NJW4702
3ch Laser Diode Driver
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GENERAL DESCRIPTION
NJW4702
is a laser diode driver for the operation of a grounded
laser diode for CD-R and CD-RW drivers.
It includes three channels current amplifiers for three different
optical power levels. Reference inputs are voltage input, and
voltage control is possible without external resistors. An on-chip RF
oscillator is provided to reduce laser mode noise during read mode.
Oscillation frequency and oscillation amplitude are defined by two
external resistors.
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FEATURES
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Operating Voltage
4.5V to 5.5V
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On-chip RF Oscillator
200MHz to 500MHz
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Rise-time/Fall-time
1.0ns typ.
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Maximum Output Current 250mA typ.
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Bi-CMOS Technology
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Package Outline
PCSP16(3.5mm 0.65mm pitch)
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BLOCK DIAGRAM
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PACKAGE OUTLINE
NJW4702SE8
IOUT
12
GND
11
RAMP
10
ENABLE
9
H:ON
VCC2 13
H:ON
L:ON
L:ON
8 OSCEN
GND 14
OSC
BIAS
7 VCC1
GND 15
6 GND
VINR 16
5 OUTEN3
1
RFREQ
2
VIN2
3
VIN3
4
OUTEN2
Ver.1
-1-
1
2
3
4
