Technical
S pecification
BQ50120QTA20
42-53V
Input
Output
12V
240Watt
Power
2000Vdc
Isolation
DC Bus Conver ter
Quar ter-brick
Th e B u s Qo r
™
B Q 5 0 1 2 0 Q T A 2 0 b u s c o n v e r t e r i s a n e x t -
generation, board-mountable, isolated, fixed switching
fr eq uen cy d c/d c co nver ter th a t u s es sy nc hr onou s rec tifica tion
t o ac hie ve ext r emel y h ig h co nv er sio n effic ienc y. Th e po w er
d iss ip at e d b y t h e con v ert er is s o l ow t ha t a h ea ts in k is no t
r equ ir ed , w hic h s av es co st , w ei gh t , h eig ht , a n d a p pl ica t ion
effo rt . Th e Bu sQ or se ries pr ov id es a n is ol a te d s te p d ow n
v ol ta g e fr om 48 V t o a 1 2V in t erme dia t e bu s w i th no
r eg ul a tio n in a st a nd a rd “ q ua r te r- br ick ” mo du l e. B us Q or
co nver ters ar e i dea l fo r cu stom ers wh o ne ed mu ltip le ou tp uts
a nd wis h to b u ild or b uy p oin t o f lo ad co nverter s to wo rk with
a 12V rail. RoHS Compliant (see page 12 ).
Operational Features
• Ultra-high efficiency, >96% at full rated load current
• Delivers up to 20 amps (240 Watts) of output current
(power) with minimal derating - no heatsink required
• Input voltage range: 42V – 53V
• Fixed frequency switching provides predictable EMI
performance
Bus
Conver ter
BQ50120QTA20 Module
Pr otection Features
• Input under-voltage lockout and over-voltage
shutdown protects against abnormal input voltages
• Output current limit and short circuit protection
• Output over-voltage protection
• Thermal shutdown
Mechanical Features
• Industry standard quarter-brick bus converter pin-out
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height only 0.43” (10.9mm), permits better airflow
and smaller card pitch
• Total weight: 1.5 oz. (42 grams)
• Flanged pins designed to permit surface mount soldering
(can avoid wave solder) using FPiP technique
Safety Features
•
•
•
•
2000V, 30 MW input-to-output isolation
UL 60950-1:R2011-12
EN60950-1/A12:2011
CAN/CSA-C22.2 No. 60950-1/A1:2011
Contr ol Features
• On/Off control referenced to input side
• Current sharing allowed without the use of any
external circuitry.
Product # BQ50120QTA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ512J Rev. H
11/07/13
Page 1
Technical Specification
MECHANICAL
DIAGRAM
2.30
(58.4)
Input:
Output:
Current:
Package:
42-53 V
12 V
20 A
Quarter-brick
0.14
(3.6)
2.00
(50.8)
0.43
(10.8)
Top View
0.600
(15.24)
1.45
(36.8)
0.600
(15.24)
0.300
(7.62)
Side View
Bottom side
Clearance
See Note 9
0.43
(10.9)
0.060+/-0.030
(1.52+/-0.76)
Lowest
Component
Load Board
Flanged Pin
See Note 10
0.145
(3.68)
See Note 3
NOTES
1) Pins 1-3 are 0.040” (1.02mm) diameter with 0.080”
(2.03 mm) diameter standoff shoulders.
2) Pins 4 and 5 are 0.062” (1.57 mm) diameter with 0.100”
(2.54 mm) 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 (6/6 RoHS) - Matte Tin over Nickel plate
Finish (5/6 RoHS) - Tin/Lead 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: 1.5 oz. (42 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) UL/TUV standards require a clearance of 0.04” (1.02mm)
around primary areas of the module. Refer to section on
Keep Out Areas under Application Considerations for
details.
10) The flanged pins are designed to permit surface mount
soldering (allowing to avoid the wave soldering process)
through the use of the flanged pin-in-paste technique.
Product # BQ50120QTA20
Phone 1-888-567-9596
PIN DESIGNATIONS
Pin No.
1
2
3
4
5
Name
Vin(+)
ON/OFF
Vin(-)
Vout(-)
Vout(+)
Function
Input Positive (42V - 53V)
Logic control input to turn
converter on and off.
Input Negative
Output Negative
Output Positive
www.synqor.com
Doc.# 005-2BQ512J Rev. H
11/07/13
Page 2
Technical Specification
BQ50120QTA20 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input:
Output:
Current:
Package:
42-53 V
12 V
20 A
Quarter-brick
T
A
=25°C, airflow rate=300 LFM, V
in
=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.
Min.
Typ.
Max.
60
56
2000
100
125
12
48
39.5
38.0
1.5
55.0
54.0
7.5
5
75
1\1.5\2
47
12.00
+10 \ 1.2
+4.1 \ 500
+1.7 \ 200
30
15
24.8
8
+10
10
53
Units
V
V
V
°C
°C
V
V
V
V
V
V
V
A
A
mA
A
2
s
mA
mA
A
µF\µH\µF
µF
V
%\V
%\mV
%\mV
V
mV
mV
A
A
V
%
mA
µF
mV
µs
ms
ms
%
%
%
Notes & Conditions
Continuous
Continuous
Basic insulation, Pollution Degree 2
INPUT CHARACTERISTICS
Input Voltage
Non-Operating
Operating
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Input Over-Voltage Shutdown
Turn-Off Voltage Threshold
Turn-On Voltage Threshold
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Input Reflected-Ripple Current
Input Terminal-Ripple Current
Recommended Input Fuse
1
Input Filter Component Values (C\L\C)
Recommended External Input Capacitance
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
2
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Current Share Accuracy (2 units paralleled)
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
100% Load
50% Load
-40
-55
-2
42
6.3
0.17
15
0.01
100
12
Vin when unit will shut down
Vin when unit turns on after shutdown event
100% Load, 42 Vin
I
2
T rating of external fuse should be higher
RMS through 10µH inductor; Figures 12 & 14
RMS, full load; Figures 12 & 13
Fast blow external fuse recommended
Internal values
Typical ESR 0.1-0.2W; see Figure 12
48Vin, no load
Figure 4
Figure 4
Figure 4
Over sample, line, load, temperature & life
20MHz bandwidth; Figures 12 & 15
Full Load; see Figures 12 & 15
Full Load; see Figures 12 & 15
Subject to thermal derating; Figures 5 - 8
Output Voltage 10% Low; Figure 16
% of rated output current
Negative current drawn from output
12Vout at 20A Resistive Load
50% to 75% to 50% Iout max; Figure 11
To within 1% Vout nom
Full load, Vout=90% nom.; Figures 9 & 10
-40°C to +125°C; Figure E
5,000 µF load capacitance, Iout = 0A
Figure 1
Figure 1
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
OUTPUT CHARACTERISTICS
9.7
13.3
60
20
20
0
DYNAMIC CHARACTERISTICS
3,000
200
100
2.5
2
5
96.5
96.3
125
125
125
2000
30
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
ISOLATION CHARACTERISTICS
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
°C
°C
°C
V
M
W
pF
Isolation Voltage (dielectric strength)
3
Isolation Resistance
Isolation Capacitance
4
470
Note 1: Safety product certification tests were carried out using 20A fast blow fuse. Fuse interruption characteristics have to be taken into account
while designing input traces. User should ensure that Input trace is capable of withstanding fault currents until fuse blows.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 3: For modules with isolation voltage rating of 2250V, order the Feature Set option C. See last page for ordering details.
Note 4: Higher values of isolation capacitance can be added external to the module.
Product # BQ50120QTA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ512J Rev. H
11/07/13
Page 3
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
FEATURE CHARACTERISTICS
Input:
Output:
Current:
Package:
42-53 V
12 V
20 A
Quarter-brick
Min.
127.5
-1.0
2.4
2.4
-1.0
Typ.
150
Max.
172
0.8
18
18
0.8
Units
kHz
V
V
V
V
V
°C
°C
Notes & Conditions
Figure B
Figure B
Over full temp range; no load
Average PCB Temperature
See App Note: Output Load Current Calc.
RELIABILITY CHARACTERISTICS
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
13.75
120
10
800
2.7
2.0
10
6
Hrs.
TR-NWT-000332; 100% load,300LFM, 40oC Ta
10
6
Hrs.
MIL-HDBK-217F; 100% load, 300LFM, 40oC Ta
10
6
Hrs. See our website for details
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:R2011-12
Basic insulation
EN60950-1/A12:2011
CAN/CSA-C22.2 No. 60950-1/A1:2011
Note: 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.
QUALIFICATION TESTING
Parameter
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
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x, y and 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, 95% RH, 1000 hours, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
Product # BQ50120QTA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ512J Rev. H
11/07/13
Page 4
Technical Specification
100
98
96
10
9
Input:
Output:
Current:
Package:
42-53 V
12 V
20 A
Quarter-brick
Efficiency (%)
94
92
90
88
86
84
82
80
0
2
4
6
8
10
12
14
16
18
20
42 Vin
48 Vin
52 Vin
Power Dissipation (W)
8
7
6
5
4
3
2
1
0
0
2
4
6
8
10
12
14
16
18
20
42 Vin
48 Vin
52 Vin
Load Current (A)
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:
Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25
°
C.
98
97
96
95
94
93
92
0
100
200
300
400
Air Flow (LFM)
25 C
40 C
55 C
15
14
Output Voltage (V)
13
12
11
10
9
8
0
2
4
6
8
10
12
14
16
18
20
42Vin
48Vin
52Vin
Efficiency (%)
500
Load Current (A)
Figure 3:
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).
20
18
16
14
Figure 4:
Output voltage regulation vs. load current for minimum,
nominal, and maximum input voltage at 25
°
C.
I
out
(A)
12
10
8
6
4
2
0
0
25
40
55
70
85
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)
Ambient Air Temperature (
o
C)
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 5:
Maximum output power derating curves vs. ambient air
temperature for airflow rates of 0 LFM through 400 LFM with air
flowing from pin 3 to pin 1 (nominal input voltage).
Product # BQ50120QTA20
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 20 amp load current (240W)
with 55
°
C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 3 to pin 1 (nominal input voltage).
Doc.# 005-2BQ512J Rev. H
11/07/13
Page 5
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