Datasheet No - PD97469
Nov 2, 2009
IR11672AS
ADVANCED SMART RECTIFIER
TM
CONTROL IC
Features
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Product Summary
Flyback,
Resonant Half-bridge
200V
10.7V
+2A & -7A
60ns (typical)
50ns (typical)
Secondary side high speed SR controller
Topology
DCM, CrCM flyback and Resonant half-bridge
topologies
200V proprietary IC technology
VD
Max 500KHz switching frequency
V
OUT
Anti-bounce logic and UVLO protection
7A peak turn off drive current
I
o+
& I
o-
(typical)
Micropower start-up & ultra low quiescent current
Turn on Propagation
10.7V gate drive clamp
Delay
50ns turn-off propagation delay
Vcc range from 11.3V to 20V
Turn off Propagation
Direct sensing of MOSFET drain voltage
Delay
Enable function synchronized with MOSFET VDS
transition
Cycle by Cycle MOT Check Circuit prevents multiple
Package Options
false trigger GATE pulses
Lead-free
Compatible with 0.3W Standby, Energy Star, CECP,
etc.
Typical Applications
•
LCD & PDP TV, Telecom SMPS, AC-DC adapters,
ATX SMPS, Server SMPS
8-Lead SOIC
Typical Connection Diagram
Vin
Rs
XFM
Cs
1
Ci
2
3
RMOT
4
Rdc
U1
VCC
OVT
MOT
EN
VGATE
GND
VS
VD
8
7
6
5
Rg
IR11671
IR11672AS
Cdc
Co
Rtn
Q1
*Please note that this datasheet contains advance information that could change before the product is
released to production.
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© 2009 International Rectifier
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IR11672AS
Table of Contents
Description
Qualification Information
Absolute Maximum Ratings
Electrical Characteristics
Functional Block Diagram
Input/Output Pin Equivalent Circuit Diagram
Lead Definitions
Lead Assignments
Application Information and Additional Details
Package Details
Tape and Reel Details
Part Marking Information
Ordering Information
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© 2009 International Rectifier
2
IR11672AS
Description
IR11672A is a smart secondary-side driver IC designed to drive N-Channel power MOSFETs used as
synchronous rectifiers in isolated Flyback and resonant half-bridge converters. The IC can control one or
more paralleled N-MOSFETs to emulate the behavior of Schottky diode rectifiers. The drain to source voltage
is sensed differentially to determine the polarity of the current and turn the power switch on and off in
proximity of the zero current transition. Ruggedness and noise immunity are accomplished using an
advanced blanking scheme and double-pulse suppression which allow reliable operation in all operating
modes.
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© 2009 International Rectifier
3
IR11672AS
Qualification Information
†
Qualification Level
Industrial
††
Comments: This family of ICs has passed JEDEC’s
Industrial qualification. IR’s Consumer qualification level is
granted by extension of the higher Industrial level.
MSL2
†††
260°C
(per IPC/JEDEC J-STD-020)
Class B
(per JEDEC standard JESD22-A115)
Class 2
(per EIA/JEDEC standard EIA/JESD22-A114)
Class I, Level A
(per JESD78)
Yes
Moisture Sensitivity Level
Machine Model
ESD
Human Body Model
IC Latch-Up Test
RoHS Compliant
†
††
Qualification standards can be found at International Rectifier’s web site
http://www.irf.com/
Higher qualification ratings may be available should the user have such requirements. Please contact your
International Rectifier sales representative for further information.
††† Higher MSL ratings may be available for the specific package types listed here. Please contact your
International Rectifier sales representative for further information.
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© 2009 International Rectifier
4
IR11672AS
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All
voltage parameters are absolute voltages referenced to COM, all currents are defined positive into any lead.
The thermal resistance and power dissipation ratings are measured under board mounted and still air
conditions.
Parameters
Supply Voltage
Enable Voltage
Cont. Drain Sense Voltage
Pulse Drain Sense Voltage
Source Sense Voltage
Gate Voltage
Operating Junction Temperature
Storage Temperature
Thermal Resistance
Package Power Dissipation
Switching Frequency
Symbol
V
CC
V
EN
V
D
V
D
V
S
V
GATE
T
J
T
S
R
θJA
P
D
fsw
Min.
-0.3
-0.3
-3
-5
-3
-0.3
-40
-55
Max.
20
20
200
200
20
20
150
150
128
970
500
Units
V
V
V
V
V
V
°C
°C
°C/W
mW
kHz
Remarks
V
CC
=20V, Gate off
SOIC-8
SOIC-8, T
AMB
=25°C
Recommended Operating Conditions
For proper operation the device should be used within the recommended conditions.
Symbol
V
CC
V
D
T
J
Fsw
Definition
Supply voltage
Drain Sense Voltage
Junction Temperature
Switching Frequency
Min.
11.4
-3
-25
---
Max.
18
200
125
500
Units
V
°C
kHz
Recommended Component Values
Symbol
R
MOT
Component
MOT pin resistor value
Min.
5
Max.
75
Units
kΩ
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© 2009 International Rectifier
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