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參數資料
| 型號： | SRM4010 |
| 英文描述： | DC:DC Converter |
| 中文描述： | 直流：DC轉換器 |
| 文件頁數： | 10/11頁 |
| 文件大小： | 224K |
| 代理商： | SRM4010 |
Microsemi
Colorado Division
800 Hoyt Street, Broomfield, CO. 80020, 303-469-2161, Fax: 303-466-3775
Page 10
Copyright 2000
2003-02-05 Rev. IR
W
M
.
C
SRM4010
40A Synchronous Rectifier Module
COLOR ADO DIVISION
Multi-Output Applications
The module can be used in multiple output converters also. As in
any converter with multiple outputs from one power converter,
there are limitations on the range of load variations for good
regulation.
Below is a two output application where one output is regulated
and the other tracks based on the transformer turns ratio. As long
as both sections are operating in the continuous conduction
mode over the required load range, this approach actually has
very good cross regulation. The low voltage drop in the module
helps to improve cross regulation.
The dual output approach can be followed by a non-isolated buck
power converter to improve regulation if needed. This still allows
the two outputs to have isolated grounds. The switching regulator
can be an integrated regulator with the power switches internal to
the device or even a synchronous rectifier approach. The
secondary winding rectifiers also can be implemented with
Schottkys. For the cases where the power level is lower for the
Figure 9
secondary output, this can be combined with a simple linear
regulator.
Hot Swap and Redundant Converter
Applications
The self-driven approach to synchronous rectification has
serious problems when converters are operated in parallel. This
is desirable in many applications to improve system reliability or
to allow higher output current than is practical with a single
converter or in some cases to power a load from multiple power
inputs. In the self-driven approach, the output power devices can
oscillate when the converters are paralleled. This causes large
power dissipation and even failure of the power devices.
Forward converters using the SRM4010 are well behaved when
they are connected to other power converter outputs.
A
P
T1C
5
6
U1
SRM4010
1
2
3
4
5
6
7
8
9
CTCH
FWD
Sgnd
REGin
REGout
Pgnd
CDLY
CPDT
SPD
R2
C4
R6
T6D
7
8
1
D3
U1
SRM4010D
1
2
3
4
5
6
7
8
9
CTCH
FWD
Sgnd
REGin
REGout
Pgnd
CDLY
CPDT
SPD
C1
C1
R3
T1E
9
10
C2
47 PF
Q1
C5
T1B
3
4
L1
1
R1
1
CURRENT
MODE
CONTROL
T1A
1
2
R4
R5
L1
ISO1
1
2
3
4
C3
22 PF
C2
47 PF
U2
TLV431A
C3
22 PF
D1
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