U8600B

www.DataSheet4U.com U8600B Laser Controller Description The U8600B is a monolithic integrated circuit using TEMIC’s advanced UHF technology. The IC is a very high-speed, mixed–signal laser driver circuit for re-writable optical systems. It comprises a servo amplifier to drive the laser diode, a high-frequency modulator for noise reduction, power and pulse-width generators as well as several operation control and safety functions. Features D Single + 5 V power supply D Data transfer rates up to 16 Mb/s D Servo system – High bandwidth: 100 MHz – High dc gain: 110 dB – High LD drive current: typ. 100 mA, max. 180 mA – High slew rate: 5 ns rise/ fall time – Servo gain adjustable D Noise reduction by servo loop and weak highfrequency modulation D On-chip generation of power levels for read, erase, and write operations D On-chip generation of write and off-pulse widths: 15 to 90 ns, 5 ns steps D Digital control of power and pulse parameters via a serial 3-wire interface D Basic power level adjustable D Supervision of power supply, laser current and laser power D Laser shutdown to prevent laser damage and data loss Package: 44-lead shrinked small-outline IC (SSO44) Thermal resistance: RthJC = 22°C/W Block Diagram 40 41 GND GADJ 38 39 44 43 19 18 4 23 16 PDK LDK IRef VMON LD off EXTM WDATA WGATE OPEENB VDM DCLK read 1 ISET erase write Serial interface Pulse-width generators DCLK iref Buffer error signal current limit Operation control unit Servo amplifier HF Mod. WGATE HFV HFE EX...