system. In particular, all of the creepage and
clearance requirements of the end-use safety
requirements must be observed.
These
Page 30 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
requirements are included in UL60950 - CSA6095000 and EN60950, although specific applications may
have other or additional requirements.
The JZY7015L POL converters have no internal
fuse. If required, the external fuse needs to be
provided to protect the converter from catastrophic
failure. Refer to the “Input Fuse Selection for DC/DC
converters” application note on www.cd4power.com
for proper selection of the input fuse. Both input
traces and the chassis ground trace (if applicable)
must be capable of conducting a current of 1.5 times
the value of the fuse without opening. The fuse must
not be placed in the grounded input line.
Abnormal and component failure tests were
conducted with the POL input protected by a fastacting 65 V, 15 A, fuse. If a fuse rated greater than
15 A is used, additional testing may be required.
In order for the output of the JZY7015L POL
converter to be considered as SELV (Safety Extra
Low Voltage), according to all IEC60950 based
standards, the input to the POL needs to be supplied
by an isolated secondary source providing a SELV
also.
Figure 56. POL Group Configuration Window
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Page 31 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
Figure 57. IBS Monitoring Window
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Page 32 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
11. Mechanical Drawings
All Dimensions are in mm
Tolerances:
0.5-10
±0.1
10-100
±0.2
8
2.03
14±0.30
4.1
2.54
8.00±0.20
6
1.27
10
27.94
32±0.30
0.4
16
Figure 58. Mechanical Drawing
‘
Figure 59. Pinout Diagram (Bottom View)
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Page 33 of 34
JZY7015L 15A DC-DC Intelligent POL
3V to 13.2V Input • 0.5V to 5.5V Output
8.6
32
3
6
10
10
(x 3)
1.4
0.1
Top View
0.8
14.2 16.9
1
0.1
1.1
2.4
2.03
1.27
2.54
(x 22)
Figure 60. Recommended PCB Pad Sizes
A IR Ä
1 4 .9
1 5 .2
8 .6
1 0 .6
1 4 .9
1 4 .6
6 .4
1 5 .1
1 1 .4
1 6 .0
2 4 .2
V i+
Vo+
8 .4
0 .4 5 m m Ø Th erm a l V ia x 4 8
V-
0 .4 5 m m Ø T h erm a l V ia x 4 8
0 .4 5 m m Ø T he rm al V ia x 56
4 1 .3
Figure 61. Recommended PCB Layout for Multilayer PCBs
Notes:
1. NUCLEAR AND MEDICAL APPLICATIONS - C&D Technologies products are not designed, intended for use in, or authorized for use as
critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express
written consent of the respective divisional president of C&D Technologies, Inc.
2. TECHNICAL REVISIONS - Specifications are subject to change without notice
I2C is a trademark of Philips Corporation.
C&D Technologies Inc. reserve the right to alter or improve the specification, internal design or manufacturing process at any time, without notice. Please
check with your supplier or visit our website to ensure that you have the current and complete specification for your product before use.
C&D Technologies, Inc.
3400 E Britannia Drive, Tucson,
Arizona 85706, USA
C&D Technologies, Inc.
11 Cabot Boulevard, Mansfield,
MA 02048-1151, USA
Tel: +1 (800) 547-2537
Fax: +1 (520) 741-4598
email: [email protected]
Tel: +1 (508) 339-3000
Fax: +1 (800) 233-276
email: [email protected]
© C&D Technologies Inc. 2005
No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including, but not limited to, photography,
photocopy, magnetic or other recording means, without prior written permission from C&D Technologies Inc. Instructions for use are available from
www.cd4power.com
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