Y
AR
N
IMI
L
RE
P
35-55V
Input
Technical
S pecification
BQ55090ETL16
Eighth-brick
DC Bus Conver ter
9.6V
Output
150Watt
Power
2000Vdc
Isolation
The BusQor
™
BQ55090ETL16 bus converter is a next-gener-
g
ation, board-mountable, isolated, fixed switching frequency
m
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 BusQor
series provides an isolated step down voltage from 48V to a
9.6V intermediate bus with no regulation in a standard
“eighth-brick” module. BusQor converters are ideal for creat-
b
ing the mid-bus voltage required to drive point-of-lload (non-iso-
b
o
i
lated) converters in intermediate bus architectures.
Bus
Conver ter
Operational Features
• Ultra-high efficiency, >95% at full rated load current
• Delivers up to 16 amps of output current (150W) with
minimal derating - no heatsink required
• Input voltage range: 35V – 55V provides 6.3-11V bus
for distributed power architectures
• Fixed frequency switching provides predictable EMI per-
formance
BQ55090ETL16 Module
Pr otection Features
• Input under-voltage lockout and over-voltage shutdown
protects against abnormal input voltages
• Output current limit and short circuit protection (auto
recovery or latching options)
• Output over-voltage protection
• Thermal shutdown (auto recovery or latching options)
Mechanical Features
• Industry standard eighth-brick bus converter pin-out
• Industry standard size: 0.90” x 2.3” (22.9x58.4mm)
• Total height only 0.327” (8.05mm), permits better air-
flow and smaller card pitch
• Total weight: 0.7 oz. (20 grams)
• Flanged pins designed to permit surface mount solder-
ing (avoid wave solder) using FPiP technique
Safety Features
• 2000V, 30 MΩ input-to-output isolation
• UL/cUL 60950 recognized (US & Canada), basic insu-
lation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Contr ol Features
• On/Off control referenced to input side (positive and
negative logic options available)
Product # BQ55090ETL16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BE559B Rev. 7
11/10/04
Page 1
Technical Specification
MECHANICAL
DIAGRAM
0.150
(3.81)
Input:
Output:
Current:
Package:
35-55 V
9.6 V
16 A
(150W)
Eighth-brick
0.600
(15.24)
0.300
Top View
(7.62)
0.600
(15.24)
0.900
(22.86)
0.140
(3.56)
2.000
(50.8)
2.300
(58.42)
0.327+/-0.017
(8.31+/-0.43)
Side View
Bottom side
Clearance
See Note 9
Lowest
Component
0.019+/-0.016
(0.48+/-0.4)
Load Board
Flanged Pin
See Note 10
0.180
(4.57)
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 - 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: 0.7 oz. (20 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
soldeing (avoiding the wave soldering process) through
the use of the flanged pin-in-paste technique.
Product # BQ55090ETL16
Phone 1-888-567-9596
PIN DESIGNATIONS
Pin No.
1
2
3
4
5
Name
Vin(+)
ON/OFF
Vin(-)
Vout(-)
Vout(+)
Function
Input Positive (35V - 55V)
Logic control input to turn
converter on and off.
Input Negative
Output Negative
Output Positive
www.synqor.com
Doc.# 005-2BE559B Rev. 7
11/10/04
Page 2
Technical Specification
BQ55090ETL16 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input:
Output:
Current:
Package:
35-55 V
9.6 V
16 A
(150W)
Eighth-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 tem-
perature with appropriate power derating. Specifications subject to change without notice.
Min.
Typ.
Max.
60
56
2000
100
125
18
48
32.0
30.5
1.5
58.0
56.5
15
5
50
3.3\2.2
47
9.60
+20 \ 2.4
+4.1 \ 500-
+1.7 \ 200
100
20
20
0
+10
10
55
Units
V
V
V
°C
°C
V
V
V
V
V
V
V
A
A
mA
A
2
s
mA
mA
A
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 Voltage
Non-Operating
Operating
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
-40
-55
-2
35
INPUT CHARACTERISTICS
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
Input Filter Component Values (L\C)
Recommended External Input Capacitance
4.7
0.12
30
0.1
100
12
100% Load, 35 Vin
RMS through 10µH inductor; Figures 12 & 14
RMS, full load; Figures 12 & 13
fast blow external fuse recommended
internal values
Typical ESR 0.1-0.2Ω, see Figure 12
48Vin, no load
Figure 4
Figure 4
Figure 4
over sample, line, load, temperature & life
20MHz bandwidth; Fig. 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
9.6Vout at 16A 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
2,500 µF load capacitance, Iout = 0A
Figures 1-3
Figures 1-3
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
1
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
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance
2
6.3
11.0
120
40
16
0
2,500
DYNAMIC CHARACTERISTICS
150
200
1
40
0
95.5
95.0
125
125
125
2000
30
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
°C
°C
°C
V
M
Ω
pF
ISOLATION CHARACTERISTICS
470
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # BQ55090ETL16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BE559B Rev. 7
11/10/04
Page 3
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
FEATURE CHARACTERISTICS
Input:
Output:
Current:
Package:
35-55 V
9.6 V
16 A
(150W)
Eighth-brick
Min.
180
-1.0
2.4
2.4
-1.0
Typ.
200
Max.
230
0.8
18
18
0.8
Units
kHz
V
V
V
V
V
kΩ
V
°C
°C
Notes & Conditions
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
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
140
10
30
11.6
10
1000
TBD
TBD
Figures A, B
Over full temp range; no load
Average PCB Temperature
See App Note: Output Load Current Calc.
150
RELIABILITY CHARACTERISTICS
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 website for latest values
STANDARDS COMPLIANCE
Parameter
P
STANDARDS COMPLIANCE
Notes
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
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
UL/cUL 60950
EN60950
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
• 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
P
QUALIFICATION TESTING
# Units
32
5
5
10
5
5
5
3
Test Conditions
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
95% rated V
in
and load, units at derating point, 1000 hours
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
T
operating
= min to max, V
in
= min to max, full load, 100 cycles
T
min
-10°C to T
max
+10°C, 5°C steps, V
in
= 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.
OPTIONS
SynQor provides various options for Logic Sense, Pin Length and
Feature Set for this family of DC/DC converters. Please consult the
SynQor website (www.synqor.com) for information on available
options.
Product # BQ55090ETL16
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not lim-
ited to U.S. Patent numbers 5,999,417; 6,222,742 B1;
6,594,159 B2; 6,545,890 B2.
www.synqor.com
Doc.# 005-2BE559B Rev. 7
11/10/04
Page 4
Technical Specification
100
95
9
8
Input:
Output:
Current:
Package:
35-55 V
9.6 V
16 A
(150W)
Eighth-brick
Power Dissipation (W)
7
6
5
4
3
2
1
0
Efficiency (%)
90
85
80
35 Vin
75
70
0
2
4
6
8
10
12
14
16
18
20
48 Vin
55 Vin
35 Vin
48 Vin
55 Vin
0
2
4
6
8
10
12
14
16
18
20
Load Current (A)
Load Current (A)
Figure 1:
Efficiency at nominal output voltage vs. load current for min-
imum, 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
Efficiency (%)
12
11
Output Voltage
(V)
10
9
8
7
6
5
4
0
2
4
6
8
10
12
14
16
18
20
22
Load Current
(A)
35V
48V
55V
96
95
94
93
92
0
100
200
300
400
500
Air Flow (LFM)
25 C
40 C
55 C
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).
16
14
12
10
Figure 4:
Output voltage regulation vs. load current for minimum, nom-
inal, and maximum input voltage at 25
°
C.
I
out
(A)
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)
50 LFM (0.25 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
Ambient Air Temperature (
o
C)
Figure 5:
Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 50 LFM through 400 LFM with air flowing
from pin 3 to pin 1 (nominal input voltage).
Product # BQ55090ETL16
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 16 amp load current (150W)
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.# 005-2BE559B Rev. 7
11/10/04
Page 5
www.synqor.com
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