Datasheet > AT9932

AT9932

更新时间： 2024-09-16 01:22:15

品牌	Logo	应用领域
超科 - SUPERTEX		/
页数	文件大小	规格书
10页	655K
描述
Automotive Boost-Buck LED Lamp Driver IC

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AT9932 数据手册

Supertex inc.

AT9932

Automotive Boost-Buck

LED Lamp Driver IC

Features

General Description

The AT9932 is an advanced ﬁxed frequency PWM

controller IC designed to control an LED lamp driver using

a boost-buck topology that can step the input voltage up

or down automatically. The IC provides fast output current

transient response and very low susceptibility to input

voltage transients, which allows the lamp driver to pass the

rigorous electrical transient requirements of SAE J1455 or

ISO 7637-2, making the AT9932 an ultimate solution for

automobile lighting. Capacitive isolation protects the LED

Lamp from failure of the switching MOSFET.

► Constant output current

► Steps output voltage up or down

► Very low susceptibility to Input voltage transients

► Frequency jitter

► Externally programmable ﬁxed switching frequency

► Temperature foldback with external NTC resistor

► Internal 40V voltage regulator

► +/-1A MOSFET gate driver

► Short LED protection

► Open LED protection

The AT9932 features a unique feed-forward current control

scheme, differential output current sensing, soft start,

protection from short or open LED load. Switching frequency

can be programmed with a single external resistor.

► Input undervoltage protection

► Enable & PWM dimming

► Trimmed reference (±3% accurate)

► AEC-Q100 compliant

The AT9932 includes a temperature fold-back of the output

current using an external NTC resistor. This feature allows

maximizing the light output of the LED load over the entire

operating temperature range.

Applications

► Automobile lighting

► Battery powered LED lamps

► Other low voltage AC/DC or DC/DC LED drivers

Typical Application Circuit

C₁

L₂

L₁

C_O

R_d

C_IN

C_d

M₁

VIN

AVDD

GATE

FFP

R_IN

D₁

R_P

ZD₁

PVDD

LED(s)

R_N

C_VDD

FFN

REF

PWMD

UVLO

R_OV

R_FB

R_T

R_REF

R_INC

FLT

R_FLT

R_S

C_SS

R_DRP

PGND

GND

C_REF

DRP

C_C

R_NTC

COMP

NTC

R₃

R₂

R₁

C_JTR

DIV

JTR

AT9932

Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com

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