M66516FP Datasheet, PDF (1/10 Pages) Mitsubishi Electric Semiconductor – LASER-DIODE DRIVER/CONTROLLER

MITMSUITBSIUSBHIS〈HDIG〈DITIAGLITALSSAPS〉SP〉
M665M16665F1P6FP
DESCRIPTION
The M66516 is a semiconductor laser-diode driver/controller.
Its functions are the driving and laser power control of a spe-
cific type (Mitsubishi’s R type laser) of semiconductor laser
diode, in which the cathode of a semiconductor laser diode is
connected in stem structure to the anode of a monitoring
photodiode.
The IC has a laser drive current output pin of source type and
is capable of driving a laser diode on a maximum bias current
of 30mA and a maximum switching current of 120 mA, which
is switched at a rate of 20Mbits/sec.
Since the M66516 has a built in sample-hold circuit, it is pos-
sible to realize an internal APC^∗ system that requires no ex-
ternal device for laser power control.
∗: Automatic Power Control
FEATURES
• Built-in sample-hold circuit for APC function
• High speed switching (20Mbps)
• Large drive current (150mA max.)
• Capable of setting bias current (30mA max.)
• 5V single power supply
APPLICATION
Semiconductor laser-diode applied equipment
LASLEARS-DEIRO-DDEIODDREIVDERRIV/CEORN/CTORNOTLRLOERLLER
PIN CONFIGURATION (TOP VIEW)
VCC1 1
→ SWITCHING CURRENT
SETTING INPUT 1
VL1
2
← ^{OUTPUT TO SWITCHING}
CURRENT SETTING LOAD
1RC
3
→ ¹
SWITCHING CURRENT
VL2
4
← ^{SETTING INPUT 2}
OUTPUT TO SWITCHING
2RC
5
→ CURRENT SETTING LOAD
2
ENB
6
← LASER CURRENT
ENABLE INPUT
3RC
7
OUTPUT TO BIAS
CURRENT SETTING LOAD
GND1
8
1RM→ 9
MONITORING LOAD ^{2RM→ 10}
INPUTS _{MO← 11}
MONITORING ANALOG
OUTPUT
MONITORING
COMPARATOR OUTPUT
CO← 12
24 → RO
23 → LD
22 NC
OUTPUT TO LASER
CURRENT LOAD
LASER CURRENT
OUTPUT
21 ← PD
MONITORING DIODE
INPUT
20 GND2
→ 19
Vref
REFERENCE VOLTAGE
OUTPUT
← 18
Vr
REFERENCE VOLTAGE
INPUT
17
← DATA
SWITCHING
INPUT
DATA
16
CD
DUTY CONTROL
INPUT
15 VCC2
14
CSH
CONNECTION PIN FOR
SAMPLE-HOLD CAPACITOR
13 ← S/H
SAMPLE-HOLD
CONTROL INPUT
Outline 24P2N-B
NC: No Connection
BLOCK
DIAGRAM
MONITORING
COMPARATOR OUTPUT
MONITORING
ANALOG OUTPUT
REFERENCE
VOLTAGE OUTPUT
CO
MO
Vref
RO
12
11
19
24
COMPARATOR
Vr 18
VL1 2
SWITCHING CURRENT _VL2 4
SETTING INPUTS
1RC 3
2RC 5
LINEAR AMP
REFERENCE
VOLTAGE
SOURCE
SWITCHING
CURRENT
SOURCE
3RC ⁷
BIAS CURRENT
SOURCE
1
VCC
15
8
GND
20
DIFFERENTIAL
AMP
SAMPLE-HOLD
CIRCUIT
CURRENT
SWITCHING
CIRCUIT
9
10 13
14
21
23
16
17
6
1RM 2RM S/H
CSH
PD
LD
CD
DATA
ENB
MONITORING SAMPLE-HOLD CONNECTION MONITORING OUTPUT TO DUTY CONTROL SWITCHING LASER CURRENT
LOAD INPTUT CONTROL INPUT PIN FOR DIODE INTPUT LASER
INPUT
DATA INPUT ENABLE INPUT
SAMPLE-HOLD
CURRENT LOAD
CAPACITOR
1