Astec Modular Power Supply System
AMPSS
™
BM80AHigh
Performance
Series
DC-DC Converter Module
Technical Reference Manual
Series Highlights
•
•
•
•
•
•
•
•
High Efficiency - up to 87%
85°C baseplate/ case operating temperature
Low output ripple and noise
High Reliability - over 1 million hours MTBF
Wide input voltage range
Excellent Transient Response
Fixed Switching Frequency
Designed to meet Telecom specifications
BM80A High Power Performance Series
2
Contents
Introduction....................................................................................................... 4
Special Features .............................................................................................. 4
Ordering Information ........................................................................................ 5
Safety ............................................................................................................... 5
Electrical Specifications .....................................................6
Absolute Maximum Ratings – all models ......................................................... 6
Pin Connections - all models ............................................................................ 7
Insulation - all models....................................................................................... 8
Electrical Specifications for 48V Input Models (BM80A-048L-xxxFyy) ............. 9
Electrical Specifications for 300V Input Models (BM80A-300L-xxxFyy) ......... 10
Functional Description .....................................................11
Remote Sense (+SENSE, -SENSE) .............................................................. 11
Enable Control (ENABLE) .............................................................................. 11
Output Voltage Adjustment (V ADJ) ............................................................... 12
Current Limit Adjustment (C LIM ADJ) ........................................................... 12
Power Good/Identification (PG/ID) ................................................................. 12
Clock Signals (CLK IN, CLK OUT) ................................................................. 13
Current Sharing (C SHARE) .......................................................................... 14
Current Monitoring (C MON) .......................................................................... 14
Temperature Monitoring (TEMP MON) ........................................................... 14
Design Considerations .....................................................15
Input Bulk Capacitors ..................................................................................... 15
Input Fusing ................................................................................................... 15
Remote Loads ................................................................................................ 15
Thermal Data ................................................................................................. 15
Overtemperature Protection ........................................................................... 15
Parallel Connection Considerations ............................................................... 16
Output Ripple and Noise ................................................................................ 16
Conducted EMI............................................................................................... 16
Break Regulation ............................................................................................ 16
Input Undervoltage Protection ........................................................................ 17
AMPSS
®
Reference Manual
Rev. 07 Mar 99
Specifications
3
Application Examples .......................................................18
AC Input Design ............................................................................................. 18
Parallel Connection Design ............................................................................ 18
Mechanical Information ....................................................19
Dimensions .................................................................................................... 19
Recommended PCB Layout ........................................................................... 21
Heatsink Mounting Information ....................................................................... 22
Rev. 07 Mar 99
AMPSS
®
Reference Manual
BM80A High Power Performance Series
BM80A High Power Performance Series DC-DC Converters
21
31
32
+IN 31
MOSFET
switcher
-IN 32
300V modules
only
MOSFET
switcher
Primary side
Secondary side
1mA
24
+OUT
+
INPUT
-
26
29
-OUT
AMPSS
TM
POWER MODULE
ID
Resistor
Output
detection
Current
sensing
and
control
7
PG/ID
C LIM ADJ
8
C SHARE
4
Over-
voltage
protection
PWM
control
and
gating
1mA
C MON
3
9
OVP ADJ
CLK IN 6
CLK OUT 5
C SHARE 4
C MON 3
TEMP MON 2
+SENSE 1
7 PG/ID
8 C LIM ADJ
9 OVP ADJ
10 V ADJ
11 ENABLE
12 -SENSE
ENABLE
11
1
+SENSE
CLK IN
6
OSC
Voltage
sensing
and
control
1mA
12
-SENSE
CLK OUT
5
10
VADJ
+
OUTPUT -
26 27 28 29
21 22 23 24
TEMP MON
2
Internal
temperature
sensor
Introduction
The BM80A is an isolated, single output DC to DC
converter module, providing up to 300W output
with a maximum baseplate operating temperature
of 85°C with no derating. The BM80A features full
safety isolated low voltage secondary side control
and Astec Linear Programming (ALP™) for
convenient adjustment of the module's param-
eters.
Special Features
•
High Efficiency - up to 87%
•
1MHz fixed switching frequency
•
85°C baseplate/Case operating temperature -
•
•
•
•
•
•
•
no derating
Low output ripple and noise
Excellent transient response
Safety isolated low voltage interface with
ALP
TM
linear control
High Reliability - over 1 million hours MTBF
Wide input voltage range
Parallelable with accurate current sharing
Current and temperature monitoring outputs
4
AMPSS
®
Reference Manual
Rev. 07 Mar 99
Specifications
Ordering Information
M o d e l
B
B
B
B
B
B
B
B
M
M
M
M
M
M
M
M
8
8
8
8
8
8
8
8
0
0
0
0
0
0
0
0
A
A
A
A
A
A
A
A
N u m b e r
-
-
-
-
-
-
-
-
3
3
3
3
3
3
3
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
L
L
L
L
L
L
L
L
-
-
-
-
-
-
-
-
0
0
0
0
0
0
1
1
2
2
2
3
3
5
2
5
1
2
2
3
3
0
0
0
F
F
F
F
F
F
F
F
1
7
8
7
9
6
2
2
0 0
5
5
0
0
0
7
0
In p u t
V o l ta g e
3
3
3
3
3
3
3
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
V
V
V
V
V
V
V
V
O u tp u t
V o l ta g e
2
2
2
3
3
5
1
1
.1
.2
.2
.3
.3
.0
2 .
5 .
V
V
V
V
V
V
0 V
0 V
O u tp u t
C u r r e n t
1
7
8
7
9
6
2
2
0
5
5
0
0
0
7
0
0 A
A
A
A
A
A
A
A
O u tp u t
P o w e r
2
1
1
2
2
3
3
3
1
6
8
3
9
0
2
0
0
5
7
1
7
0
4
0
W
W
W
W
W
W
W
W
B M 8 0 A -0 4 8 L -0 3 3 F 7 0
B M 8 0 A -0 4 8 L -0 5 0 F 6 0
B M 8 0 A -0 4 8 L -1 2 0 F 2 7
4 8 V
4 8 V
4 8 V
3 .3 V
5 .0 V
1 2 .0 V
7 0 A
6 0 A
2 7 A
2 3 1 W
3 0 0 W
3 2 4 W
Please contact Astec for information on other output voltages, power ranges and configurations.
Safety
UL:
CSA:
VDE:
CE:
UL1950
CSA C22.2 No.950
VDE 0805
EN60950
CE Mark
Please contact Astec for information on specific module approvals.
Note:
Ensure all modules are used according to the Installation Instructions provided with each module.
All modules are designed to meet the following specifications:
ETS300-132-2,
EN55022-A
(1)
EN55022-B
(1)
EN41003
IEC6100-44
(1)
IEC6100-45
(1)
IEC950
VDE0871-A
(1)
VDE0878-A
(1)
BTNR2511(5)
(1)
(1)
Require additional external circuitry for full compliance. Please refer to application section of this manual or
contact technical support office for further information.
Rev. 07 Mar 99
AMPSS
®
Reference Manual
5
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