DGQ25A - Delta Electronics

DGQ25A
FEATURES

Digital controller with auto compensation

PMBus compatibility

Fast transient response

High efficiency:
93.7% @12Vin, 3.3V/25A out

Size: 22.9x12.7x10.2mm(0.90”x0.50”x0.40”)

Surface mount

No minimum load required

Wide input range:8V~12.8V

Pre-bias start up

Output voltage programmable from 0.7Vdc to
3.3Vdc via external resistors or PMBUS
command.

Default fixed frequency operation:600kHz

Frequency can be synchronized with an
external clock

Input UVLO,OVP, Output OVP, OTP, OCP, SCP

Remote ON/OFF

Multiple modules parallel operation

ISO 9000, TL 9000, ISO 14001 certified
manufacturing facility

Delphi Series DGQ25A, Non-Isolated,
Digital Smart DC/DC Power Module:
8.0~12.8Vin, 0.7Vo~3.3Vo, 25A Iout
The DGQ25A, 8.0~12.8V wide input, single output,
non-isolated smart power module is the latest offering from a
world leader in power systems technology and manufacturing
-- Delta Electronics, Inc. DGQ25A is a digital module that can
achieve high efficiency, automatic compensation, fast
transient response, PMBus communication and parallel
operation. It can provide a programmable output voltage from
0.7V to 3.3V by using an external resistor or through PMBus
command.
It provides a highly efficient, high power and current
density and very cost effective power module solution. With
creative design technology and optimization of component
placement, these converters possess outstanding electrical
and thermal performance, as well as extremely high reliability
under highly stressful operating conditions.
DS_ DGQ25A _03122014
UL/cUL 60950-1 (US & Canada) recognized
APPLICATIONS

Telecom / DataCom

Distributed power architectures

Servers and workstations

LAN / WAN applications

Data processing applications
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P1
Ta = 25°C, airflow rate = 200 LFM, Vin=12Vdc nominal, Io.max=25A , single module operation unless otherwise noted.
TECHNICAL SPECIFICATIONS
PARAMETER
NOTES and CONDITIONS
DGQ25A
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Operating Ambient Temperature
Storage Temperature
INPUT CHARACTERISTICS
Operating Input Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
ON/OFF Control
Logic High Voltage
Logic Low Voltage
OUTPUT CHARACTERISTICS
Output Voltage Adjustable Range
Output Voltage Set Point
Line regulation
Load regulation
Output voltage tolerance
Output Voltage Ripple and Noise
Vo=0.7V
Vo=1.2V
Vo=1.8V
Vo=3.3V
Output Current Range(Io.max)
DYNAMIC CHARACTERISTICS
Dynamic Load Response
Vo=0.7V
Vo=1.2V
Vo=1.8V
Vo=3.3V
Setting Time to 1% of Peak
Devitation
EFFICIENCY
Vo=0.7V
Vo=1.2V
Vo=1.8V
Vo=3.3V
EXTERNAL CAPACITANCE
Input Capacitance
Output Capacitance
TURN ON/OFF
Delay time
Output Rise Time
Max.
Units
16
85
150
Vdc
°C
°C
12.8
9.5
120
20
V
A
mA
mA
2.4
-0.3
4
0.8
V
V
0.7
-1
3.3
1
-0.3
-40
-40
With appropriate air flow and derating
8.0
Current sense accuracy
Number of paralleled modules
Current sharing accuracy of
paralleled operation
GENERAL SPECIFICATIONS
MTBF
Weight
DS_ DGQ25A_03122014
12
Vin=9.6V, Vout=3.3V, Io= Io,max
Vin=12V, Vout=3.3V, Io=0A
Module On
Module Off
VIN = 12V, Load = 50%,
VIN = 8V~12.8V
Load =0~25A,
Over all rated input voltage, load, and temperature conditions to end of life
20MHz bandwidth, with 500uF ceramic capacitor
-2
2
V
%Vo.set
Vo,set
%Vo.set
Vo,set
%Vo.set
Vo,set
%Vo.set
0
20
35
35
45
25
mVp-p
mVp-p
mVp-p
mVp-p
A
-15
-9.5
-7
-4.5
15
9.5
7
4.5
30
% Vo,set
% Vo,set
% Vo,set
% Vo,set
µs
81.4
87.2
90.2
93.7
%
%
%
%
±0.6
±1
With 850uF ceramic co, Io slew rate =1A/µs, Io from 25% to 75% to 25% of Io.max
Vin=12V, Io=Io.max
Vin=12V, Io= Io.max
Vin=12V, Io= Io.max
Vin=12V, Io= Io.max
External Input Capacitance is typically 70% Ta and 30% ceramic
External Output Capacitance is typically 100% ceramic, X7R,1206 case or smaller
44
500
Defined as time between enable and Vout rising to 10% of final value
For single module operation
For multiple modules parallel operation
2000
2000
µF
µF
4
60
ms
ms
4
10
ms
ms
% Vo,set
Defined as time between Vout at 10% of final value and Vout at 90% of final value.
For single module operation
For multiple modules parallel operation
Turn-On Over-shoot
Start up tuning signal spec
Duration time(single phase operation)
Duration time(parallel operation)
Tuning signal peak to peak amplitudes
Vo=0.7V
Vo=1.2V
Vo=1.8V
Vo=3.3V
PROTECTION
Input Over Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Output Over Voltage
Output DC Current-Limit Inception
Over-Temperature Shutdown
FEATURE CHARACTERISTICS
Switching Frequency
Typ.
2
The controller need start-up adaptive tuning signal for auto compensation
Time from vo reach to 100% regulation level to the end of the tuning signal
Time from vo reach to 100% regulation level to the end of the tuning signal
signal
Includes switching ripples and steady sate
noise, doesn’t include regulation errors.
signal
11
17
-2.5
-2.5
-2.5
-2
Hiccup mode
ms
ms
2.5
2.5
2.5
2
14
7.0
6.0
Shutdown mode
Hiccup mode
Hiccup mode
7.5
6.5
130
120
120
V
8.0
7.0
600
Io=10A ~25A
Io=0A~10A
Vin=12V,Io=80% of Io,max, Ta=25℃
% Vo,set
% Vo,set
% Vo,set
% Vo,set
-2%
-3.5%
2%
3.5%
4
-10%
+10%
1
7.5
V
V
%Vo.set
% Io.max
°C
kHz
%Io
%Io
%Io
M hours
grams
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P2
.
ELECTRICAL CHARACTERISTICS CURVES(SINGLE MODULE OPERATION)
Figure 1: Converter efficiency vs. output current
(0.7V output voltage)
Figure 2: Converter efficiency vs. output current
(1.2V output voltage)
Figure 3: Converter efficiency vs. output current
(1.8V output voltage)
Figure 4: Converter efficiency vs. output current
(3.3V output voltage)
Figure 5: Output ripple & noise at Vin=12V,Vout=0.7V,
Iout=25A, 2uS/div, 5mV/div.
Figure 6: Output ripple & noise at Vin=12V,Vout=1.2V,
Iout=25A, 2uS/div, 10mV/div.
DS_ DGQ25A_03122014
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Figure 7: Output ripple & noise at Vin=12V,Vout=1.8V,
Iout=25A, 2uS/div, 10mV/div.
Figure 8: Output ripple & noise at Vin=12V,Vout=3.3V,
Iout=25A, 2uS/div, 10mV/div.
Figure 9: Output voltage response to step-change in load
current (25%-75%-25% of full load at Vin=12V Vo=0.7V;
100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic
Cout)
Figure 10: Output voltage response to step-change in load
current (25%-75%-25% of full load at Vin=12V Vo=1.2V;
100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic
Cout)
Figure 11: Output voltage response to step-change in load
current (25%-75%-25% of full load at Vin=12V Vo=1.8V;
100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic
Cout)
Figure 12: Output voltage response to step-change in load
current (25%-75%-25% of full load at Vin=12V Vo=3.3V;
100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic
Cout)
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Figure 13: Turn on by enable at Vin=12V, Vout=0.7V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.2V/div;
Time: 2ms/div.
Figure 15: Turn on by enable at Vin=12V, Vout=1.8V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 2ms/div.
Figure 17: Turn off by enable at Vin=12V, Vout=0.7V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 2ms/div.
DS_ DGQ25A_03122014
Figure 14: Turn on by enable at Vin=12V, Vout=1.2V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 2ms/div.
Figure 16: Turn on by enable at Vin=12V, Vout=3.3V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 2ms/div.
Figure 18: Turn off by enable at Vin=12V, Vout=1.2V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 2ms/div.
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Figure 19: Turn off by enable at Vin=12V, Vout=1.8V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 2ms/div.
DS_ DGQ25A_03122014
Figure 20: Turn off by enable at Vin=12V, Vout=3.3V/25A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 2ms/div.
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ELECTRICAL CHARACTERISTICS CURVES(4 MODULES PARALLEL OPERATION)
Figure 21: Output ripple & noise at Vin=12V,Vout=0.7V,
Iout=100A, 2uS/div, 5mV/div.
Figure 22: Output ripple & noise at Vin=12V,Vout=1.2V,
Iout=100A, 2uS/div, 10mV/div.
Figure 23: Output ripple & noise at Vin=12V,Vout=1.8V,
Iout=100A, 2uS/div, 10mV/div.
Figure 24: Output ripple & noise at Vin=12V,Vout=3.3V,
Iout=100A, 2uS/div, 10mV/div.
Figure 25: Output voltage response to step-change in load
current (25%-75%-25% of 100A load at Vin=12V Vo=0.7V;
50mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic
Cout)
Figure 26: Output voltage response to step-change in load
current (25%-75%-25% of 100A load at Vin=12V Vo=1.2V;
50mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic
Cout)
DS_ DGQ25A_03122014
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Figure 27: Output voltage response to step-change in load
current (25%-75%-25% of 100A load at Vin=12V Vo=1.8V;
100mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic
Cout)
Figure 28: Output voltage response to step-change in load
current (25%-75%-25% of 100A load at Vin=12V Vo=3.3V;
100mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic
Cout)
Figure 29: Turn on by enable at Vin=12V, Vout=0.7V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.2V/div;
Time: 20ms/div.
Figure 30: Turn on by enable at Vin=12V, Vout=1.2V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 20ms/div.
Figure 31: Turn on by enable at Vin=12V, Vout=1.8V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 20ms/div.
Figure 32: Turn on by enable at Vin=12V, Vout=3.3V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 20ms/div.
DS_ DGQ25A_03122014
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Figure 33: Turn off by enable at Vin=12V, Vout=0.7V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 2ms/div.
Figure 34: Turn off by enable at Vin=12V, Vout=1.2V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div;
Time: 2ms/div.
Figure 35: Turn off by enable at Vin=12V, Vout=1.8V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 2ms/div.
Figure 36: Turn off by enable at Vin=12V, Vout=3.3V/100A.
Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div;
Time: 2ms/div.
DS_ DGQ25A_03122014
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P9
DESIGN CONFIGURATIONS
The DGQ25A is designed using single-phase
synchronous buck topology. It is a digital module that can
achieve high efficiency, automatic compensation and fast
transient response .The module has PMBus interface for
system configuration, control and monitoring. The output
of DGQ25A can be adjusted in the range of 0.7Vdc to
3.3Vdc by an external resistor from VSET pin to GND or
through PMBUS command.
The converter can be turned ON/OFF by remote control
signal at ENABLE pin .Positive on/off logic at ENABLE pin
will turn on the module while negative on/off logic will turn
off the module.
FEATURES DESCRIPTIONS
Enable (On/Off)
DGQ25A has positive on/off logic, pulling the pin low will
turn off the unit. With the active high function, the output is
guaranteed to turn on if the ENABLE pin is driven above
2.4V. The output will turn off if the ENABLE pin voltage is
pulled below 0.8V.
The ENABLE input can be driven in a variety of way as
shown in Figures 37.
The converter can protect itself by entering Hiccup mode
against over current, short circuit condition. Also the
module has input OVP and Input UVP function, when
input return to the normal working voltage range, the
module will auto restart up. The converter will shut down
when an Output over voltage protection is detected,
Output OVP is latch mode.
The converter has an over temperature protection which
can protect itself by shutting down for an over
temperature event. There is a typical 25℃ hysteresis for
the OTP.
DGQ25A has multi-phase load-sharing function and up to
4 modules can in parallel operation.
Due to the single-directional communication on SHARE
pin between master and slaves, modules needs to
shutdown and power on/off recycling to restart after faults
(like OCP, OTP)is triggered in multiphase application.
Safety Considerations
It is recommended that the user to provide a very
fast-acting type fuse in the input line for safety. The output
voltage set point and the output current in the application
could define the amperage rating of the fuse.
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the module. An
input capacitance must be placed close to the modules
input pins to filter ripple current and ensure module
stability in the presence of inductive traces that supply
the input voltage to the module.
DS_ DGQ25A_03122014
Figure 37: Enable Input drive circuit
Over-Current and Short-Circuit Protection
The DGQ25A has Hiccup over-current and short circuit
protection function. When over current /short condition
occurs, the module goes into the Hiccup mode. When the
fault condition is removed, the module will restart up.
When in some serious short (much over 200% of Io.max)
condition, the controller may reset due to the input and
ground on the module can be fluctuating drastically when
doing serious short , therefore input power and Enable
signal may need to be recycled to restart up after an
serious short event.
Input Over Voltage Protection (OVP) and UVLO
The DGQ25A has input over voltage protection function.
When input over voltage occurs, the module will shut
down. When the input over voltage condition is removed,
the module will restart up. Also, the converter has UVLO
function at input. When input voltage is below turn-off
threshold, the module will shut down and can restart up
when input voltage is above turn-on threshold.
Output
Over Voltage Protection (OVP)
The converter will shut down when an output over
voltage protection is detected. Once the OVP condition
is detected, controller will latch off and can only restart
up by recycle input voltage or recycle ON/OFF.
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FEATURES DESCRIPTIONS
FEATURES DESCRIPTIONS (CON.)
Over-Temperature Protection
Remote Sense
Single module operation: The over-temperature
protection prevents the module from thermal damage. If
the temperature exceeds the over-temperature threshold
the module will shut down. The module will restart once
the module is cooling down. There is a typical 25℃
hysteresis for the OTP.
The module provides Vo remote sensing to achieve
proper regulation at the load points and reduce effects of
distribution losses on output line. In the event of an open
remote sense line, the module shall maintain local sense
regulation through an internal resistor.
Paralleled operation: Because thermal performances
of all modules are not exactly the same, one of the slave
modules may shut down due to OTP earlier than the
others. Then the left modules may go into OCP Hiccup
mode. Therefore, input power and Enable signal need to
be cycled for paralleled modules to restart up after an
OTP event.
Output Voltage Programming
The output voltage of the DGQ25A can be programmed to
any voltage between 0.7Vdc and 3.3Vdc by connecting
one resistor (shown as Rset in Figure38) between the
Rset pin(+) and GND of the module and the typical
resistor values are shown in Table 1.
Without this external resistor, the output voltage of the
module can be adjusted through PMBUS command.
Output Capacitance
There is no output capacitor on the DGQ25A. Please see
page 2 for suggested minimum output capacitance.
Synchronization
The module can be synchronized by an external clock.
Synchronization is achieved by connecting a clock source
to the SYNC pin. The incoming clock signal must be in the
300kHz to 1MHz range and must be stable.
PMBus Communication
The module has a digital PMBus interface to allow the
module to be monitored, controlled and configured by
the system. The module has 3 PMBus signal lines
SDAT, SCLK, SALERT and 1 Address line Rsel. The
module supports many standard PMBus commands as
listed in the next page.
Paralleling
Figure 38: Adjusting Output Voltage
Vout set
Rset (±1%) kohm
0.7V
11.3~11.7
1.0V
51.7~52.9
1.2V
72.4~74.0
1.5V
79.7~81.5
1.8V
85.7~87.5
2.5V
92.1~94.1
3.3V
99.0~101.0
The module will support multi-phase parallel operation. In
this mode, one device provides the master timing signal to
which the other devices will align.
The maximum number of parallel phases/modules is four.
The current from each phase match within ± 10%.
The SHARE pin signal is for the purpose of
communicating current information between modules.
When the modules in parallel operation, the SHARE pins
and SYNC pins of all modules will be tied together ,
please refer to Figure39 for parallel operation set up.
Table 1: Typical Vout set resistor values
Figure 39: Schematic of modules in parallel operation
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SUPPORTED PMBUS COMMANDS
The main PMBus commands described in the PMBus 1.2 specification are supported by the module. Partial PMBus
commands are fully supported; Partial PMBus commands have difference with the definition in PMBus 1.2
specification. All the supported PMBus commands are detail summarized in below table.
Compatib
le with
Comman
Command
Transfer
Command description
d Code
Data
standard
type
Range Data
Expon
Default value
Format
Note
limit
units
-ent
PMBUS
or not?
Turn the module on or off
OPERATION
0x01
R/W byte
yes
direct
0x40
/
/
/
/
Read byte
yes
direct
0x17
/
/
/
/
Send byte
Yes
direct
/
/
/
/
/
R/W byte
yes
direct
0
/
/
/
/
Send byte
Yes
direct
/
/
/
/
/
by PMBUS command
Configures the
combination of primary
ON_OFF_CONFIG
0x02
on/off pin and PMBUS
command
Clear any fault bits that
CLEAR_FAULTS
0x03
have been set
control writing to the
WRITE_PROTECT
0x10
PMBus devic
Stores operating
STORE_DEFAULT_ALL
0x11
parameters from RAM to
data flash
This command
Restores operating
RESTORE_DEFAULT_ALL
0x12
parameters from data
can't be issued
Write byte
Yes
direct
/
/
/
/
flash to RAM
when the
power unit is
running.
copy the entire contents
of the Operating Memory
STORE_USER_ALL
0x15
to the matching locations
Send byte
yes
direct
/
/
/
/
/
write byte
yes
direct
/
/
/
/
/
Read byte
yes
direct
0xA0
/
/
/
/
Read byte
Yes
0x14
/
/
/
/
1.2
/
Volts
/
/
in the non-volatile User
store memory
copy the entire
contents of the
non-volatile User Store
RESOTRE_USER_ALL
0x16
memory to the matching
locations in the
Operating Memor
determine some key
CAPABILITY
0x19
capabilities of a
PMBus device.
mode+e
VOUT_MODE
0x20
To read Vo data format
xp
VOUT_COMMAND
DS_ DGQ25A_03122014
0x21
Set the output voltage
R/W word
Yes
Vlinear
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apply a fixed offset
voltage to the output
VOUT_TRIM
0x21
R/W word
yes
Linear
0
/
/
/
/
R/W word
yes
Linear
0.012
/
/
/
/
R/W word
yes
linear
5
/
/
/
/
voltage
command value
apply a fixed offset
voltage to the output
VOUT_CAL_OFFSET
0x22
voltage
command value
sets an upper limit on the
output voltage the unit
can
VOUT_MAX
0x23
command regardless of
any other commands or
combinations
VOUT_MARGIN_HIGH
0x25
Set the output voltage
R/W word
Yes
Vlinear
1.3
/
Volts
/
/
VOUT_MARGIN_LOW
0x26
Set the output voltage
R/W word
Yes
Vlinear
1
/
Volts
/
/
R/W word
yes
Linear
0.01
/
/
/
/
R/W word
yes
Linear
0
/
/
/
/
R/W word
yes
Linear
500000
/
/
/
/
sets the rate in mV/μs at
VOUT_TRANSITION_RAT
0x27
which the output should
E
change voltage
sets the rate, in mV/A
at
which the output voltage
VOUT_DROOP
0x28
decreases
with increasing output
current
sets the switching
FREQENCY_SWITCH
0x33
frequency, in kHz,
VIN_ON
should be
Set the turn on voltage
higher than
VIN_ON
0x35
threshold of Vin under
R/W word
Yes
Linear
7.5
/
V
/
VIN_OFF, and
voltage lockout
keep 1V
hystersis.
VIN_ON
should be
Set the turn off voltage
higher than
VIN_OFF
0x36
threshold of Vin under
R/W word
Yes
Linear
6.5
/
V
/
VIN_OFF, and
voltage lockout
keep 1V
hystersis.
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arrange multiple units so
that their switching
INTERLEAVE
0x37
R/W word
yes
Direct
0
/
/
/
/
R/W word
Yes
Linear
0.00029
/
/
/
/
R/W word
Yes
Linear
0
/
/
/
/
R/W word
Yes
Vlinear
1.44
/
V
/
/
Direct
0x80
/
N/A
/
/
periods can be distributed
in time
IOUT_CAL_GAIN
0x38
Used to calibrate DCR
null out any offsets in the
IOUT_CAL_OFFSET
0x39
output current sensing
circuit.
Set the output
VOUT_OV_FAULT_LIMIT
0x40
overvoltage fault
threshold.
Refer to
Instructs what action to
VOUT_OV_FAULT_RESPO
below
0x41
take in response to an
R/W byte
NSE
descriptio
output overvoltage fault.
n;
sets the value of the
output voltage at the
VOUT_UV_FAULT_LIMIT
0x44
sense or output pins that
R/W word
yes
Vlinear
0.1
/
/
/
/
to an output undervoltage R/W byte
yes
direct
0
/
/
/
/
causes an output
undervoltage fault
action to take in response
VOUT_UV_FAULT_RESPO
0x45
NSE
fault
Must be
Set the output
IOUT_OC_FAULT_LIMIT
0x46
overcurrent fault
greater than
R/W word
Yes
Linear
31.5
/
A
/
threshold.
IOUT_OC_WA
RN_LIMIT
value
Refer to
Instructs what action to
IOUT_OC_FAULT_RESPO
below
0x47
take in response to an
R/W byte
NSE
Bit field
0xBF
/
N/A
/
/
descriptio
output overcurrent fault.
n;
Must be
Set the over temperature
OT_FAULT_LIMIT
0x4F
TEMP
R/W word
Yes
fault threshold.
Deg.
120
/
Linear
greater than
/
C
OT_WARN_LI
MIT value
Instructs what action to
OT_FAULT_RESPONSE
0x50
take in response to an
DS_ DGQ25A_03122014
Refer to
R/W byte
Bit field
0XC0
/
N/A
/
/
below
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over temperature fault.
descriptio
n;
Must be less
Set a threshold causing a
TEMP
OT_WARN_LIMIT
0x51
temperature high
R/W word
Yes
Deg.
95
/
Linear
than
/
C
OT_FAULT_LI
warning.
MIT value
Set the input overvoltage
VIN_OV_FAULT_LIMIT
0x55
R/W word
Yes
Linear
14
/
V
/
/
Direct
0XC0
/
N/A
/
/
Linear
5.5
/
/
/
/
direct
0xC0
/
/
/
/
fault threshold.
Refer to
Instructs what action to
VIN_OV_FAULT_RESPON
below
0x56
take in response to an
R/W byte
SE
descriptio
input overvoltage fault.
n;
Refer to
sets the value of the input
below
VIN_UV_FAULT_LIMIT
0x59
voltage that causes input
R/W word
descriptio
undervoltage fault
n;
Refer to
action to take
VIN_UV_FAULT_RESPON
below
0x5A
in response to an input
R/W byte
SE
descriptio
undervoltage fault
n;
Sets the output voltage at
which the bit 3 of
POWER_GOOD_ON
0x5E
R/W word
Yes
Vlinear
1.08
/
V
/
/
R/W word
Yes
Vlinear
0.98
/
V
/
/
R/W word
Yes
Linear
0.004
/
ms
/
/
R/W word
Yes
Linear
0.004
/
ms
/
/
R/W word
Refer to
direct
500
/
/
/
/
STATUS_WORD high
byte should be asserted.
Sets the output voltage at
which the bit 3 of
POWER_GOOD_OFF
0x5F
STATUS_WORD high
byte should be negated.
Sets the time from a start
condition is received until
TON_DELAY
0x60
the output voltage starts
to rise
Sets the time from the
output starts to rise until
TON_RISE
0x61
the voltage has entered
the regulation band.
sets an upper limit, in
TON_MAX_FAULT_LIMIT
0x62
milliseconds, on how
DS_ DGQ25A_03122014
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long the unit can
descriptio
attempt to power up
n
the output without
reaching the output
undervoltage fault limit
instructs the device on
TON_MAX_FAULT_RESP
Refer to
what action to
0x63
ONSE
below
R/W Byte
take in response to a
Direct
0xBF
/
/
/
/
descriptio
TON_MAX fault
n
sets the delay time
between loss of enable
TOFF_DELAY
0x64
condition and the
R/W word
yes
Linear
0
/
/
/
/
R/W word
yes
Linear
0.004
/
/
/
/
Read byte
Yes
Direct
/
/
/
/
/
Read word
Yes
Direct
/
/
/
/
/
Read byte
Yes;
Direct
/
/
/
/
/
Read byte
Yes
Direct
/
/
/
/
/
Read byte
Yes
Direct
/
/
/
/
/
beginning of the output
ramp-down
The TOFF_FALL
command sets the
TOFF_FALL
0x65
ramp-down time from
regulation at
VOUT_COMMAND to 0V
returns one byte of
information with a
STATUS_BYTE
0x78
summary of the
most critical faults
Returns the information
STATUS_WORD
0x79
with a summary of the
module's fault/warning
Returns the information of
the module's output
STATUS_VOUT
0x7A
voltage related
fault/warning
Returns the information of
the module's output
STATUS_IOUT
0x7B
current related
fault/warning
Returns the information of
the module's input over
STATUS_INPUT
0x7C
voltage and under voltage
fault
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Returns the information of
STATUS_TEMPERATURE
0x7D
the module's temperature Read byte
Yes
Direct
/
/
/
/
/
Yes
Direct
/
/
/
/
/
Direct
/
/
/
/
/
related fault/warning
Returns the information of
the module's
STATUS_CML
0x7E
Read byte
communication related
faults.
Refer to
returns one data byte with
below
STATUS_MFR_SPECIFIC
0x80
the status that
Read byte
descriptio
manufacturer defined
n;
Returns the input voltage
READ_VIN
0x88
Read word
Yes
Vlinear
/
/
Volts
/
/
Read word
Yes
Vlinear
/
/
Volts
/
/
Read word
Yes
Linear
/
/
Amps
/
/
Read word
Yes
Linear
/
/
/
/
/
/
of the module
Returns the output
READ_VOUT
0x8B
voltage of the module
Returns the output
READ_IOUT
0x8C
current of the module
report its internal (i.e. die)
READ_TEMPERATURE_1
0x8D
Deg.
temperature
C
report external
temperature as measured
READ_TEMPERATURE_2
0x8E
Deg.
Read word
by an external
Yes
Linear
/
/
diode
C
junction
READ_DUTY_CYCLE
0x94
READ_FREQUENCY
0x95
Read the duty cycle value Read word
yes
Linear
/
/
%
/
/
Read byte
yes
Linear
/
/
MHz
/
/
Read byte
Yes
Direct
0x42
/
/
/
/
Null
/
/
/
/
Null
/
/
/
/
Null
/
/
/
/
Null
/
/
/
/
Read the switching
freqeuncy
Reads the revision of the
PMBUS_REVISION
0x98
PMBus
MFR_ID
0x99
Read write
manufacturer’s ID
ASCII
yes
block
MFR_MODEL
0x9A
manufacturer’s model
string
Read write
ASCII
yes
number
IC_DEVICE_ID
0xAD
block
string
the type or part number of
an IC embedded within a Read write
ASCII
yes
PMBus that is used for
block
string
the PMBus interface
MFR_REVISION
0x9B
manufacturer’s
Read
ASCII
Yes
revision number
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Write
string
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Block
MFR_LOCATION
0x9C
Read
manufacturing location
ASCII
Write
Yes
of the device
Null
/
/
/
/
Null
/
/
/
/
Null
/
/
/
/
Null
/
/
/
/
string
Block
MFR_DATE
0x9D
Read
the date the device was
ASCII
Write
Yes
manufactured.
string
Block
MFR_SERIAL
0x9E
Read
manufacturer’s serial
ASCII
Write
Yes
number of the device
string
Block
IC_DEVICE_REV
0xAE
the type or part number of
an IC embedded within a
Read
ASCII
Yes
PMBus that is used for
Block
string
the PMBus interface
ADAPTIVE_MODE
0xD0
configures the automatic
Read/Writ
tuning features of the
No
Direct
0x024B
/
/
/
/
No
Linear
0.3
/
/
/
/
No
Direct
0
/
/
/
/
No
Direct
0
/
/
/
/
No
Direct
0
/
/
/
/
No
Direct
0
/
/
/
/
No
Direct
0
/
/
/
/
e Word
MAX15301-CCB-CCB
FEEDBACK_EFFORT
0xD3
allows some user
adjustment of the tradeoff
between transient
Read Byte
response, load regulation,
and output noise.
MANUF_CONF
0xE0
allow password-based
Read/Writ
write-protection on a
e Block
per-command basis
MANUF_LOCK
0xE1
contains the password
value for the
Write Word
“manufacturer” PMBus
command security level
MANUF_PASSWD
0xE2
the “key” or
password-attempt
Read/Writ
command used to unlock
e Word
the “manufacturer”
security level
USER_CONF
0xE3
allow password-based
Read/Writ
write-protection on a
e Block
per-command basis
USER_LOCK
DS_ DGQ25A_03122014
0xE4
contains the password
Read
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P18
value for the “user”
Word
PMBus command
security level
USER_PASSWD
0xE5
the “key” or
password-attempt
Read
command used to unlock
Word
No
Direct
0
/
/
/
/
No
Direct
0
/
/
/
/
No
Linear
1.5
/
/
/
/
No
Direct
0
/
/
/
/
No
Linear
/
/
/
/
/
/
/
/
the “user” security level
SECURITY_LEVEL
0xE6
shows the present
security level of password
Read Byte
protection for all writeable
PMBus commands
ZETAP
0xE8
sets the damping ratio for Read/Writ
the closed-loop response
RESTORE_MAXIM_AL
0xEA
L
e Byte
Load contents of the
MAXIM store into working Send Byte
memory
EXT_TEMP_CAL
0xF8
External tempretaure
1.030000e+00,
sense signal calibration
R/W Block
0.0000e+00
gain and offset.
SENSEFET_PARMS
0xF9
Delta Cisco output current
Sense switch, offset and
gain (m, b, mV/A)
DS_ DGQ25A_03122014
1.0000e+000.0
R/W Block
No
Linear
000e+003.000
0e+01
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P19
THERMAL CONSIDERATIONS
THERMAL CURVES
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted on
a test PWB and is vertically positioned within the wind
tunnel. The space between the neighboring PWB and the
top of the power module is constantly kept at 6.35mm
(0.25’’).
Figure 41: * Hot spot temperature measured point.
The allowed maximum hot spot temperature is defined at 115℃.
DGQ25A Output Current vs. Ambient Temperature and Air Velocity
@Vin = 12V, Vout =0.7V (Either Orientation)
Output Current(A)
25
Natural
Convection
20
100LFM
15
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 42: Output current vs. ambient temperature and air
velocity @ Vin=12V, Vout=0.7V (Either Orientation)
DGQ25A Output Current vs. Ambient Temperature and Air Velocity
@Vin = 12V, Vout =1.2V (Either Orientation)
Output Current(A)
25
Figure 40: Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the
module. To enhance system reliability; the power module
should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit may
be affected.
Natural
Convection
20
100LFM
15
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 43: Output current vs. ambient temperature and air
velocity @ Vin=12V, Vout=1.2V (Either Orientation)
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THERMAL CURVES
DGQ25A Output Current vs. Ambient Temperature and Air Velocity
@Vin = 12V, Vout =1.8V (Either Orientation)
Output Current(A)
25
Natural
Convection
20
100LFM
200LFM
15
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 44: Output current vs. ambient temperature and air
velocity @ Vin=12V, Vout=1.8V (Either Orientation)
DGQ25A Output Current vs. Ambient Temperature and Air Velocity
@Vin = 12V, Vout =3.3V (Either Orientation)
Output Current(A)
25
Natural
Convection
20
100LFM
200LFM
300LFM
15
400LFM
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 45: Output current vs. ambient temperature and air
velocity @ Vin=12V, Vout=3.3V (Either Orientation)
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P21
MECHANICAL CONSIDERATIONS
PICK AND PLACE LOCATION
RECOMMENDED PAD LAYOUT
SURFACE MOUNT TAPE & REEL
SPEC. LABEL
SPEC. LABEL
SPEC. LABEL
SPEC. LABEL
SPEC. LABEL
SPEC. LABEL
SPEC. LABEL
SPEC. LABEL
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P22
LEADED (SN/PB) PROCESS RECOMMEND TEMP. PROFILE
Note: The temperature refers to the pin of DGQ25A, measured on the pin +Vout joint.
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
Temp.
Peak Temp. 240 ~ 245 ℃
217℃
Ramp down
max. 4℃/sec.
200℃
Preheat time
100~140 sec.
150℃
Time Limited 90 sec.
above 217℃
Ramp up
max. 3℃/sec.
25℃
Time
Note: The temperature refers to the pin of DGQ25A, measured on the pin +Vout joint.
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MECHANICAL DRAWING
Note:
All pins are copper alloy with Matte Tin plated over Ni under-plating.
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P24
PART NUMBERING SYSTEM
DGQ
12
S
0A0
S
25
P
Product
Series
Input Voltage
Numbers of
Outputs
Output
Voltage
Package Type
Output
Current
On/Off
logic
12- 8.0V ~12.8V
S - Single
0A0 Programmable
25 -25A
P - positive
(Default)
DGQ –
Digital 25A
S - SMD
F
A
Option Code
F- RoHS 6/6
(Lead Free)
A - Standard
function
MODEL LIST
Model Name
Input Voltage
Output Voltage
Output
Current
Total Height
RoHS 6/6
complaint
Efficiency 12Vin, 3.3Vout
@ 100% load
DGQ25A
8.0 ~ 12.8Vdc
0.7V ~ 3.3V
25A
10.2mm(0.4’’)
Yes
93.7%
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Telephone: +31 (0)20 655 09 67
Fax: +31 (0)20 655 09 99
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 x6220~6224
Fax: +886 3 4513485
Email: [email protected]
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available
upon request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by
Delta 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 Delta. Delta reserves the right to
revise these specifications at any time, without notice.
DS_ DGQ25A_03122014
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P25