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IRS2530DPBF

DIM8™ DIMMING BALLAST CONTROL IC

International Rectifier 

IRS2530D(S)

Description

This IC takes full advantage of IR’s patented ballast and high-voltage technologies to realize a simple, high-

performance dimming ballast solution. A single high-voltage pin senses the half-bridge current and voltage

to perform necessary ballast protection functions. The DC dim input voltage reference and the AC lamp

current feedback have been coupled together allowing a single pin to be used for dimming. Combining these

high-voltage control algorithms together with a simple dimming method in a single 8-pin IC results in a large

reduction in component count, an increase in manufacturability and reliability, a reduced design cycle time,

while maintaining high dimming ballast system performance

Block Diagram

VCC 1

COM 2

UVLO

1uA

Voltage

VCO 4

Controlled

Oscillator

Dimming

Control

DIM 3

Driver

Logic

Bootstrap

MOSFET

High-Side

Half-bridge

Driver

Fault

Logic

Crest

Factor

Protection

Non-ZVS

Protection

Half-bridge

Voltage

Sensing

Low-Side

Half-bridge

Driver

Restart

Logic

8 VB

7 HO

6 VS

5 LO

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© 2008 International Rectifier

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