M66515FP Datasheet | Mitsubishi Electric

MITSUBISHI MITSUBISHI 〈DIGITAL 〈DIGITAL ASSP ASSP 〉 〉 M66515FP M66515FP LASER-DIODE DRIVER/CONTROLLER LASER-DIODE DRIVER/CONTROLLER DESCRIPTION The M66515 is a semiconductor laser-diode driver/controller. Its functions are the driving and laser power control of a specific type (Mitsubishi’s N type laser) of semiconductor laser diode, in which the anode of a semiconductor laser diode is connected in stem structure to the cathode of a monitoring photodiode. The IC has a laser drive current output pin of sink type and is capable of driving a laser diode on a maximum bias current of 30m A and a maximum switching current of 120m A, which is switched at a rate of 40Mbit/s. Since the M66515 has a built in sample-hold circuit, it is possible to realize an internal APC∗ system that requires no external device for laser power control. ∗: Automatic Power Control Features - Built-in sample-hold circuit for internal APC function - High speed switching (40Mbps) - Large drive current (150m A max.) - Capable of setting bias current (30m A max.) - 5V single power supply APPLICATION Semiconductor laser-diode applied equipment PIN CONFIGURATION (TOP VIEW) OUTPUT TO SWITCHING CURRENT SETTING LOAD OUTPUT TO BIAS CURRENT SETTING LOAD BIAS CURRENT SETTING VOLTAGE INPUT REFERENCE VOLTAGE OUTPUT REFERENCE VOLTAGE INPUT HOLDING CAPACITANCE LOAD INPUT/OUTPUT SAMPLE-HOLD CONTROL INPUT RS ← GND1 RB ← Vref ← CH ← → Vr → VB → S/H → VCC1 TEST PIN TEST 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC2 → RO LASER CURRENT LOAD OUTPUT LASER CURRENT OUTPUT Outline 20P2N-A NC: No Connection → LD GND2 MONITORING DIODE ← PD INPUT ← DATA SWITCHING DATA INPUT CURRENT ← ENB LASER ENABLE INPUT ← 2RM  MONITORING LOAD INPUT ← 1RM   BLOCK DIAGRAM        MONITORING LOAD INPUT 1RM 11 2RM 12 MONITORING DIODE INPUT PD 15 IPD LASER CURRENT REFERENCE LASER CURRENT OUTPUT VOLTAGE OUTPUT LOAD RESISTOR Vref RO LD 17 19...