M66512 データシートの表示（PDF） - Mitsumi

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M66512

LASER-DIODE DRIVER

Mitsumi 

MITMSITUSBUISBHISI H〈DI I〈GDIITGAITLAALSASSPS〉 P〉

M665M1626P51/2FPP/FP

DESCRIPTION

The M66512 is a semiconductor laser-diode driver for driving

a specific type* of semiconductor laser, in which the anode of

a semiconductor laser diode is connected in stem structure to

the cathode of a monitoring photodiode.

The amplitude of laser drive current is set by applying a volt-

age from an external source. the M66512 is capable of driv-

ing laser diodes on a maximum current of 120 mA.

It operates on a 5-V single power supply and switches laser

drive current at a rate of 40 Mbit/s.

*: The N type of Mitsubishi’s semiconductor lasers.

FEATURES

• Two kinds of outputs for monitoring laser power built in.

(comparator output and analog output)

• Pin provided for forced OFF of current circuit.

• High speed switching (40 Mbit/s)

• Large drive current (120mA max.)

• 5V single power supply

APPLICATION

Laser beam printers

LASLAESRE-DRI-ODDIOEDDERDIVREIVRER

PIN CONFIGURATION (TOP VIEW)

VCC1 1

CURRENT SETTING INPUT 1 VL1 2

CURRENT SETTING LOAD OUTPUT 1 1RC 3

CURRENT SETTING INPUT 2 VL2 4

CURRENT SETTING LOAD OUTPUT 2 2RC 5

LASER CURRENT

FORCED OFF INPUT

VOFF

6

CURRENT SETTING LOAD OUTPUT 3RC 7

GND1 8

MONITORING LOAD INPUT 1 1RM 9

MONITORING LOAD INPUT 2 2RM 10

20

RO

LASER CURRENT

LOAD OUTPUT

19 NC

18 LD LASER DIODE OUTPUT

17 GND2

16 PD MONITORING DIODE INPUT

15 DATA DATA INPUT

14 VCC2

13

CO

MONITORING

COMPARATOR OUTPUT

12

MO

MONITORING

OUTPUT

ANALOG

11 NC

Outline 20P4

20P2N-A

NC: No Connection

BLOCK DIAGRAM

MONITORING

COMPARATOR

OUTPUT

OUTPUT

MO

CO

PD

LD

RO

12

13

16

18

20

Linear amp

Comparator

(Vref=1.4V)

1RM 9

2RM 10

Differential

amp

VL1 2

1RC 3

VL2 4

2RC 5

3RC 7

Constant current

source(IL1)

Max.60mA

Constant current

source(IL2)

Max.30mA

Constant current

source(IL3)

Max.30mA

Current switching circuit

15 DATA

DATA INPUT

IL=IL1+IL2+IL3

6 VOFF

LASER CURRENT

FORCED OFF

1 VCC1

14 VCC2

8 GND1

17 GND2

VL1, 1RC : Laser current (IL1) setting pin

VL2, 2RC : Laser current (IL2) setting pin

3RC : Laser current (IL3) setting pin

VCC1, GND1 : Power supply pin for analog circuits in IC

VCC2, GND2 : Power supply pin for digital circuits in IC

1

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