AS1181 datasheet(30/92 Pages) AMSOSRAM

Part #	AS1181

Description	8-channel LED/VCSEL driver with enhanced safety features

PDF	92 Pages

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Manufacturer	AMSOSRAM [ams-OSRAM AG]

Direct Link	https://ams-osram.com/

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30 / 92 page

AS1181

Functional description

Datasheet • PUBLIC • Document Feedback

DS001139 • v3-00 • 2026-Apr-01

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7.2

Safety monitors

AS1181 integrates several safety features to detect open or shorted LEDs and to avoid

unwanted overcurrent situations also under single fault conditions.

Safety features are implemented on the high side (LP - Anode) and low side (LNx - Cathode)

of the LEDs as shown in the detailed block diagram below. All safety features are operating

fully self-contained and do not require an external host to shut down illumination.

Figure 30: Block diagram safety monitors

VLED

LN0-

LN7

VP2

VP18

VGMAX

V_FB_MAX

reference

ref

VLED_FB_UV

VON

VGATE_MAX

GATE_LOW

VSHORT

VOPEN

V_FB_MIN

10µA

Open/Short

VLED_FB_OV

VLED_OV

VLED_OPEN

~50mV

Iref

short

short LP

short LP Test

Iref

short vss

250R x 256

8bit

Power Switch /

over current

detection

LDO

over current

AS1181 Datasheet(PDF) 30 Page - ams-OSRAM AG

AS1181 Datasheet(HTML) 30 Page - ams-OSRAM AG

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