M66512P Datasheet | Mitsubishi Electric

MITSUBISHI MITSUBISHI 〈DIGITAL 〈DIGITAL ASSP ASSP 〉 〉 M66512P/FP M66512P/FP LASER-DIODE DRIVER LASER-DIODE DRIVER 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 voltage from an external source. the M66512 is capable of driving laser diodes on a maximum current of 120 m A. 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. (parator output and analog output) - Pin provided for forced OFF of current circuit. - High speed switching (40 Mbit/s) - Large drive current (120m A max.) - 5V single power supply APPLICATION Laser beam printers PIN CONFIGURATION (TOP VIEW) VCC1 CURRENT SETTING INPUT 1 VL1 CURRENT SETTING LOAD OUTPUT 1 1RC CURRENT SETTING INPUT 2 VL2 CURRENT SETTING LOAD OUTPUT 2 2RC LASER CURRENT FORCED OFF INPUT VOFF CURRENT SETTING LOAD OUTPUT 3RC GND1 MONITORING LOAD INPUT 1 1RM MONITORING LOAD INPUT 2 2RM 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 RO LOAD OUTPUT NC LD LASER DIODE OUTPUT GND2 PD MONITORING DIODE INPUT DATA DATA INPUT VCC2 MONITORING CO PARATOR OUTPUT ANALOG MO MONITORING OUTPUT NC LASER CURRENT Outline 20P4 20P2N-A NC: No Connection M66512P/FP BLOCK DIAGRAM MONITORING OUTPUT MO 12 Linear amp PARATOR OUTPUT CO 13 parator (Vref=1.4V) PD 16 LD 18 RO 20 1RM 9 2RM 10 VL1 2 1RC 3 VL2 4 2RC 5 Differential amp Current switching circuit 15 DATA DATA INPUT IL=IL1+IL2+IL3 Constant current source(IL1) Max.60m A Constant current source(IL2) Max.30m A Constant current source(IL3) Max.30m A 6 VOFF LASER CURRENT FORCED OFF 1 VCC1 14 VCC2 8 GND1 17...