Datasheet > AAT1235IRN-T1

AAT1235IRN-T1

更新时间： 2024-02-09 01:18:35

品牌	Logo	应用领域
ANALOGICTECH		驱动器
页数	文件大小	规格书
21页	958K
描述
High Efficiency White LED Drivers for Backlight and Keypad

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技术参数
数据手册

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AAT1235IRN-T1 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.83
接口集成电路类型：	LED DISPLAY DRIVER	Base Number Matches：	1

AAT1235IRN-T1 数据手册

AAT1235

High Efficiency White LED Drivers

for Backlight and Keypad

Pin Descriptions

Pin #

Symbol

Function

VIN

Input supply for the converter. Connect a 2.2µF or larger ceramic capacitor from VIN to

GND.

Boost output over voltage detect pin. Use resistor divider to set the circuit's external over-

voltage protection. See Applications Information for details.

EN/SET

AS²Cwire control or enable pin.

Backlight current sink 1. Connect the cathode of the last LED in the string to B1.

Backlight current sink 2. Connect the cathode of the last LED in the string to B2.

LED current set resistor. A 22.6kΩ resistor from RSET to AGND sets the maximum LED cur-

rent in A1-A3 and B1-B2 to 20mA.

RSET

Input bias supply for the internal circuitry. Connect IN to VIN directly at the AAT1235.

Ground for the boost converter. Connect GND to AGND at a single point as close to the

AAT1235 as practical.

GND

Boost converter switching node. A 2.2µH inductor, connected between SW and LIN, sets the

boost converter's switching frequency.

10, 11

N/C

AGND

Not connected.

Ground pin. Connect AGND to GND at a single point as close to the AAT1235 as practical.

Auxiliary current sink 3. Connect the cathode of the last LED in the string to A3.

Auxiliary current sink 2. Connect the cathode of the last LED in the string to A2.

Auxiliary current sink 1. Connect the cathode of the last LED in the string to A1.

Switched power input. Connect LIN to the external power inductor.

Exposed paddle (bottom) Connected internally to SW. Connect to SW or leave floating.

LIN

Pin Configuration

TDFN34-16

(Top View)

LIN

AGND

N/C

VIN

EN/SET

RSET

GND

1235.2007.02.1.1

123 4 5 6 7...21

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