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Q54SH12050
600W 1/4th Brick DC/DC Power Modules
FEATURES
Electrical
Peak Efficiency up to 97.8%
PMBus Communication
Fully regulated output voltage
Fully protected: Input UVLO and OVP. Output
OVP, OCP and OTP
Monotonic and pre-biased startup
No minimum load required
Parallel Operation with Direct Output Connection
707Vdc isolation
Q54SH12050
Quarter Brick DC/DC Power Module
40~60V in, 11.8V/51A out, 600W
The Q54SH12050 series, quarter brick, 40~60V input, single
output 11.8V, isolated DC/DC converter is the latest offering from a
world leader in power system and technology and manufacturing
Delta Electronics, Inc. This product provides up to 600 watts of power
at 40~60V input in an industry standard footprint and pin out. With
creative design technology and optimization of component placement,
these converters possess outstanding electrical and thermal
performances, as well as extremely high reliability under highly stressful
operating conditions. The Q54SH12050 offers peak 97.8% high
efficiency. The Q54SH12050 is fully protected from abnormal
input/output voltage, current, and temperature conditions and meets
707V isolation. In addition, it can be connected in parallel directly for
higher power without external oring-fet.
Mechanical
With heat spreader size:
58.4 x 36.8 x 15.5mm (2.30”x1.45”x0.61”)
With heat spreader and heat sink size:
58.4 x 36.8 x 26.5mm (2.30”x1.45”x1.04”)
Safety & Reliability
IEC/EN/UL/CSA 62368-1
IEC/EN/UL/CSA 60950-1
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS18001 certified manufacturing facility
SOLDERING METHOD
Wave soldering
Hand soldering
Reflow soldering (MSL of rating 3)
OPTIONS
Negative/Positive Remote on/off
Analog/Digital option
APPLICATIONS
Optical Transport
Data Networking
Communications
Servers
Datasheet
DS_Q54SH12050_11082019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P1

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SPECIFICATION
(TA=25°C, airflow rate=300 LFM, Vin=54Vdc, nominal Vout unless otherwise noted.)
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient
Operating Ambient Temperature
Storage Temperature
Input/output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Input Over-Voltage Protection
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Internal Input Filter
Internal Input Ripple Current
NOTES and CONDITIONS
10mS
Full Load, 40Vin
Vin=54V, Io=0A
Vin=54V
L + C Structure
Min.
Typ.
Max.
0 60
63
-20 85
-55 125
707
40 54
60
39 39.5
37 38
1 1.5
62
15.6
115
15
0.04+20
100
40
39
16
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=54V, Io=Open Load, Tc=25°C
12.16
Vin=54V, Io=Full Load, Tc=25°C
11.76
Output Regulation
Load Regulation
Line Regulation
Temperature Regulation
Total Output Voltage Range
Vin=54V, Io=Io min to Io max
Vin=40V to 60V, Io=0
Ta=-20°C to 85°C
Over sample load, line and temperature
-1
11.6
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, Co=660uF, 1µF ceramic, 10µF tantalum
RMS
Full Load, Co=660uF, 1µF ceramic, 10µF tantalum
Operating Output Current Range
0
Output Over Current Protection(hiccup mode)
Output Over Voltage Protection(hiccup mode)
when Vo<10%Vo.nom
110
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
660µF Tan & 1µF Ceramic load cap, 1A/µs
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time (within 1% nominal Vout)
Turn-On Delay Time
75% Io.max to 50% Io.max
50% Io.max to 75% Io.max
Start-Up Delay Time From Input Voltage
Start-Up Delay Time From On/Off Control
Output Voltage Rise Time
Output Capacitance Range
On/Off=On, from Vin=Turn-on threshold to Vo=10%Vo,nom
Vin=Vin,nom, from On/Off=On to Vo=10% Vo,nom
Vo=10% to 90% Vo,nom
50% ceramic, 50% Oscon or AL
5
0
5
0
EFFICIENCY
Peak Efficiency
65% Load @Vin=54Vdc
Full Load Efficiency
100% Load @Vin=54Vdc
ISOLATION CHARACTERISTICS
Input to Output
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
Vin=40~60V
290
On/Off Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Current
Von/off
Von/off
Ion/off at Von/off=0.0V
2.4
Leakage Current
Logic High, Von/off=15V
10
GENERAL SPECIFICATIONS
MTBF
Io=80% of Io, max; Ta=25°C
2
Weight
With Base-plate
Weight
With heat-spreader and heat-sink
Over-Temperature Shutdown (With Base-plate)
Over-Temperature Shutdown
Refer to Figure 16 for Hot spot 1 location
(54Vin, 80% Io, 200LFM,Airflow from Vin+ to Vin- )
Refer to Figure 18 for Hot spot 2 location
(With 0.5” Height Longitudinal Heat Sink QLL050A)
Over-Temperature Shutdown (NTC Resistor)
(54Vin,80% Io, 200LFM,Airflow from Vout to Vin)
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference.
12.20
11. 80
400
0
85
25
120
13.5
125
125
200
97.8
97.5
80
80g
103g
127
125
130
12.24
11.84
0.4
1
12.4
120
50
51
130
30
10
15
4500
707
1000
0.8
20
0.2
500
Units
Vdc
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
µH+µF
mArms
Vdc
Vdc
mV
%Vo,set
%Vo,set
V
mV
mV
A
%Io,max
V
mV
mV
µs
mS
mS
mS
µF
%
%
Vdc
nF
KHz
V
V
mA
uA
Mhours
grams
grams
°C
°C
°C
Datasheet
DS_Q54SH12050_11082019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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PARAMETER
PMBUS SIGNAL INTERFACE CHARACTERISTICS
Logic Input Low (VIL)
Logic Input High (VIH)
Logic Output Low (VOL)
Logic Output High (VOH)
PMBus Operating Frequency Range
PMBUS MONITORING CHARACTERISTICS
Output Current Reading Accuracy
Output Voltage Reading Accuracy
Input Voltage Reading Accuracy
Temperature Reading Accuracy
SPECIFICATION(CONT.)
NOTES and CONDITIONS
Data, SMBAlert, Clock pin
Data, SMBAlert, Clock pin
Data, SMBAlert, Clock pin; IOL=4mA
Data, SMBAlert, Clock pin; IOH=-4mA
Vin=54V, Io=50% ~ 100% of Io, max;
Vin=54V, Io=5% ~ 50% of Io, max;
Min.
Typ.
Max.
0 0.8
2.4 3.6
0.4
2.5
100/400
-5 +5
-1.5 +1.5
-2 +2
-4 +4
-5 +5
Units
V
V
V
V
KHz
%
A
%
%
PIN DEFINATION
Pin# Name
Function
1 VIN(+) Source input voltage
2 ON/OFF Primary on/off control pin
3 VIN(-) Input return
4 VOUT(-) Negative output voltage
5 VOUT(+) Positive output voltage
6 C2
PGOOD pin, and this pin also could be configured as
secondary on/off control pin
SIMPLIFIED APPLICATION CIRCUIT
Pin# Name
Function
7 Sig_GND Signal ground
8 Data
PMBus data line
9 SMBAlert PMBus SMBAlert line
10 Clock
PMBus clock line
11 Addr1 ADDR1 pin sets the high order digit of the address.
12 Addr0 ADDR0 pin sets the low order digit of the address.
Datasheet
DS_Q54SH12050_11082019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P3

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Ta=25
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. Output Power
Figure 2: Loss vs. Output Power
Figure 3: Output Voltage vs. Output Current showing typical
current limit curves and converter shutdown points. Vin=54V
Datasheet
DS_Q54SH12050_11082019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P4

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TA=25°C,
ELECTRICAL CHARACTERISTICS CURVES
Figure 4: Remote On/Off (negative logic) at full load
Vin=54V, Iout = Io, max
Time: 10ms/div.
Vout (top trace): 4V/div;
Vremote On/Off signal (bottom trace): 2V/div.
Figure 5: Input Voltage Start-up at full load
Vin=54V, Iout = Io, max
Time: 100ms/div.
Vout (top trace): 4V/div;
Vin (bottom trace): 30V/div.
Figure 6: Transient Response
(Vin=54V, 1A/µs step change in load from 50% to 75% of Io, max)
Vout (top trace): 0.2 V/div, 400us/div;
Iout (bottom trace): 20A/div.
Scope measurement should be made using a BNC cable
(length shorter than 20 inches). Position the load between 51
mm to 76 mm (2 inches to 3 inches) from the module
Figure 7: Transient Response
(Vin=54V, 1A/µs step change in load from 75% to 50% of Io, max)
Vout (top trace):0.2V/div, 400us/div;
Iout (bottom trace): 20A/div.
Scope measurement should be made using a BNC cable
(length shorter than 20 inches). Position the load between 51
mm to 76 mm (2 inches to 3 inches) from the module
Datasheet
DS_Q54SH12050_11082019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P5