Datasheet > AT9933

AT9933

更新时间： 2024-11-09 04:07:23

品牌	Logo	应用领域
超科 - SUPERTEX		驱动
页数	文件大小	规格书
9页	515K
描述
Hysteretic Boost-Buck (cuk) LED Driver IC

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中文翻译

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AT9933 数据手册

AT9933

Hysteretic Boost-Buck (Ćuk) LED Driver IC

Features

General Description

The AT9933 is a variable frequency PWM controller IC,

designed to control an LED lamp driver using a low-noise

boost-buck (Ćuk) topology. The AT9933 uses patent-pending

hysteretic current-mode control to regulate both the input and

theoutputcurrents.Thisenablessuperiorinputsurgeimmunity

without the necessity for complex loop compensation. Input

current control enables current limiting during startup, input

under-voltage and output overload conditions. The AT9933

provides a low-frequency PWM dimming input that can accept

an external control signal with a duty cycle of 0 - 100% and a

high dimming ratio.

► Constant current LED Driver

► Steps input voltage Up or Down

► Low EMI

► Variable frequency operation

► Internal 8 to 100V linear regulator

► Input and output current sensing

► Input current limit

► Enable & PWM dimming

► Ambient temperature rating up to 125°C

► Meets AEC-Q100 requirements

The AT9933 based LED driver is ideal for automotive LED

lamps. The part is rated for up to 125°C ambient temperatures

and is AEC-Q100-Compliant.

Applications

► Automotive LED Lighting

Reference Documents

► AEC-Q100 Rev. F, 7/18/2003

► SAE J1752-3

Typical Application Circuit

C₁

D₂(optional)

L₂

L₁

R_D

C_D

D₃

VDC

D₁

Q₁

R_CS1

R_CS2

R_S2

R_S1

C₂

R_REF1

R_REF2

VIN

VDD

GATE

PWMD

CS2

CS1

GND

REF

C₃

AT9933

12 3 4 5 6 7...9

中文翻译

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