SMPS
LED Lighting
IRS2982SPBF
LED/SMPS FLYBACK CONTROL IC
Features
High voltage fast startup
Voltage mode control
Critical-conduction / transition mode operation
Constant voltage / current regulation
High power factor / low iTHD
Minimum off time (DCM at light load)
Burst mode operation at very light load
Cycle cy cycle over-current protection
Open load over voltage protection
Micro-power startup (50A)
Low quiescent current
Latch immunity and ESD protection
Noise immunity
Product Summary
Topology
I
o+
& I
o-
(typical)
t
r
& t
f
(typical)
Flyback
200 mA / 400 mA
60 ns / 30 ns
Package
Typical Applications
LED Drivers
Power Supplies
8-Lead SOIC
IRS2982SPBF
Ordering Information
Standard Pack
Base Part Number
Package Type
Form
Tube/Bulk
IRS2982SPBF
SO8N
Tape and Reel
2500
IRS2982STRPBF
Quantity
95
IRS2982SPBF
Complete Part Number
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IRS2982SPBF
Table of Contents
Description
Qualification Information
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
Functional Block Diagram
State Diagram
Input / Output Pin Equivalent Circuit Diagram
Lead Definitions
Lead Assignments
Application Information and Additional Details
Performance Graphs
Package Details
Tape and Reel Details
Part Marking Information
Page
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IRS2982SPBF
Description
The IRS2982 is a versatile SMPS control IC designed to drive switching converters for LED drivers and power
supplies. Features include; integrated high voltage start up, accurate temperature compensated internal reference,
transconductance type error amplifier, primary sensed open circuit protection and cycle by cycle primary current
limiting. The IRS2982 is compatible with Buck, Boost, Flyback and other SMPS circuit topologies and is able to
regulate voltage or current directly or by secondary feedback through an opto-isolator. The high voltage startup cell
enables the VCC supply to be derived initially from the DC bus until an auxiliary inductor winding or other supply
source is able to take over enabling rapid start up under all line input voltage conditions. The IRS2982 uses voltage
mode control operating in critical conduction (CrCM) with a minimum off time limit so that it enters discontinuous
(DCM) mode at light loads. Burst mode operation is also available at very light loads.
The IRS2982 is ideal for single stage converters with an unsmoothed DC bus to obtain high power factor and low
line current THD.
Typical Connection Diagrams
1. Non-isolated Flyback LED driver –
CURRENT REGULATED
DFB
RADJ
RSN
DVCC
CSN
T1
DSN
QVCC
CIN
RZ
HV
BR1
IC1
VCC
1
8
RZX1
DZ
CS
CVOUT
ROUT
CVCC
AC
Line
Input
2
COMP
IRS2982
FB
OUT
7
COM
3
ZX
6
CS
4
5
RG
CCOMP
M1
RF
RLED
RCS
CF
RZX2
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IRS2982SPBF
2. Isolated Flyback SMPS –
VOLTAGE REGULATED
DFB
+VOUT
RSN
RVCC
CSN
T1
DSN
DVCC
CIN
RFB1
HV
BR1
IC1
VCC
RZX1
DZ
CS
CVOUT
ROUT
1
8
CVCC
AC
Line
Input
2
COMP
IRS2982
FB
OUT
7
COM
3
ZX
6
CS
4
RFB2
CCOMP
5
RG
M1
RF
RCS
CF
RZX2
CI
-VOUT
3. Non-Isolated Flyback SMPS –
VOLTAGE REGULATED
DFB
+VOUT
RSN
RVCC
CSN
T1
DSN
DVCC
CIN
RFB1
HV
BR1
IC1
VCC
RZX1
DZ
CS
CVOUT
ROUT
1
8
CVCC
AC
Line
Input
2
COMP
IRS2982
FB
OUT
7
COM
3
ZX
6
CS
4
RFB2
CCOMP
5
RG
M1
RF
RCS
CF
RZX2
-VOUT
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IRS2982SPBF
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.
SOIC8
MSL2
†††
260°C
(per IPC/JEDEC J-STD-020)
Moisture Sensitivity Level
Machine Model
ESD
Human Body Model
IC Latch-Up Test
RoHS Compliant
†
Class B
(per JEDEC standard JESD22-A115)
Class 1C
(per EIA/JEDEC standard EIA/JESD22-A114)
Class I, Level A
(per JESD78)
Yes
Qualification standards can be found at Infineon’s web site
http://www.infineon.com/cms/en/product/technology/quality/
†† 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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