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AS1170

General description

Datasheet

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DS001083

• v2-00 • 2024-Feb-05

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AS1170 High current LED/VCSEL driver

General description

The AS1170 is an inductive high efficient DCDC step up converter with two current sinks. The

DCDC step up converter operates at a fixed frequency of 4 MHz and includes soft startup to

allow easy integration into noise sensitive RF systems. The AS1170 includes flash timeout,

overvoltage, over temperature, undervoltage and short circuit protection functions. The

AS1170 is controlled by an I²C interface and has a hardware automatic shutdown if SCL=0 for

100 ms. Therefore, no additional enable input is required for shutting down of the device once

the system shuts down. The AS1170 is available in a space-saving WL-CSP package

measuring only 2.25 mm x 1.5 mm x 0.6 mm.

1.1

Key benefits & features

The AS1170 module is specifically designed for:

Table 1: Added value overview

Features

Benefits

High efficiency 4 MHz fixed frequency DCDC Boost converter

Stable even in coil current limit

Independent channel control

Combine channels for higher current output

PWM operation for lower output current

31.25 kHz to avoid audible noise

WL-CSP package

Tiny footprint of

2.25 mm x 1.5 mm x 0.6 mm

Automatic current adjustment for low battery voltage

Long battery lifetime

High output current

Current adjustable up to 2000 mA

1.2

Applications

•

Flash / torch / video light for smartphones, feature-phones

•

3D sensing

– Active stereo vision / structured light

•

Handheld scanners

•

Safety signage

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