AT9933 datasheet(1/16 Pages) MICROCHIP

tên linh kiện	AT9933

Giải thích chi tiết về linh kiện	Hysteretic Boost-Buck (훴uk) LED Driver IC

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DS20005597A-page 1

AT9933

Features

• Constant Current LED Driver

• Steps Input Voltage Up or Down

• Low Electromagnetic Interference (EMI)

• Variable Frequency Operation

• Internal 75V Linear Regulator

• Input and Output Current Sensing

• Input Current Limit

• Enable and Pulse-width Modulation (PWM)

Dimming

• Ambient Temperature Rating of up to 125°C

Applications

• LED Lighting Applications

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.

It

uses

patent-pending Hysteretic Current-mode control to

regulate both the input and the output currents. This

enables superior input surge immunity without the

necessity for complex loop compensation. Input

current control enables current limiting during Startup,

Input Undervoltage 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.

This AT9933-based LED driver is ideal for LED lamps.

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

Package Type

REF

CS2

VDD

PWMD

VIN

CS1

GND

GATE

8

7

6

5

1

2

3

4

8-lead SOIC

(Top View)

See Table 2-1 for pin information.

Hysteretic Boost-Buck (Ćuk) LED Driver IC

Số phần tương tự - AT9933

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Supertex, Inc	AT9933	515Kb / 9P	Hysteretic Boost-Buck (cuk) LED Driver IC
	AT9933DB1	1Mb / 11P	High Bright LED Driver IC Meeting Automotive Requirements
	AT9933LG-G	625Kb / 9P	Hysteretic Boost-Buck (훴uk) LED Driver IC
	AT9933	625Kb / 9P	Hysteretic Boost-Buck (훴uk) LED Driver IC

More results

Mô tả tương tự - AT9933

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Supertex, Inc	HV9930	525Kb / 7P	Hysteretic Boost-Buck (Cuk) LED Driver ICs
Supertex, Inc	AT9933	515Kb / 9P	Hysteretic Boost-Buck (cuk) LED Driver IC
Union Semiconductor, In...	UM1361S	480Kb / 13P	Hysteretic Buck High Brightness LED Driver with Internal Switch
Supertex, Inc	AT9933	625Kb / 9P	Hysteretic Boost-Buck (훴uk) LED Driver IC
	AT9932	655Kb / 10P	Automotive Boost-Buck LED Lamp Driver IC
	HV9930	570Kb / 7P	Hysteretic Boost-Buck (훴uk) LED Driver IC
SYNC POWER Crop.	SP2354	286Kb / 8P	1A Buck-Boost LED Driver
Bright Power Semiconduc...	BP1808	309Kb / 2P	Boost, Buck and Buck-Boost DC/DC LED Driver
QX Micro Devices Co.,Lt...	QX5278	810Kb / 2P	Buck-boost LED driver
Shenzhen Huazhimei Semi...	HM3442	515Kb / 8P	Buck-boost LED driver

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