NJW4702 Datasheet, PDF (1/4 Pages) New Japan Radio – 3ch Laser Diode Driver

NJW4702
3ch Laser Diode Driver
sGENERAL 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.
sPACKAGE OUTLINE
NJW4702SE8
sFEATURES
q Operating Voltage
4.5V to 5.5V
q On-chip RF Oscillator
200MHz to 500MHz
q Rise-time/Fall-time
1.0ns typ.
q Maximum Output Current 250mA typ.
q Bi-CMOS Technology
q Package Outline
PCSP16(3.5mm 0.65mm pitch)
sBLOCK DIAGRAM
IOUT
12
GND
11
RAMP
10
ENABLE
9
VCC2 ₁₃
GND ₁₄
H:ON L:ON L:ON
GND ₁₅
H:ON
8 ^OSCEN
OSC
7 ^VCC1
BIAS
6 ^GND
VINR ₁₆
5 ^OUTEN3
1
RFREQ
2
VIN2
3
VIN3
4
OUTEN2
Ver.1
-1-