Huawei GDQ54S12B-4A User manual

GDQ54S12B-4A DC-DC Converter
Technical Manual
Issue 02
Date 2021-09-03
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2021. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specied in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every eort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: https://www.huawei.com
Email: [email protected]
Issue 02 (2021-09-03) Copyright © Huawei Technologies Co., Ltd. i

About This Document
Purpose
This document describes the GDQ54S12B-4A DC-DC converter, including its
electrical specications, features, applications, and communication.
The gures provided in this document are for reference only.
Intended Audience
This document is intended for:
● Sales personnel
● Technical support engineers
● System engineers
● Software engineers
● Hardware engineers
Symbol Conventions
The symbols that may be found in this document are dened as follows.
Symbol Description
Indicates a hazard with a high level of risk which, if not avoided, will
result in death or serious injury.
Indicates a hazard with a medium level of risk which, if not avoided,
could result in death or serious injury.
Indicates a hazard with a low level of risk which, if not avoided, could
result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not avoided, could
result in equipment damage, data loss, performance deterioration, or
unanticipated results.
NOTICE is used to address practices not related to personal injury.
GDQ54S12B-4A DC-DC Converter
Technical Manual About This Document
Issue 02 (2021-09-03) Copyright © Huawei Technologies Co., Ltd. ii

Symbol Description
Supplements the important information in the main text.
NOTE is used to address information not related to personal injury,
equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue
contains all the changes made in earlier issues.
Issue 02 (2021-09-03)
This issue is the second release.
● Added 6.2 Thermal Considerations.
Issue 01 (2021-03-25)
This issue is the rst release.
GDQ54S12B-4A DC-DC Converter
Technical Manual About This Document
Issue 02 (2021-09-03) Copyright © Huawei Technologies Co., Ltd. iii

Contents
About This Document................................................................................................................ ii
1 Safety Information.................................................................................................................. 1
1.1 General Safety.......................................................................................................................................................................... 1
1.2 Personnel Requirements....................................................................................................................................................... 3
1.3 Electrical Safety........................................................................................................................................................................4
2 Product Overview.................................................................................................................... 5
3 Schematic Diagram................................................................................................................. 7
4 Electrical Specications......................................................................................................... 8
4.1 Absolute maximum ratings..................................................................................................................................................8
4.2 Input.............................................................................................................................................................................................8
4.3 Output......................................................................................................................................................................................... 9
4.4 Eciency.................................................................................................................................................................................. 10
4.5 Protection................................................................................................................................................................................ 11
4.6 Dynamic Characteristics..................................................................................................................................................... 12
4.7 Insulation Characteristics................................................................................................................................................... 12
4.8 Other Characteristics........................................................................................................................................................... 13
5 Product Structure Overview............................................................................................... 14
5.1 Dimensions.............................................................................................................................................................................. 14
5.2 Pin Distribution...................................................................................................................................................................... 15
5.3 Pin Application....................................................................................................................................................................... 16
6 Characteristic Curves............................................................................................................ 18
6.1 Eciency and Power Dissipation Curves...................................................................................................................... 18
6.2 Thermal Considerations...................................................................................................................................................... 18
7 Typical Waveforms................................................................................................................ 20
7.1 Turn-on/Turn-o...................................................................................................................................................................21
7.2 Output Voltage Dynamic Response............................................................................................................................... 22
7.3 Output Voltage Ripple........................................................................................................................................................ 23
7.4 Output Voltage Rise Time..................................................................................................................................................23
8 Input Anti-resonance Method............................................................................................ 24
9 Protection Characteristics................................................................................................... 25
GDQ54S12B-4A DC-DC Converter
Technical Manual Contents
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10 Product Packaging, Storage, and Transportation........................................................26
A EMC Specications................................................................................................................28
GDQ54S12B-4A DC-DC Converter
Technical Manual Contents
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1 Safety Information
1.1 General Safety
Statement
Before installing, operating, and maintaining the device, read this document and
observe all the safety instructions on the device and in this document.
The statements in the document do not cover all the safety instructions. They are
only supplements to the safety instructions. Huawei will not be liable for any
consequence caused by the violation of general safety requirements or design,
production, and usage safety standards.
Ensure that the converter is used in environments that meet its design
specications. Otherwise, the converter may become faulty, and the resulting
malfunction, component damage, personal injuries, or property damage are not
covered under the warranty.
Follow local laws and regulations when installing, operating, and maintaining the
converter. The safety instructions in this document are only supplements to local
laws and regulations.
Huawei will not be liable for any consequences of the following circumstances:
● Although the device has passed security and compatibility tests, the radio
frequency and magnetic elds emitted from electronic devices may have a
negative impact on the operation of other electronic devices.The device may
aect normal operation of implanted medical appliances or personal medical
appliances, such as pacemakers, cochlear implants, and hearing aids. If such
appliances are used, consult the appliance manufacturer about the restrictions
for using the device.
● Operation beyond the conditions specied in this document.
● Installation or use in environments which are not specied in relevant
international or national standards.
● Unauthorized modications to the product or software code or removal of the
product.
GDQ54S12B-4A DC-DC Converter
Technical Manual 1 Safety Information
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● Failure to follow the operation instructions and safety precautions on the
product and in this document.
● Equipment damage due to force majeure, such as earthquakes, re, and
storms.
● Damage caused during transportation by the customer.
● Storage conditions that do not meet the requirements specied in this
document.
● Do not drop, squeeze, or pierce the converter. Protect the converter from
external high pressure to prevent internal short circuits and overheating.
● Do not disassemble, ret, or insert foreign objects into the converter. Do not
expose the converter to water or other liquids. Doing so may lead to short
circuits, overheating, re, or electric shocks.
● Use and store the product within the temperature range stipulated in the
specications.
● Do not expose the converter to heat sources such as direct sunlight, radiators,
microwave ovens, ovens, or water heaters.
● If the converter is damaged, cracked, or wet, stop using it. Continuing to use
it may lead to electric shocks, short circuits, or re.
● Dispose of the converter in accordance with local regulations. Do not dispose
of it as normal household waste. Follow local regulations on disposal of the
converter and its accessories. Support proper collection and recycling.
● Keep the converter dry. Do not use the PSU in a dusty or damp place.
Otherwise, the converter may be faulty. Do not splash water on the converter.
Keep the PSU far away from re sources. Do not ignite the converter.
● Do not operate the converter with wet hands. Otherwise, electric shocks may
occur.
GDQ54S12B-4A DC-DC Converter
Technical Manual 1 Safety Information
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General Requirements
D ANGER
● Before performing operations on the converter, power it o to prevent
accidents caused by live-line working.
● Do not alter or repair the converter.
● The voltage inside the converter is high. Do not open it.
● Prevent any foreign objects from entering the shell.
● Do not use the converter in a damp place or in an area where moisture or
condensation may occur.
● Do not touch the converter when it is powered on or just powered o. The hot
surface can cause scalds.
● Only qualied personnel are allowed to install and operate the converter.
● The converter does not contain parts that need to be maintained. The internal
fuse may be disconnected if an internal fault occurs.
● If any damage or fault occurs during installation or operation, power o the
converter immediately and return it to the manufacturer for inspection or
repair.
● Strictly comply with local regulations and ensure that cables are correctly
connected.
● Condensation or frost is not allowed during the use of the converter.
● When the converter is operating, do not use it beyond the ambient
temperature range.
Personal Safety
● Do not alter, disassemble, or remove the shell of the converter.
● If there is a probability of personal injury or converter damage during
operations on the converter, immediately stop the operations, report the case
to the supervisor, and take feasible protective measures.
● Before the installation is completed or conrmed by professionals, do not
power on the converter.
1.2 Personnel Requirements
● Personnel who plan to install, operate or maintain the converter must receive
thorough training, understand all necessary safety precautions, and be able to
correctly perform all operations.
● During the installation, operation, and maintenance of the converter, no
collision or drop is allowed.
● During the secondary assembly of the converter, do not introduce conductive
foreign objects.
GDQ54S12B-4A DC-DC Converter
Technical Manual 1 Safety Information
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1.3 Electrical Safety
Operation Requirements
WARNING
Failure to follow the operating procedures may cause personal injury or even
death.
● Before installing or removing the converter, disconnect the upstream power
supply to the converter.
● Before powering on the converter, ensure that the converter cables are
correctly connected.
● If the converter has multiple inputs, disconnect all the inputs to completely
power it o before operating the converter.
● Only qualied personnel are allowed to perform operations to prevent electric
shocks.
● Before making electrical connections, disconnect the upstream power supply
to the converter if people may contact energized components.
● Do not open, alter, or repair the product as the voltage inside the product is
high.
● To ensure safety, connect the shell ground and the device ground reliably.
When installing the device, install the PE cable rst. When uninstalling the
device, remove the PE cable last.
● Do not operate the converter with wet hands. Otherwise, electric shocks may
occur.
● If any damage or fault occurs during installation or operation, power o the
converter immediately and return it to the manufacturer for inspection or
repair.
● In case of emergency, remove the power plug from the power outlet to
completely cut o the power supply.
ESD
● When installing, operating, and maintaining the converter, comply with the
ESD protection regulations and wear the ESD clothing, gloves, and wrist strap.
● When holding the converter, hold its edge without touching any components.
Do not touch the components with your bare hands.
● Package the removed converter with ESD packaging materials before storing
or transporting it.
GDQ54S12B-4A DC-DC Converter
Technical Manual 1 Safety Information
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2 Product Overview
Features
●Eciency: 95.5% (TA = 25°C; Vin = 36 V,
50% load)
● Length x Width x Height: 57.9 mm x 36.8
mm x 13.4 mm (2.28 in. x 1.45 in. x 0.53 in.)
● Weight: 85 g
● Input undervoltage protection
● Auxilary undervoltage protection
● Output overcurrent protection (hiccup
mode)
● Output short circuit protection (hiccup
mode)
● Output overvoltage protection (hiccup
mode)
● Overtemperature protection (self-recovery)
● Remote on/o
● UL certication
● UL 62368-1, IEC 62368-1, EN 62368-1,
GB4943-1 compliant
● RoHS6 compliant
Product Description
The GDQ54S12B-4A is a new generation
isolated DC-DC converter that uses an industry
standard quarter-brick structure, featuring high
eciency and power density with low output
ripple and noise. It operates from an input
voltage range of 36 V to 75 V, and provides the
rated output voltage of 12 V as well as the
maximum output current of 54 A.
GDQ54S12B-4A DC-DC Converter
Technical Manual 2 Product Overview
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Model Naming Convention Applications
1 — 48 V input, high performance, digital
control, standard quarter-brick
2 — Output current: 54 A
3 — Single output
4 — Output voltage: 12 V
5 — With a baseplate
6 — Pin length: 4.8 mm
7 — Version
Widely used in telecom, industrial, instrument
monitoring, and test equipment applications
GDQ54S12B-4A DC-DC Converter
Technical Manual 2 Product Overview
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3 Schematic Diagram
Figure 3-1 Internal schematic diagram of the converter
GDQ54S12B-4A DC-DC Converter
Technical Manual 3 Schematic Diagram
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4 Electrical Specications
4.1 Absolute maximum ratings
Table 4-1 Absolute maximum ratings
Parameter Min. Typ. Max. Unit Notes & Conditions
Input voltage
● Continuous
● Transient (100 ms)
-
-
-
-
-
-
-
80
100
-
V
V
-
-
-
Operating temperature (TA) –40 - 85 °C -
Storage temperature –55 - 125 °C -
Relative humidity 10 - 95 % RH Non-condensing
External voltage applied to
ON/OFF
- - 12 V -
External voltage applied to
PMBus
- - 3.6 V -
Altitude - - 5000 m -
4.2 Input
Table 4-2 Input specication
Parameter Min. Typ. Max. Unit Notes & Conditions
Operating input voltage 36 48 75 V -
Maximum input current - - 35 A Vin = 0–75 V, Iout = Ionom
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Technical Manual 4 Electrical Specications
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Parameter Min. Typ. Max. Unit Notes & Conditions
No-load loss - 8 11 W Vin = 48 V, Iout = 0 A, TA = 25°C
Input capacitance 440 680 - µF Aluminum electrolytic capacitor
Response to input
transient
- 1.5 2.0 V 0.5 V/µs input transient, Vin =
43–75 V, 100% load
- - 3.0 V 0.5 V/µs input transient, Vin =
36–75 V, 100% load
4.3 Output
Table 4-3 Output specication
Parameter Min. Typ. Max. Unit Notes & Conditions
Output voltage
setpoint
11.88 12.00 12.12 V TA = 25°C, Vin = 48 V, Iout = 50%
Ionom
Output voltage 11.64 - 12.36 V Vin = 43–75 V, Iout = Ionom
9.80 - 12.36 V Vin = 36–43 V, Iout = Ionom (see
Note)
Output current 0 - 54 A -
Output power 0 - 650 W -
Line regulation –0.5 - 0.5 % Vout Vin = 43–75 V; Iout = Ionom
–17 17 % Vout Vin = 36–43 V; Iout = Ionom
Load regulation –3 - 3 % Vout Vin = 48 V; Iout = Iomin – Ionom
Output voltage
regulation precision
–5 - 5 % Vin = 43–75 V; Iout = Iomin – Ionom
–18 - 18 % Vin = 36–43 V; Iout = Iomin – Ionom
Output temperature
coecient
–0.02 - 0.02 %/°C TA = –40°C to +85°C, Vin = 48 V,
Vout = 12 V, Iout = 54 A
Output external
capacitance
660 - 6000 µF SMD aluminum solid capacitor or
chip aluminum capacitor, ESR < 30
mΩ.
Ripple and noise
(peak to peak)
- 180 500 mV Oscilloscope bandwidth: 20 MHz.
Output voltage
overshoot
- - 5 % Full range of Vin, Iout, and TA
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Technical Manual 4 Electrical Specications
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Parameter Min. Typ. Max. Unit Notes & Conditions
Output voltage delay
time
- 50 100 ms From Vin to 10% Vout
Output voltage rise
time
- 50 100 ms Vin = 43–75 V, from 10% Vout to
90% Vout, see 7.4 Output Voltage
Rise Time.
Switching frequency - 180 - kHz -
NO TE
● The relation curve of the Vin = 36–43 V and Vout (steady state).
4.4 Eciency
Table 4-4 Eciency specication
Parameter Min. Typ. Max. Unit Notes & Conditions
100% load 93.5 94.5 - % TA = 25°C, Vin = 48 V
50% load 94 95 - %
20% load 92 94 - %
100% load 92 94 - % TA = 25°C, Vin = 36 V
50% load 94.5 95.5 - %
100% load 92 94 - % TA = 25°C, Vin = 75 V
50% load 93 94 - %
GDQ54S12B-4A DC-DC Converter
Technical Manual 4 Electrical Specications
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4.5 Protection
Table 4-5 Input Protection
Parameter Min. Typ. Max. Unit Notes &
Conditions
Input undervoltage protection
Startup threshold
Shutdown threshold
Hysteresis
-
32
30
1
-
34
32
2
-
36
34
3
-
V
V
V
-
-
-
-
Auxiliary input undervoltage protection
Startup threshold
Shutdown threshold
Hysteresis
-
25.5
22.5
0.7
-
28.0
26.0
1.9
-
31.5
29.5
3.0
-
V
V
V
-
-
-
-
Table 4-6 Output Protection
Parameter Min. Typ. Max. Unit Notes & Conditions
Output overcurrent
protection
82.5 - 105 A Hiccup mode
Output short circuit
protection
- - - - Hiccup mode, and system reports
OVP protection
Short circuit impedance is not less
than 100 milliohms.
Output overvoltage
protection
13.2 - 16 V Hiccup mode, and system reports
OVP protection
Overtemperature
protection threshold
105 120 130 °C Self-recovery; the overtemperature
protection hysteresis is obtained
by measuring the temperature of
the PCB near the temperature
sensor.
Overtemperature
protection hysteresis
5 - - °C
GDQ54S12B-4A DC-DC Converter
Technical Manual 4 Electrical Specications
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4.6 Dynamic Characteristics
Table 4-7 Dynamic characteristics
Parameter Min. Typ. Max. Unit Notes & Conditions
Overshoot amplitude - - 600 mV Vin = 43–75 V, current change rate:
0.1 A/µs, T = 5 ms, load: 25%–
50%–25%; 50%–75%–50%
Overshoot recovery time - - 200 µs
Overshoot amplitude - - 1200 mV Vin = 43–75 V, current change rate:
1 A/µs, T = 5 ms, load: 25%–50%–
25%; 50%–75%–50% (additional
1000 µF load capacitor)
Overshoot recovery time - - 500 µs
NO TE
Larger than 80% load step, there is no special standard.
4.7 Insulation Characteristics
Table 4-8 Insulation characteristics
Parameter Min. Typ. Max. Unit Notes & Conditions
Input to output insulation
voltage
- - 1500 V DC Basic insulation, leakage current <
1 mA, altitude = 3000 m, without
arc or breakdown
Input to baseplate
insulation voltage
- - 750 V DC
Output to baseplate
insulation voltage
- - 750 V DC
Input to output insulation
voltage
- - 1500 V DC Functional insulation, leakage
current < 1 mA, altitude = 5000 m,
without arc or breakdown
Input to baseplate
insulation voltage
- - 750 V DC
Output to baseplate
insulation voltage
- - 750 V DC
GDQ54S12B-4A DC-DC Converter
Technical Manual 4 Electrical Specications
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4.8 Other Characteristics
Table 4-9 Other characteristics
Parameter Min. Typ. Max. Unit Notes & Conditions
Remote On/O voltage low
level
–0.7 - 1.2 V Negative logic
Remote On/O voltage
high level
3.5 - 12 V
On/O current low level - - 1 mA -
On/O current high level - - - µA
Mean time between
failures (MTBF)
- 2.5 - Million
hours
Telcordia, SR332 Method 1 Case
3; 80% load, normal input/rated
output; 300 LFM; TA = 40°C.
GDQ54S12B-4A DC-DC Converter
Technical Manual 4 Electrical Specications
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5 Product Structure Overview
5.1 Dimensions
Figure 5-1 Dimensions
GDQ54S12B-4A DC-DC Converter
Technical Manual 5 Product Structure Overview
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