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AS1170 2-channel LED and VCSEL driver IC

Driver with integrated boost converter and high output currents

Features

High efficiency 4 MHz fixed frequency DCDC boost converter
Independent channel control
High output current
Channels can be combined for single output
Integrated protection functions
Automatic current adjustment for low battery voltage
13 balls WLCSP 2.25mm x 1.5mm x 0.6mm

Benefits

Very compact/small 1µH inductor due to fast switching frequency
Can drive 2 channels independently with up to 1000mA each or 2000mA combined
Integrated circuit protection
Automatic battery lifetime extension
Tiny footprint and BOM for applications with space constraints

Product parameters

Output [#]	2
LED Current per Output [mA]	1000
Features	DCDC boost, I2C, INT
Error Detection	Yes
Read-Back	Yes
LED-to-LED Matching [%]	7
Supply Voltage [V]	2.7 - 4.4
Package	WLCSP 2.25mm x 1.5mm x 0.6mm

General description

The AS1170 is a 2-channel LED/VCSEL driver with integrated boost converter. It can support up to 5.5V output voltage and each channel can support 1000mA output current. Currents can be combined to a total of 2000mA and adjusted using 31.25kHz PWM operation. AS1170 features integrated protection functions against overtemperature, over- or under voltage and open of shorted LED pins. The device has an I2C interface with 2 adresses, selectable via an I2C select pin. The 13 balls WLCSP makes this chip a good fit wherever high output currents and a tiny footprint are needed.

This product suits for the following applications:

Flash / torch / video light for smartphones, feature-phones
3D sensing – Active Stereo Vision / Structured Light
Handheld scanners
Safety signage

Technical documents

	Type	Description	Language
	Datasheet	AS1170 datasheet	English

Other information

	Type	Description	Language
	Block Diagram	AS1170 block diagram
	Image	AS1170 product image (top perspective)