SRM4010 MICROSEMI, SRM4010 Datasheet

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SRM4010

Manufacturer Part Number
SRM4010
Description
Manufacturer
MICROSEMI
Datasheet

Specifications of SRM4010

Lead Free Status / Rohs Status
Not Compliant
Copyright
2004-02-06
The SRM
solution for implementing very high
efficiency Synchronous Rectification and
eliminates many of the problems with self-
driven approaches. The module connects to
the transformer secondary of a Forward
Converter to provide complete high current
rectification at output voltages ranging from 5
volts down to 1.0 volt, in a thermally efficient
surface mount package.
Rectification Efficiency as high as 95% is
achieved by avoiding cross conduction.
Dedicated Ics provide effective Gate drive of
the ultra low Rds(on) MOSFETs used in the
module. In conventional self-driven
approaches, the MOSFET drive ends as soon
as the power transformer finishes resetting.
This causes increased losses as the duty cycle
decreases. The SRM
drives either the Forward or the Catch
MOSFET over virtually the entire duty cycle.
Only a small prediction time, typically 100 ns,
is needed to avoid cross conduction.
The SRM
large sudden changes in duty cycle. This
makes the module suitable for current mode
control applications, with large load changes
48 to 150V
48 to 150V
V
V
IN
IN
2000
REV. 1
TM
TM
4010 Module is a complete
4010 is designed to handle
Controller
Controller
PWM
PWM
TM
4010 control circuitry
C O L O R A D O D I V I S I O N
P R OD UC T H I G H LI GH T
P R OD UC T H I G H LI GH T
P R OD UC T H I G H LI GH T
P R OD UC T H I G H LI GH T
800 Hoyt Street, Broomfield, CO. 80020, 303-469-2161, Fax: 303-466-3775
D E S C R I P T I O N
D E S C R I P T I O N
D E S C R I P T I O N
D E S C R I P T I O N
Feedback
Feedback
Figure 1
OPTO
OPTO
REG
REG
5V
5V
where high bandwidth is needed. Proprietary
prediction circuitry eliminates cross conduction
for sudden large changes in pulse width. The
module is self-powered from the transformer
secondary winding and operates over a wide
range of peak transformer voltages and PWM
frequencies.
A 5-Volt Linear Regulator is also available as
a power supply for other secondary side
circuitry such as powering opto coupler
feedback. In very low voltage applications
where the peak transformer voltage is not high
enough for powering the modules, secondary
power can be provided to the regulator from an
additional transformer winding.
The High Current Surface Mount Package
has Low Inductance, and robust terminals
for superior regulation and low noise
susceptibility in high load current transients.
The Module has an isolated base and is
designed for direct PCB mounting with the
terminals formed within the package. The
base-plate of the module allows heat to be
dissipated by the PCB etch, or a mechanical
sink attachment through the PCB for higher
power applications.
FWD
FWD
SRM4010
SRM
PGND
PGND
TM
4010
CTCH
CTCH
Colorado Division
Microsemi
40A Synchronous Rectifier Module
V
V
1 to 5V
1 to 5V
OUT
OUT
Easy to use Surface Mountable
Very High Rectification
Integrated Solution with few
Robust Package with Copper
5 Volt Linear Regulator
Suitable for converters that
Avoids problems with parallel
Operates at PWM Frequencies
ranging from 200 to 400KHz
High Current Isolated DC-DC
Distributed Power
CPU Power Supply off 48VDC
Bus
Solution for up to 40A
Efficiency at Output Voltages
from 5V down to 1V
external parts saves Board
Space
Base-Plate provides Effective
Heat Distribution
available to power Secondary
side Circuitry
operate at light load
operation that plague simple
self-driven schemes
Converters
Architectures
K E Y F E A T U R E S
K E Y F E A T U R E S
K E Y F E A T U R E S
K E Y F E A T U R E S
APPLICATIONS
APPLICATIONS
APPLICATIONS
APPLICATIONS
P A C KA GE
P A C KA GE
P A C KA GE
P A C KA GE
Figure 2
SRM
TM
4010
Page 1

Related parts for SRM4010

SRM4010 Summary of contents

Page 1

... PCB etch mechanical sink attachment through the PCB for higher power applications OUT OUT FWD FWD CTCH CTCH TM SRM4010 SRM 4010 5V 5V REG REG PGND PGND OPTO OPTO Feedback Feedback Figure 1 Microsemi Colorado Division ...

Page 2

... I 40A, V OUT in 10V, fsw 300KHz fsw No Cross Conduction in Single Cycle T FWD T FWD T CTCH V REG I REG (RƟ Ɵ Ɵ Ɵ J-C) Microsemi Colorado Division TM SRM 4010 TM SRM 4010 Units Min Typ Max 2.8 mohm 2.8 mohm 8.0 15.0 Volts 1 ...

Page 3

... Pin 9 is used to tailor the module’s ability to differentiate between valid turn off of the Catch SPD MOSFET and ringing that can occur at light load. Copyright 2000 2004-02-06 REV. 1 800 Hoyt Street, Broomfield, CO. 80020, 303-469-2161, Fax: 303-466-3775 40A Synchronous Rectifier Module Figure 3 Microsemi Colorado Division TM SRM 4010 Page 3 ...

Page 4

... Copyright 2000 2004-02-06 REV. 1 800 Hoyt Street, Broomfield, CO. 80020, 303-469-2161, Fax: 303-466-3775 40A Synchronous Rectifier Module Figure Figure 5 Microsemi Colorado Division TM SRM 4010 Page 4 ...

Page 5

... When the primary-side switch turns on, the internal control circuitry turns off the Catch MOSFET slightly before the rise of the voltage and also turns on the forward MOSFET Figure 6 TM 4010 Forward Converter Block Diagram Microsemi Colorado Division TM SRM 4010 Page 5 ...

Page 6

... ON time and maximum OFF time. This is due to internal timing used for prediction. The timing circuitry will saturate at low frequency if the times exceed the capability of the timing circuits. At the high frequency end, the same timing is less accurate Microsemi Colorado Division TM SRM 4010 ...

Page 7

... These inductors are suitable for low volume sampling and development. Volume production using optimized planar TM inductors with the SRM 4010 will have a typical converter efficiency higher than the demonstration board’s efficiency. Microsemi Colorado Division TM SRM 4010 TM 4010 and flood Page 7 ...

Page 8

... Synchronous Rectifier Module 4010 in an isolated Forward converter. The 5 volt output from the internal CTCH TM SRM 4010 REGin FWD REGout 7 5 Pgnd Sgnd SPD CPDT CDLY OPTICAL ISOLATOR Figure 7 Microsemi Colorado Division TM SRM OUTPUT INDUCTOR TLV431A 3 1 ISO1 4 2 4010 C1 Page 8 ...

Page 9

... Hoyt Street, Broomfield, CO. 80020, 303-469-2161, Fax: 303-466-3775 40A Synchronous Rectifier Module T1E T1A T6D 1 U1 CTCH TM SRM 4010 4 REGin FWD REGout 8 Pgnd Sgnd SPD CPDT CDLY Figure 8 TM 4010 Configured for outputs below 1.25 Volts Microsemi Colorado Division SRM TLV431A 3 1 ISO1 4010 OUT Page 9 ...

Page 10

... U1 CTCH T M SRM 4010 REGin REGout Pgnd Sgnd SPD CPDT CDLY T1A T6D 1 U1 CTCH TM SRM 4010 4 REGin REGout Pgnd Sgnd SPD CPDT CDLY Figure 9 TM SRM 4010 Multiple Output Configuration Microsemi Colorado Division SRM TLV431A 1 ISO1 2 TM 4010 Page 10 ...

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