20A/240W

Technical
Specification
PQ60120HPA20
48Vin
12Vout
20Amp
2000Vdc
Half-brick
Input
Output
Current
Isolation
DC/DC Converter
The PQ60120HPA20 PowerQor™ Peta half-brick converter
is a next-generation, board-mountable, isolated, fixed
switching frequency DC/DC converter that uses synchronous
rectification to achieve extremely high conversion efficiency.
The power dissipated by the converter is so low that a
heatsink is not required, which saves cost, weight, height,
and application effort. The Peta series converters offer
industry leading output current for a standard “half-brick”
module. In addition to typical single ouput voltage
applications, the Peta units can also be used to provide a
wide input range Intermediate Bus for IBA systems.
PQ60120HPA20 Module
Operational Features
• Ultra-high efficiency, 92.5% at full rated load
• Delivers up to 240 Watts of output power (20A) with
minimal derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient capability
• Fixed frequency switching provides predictable EMI performance
Protection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection
• Thermal shutdown
Mechanical Features
Safety Features
• Industry standard pin-out configuration
• Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
• Total height only 0.43” (10.8mm), permits better
airflow and smaller card pitch
• Total weight: 2.7 oz. (75 grams)
Control Features
• On/Off control referenced to input side (positive and
negative logic options are available)
• Remote sense for the output voltage compensates for
output distribution drops
• Output voltage trim permits custom voltages and
voltage margining
Product # PQ60120HPA20
Phone 1-888-567-9596
• 2000V, 30 MW input-to-output isolation (optional
modules available with 2,250V isolation)
• UL 60950 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Contents
Page No.
Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
PQ60120HPA20 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . 3-4
Standards Compliance & Qualifications Testing . . . . . . . . . . . . . . . . . . . 4
PQ60120HPA20 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
PQ60120HPA20 Application Section . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
Mechanical Diagram
Top View
35-75 V
12 V
20 A
Half-brick
Side View
2.40
(61.0)
1.400
Max. Height
(35.56)
0.43
1.000
(10.8)
(25.40)
0.700
(17.78)
0.400
(10.16)
0.145
(3.68)
See Note 3
9
8
7
6
5
2.30
(58.4)
0.19
(4.8)
1
2
4
0.037+/-0.029
PIN
Farside
Typical
0.50
(12.7)
(0.94+/-0.73)
Bottomside Clearance
0.400 (10.16)
See Note 9
1.400
(35.56)
NOTES
PIN Designation
1) Pins 1-4, 6-8 are 0.040” (1.02mm) diameter. with
0.080” (2.03mm) diameter standoff shoulders.
2) Pins 5 and 9 are 0.080” (2.03 mm) diameter with
0.125” (3.18mm) diameter standoff shoulders.
3) Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
4) All Pins: Material - Copper Alloy
Finish - Gold over Nickel plate
5) Undimensioned components are shown for visual reference only.
6) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7) Weight: 2.7 oz. (75 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) UL/TUV standards require a clearance greater than 0.04” (1.02mm)
Pin
No.
Name
Function
1
Vin (+)
Positive input voltage
2
ON/OFF
TTL input to turn converter on and off, referenced
to Vin(-), with internal pull up.
3
N/A
4
Vin (-)
Negative input voltage
5
Vout (-)
Negative output voltage
6
Sense (-)
Return remote sense
7
TRIM
Output voltage trim
8
Sense (+)
Positive remote sense
9
Vout (+)
Positive output voltage
between input and output for Basic insulation. This issue should be considered if any copper traces are on the top side of the user’s board.
Note that the ferrite cores are considered part of the input/primary
circuit.
10) The flanged pins are designed to permit surface mount
soldering (avoiding the wave soldering process) through
the use of the flanged pin-in-paste technique.
Product # PQ60120HPA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
20 A
Half-brick
PQ60120HPA20 Electrical Characteristics
TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min.
Typ.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)1
Operating Temperature
-40
Storage Temperature
-55
Voltage at ON/OFF input pin
-2
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (C1\L\C2)
Recommended External Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Max.
100
80
100
2000
100
125
18
V
V
V
V
°C
°C
V
V
35
48
75
31.5
29.5
2.2
33.3
31.0
2.3
90
2
0.03
3.5
5
210
1\3\6.4
47
34.4
32.4
2.4
7.6
110
5
20
12.00
12.12
11.88
11.75
0
22
0.1
0
Units Notes & Conditions
+0.05 \ 6 +0.1 \ 12
+0.1 \ 12 +0.2 \ 24
+45
+90
12.33
50
100
15
30
20
23.5
25
7.5
0.4
1.0
10
50
10,000
DYNAMIC CHARACTERISTICS
continuous
continuous
100ms transient, square wave
Basic insulation level, Pollution degree 2
V
V
V
A
100% Load, 35 Vin
mA
mA
A 2s
V
1000V/ms input transient
mA
RMS thru 10µH inductor; Figures 13 & 15
mA
RMS; Figures 13 & 14
A
fast blow external fuse recommended
µF\µH\µF internal values, see Figure E
µF
Typical ESR 0.1-0.2W, see Figure 13
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
A
mA
µF
over sample, line, load, temperature & life
20MHz bandwidth; Figures 13 & 16
Full Load, see Figures 13 & 16
Full Load, see Figures 13 & 16
Subject to thermal derating; Figures 5-8
Output Voltage 10% Low; Figure 17
Negative current drawn from output
Negative current drawn from output
12Vout at 20A Resistive Load
Input Voltage Ripple Rejection
70
dB
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
650
mV
For a Step Change in Output Current (5A/µs)
650
mV
Settling Time
400
µs
Turn-On Transient
Turn-On Time
20
24
28
ms
Start-Up Inhibit Time
180
200
240
ms
Output Voltage Overshoot
0
%
120 Hz; Fig. 20
%
%
Figures 1 - 4
Figures 1 - 4
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
EFFICIENCY
100% Load
50% Load
TEMPERATURE LIMITS FOR POWER DERATING CURVES
92.5
93.5
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)2
Isolation Resistance
Isolation Capacitance3
125
125
125
2000
30
3300
50% to 75% to 50% Iout max; Figure 11
50% to 75% to 50% Iout max; Figure 12
to within 1% Vout nom
Full load, Vout=90% nom.; Figures 9 & 10
-40°C to +125°C; Figure A
10,000 µF load capacitance, Iout = 0A
V
MW
pF
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: For applications requiring 2,250V of isolation, order module with V option (see ordering information on last page of this datasheet).
Note 3: Higher values of isolation capacitance can be added external to the module.
Product # PQ60120HPA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
20 A
Half-brick
PQ60120HPA20 Electrical Characteristics (Continued)
Parameter P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency
230
255
280
kHz
ON/OFF Control (Option P)
Off-State Voltage -2
0.8
V
On-State Voltage
2.7
18
V
ON/OFF Control (Option N)
Off-State Voltage
2.7
18
V
On-State Voltage
-2
0.8
V
ON/OFF Control (Either Option)
Pull-Up Voltage
Vin/6
15
V
Pull-Up Resistance
42
kW
Output Voltage Trim Range
-20
+10
%
Output Voltage Remote Sense Range
+10
%
Output Over-Voltage Protection
115
120
125
%
Over-Temperature Shutdown
120
°C
Over-Temperature Shutdown Restart Hysteresis
10
°C
Load Current Scale Factor
714
RELIABILITY CHARACTERISTICS
Regulation stage and Isolation stage
Figures A, B
Measured across Pins 9 & 5; Figures C & 23
Measured across Pins 9 & 5; Figure 23
Over full temp range; % of nominal Vout
Average PCB Temperature
See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,200LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 200LFM, 40oC Ta
106 Hrs. See website for latest values
Calculated MTBF (Telcordia)
2.24
Calculated MTBF (MIL-217)
1.55
Field Demonstrated MTBF
6
Standards Compliance & Qualifications Testing
Parameter P
Notes
UL/cUL 60950 EN60950 72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
STANDARDS COMPLIANCE
• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
Parameter P
test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
• Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact factory for official product family qualification document.
Product # PQ60120HPA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
100
35-75 V
12 V
20 A
Half-brick
96
95
95
94
Efficiency (%)
Efficiency (%)
90
85
93
92
91
80
90
35 Vin
48 Vin
75 Vin
75
88
70
0
2
4
6
8
10
12
14
16
25 C
40 C
55 C
89
18
0
20
100
300
400
500
Air Flow (LFM)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
12
20
18
11
16
Power Dissipation (W)
Power Dissipation (W)
200
14
12
10
8
6
35 Vin
4
75 Vin
2
4
6
8
10
12
14
16
18
8
25 C
40 C
55 C
6
0
0
9
7
48 Vin
2
10
0
20
100
200
300
400
500
Air Flow (LFM)
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 4: Power dissipation at nominal output voltage and 60% rated power
vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
20
18
Semiconductor junction temperature is
within 1°C of surface temperature
16
Iout (A)
14
12
10
8
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
6
4
2
0
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 5: Maximum output power derating curves vs. ambient air temperature
for airflow rates of 0 LFM through 400 LFM with air flowing from input to
output (nominal input voltage).
Product # PQ60120HPA20
Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 18 amp load current (217 Watts) with
55°C air flowing at the rate of 200 LFM. Air is flowing across the converter
from input to output (nominal input voltage).
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
20 A
Half-brick
20
Semiconductor junction temperature is
within 1°C of surface temperature
18
16
Iout (A)
14
12
10
8
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
6
4
2
0
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 7: Maximum output power derating curves vs. ambient air temperature
for airflow rates of 0 LFM through 400 LFM with air flowing from output to
input (nominal input voltage).
Figure 8: Thermal plot of converter at 17 amp load current (204 Watts) with
55°C air flowing at the rate of 200 LFM. Air is flowing across the converter
from output to input (nominal input voltage).
Figure 9: Turn-on transient at full load (resistive load) (10 ms/div). Input
voltage pre-applied. Top Trace: Vout (5V/div). Bottom Trace: ON/OFF
input (5V/div)
Figure 10: Turn-on transient at zero load (10 ms/div).
Top Trace: Vout (5V/div)
Bottom Trace: ON/OFF input (5V/div)
Figure 11: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF, 450
mW ESR tantalum and 1µF ceramic. Top trace: Vout (1V/div), Bottom
trace: Iout (5A/div).
Figure 12: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max): dI/dt = 5A/µs). Load cap: 480µF, 15 mW
ESR tantalum and 1µF ceramic. Top trace: Vout (1V/div), Bottom trace:
Iout (5A/div).
Product # PQ60120HPA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
20 A
Half-brick
See Fig. 15
10 µH
source
impedance
See Fig. 14
See Fig. 16
iS
DC/DC
Converter
iC
VSOURCE
VOUT
15 µF,
1 µF
47 µF,
<1W ESR
ceramic 450mW ESR
capacitor
tantalum
capacitor
electrolytic
capacitor
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 10µH source impedance and 47µF electrolytic
capacitor (200 mA/div). (See Figure 13)
Figure 15: Input Reflected Ripple Current, is, through a 10 µH source inductor
at nominal input voltage and rated load current (5 mA/div). (See Figure 13)
Figure 16: Output Voltage Ripple at nominal input voltage and rated load
current (20 mV/div). Load capacitance: 1µF ceramic capacitor and 15µF
tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13)
Output Voltage (V)
Figure 13: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 14), Input Reflected Ripple Current
(Figure 15) and Output Voltage Ripple (Figure 16).
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
35 V
48 V
75 V
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves
and converter shutdown points.
Product # PQ60120HPA20
Phone 1-888-567-9596
Figure 18: Load current (10A/div) as a function of time when the converter
attempts to turn on into a 1 mW short circuit. Top trace (2ms/div) is an
expansion of the on-time portion of the bottom trace.
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
1
35-75 V
12 V
20 A
Half-brick
0
-10
Output Impedance (W)
35 Vin
48 Vin
75 Vin
0.01
0.001
Forward Transmission (dB)
-20
0.1
-30
-40
35 Vin
48 Vin
75 Vin
-50
-60
-70
-80
-90
0.0001
-100
10
100
1,000
10,000
100,000
10
100
Hz
1,000
10,000
100,000
Hz
Figure 19: Magnitude of incremental output impedance (Zout = vout/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Figure 20: Magnitude of incremental forward transmission (FT = vout/vin) for
minimum, nominal, and maximum input voltage at full rated power.
20
100
0
35 Vin
48 Vin
75 Vin
-10
-20
-30
Input Impedance (W)
Reverse Transmission (dB)
10
10
35 Vin
48 Vin
75 Vin
1
-40
-50
0.1
10
100
1,000
10,000
100,000
10
Hz
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for
minimum, nominal, and maximum input voltage at full rated power.
100
1,000
Hz
10,000
100,000
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
10
9
Vout Trim-up (%)
8
7
6
5
4
3
2
1
0
40.0
100% Load
50% Load
0% Load
39.5
39.0
38.5
38.0
37.5
37.0
36.5
36.0
35.5
35.0
Input Voltage (V)
Figure 23: Achieveable trim-up percentage vs. input voltage. at output loads of
0%, 50% and full load.
Product # PQ60120HPA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 8
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
20 A
Half-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor series converter uses a two-stage power
conversion topology. The first stage is a buck-converter that
keeps the output voltage constant over variations in line, load,
and temperature. The second stage uses a transformer to
provide the functions of input/output isolation and voltage stepdown to achieve the low output voltage required.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input
is referenced to the return terminal of the input bus, Vin(-).
There are two versions of the converter that differ by the sense
of the logic used for the ON/OFF input.
Both the first stage and the second stage switch at a fixed
frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state
resistance, dissipate far less energy than Schottky diodes. This
is the primary reason that the PowerQor converter has such
high efficiency, even at very low output voltages and very high
output currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or
potting material to help conduct the dissipated energy to the
heatsink. The PowerQor converter can thus be built more simply
and reliably using high yield surface mount techniques on a PCB
substrate.
The PowerQor series of half-brick, quarter-brick and eighthbrick converters uses the industry standard footprint and pin-out
configuration.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Pin 8 should be connected to Vout(+) and Pin 6 should be
connected to Vout(-) at the point on the board where regulation
is desired. A remote connection at the load can adjust for a
voltage drop only as large as that specified in this datasheet,
that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 8 and 6 must be connected for proper regulation of
the output voltage. If these connections are not made, the
converter will deliver an output voltage that is slightly lower than
its specified value.
Positive Logic
(Permanently Enabled)
274k
TTL/
CMOS
ON/OFF
Vin(_)
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60120HPA20
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5V
Vin(+)
5V
ON/OFF
Open Collector Enable Circuit
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative
logic version, the ON/OFF signal is active low (meaning that a
low turns the converter on). Figure A details five possible circuits
for driving the ON/OFF pin. Figure B is a detailed look of the
internal ON/OFF circuitry.
www.synqor.com
50k
ON/OFF
TTL
100pF
50k
Vin(_)
Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2HP612K Rev. F
08/12/09
Page 9
Input:
Output:
Current:
Package:
Technical Specification
Note: the output over-voltage protection circuit senses the
voltage across the output (pins 9 and 5) to determine when
it should trigger, not the voltage across the converter’s sense
leads (pins 8 and 6). Therefore, the resistive drop on the board
should be small enough so that output OVP does not trigger,
even during load transients.
OUTPUT VOLTAGE TRIM (Pin 7): The TRIM input permits
the user to adjust the output voltage across the sense leads up
or down according to the trim range specifications.
To decrease the output voltage, the user should connect a
resistor between Pin 7 and Pin 6 (SENSE(-) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be
Rtrim-down =
- 2 (kW)
(100%
D )
where
D% =
Vnominal – Vdesired
x 100%
Vnominal
To increase the output voltage, the user should connect a
resistor between Pin 7 and Pin 8 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be
Rtrim-up
=
(
)
Vnominal – 2
x VDES + VNOM
1.225
VDES - VNOM
(kW)
Figure C graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the
output voltage can be trimmed up or down.
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim
pin. The node is internally bypassed to eliminate noise.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping avoid an
input system instability problem, described in more detail in the
application note titled “Input System Instability”. The lockout
circuitry is a comparator with DC hysteresis. When the input
voltage is rising, it must exceed the typical Turn-On Voltage
Threshold value (listed on the specification page) before the
converter will turn on. Once the converter is on, the input
voltage must fall below the typical Turn-Off Voltage Threshold
value before the converter will turn off.
Input Over-Voltage Shutdown: Available on PQ48 models
only. The converter turns off when the input voltage is too
high, allowing the converter to withstand an input voltage as
high as 100V without destruction. The shutdown circuitry is a
comparator with DC hysteresis. When the input voltage exceeds
the typical Input Over-Voltage Shutdown value, the converter
will turn off. Once the converter is off, it will turn back on when
the input voltage falls below the minimum Input Over-Voltage
Shutdown value.
Output Current Limit: The maximum current limit remains
constant as the output voltage drops. However, once the
impedance of the short across the output is small enough to
make the output voltage drop below the specified Output DC
Current-Limit Shutdown Voltage, the converter turns off.
10,000
Trim Resistance (kOhms)
35-75 V
12 V
20 A
Half-brick
1,000
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
100
10
1
0
2
4
6
8
% Increase in Vout
10
12
14
16
% Decrease in Vout
Figure C: Trim Graph for 12Vout module
Product # PQ60120HPA20
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18
20
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions. After
200 ms the converter will automatically restart.
www.synqor.com
Doc.# 005-2HP612K Rev. F
08/12/09
Page 10
Input:
Output:
Current:
Package:
Technical Specification
Over-Temperature Shutdown: A temperature sensor on
the converter senses the average temperature of the module.
The thermal shutdown circuit is designed to turn the converter
off when the temperature at the sensed location reaches the
35-75 V
12 V
20 A
Half-brick
Over-Temperature Shutdown value. It will allow the converter
to turn on again when the temperature of the sensed location
falls by the amount of the Over-Temperature Shutdown Restart
Hysteresis value.
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input System
Instability” is available on the SynQor web site (www.synqor.
com) which provides an understanding of why this instability
arises, and shows the preferred solution for correcting it.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shut down for any reason. When an output short is present, this
generates a 5Hz “hiccup mode,” which prevents the converter
from overheating. In all, there are seven ways that the converter
can be shut down, initiating a Startup Inhibit Period:
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
• Input Under-Voltage Lockout
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current,
which otherwise could exceed the rating of an external electrolytic
input capacitor. The recommended external input capacitance
is specified in the “Input Characteristics” section. More detailed
information is available in the application note titled “EMI
Characteristics” on the SynQor website.
• Output Over-Voltage Protection
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
Vout(+)
Vin(+)
Electrolytic
Capacitor
External
Input
Filter
Vin
47µF
Vsense(+)
Trim
ON/OFF
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+)
C1
C2
Vin(_)
Figure E: Internal Input Filter Diagram (component values
listed on page 3).
Product # PQ60120HPA20
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Doc.# 005-2HP612K Rev. F
08/12/09
Page 11
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
20 A
Half-brick
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the
Input Under-Voltage Lockout is released, and a Startup Inhibit
Period is initiated. At the end of this delay, the ON/OFF pin is
evaluated, and since it is active, the unit turns on.
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
OFF ON
Vout
OFF
ON
20ms (typical
turn on time)
200ms
(typical start-up
inhibit period)
t1
t0
200ms
200ms
t2
t
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60120HPA20
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Doc.# 005-2HP612K Rev. F
08/12/09
Page 12
35-75 V
12 V
20 A
Half-brick
Input:
Output:
Current:
Package:
Technical Specification
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
PQ 6 0 1 2 0 H P A 2 0 N K S
Options
(see
Ordering Information)
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character
base part number and the additional characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
Output Current
Model Number
Input voltage
Output
Voltage
Max Output
Current
PQ60012HPAA0xyz
35-75V
1.2V
100A
PQ60015HPAA0xyz
35-75V
1.5V
100A
PQ60018HPAA0xyz
35-75V
1.8V
100A
PQ60018HPA80xyz
35-75V
1.8V
80A
PQ60025HPA80xyz
35-75V
2.5V
80A
PQ60033HPA70xyz
35-75V
3.3V
70A
PQ60050HPA45xyz
35-75V
5.0V
45A
PQ60120HPA20xyz
35-75V
12V
20A
Thermal Design
Performance Level
Package Size
Output Voltage
Input Voltage
Product Family
The first 12 characters comprise the base part number and
the last 3 characters indicate available options. The “-G”
suffix indicates 6/6 RoHS compliance.
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium,
Hexavalent Chromium, Mercury, Polybrominated Biphenyls
(PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical
and Electronic Equipment. This SynQor product is 6/6 RoHS
compliant. For more information please refer to SynQor’s
RoHS addendum available at our RoHS Compliance / Lead Free
Initiative web page or e-mail us at [email protected]
The following options must be included in place of the w x y z
spaces in the model numbers listed above.
Options Description: w x y z
Thermal Design
A - Open Frame
Enable Logic
Pin Style
Feature Set
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250”
S - Standard
F - Full Feature
(1.2-1.8V only)
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for
more options.
PATENTS
SynQor holds the following U.S. patents, one or more of which apply to
this product. Additional patent applications may be pending or filed in
the future.
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ60120HPA20
978-849-0600
888-567-9596
978-849-0602
[email protected]
www.synqor.com
155 Swanson Road
Boxborough, MA 01719
USA
Phone 1-888-567-9596
5,999,417
6,222,742
6,545,890
6,577,109
6,594,159
6,731,520
6,894,468
6,896,526
6,927,987
7,050,309
7,072,190
7,085,146
7,119,524
7,269,034
7,272,021
7,272,023
7,558,083
7,564,702
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our website or is available upon request from SynQor.
Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
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Doc.# 005-2HP612K Rev. F
08/12/09
Page 13
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