○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

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TSZ02201-0G3G0C200060-1-2

9.NOV.2012 Rev.001

www.rohm.com

© 2012 ROHM Co., Ltd. All rights reserved.

TSZ22111･14･001

Datasheet

Constant Current LED Driver

with 64 Dimming Steps for up to 4 LEDs

BD1754HFN

●General Description

The multi-level brightness control LED works as a

constant current driver in 64 steps, so that the driving

current can be adjusted finely. BD1754HFN is best

suited to turn on LEDs that require high-accuracy LED

brightness control.

●Features

 Current regulation for LED up to 4 parallels

 Adjustable constant current 64 steps

 High accuracy and matching of each current

channel (0.5% Typ.)

 Brightness control via a single-line digital control

interface (Uni-Port Interface Control = UPIC)

●Applications

This driver can be used in various fields such as

mobile phones, portable game machines and etc.

●Typical Application Circuit

●Key Specification

 Operating power supply voltage range: 2.7V to 5.5V

 Quiescent Current:

0.1

μA (Typ.)

 Operating temperature range:

-30°C to +85°C

●Package W(Typ.) x D(Typ.) x H(Max.)

Figure 2. Application Circuit

HSON8

2.90mm x 3.00mm x 0.60mm

Figure 1. HSON8

BD1754HFN

VIN

ISET

GND

EN

L4

L3

L2

L1

Power Supply

0.1µF

120k

Ω

(When ILED-max =32mA)

Cin