ISL1903 Datasheet, PDF(7/19 Page) Intersil Corporation – Dimmable Buck LED Driver

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ISL1903 Datasheet, PDF (7/19 Pages) Intersil Corporation – Dimmable Buck LED Driver - AC Mains or DC Input LED Driver

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ISL1903

Pin Descriptions (Continued)

PIN #

SYMBOL

DESCRIPTION

PWMOUT The PWM gate drive output for LED dimming. The output level is clamped to ~12V for VDD greater than 12V. PWMOUT has

pull-down capability when UVLO is active or when the IC is not biased. This output is used to drive an external dimming FET.

The PWM operates at ~ 310Hz.

OUT The gate drive output for the external power FET. OUT is capable of sourcing and sinking 1A @ VDD = 8V. The output level is

clamped to ~12V for VDD greater than 12V. OUT has pull-down capability when UVLO is active or when the IC is not biased.

Ordering Information

PART NUMBER

(Notes 1, 2, 3)

PART

MARKING

TEMP. RANGE

(Â°C)

PACKAGE

(Pb-free)

PKG.

DWG. #

ISL1903FAZ

1903 FAZ

-40 to +125

16 Ld QSOP

M16.15A

ISL1903EVAL2Z

Evaluation Board

1. Add â-T*â suffix for tape and reel. Please refer to TB347 for details on reel specifications.

2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte

tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil

Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

3. For Moisture Sensitivity Level (MSL), please see device information page for ISL1903. For more information on MSL please see tech brief TB363.