BQ60120HEB25NNS [SYNQOR]
Half-brick DC/DC Converter; 半砖DC / DC转换器
| 型号： | BQ60120HEB25NNS |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | Half-brick DC/DC Converter |
| 文件： | 总13页 (文件大小：606K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Technical
Specification
BQ60120HEA30
35-75V
12V
Output
360Watt 2250Vdc
Half-brick
DC/DC Converter
Input
Power
Isolation
™
The BQ60120HEA30 BusQor Exa series converter is a
next-generation, board-mountable, isolated, wide input, reg-
ulated, fixed switching frequency DC/DC converter that uses
synchronous rectification to achieve extremely high conver-
sion efficiency. The BusQor Exa series provides an isolated
step down voltage from 35-75V to 12V with tight output volt-
age regulation in a standard “half-brick” module and is avail-
able in oopen-frame and baseplated version. BusQor con-
verters are ideal for customers who need multiple outtputs and
wish to use point of load converters to work with a 12V rail.
The BusQor Exa series convertters offer industry-leading use-
able output current for powering intermediate bus architech-
ture systems. RoHS 5/6 compliant (see page 12).
Bus
Converter
BQ60120HEA30 Module
Operational Features
• Ultra-high efficiency, 95% at full rated load current
Protection Features
• Delivers up to 360 Watts of output power, subject to
derating over temperature and airflow
• Input under-voltage lockout
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient withstand capability
• Output current limit and short circuit protection
• Output over-voltage protection
• Thermal shutdown
• Fixed frequency switching provides predictable EMI
performance
• Backdrive protection prevents excessive negative current
flow
Mechanical Features
• Industry standard half-brick pin-out configuration
• Industry standard size: 2.3” x 2.4” (58.4 x 61mm)
Control Features
• Total height 0.45” (11.5mm), permits better airflow and
• On/Off control referenced to input side (positive and
negative logic options are available)
smaller card pitch (0.54” baseplated module)
• Total weight: 2.6 oz. (75 grams) for open-frame
• Remote sense for the output voltage compensates for
output distribution drops
• Output voltage trim down to 6.0V permits custom volt-
ages and voltage margining (+5%/-50%)
Safety Features
• Short startup inhibit time
• 2250V, 30 MΩ input-to-output isolation
• UL/cUL 60950-1 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 1
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
MECHANICAL DIAGRAM
Open-Frame Version
1.90
(48.2)
1.400
(35.56)
0.31
(8.0)
1.55
(39.3)
1.000
(25.40)
0.85
(21.5)
0.700
(17.78)
0.400
(10.16)
0.50
(12.6)
0.11
(2.9)
2.30
(58.4)
Bottom View
Top View
1.90
(48.3)
Each exposed copper staple connected
to adjacent pin 5 and 9. See Note 7
0.400
(10.16)
0.422 + 0.030
(10.72 + 0.76)
0.50
(12.7)
0.19
(4.8)
1.400
(35.56)
2.40
(61.0)
Side View
Lowest
Component
0.010+/-0.009
(0.25+/-0.22)
Customer Board
0.145
(3.68)
See Note 3
NOTES
Bottom side
Clearance
See Note 10
1) Pins 1, 2, 4, 6-8 are 0.040” (1.02mm) diameter with 0.080”
(2.03mm) diameter standoff shoulders.
2) Pins 5 and 9 are 0.080” (2.03 mm) diameter shoulderless pins.
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
PIN DESIGNATIONS
Pin No. Name
Function
Finish - Tin/Lead over Nickel plate
1
2
Vin(+)
ON/OFF
Positive input voltage
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
Negative input voltage
Negative output voltage
Return remote sense
Output voltage trim
Positive remote sense
Positive output voltage
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) Same net copper planes recommended on customer board in designated
areas adjacent to pins 5 and 9, as worst case bottom side clearance
could cause exposed copper staple to touch customer board surface.
8) Weight: 2.6 oz. (75g) typical
9) Workmanship: Meets or exceeds IPC-A-610C Class II
10) UL/TUV standards require a clearance greater than 0.04”
(1.02mm) between input and output for Basic insulation. This issue
should be considered if any copper traces are on the top side of
the user’s board. Note that the ferrite cores are considered part of
the input/primary circuit.
4
5
6
7
8
9
Vin(-)
Vout(-)
SENSE(-)
TRIM
SENSE(+)
Vout(+)
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 2
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
MECHANICAL DIAGRAM
Baseplated Version
2.40
(61.0)
1.400
(35.56)
Bottom View
Bottom view is identical to open-
frame version shown on Page 2.
1.000
(25.40)
M3 Threaded Insert
4 Places
See Note 1 & 2
0.700
(17.78)
0.400
(10.16)
0.300
(7.62)
0.506 + 0.030
(12.85 + 0.76)
Side View
2.30
(58.4)
0.20
(5.1)
Top View
1.90
(48.3)
1.90
(48.3)
Lowest
Component
0.19
(4.8)
0.010 +.009
(.25 +.22)
Customer Board
0.145
(3.68)
See Note 6
Bottom side
Clearance
0.50
(12.7)
Pin farside
typical
0.400
(10.16)
0.20
(5.1)
1.400
(35.56)
2.000
(50.80)
NOTES
PIN DESIGNATIONS
Pin connections are identical to open-frame version
shown on Page 2. Use “B” as 10th letter in part
number for baseplated version (see ordering page).
1) M3 screws used to bolt unit’s baseplate to other surfaces (such
as heatsink) must not exceed 0.100” (2.54 mm) depth below
the surface of the baseplate.
2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm)
3) Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface
4) Pins 1, 2, 4, 6-8, are 0.040” (1.02mm) diameter with 0.080”
(2.03mm) diameter standoff shoulders
5) Pins 5, 9 are 0.080” (2.03mm) diameter shoulderless pins.
6) Other pin extension lengths available
7) All Pins: Material - Copper Alloy
Finish - Tin/Lead over Nickel plate
8) Undimensioned components are shown for visual
reference only.
9) Weight: 4.3 oz. (123 g) typical
10) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
11) Workmanship: Meets or exceeds IPC-A-610C Class II
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 3
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
BQ60120HEA30 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=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.
Parameter
Min.
Typ.
Max.
Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
100
80
V
V
Continuous
Operating
Continuous
Operating Transient Protection
100
2250
100
125
V
100ms transient, square wave
Basic insulation level, Pollution degree 2
See Figures 7 - 10 for derating
Isolation Voltage (input to output)
Operating Temperature
V
-40
-55
°C
°C
Storage Temperature
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
35
48
75
V
31.5
29.5
33.5
30.5
3.0
34.4
32.4
V
V
V
11.6
180
50
A
100% Load, 35 Vin, trimmed up 5%
No-Load Input Current
140
30
mA
mA
mA
mA
A
Disabled Input Current
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
20
40
RMS thru inductor; Figures 15 & 17
RMS; Figures 15 & 16
130
20
Fast blow external fuse recommended
Input Filter Component Values (C1\L\C2)
Output Filter Component Values (Lout\Cout)
Recommended External Input Capacitance
Recommended External Input Capacitor ESR1
OUTPUT CHARACTERISTICS
Output Voltage Set Point
0\1.0\5.0
100\90
100
µF\µH\µF Internal values; see Figure D
nH\µF Internal values; see Figure D
100
µF
Typical ESR 0.2Ω; see Figure 15
0.04
0.2
1.5
Ω
100kHz, -40°C to 100°C
11.88
12.00
12.12
V
Output Voltage Regulation
Over Line
+
+
+
+
0.05 \ 6
0.1 \ 12
0.1 \ 12
0.2 \ 24
%\mV
%\mV
mV
Over Load
+
+
90
Over Temperature
45
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
11.75
12.33
V
Over sample, line, load, temperature & life
44µF local ceramic, Figures 15 & 18
Full Load; Figures 15 & 18
60
120
40
mV
mV
A
RMS
20
Full Load; Figures 15 & 18
Operating Output Current Range
Output DC Current-Limit Inception
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Start-up Output Voltage Overshoot (with max. cap.)
Recommended External Output Capacitance
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (5A/µs)
Settling Time
0
30
Subject to thermal derating; Figures 7 - 10
Output Voltage 10% Low; Figure 19
Negative current drawn from output
Negative current drawn from output
12Vout at 30A resistive load
34
0.8
37
1.8
0.3
40
A
3.2
0.6
A
A
>10,000
µF
%
0
10,000µF, Iout=30A resistive load
Local ceramic
44
µF
80
dB
120 Hz; Figure 22
300
500
100
mV
mV
µs
50% to 75% to 50% Iout max; Figure 13
50% to 75% to 50% Iout max; Figure 14
To within 1% Vout nom
Turn-On Transient
Turn-On Time
8
2
14
3
20
4
ms
ms
Full load, Vout=90% nom.; Figures 11 & 12
Start-Up Inhibit Period
EFFICIENCY
100% Load
95
95
%
%
Figures 1 - 6
Figures 1 - 6
50% Load
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
125
125
125
100
°C
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 7 - 10 for derating curves
Applies to BQ60120HEB30 only
Transformer Temperature
Maximum Baseplate Temperature Limit
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
2250
30
V
M
Ω
Isolation Capacitance
1000
pF
1. Electrolytic capacitor ESR tends to increase dramatically at low temperature.
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 4
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency Regulation Stage
Switching Frequency Isolation Stage
ON/OFF Control (Option P)
Off-State Voltage
270
135
300
150
330
165
kHz
kHz
Synchronous to regulation stage
-2
0.8
18
V
V
On-State Voltage
3.5
ON/OFF Control (Option N)
Off-State Voltage
2.7
-2
18
V
V
On-State Voltage
0.8
ON/OFF Control (Either Option)
Pull-Up Voltage
Figure A
4.5
5
6
V
Pull-Up Resistance
10
k
Ω
Output Voltage Trim Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-50
+5
%
Measured across Pins 9 & 5; Figure B
Over full temp range; % of nominal Vout
Average PCB Temperature
113
118
120
10
123
%
°C
°C
600
See App Note: Output Load Current Calc.
o
1.9
1.4
106 Hrs. TR-NWT-000332; 80% load,300LFM, 40 C T
a
a
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40 C T
o
106 Hrs. See our website for details
STANDARDS COMPLIANCE
Parameter
P
Notes
STANDARDS COMPLIANCE
UL/cUL 60950-1
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
EN60950-1
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
GR-1089-CORE
Section 7 - electrical safety, Section 9 - bonding/grounding
Telcordia (Bellcore) GR-513
•
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
# Units Test Conditions
QUALIFICATION TESTING
Life Test
32
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
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
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, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
5
10
5
5
5
Solderability
15 pins
•
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
PATENTS
SynQor provides various options for Logic Sense, Pin Length and SynQor is protected under various patents, including but not lim-
Feature Set for this family of DC/DC converters. Please consult the ited to U.S. Patent # 5,999,417; 6,222,742 B1; 6,594,159
last page of this specification sheet for information on available B2; 6,545,890 B2.
options.
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 5
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
100
95
90
85
80
75
70
22
20
18
16
14
12
10
8
6
35 Vin
48 Vin
75 Vin
35 Vin
48 Vin
75 Vin
4
2
0
0
3
6
9
12
15
18
21
24
27
30
0
3
6
9
12
15
18
21
24
27
30
Load Current (A)
Load Current (A)
Figure 1: Efficiency at nominal 12V output vs. load current for mini-
Figure 2: Power dissipation at nominal 12V output vs. load current for
mum, nominal, and maximum input voltage at 25
°C.
minimum, nominal, and maximum input voltage at 25°C.
100
95
90
85
80
75
70
22
20
18
16
14
12
10
8
6
35 Vin
48 Vin
75 Vin
35 Vin
48 Vin
75 Vin
4
2
0
0
3
6
9
12
15
18
21
24
27
30
0
3
6
9
12
15
18
21
24
27
30
Load Current (A)
Load Current (A)
Figure 3: Efficiency at trimmed-down 9.0V output vs. load current for
Figure 4: Power dissipation at trimmed-down 9.0V output vs. load cur-
minimum, nominal, and maximum input voltage at 25
°C.
rent for minimum, nominal, and maximum input voltage at 25°C.
100
95
90
85
80
75
70
22
20
18
16
14
12
10
8
6
35 Vin
48 Vin
75 Vin
35 Vin
48 Vin
75 Vin
4
2
0
0
3
6
9
12
15
18
21
24
27
30
0
3
6
9
12
15
18
21
24
27
30
Load Current (A)
Load Current (A)
Figure 5: Efficiency at trimmed-down 6.0V output vs. load current for
minimum, nominal, and maximum input voltage at 25 C.
Figure 6: Power dissipation at trimmed-down 6.0V output vs. load cur-
rent for minimum, nominal, and maximum input voltage at 25 C.
°
°
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 6
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
30
25
20
15
cfmpatrue
10
5
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Cofsur
°
twih1n
dSjconpmatuersi
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 7: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 100 LFM through 400 LFM with air flow-
ing from input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 25 amp load current (300W)
with 55 C air flowing at the rate of 200 LFM. Air is flowing across the
converter from input to output (nominal input voltage).
°
30
25
20
15
cfmpatrue
10
5
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Cofsur
°
twih1n
dSjconpmatuersi
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 9: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 100 LFM through 400 LFM with air flow-
ing from pin 1 to pin 4 (nominal input voltage).
Figure 10: Thermal plot of converter at 24.5 amp load current (294W)
with 55 C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 1 to pin 4 (nominal input voltage).
°
Figure 11: Turn-on transient at full load (resistive load) (10 ms/div).
Input voltage pre-applied. Top Trace: Vout (5V/div). Bottom Trace:
ON/OFF input (5V/div)
Figure 12: Turn-on transient at zero load (10 ms/div). Top Trace: Vout
(5V/div). Bottom Trace: ON/OFF input (5V/div).
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 7
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
Figure 13: Output voltage response to step-change in load current (50%-
Figure 14: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max): dI/dt = 5A/ s). Load cap: 470 F, 15 m ESR tantalum cap
and 47 F ceramic cap. Top trace: Vout (500mV/div), Bottom trace: Iout (10A/div).
75%-50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 47
µF ceramic cap.
µ
µ
Ω
Top trace: Vout (500mV/div), Bottom trace: Iout (10A/div).
µ
See Fig. 17
4.7 µH
See Fig. 16
source
impedance
See Fig. 18
iS
iC
DC/DC
Converter
VOUT
VSOURCE
100 µF,
2x22 µF
local ceramic
capacitance
ESR≅0.2
Ω
electrolytic
capacitor
1
µ
F ceramic,
15
µF tantalum
Figure 15: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 16), Input Reflected Ripple Current
(Figure 17) and Output Voltage Ripple (Figure 18).
Figure 16: Input Terminal Ripple Current, i , at full rated output cur-
c
rent and nominal input voltage with 4.7
µH source impedance and
100 F electrolytic capacitor (100 mA/div). (See Figure 15)
µ
Figure 17: Input reflected ripple current, i , through a 4.7
inductor at nominal input voltage and rated load current (10 mA/div).
(See Figure 15)
µ
H source
Figure 18: Output voltage ripple at nominal input voltage and rated
s
load current (20 mV/div). Load capacitance: 2x22
Bandwidth: 500 MHz. (See Figure 15)
µF ceramic capacitor.
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 8
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
16
OVP Shutdown
14
12
10
8
6
4
35 - 75 Vin
2
0
-5
0
5
10
15
20
25
30
35
40
45
Load Current (A)
Figure 19: Output voltage vs. load current showing typical current limit
Figure 20: Load current (10A/div) as a function of time when the con-
curves and OVP shutdown point.
verter attempts to turn on into a 1 m
Ω
short circuit.
1
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
0.1
35 Vin
35 Vin
48 Vin
75 Vin
0.01
48 Vin
75 Vin
0.001
0.0001
100
1,000
10,000
100,000
100
1,000
10,000
100,000
Hz
Hz
Figure 21: Magnitude of incremental output impedance (Z
=
Figure 22: Magnitude of incremental forward transmission (FT =
v /v ) for minimum, nominal, and maximum input voltage at full
out in
rated power.
out
v
/i ) for minimum, nominal, and maximum input voltage at full
out out
rated power.
20
10
100
10
1
0
35 Vin
48 Vin
75 Vin
35 Vin
48 Vin
75 Vin
-10
-20
-30
0.1
-40
0.01
100
100
1,000
10,000
100,000
1,000
10,000
100,000
Hz
Hz
Figure 23: Magnitude of incremental reverse transmission (RT =
/i ) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 24: Magnitude of incremental input impedance (Z = v /i )
in in in
for minimum, nominal, and maximum input voltage at full rated power.
i
in out
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 9
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The BusQor Exa series converter uses a two-stage power conver-
sion topology. The first stage keeps the output voltage constant
over variations in line, load, and temperature. The second stage
uses a transformer to provide the functions of input/output isola-
tion and voltage step-down to achieve the low output voltage
required.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). There are
two versions of the converter that differ by the sense of the logic
used for the ON/OFF input.
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on). Figure A details five possible circuits for
driving the ON/OFF pin.
Both the first stage and the second stage switch at a fixed fre-
quency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state resis-
tance, dissipate far less energy than Schottky diodes. This is the
primary reason that the BusQor converter has such high efficien-
cy.
REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs cor-
rect for voltage drops along the conductors that connect the con-
verter’s output pins to the load.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the BusQor converter does not need a metal baseplate or potting
material to help conduct the dissipated energy to the heatsink.
The BusQor converter can thus be built more simply and reliably
using high yield surface mount techniques on a PCB substrate.
Pin 8 should be connected to Vout(+) and Pin 6 should be con-
nected to Vout(-) at the point on the board where regulation is
desired. If these connections are not made, the converter will
deliver an output voltage that is slightly lower than its specified
value.
Note: the output over-voltage protection circuit senses the voltage
across the sense leads (pins 8 and 6) to determine when it should
trigger, not the voltage across the converter’s output pins (pins 9
and 5).
The BusQor series of half-brick, quarter-brick and eighth-brick
converters uses the industry standard footprint and pin-out con-
figuration.
OUTPUT VOLTAGE TRIM (Pin 7): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications. SynQor uses
industry standard trim equations.
To decrease the output voltage, the user should connect a resistor
between Pin 7 and Pin 6 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
ON/OFF
ON/OFF
ON/OFF
100%
R
=
- 2 kΩ
trim-down
( )
∆
where
_
_
_
Vin( )
Vin( )
Vin( )
Positive Logic
(Permanently Enabled)
Negative Logic
(Permanently Enabled)
Vnominal – Vdesired
Vnominal
Remote Enable Circuit
=
x 100%
∆%
5V
ON/OFF
To increase the output voltage, the user should connect a resistor
between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
TTL/
CMOS
ON/OFF
Vnominal
– 2
x VDES + VNOM
_
_
(
)
Vin( )
Vin( )
Open Collector Enable Circuit
1.225
R
=
k
Ω
trim-up
Direct Logic Drive
VDES - VNOM
Figure A: Various circuits for driving the ON/OFF pin.
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 10
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
Figure B graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the output
voltage can be trimmed up or down.
constant output current. There is no minimum operating output
voltage. The converter will run with low on-board power dissi-
pation down to zero output voltage. A redundant circuit will shut-
down the converter if the primary current limit fails.
0
5
10
15
20
25
30
35
40
45
50
Back-Drive Current Limit: If there is negative output current
of a magnitude larger than the "Back-Drive Current Limit while
Enabled" specification*, then a fast back-drive limit controller will
increase the output voltage to maintain a constant output current.
If this results in the output voltage exceeding the "Output Over-
Voltage Protection" threshold*, then the unit will shut down. The
full I-V output characteristic can be seen in Figure 19.
10,000.0
1,000.0
100.0
10.0
1.0
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the “Output Over-Voltage Protection” threshold*,
the converter will immediately stop switching. This prevents dam-
age to the load circuit due to 1) excessive series resistance in out-
put current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions.
0.1
0.0
% Increase in Vout
% Decrease in Vout
Figure B: Trim Graph for 12Vout module
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection cir-
cuit to engage, particularly during transients.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal shutdown circuit is designed to turn the converter off
when the temperature at the sensed location reaches the Over-
Temperature Shutdown value. It will allow the converter to turn on
again when the temperature of the sensed location falls by the
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally filtered to eliminate noise.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
Start-up Inhibit Period: If any protection feature causes the
converter to shut down, the converter will attempt to restart after
2ms (typical), the "Startup Inhibit Period".* On initial applica-
tion of input voltage, with the on/off pin set to enable the con-
verter, the "Turn-On Time"* will increase by only 2ms.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the appli-
cation note titled “Input System Instability” available on the
SynQor website. The lockout circuitry is a comparator with DC
hysteresis. When the input voltage is rising, it must exceed the
typical “Turn-On Voltage Threshold” value* before the converter
will turn on. Once the converter is on, the input voltage must fall
below the typical Turn-Off Voltage Threshold value before the
converter will turn off.
Output Current Limit: If the output current exceeds the
"Output DC Current Limit Inception" point*, then a fast linear cur-
rent limit controller will reduce the output voltage to maintain a
* See specification page.
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 11
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
minimum external output capacitance is required, as specified in
the Output Characteristics section on the Electrical Specifications
page. No damage will occur without this capacitor connected,
but peak output voltage ripple will be much higher.
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
System Instability” is available on the SynQor website
(www.synqor.com) which provides an understanding of why
this instability arises, and shows the preferred solution for cor-
recting it.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium,
Hexavalent Chromium, Mercury, Polybrominated Biphenyls
(PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical
and Electronic Equipment. SynQor products are currently 5/6
RoHS compliant with lead being the exception. For more infor-
mation please visit our RoHS Compliance / Lead Free Initiative
web or e-mail us at rohs@synqor.com.
Application Circuits: Figure C below provides a typical cir-
cuit diagram which details the input filtering and voltage trim-
ming.
Input Filtering and External Input Capacitance: Figure D
below shows the internal input filter components. This filter dra-
matically reduces input terminal ripple current, which otherwise
could exceed the rating of an external electrolytic input capaci-
tor. The recommended external input capacitance is specified in
the “Input Characteristics” section. More detailed information is
available in the application note titled “EMI Characteristics” on
the SynQor website.
Output Filtering and External Output Capacitance:
Figure D below shows the internal output filter components. This
filter dramatically reduces output voltage ripple. However, some
2 x 22
µF
local ceramic
Vout(+)
Vin(+)
Electrolytic
Capacitor
Vsense(+)
External
Input
100µF
R
trim-up
or
ESR ≅0.2Ω
Vin
Trim
ON/OFF
Filter
C
R
load
trim-down
Iload
_
Vsense( )
_
_
Vin( )
Vout( )
Figure C: Typical application circuit (negative logic unit, permanently enabled).
Lin
Lout/2
Vin(+)
Vout(+)
Regulation
Stage
Isolation
Stage
C
C
C
2
out
1
Lout/2
Current
Sense
_
_
Vin( )
Vout( )
Figure D: Internal Input and Output Filter Diagram (component values listed on the specifications page).
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 12
Input:
Output:
35-75 V
12 V
Current:
Package:
30 A
Half-brick
Technical Specification
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s BusQor DC/DC con-
verters follows the format shown in the example below.
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character base
part number and the additional 3 characters for options.
BQ 60 120 H E A 30 N N S
Options (see
Ordering Information)
Output Max Output
Voltage Current
Output Current
Model Number
Input Voltage
Thermal Design
Performance Level
Package Size
BQ60120HEw25xyz 35 - 75 V
BQ60120HEw30xyz 35 - 75 V
12 V
12 V
25 A
30 A
The following option choices must be included in place of the
x y z spaces in the model numbers listed above.
Output Voltage
Input Voltage
Product Family
Options Description: w x y z
Thermal
Enable
Pin
Feature
Design
Logic
Length
Set
The first 12 characters comprise the base part number and the
last 3 characters indicate available options. Although there
are no default values for enable logic, pin length, and feature
set, the most common options are negative logic, 0.145” pins
and standard feature set. These part numbers are more like-
ly to be readily available in stock for evaluation and prototype
quantities.
K - 0.110"
A - Open Frame P - Positive N - 0.145"
B - Baseplated N - Negative R - 0.180"
Y - 0.250"
S - Standard
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
Contact SynQor for further information:
Warranty
Phone:
978-849-0600
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Toll Free: 888-567-9596
Fax:
978-849-0602
E-mail:
Web:
power@synqor.com
www.synqor.com
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor 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 SynQor.
Address: 155 Swanson Road
Boxborough, MA 01719
USA
Product # BQ60120HEA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BH612M Rev. B
09/02/05
Page 13
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