TDA5345HT

INTEGRATED CIRCUITS DATA SHEET TDA5345HT 5 V spindle & VCM driver combo Preliminary specification 1999 June 10 Philips Semiconductors Preliminary specification 5 V spindle & VCM driver combo FEATURES Single chip voice coil and spindle motor drivers: Complementary outputs (Nmos & Pmos): No step-up converter needed On-chip isolation switch to allow synchronous rectification at power-down Suited for ramp load operation Register based architecture: on-chip serial interface Temperature shut down protection Linear 3.3 V regulator using one external NPN transistor Power monitor circuitrymonitoring the 5 V supply 1 axis shock sensor amplifier Switched capacitor regulator (-3 V) using 2 external capacitors and 2 external shottky diodes All main internal functions can be independently put in Sleep mode Small low profile package: TQFP64 (1.2 mm high). Spindle motor driver: High efficiency drivers: 1.5 Ω Max 0.62 Amp capability, full wave (bipolar) drive Internal current mirrors to measure the motor curren Controlled fly-back pulse slopes, programmable through the serial interface Active fly-back pulse limitation, using the Power MOS instead of diodes Internal digital timing to control the commutations by back-EMF sensing (Start-up & running) Internal speed loop combining FLL and PLL Start-up current control by an internal 6-bit DAC (shared with the VCM loop). Voice coil motor (VCM) driver: High efficiency drivers: 1.5 Ω Max (without the exter...