Document
September 8, 2010 Datasheet No – PD97524
IRS254(01,11)
LED BUCK REGULATOR CONTROL IC Features
• 200 V (IRS25401) and 600 V (IRS25411) half bridge driver • Micropower startup (<500 μA) • ±2% voltage reference • 140 ns deadtime • 15.6 V zener clamp on VCC • Frequency up to 500 kHz • Auto restart, non-latched shutdown • PWM dimmable • Small 8-Lead DIP/8-Lead SOIC packages
Product Summary
Topology VOFFSET VOUT Io+ & I o- (typical) tON & tOFF (typical) Deadtime (typical) Buck 200V,600V VCC 0.5A/0.7A 50/30nS 140nS
Typical Applications
LED drivers for lamp replacement LED driver back end current regulator
Packages
8-Lead PDIP IRS254(01,11)PbF
8-LeadSOIC IRS254(01,11)SPbF
Typical Connection Diagram
VBUS L2 VOUT + RS1 RS2 DBOOT
IC1 CVCC1 ROV1 CBUS2 CBUS1 DOV ROV2 CEN RF
ENN VCC COM
1
8
VB
IRS25401
DCLAMP
CVCC2
2
IFB
7 6 5
HO
RG1 CBOOT
M1 L1
3 4
VS
LO
M2 RG2 COUT VOUT -
RCS ROUT CF COM EN DEN1
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IRS254(01,11)(S)
Table of Contents
Description Qualification Information Absolute Maximum Ratings Recommended Operating Conditions lectrical 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
Page 3 5 6 6 7 8 9 10 10 12 17 18 19 20
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IRS254(01,11)(S)
Description
The IRS254(01,11) are high voltage, high frequency buck control ICs for constant LED current regulation. They incorporate a continuous mode time-delayed hysteretic buck regulator to directly control the average load current, using an accurate on-chip bandgap voltage reference. These parts directly replace the IRS2540 and IRS2541 with improved latch up immunity. The application is inherently protected against short circuit conditions, with the ability to easily add open-circuit protection. An external high-side bootstrap circuit drives the buck switching element at high frequencies. A lowside driver is also provided for synchronous rectifier designs. All functions are realized within a simple 8 pin DIP or SOIC package.
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IRS254(01,11)(S)
Alternate application circuit using a single MOSFET
IRS25401
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IRS254(01,11)(S)
Qualification Information
Qualification Level
†
Moisture Sensitivity Level Machine Model ESD Human Body Model IC Latch-Up Test RoHS Compliant † †† †††
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 SOIC8 (per IPC/JEDEC J-STD-020) PDIP8
Not applicable (non-surface mount package styl.