IR21571STR

更新时间： 2024-11-07 13:08:47

品牌	Logo	应用领域
英飞凌 - INFINEON		稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数	文件大小	规格书
17页	235K
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数据手册

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IR21571STR 数据手册

Data Sheet PD No. 60179-I

( )

IR21571

FULLY INTEGRATED BALLAST CONTROL IC

Features

Programmable preheat time & frequency

Programmable ignition ramp

Protection from failure-to-strike

Lamp filament sensing & protection

Protection from operation below resonance -

0.2V CS threshold sync’ d to falling edge on LO

Protection from low-line condition

Automatic restart for lamp exchange

Thermal overload protection

Programmable deadtime

•

Integrated 600V level-shifting gate driver

Internal 15.6V zener clamp diode on VCC

Micropower startup (150uA)

Latch immunity protection on all leads

ESD protection on all leads

•

Packages

Description

The IR21571 is a fully integrated, fully protected 600V ballast control IC designed to

drive virtually all types of rapid start fluorescent lamp ballasts. Externally program-

mable features such as preheat time & frequency, ignition ramp characteristics, and

running mode operating frequency provide a high degree of flexibility for the ballast

design engineer. Comprehensive protection features such as protection from failure of

a lamp to strike, filament failures, low dc bus conditions, thermal overload, or lamp

failure during normal operation, as well as an automatic restart function, have been

included in the design. The heart of this control IC is a variable frequency oscillator

with externally programmable deadtime. Precise control of a 50% duty cycle is accom-

plished using a T-flip-flop. The IR21571 is available in both 16 pin DIP and 16 pin narrow

body SOIC packages.

16 Lead SOIC

(narrow body)

16 Lead PDIP

Typical Connection

+ Rectified AC Line

+ V_BUS

R_Supply

VDC

CPH

RPH

R_GHS

C_BLOCKL_RES

C_PH

C_BS

C_SNUBBER

D_BOOT

C_RAMPR_PH

VCC

COM

R_T

R_RUN

C_VCC

RUN

C_STARTR_START

C_RES

R_GLS

C_T

R_DT

R_OC

R_CS

V_BUSreturn

www.irf.com

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