AAT1501/A 데이터 시트보기 (PDF) - Advanced Analog Technology, Inc.

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AAT1501/A

REGULATED CHARGE PUMP DC/DC CONVERTERS

Advanced Analog Technology, Inc. 

Advanced Analog Technology, Inc.

APPLICATION CIRCUIT FOR BACKLIGHT DIMMING

AAT1501/A

APPLICATION INFORMATION

Operation

AAT1501 is a simple white LED driver. It uses charge pump to generate output voltage 2 times larger

than input voltage and keeps the output voltage stable by using the comparator of the device. The current of

the white LED could be set by an external resistor.

Short Circuit Protection

AAT1501/A includes a current-limit circuit. Whenever excessive current is generated, the mechanism

takes over the output regulation circuit and reduces output current to a typical level of 150mA.

LED Current Setting

A LED current ( ILED _ ) is set by a resistor, as follows:

R

_

=

V

O

−

V

F

I

LED _

– 台灣類比科技股份有限公司 –

– Advanced Analog Technology, Inc. –

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