iC-WJB

2.7 V LASER DIODE DRIVER

Rev E1, Page 1/12

FEATURES

o Simple APC adjustment via an external resistor

o Continuous (CW) or pulsed operation of up to 300 kHz

o Laser diode current of up to 100 mA

o Adjustable watchdog for input signals

o Soft power-on and thermal protection

o Driver shutdown in case of overtemperature and undervoltage

o Operation at 2.7 to 6 V with two to four AA/AAA cells

o Protection against reverse polarity

APPLICATIONS

o Battery supplied LD modules

o LD Pointers

PACKAGES

SO8

MSOP8

BLOCK DIAGRAM

(VCC > 4.5 )

iC−WJB

REF

VCC

REFERENCE

WATCHDOG

THERMAL

POWER DOWN

INPUT

DRIVER STAGE

REF

3

CI

CWD

AMD

ISET

GND

CWD

IN

CI

KLD

VCC

2.7..6V

MD

LD

47uF

C1

2

Ω

R2

Z6V8

D1

4

6

2

3

1

1

7

8

5

SHUTDOWN

VB

MD

LD

R1

2nF

C3

0..2

Ω

RSET

2.7..330k

Ω

470nF

(..pF)

alternative LD model

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