AS3490 datasheet(13/19 Pages) AMSCO

Part #	AS3490

Description	Highly Efficient 2-6 LEDs Backlight Driver with PWM Input

PDF	19 Pages

Scroll/Zoom	100%

Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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13 / 19 page

www.austriamicrosystems.com/AS3490

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AS3490

Datasheet - D e ta i l e d D e s c r i p t i o n

Figure 18. Single Open LED detection

Figure 19. All LEDs open

Protection and Fault Detection Functions

The protection functions protect the AS3490, its external components and connected LEDs against physical damage.

Overvoltage Protection

The voltage on VOUT is kept below or at VVOUT_MAX under every operating condition

6. If the voltage on VOUT is at

VVOUT_MAX for more than 70ms

7, the DCDC will shutdown. It can be re-enabled by setting ON to low for more than

tTIMEOUT.

6. When reaching VOUT=VVOUT_OPENLED, the open LED detection is performed.

7. The duration can vary from 55ms to 85ms within a single AS3490.

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AS3490 Datasheet(PDF) 13 Page - ams AG