NXP Semiconductors TDA5345HT
The TDA5345HT is a combination of a voice coil motor and a spindle motor driver, designed for 5 V high performance portable small form factor hard disk drives. The serial port and the power monitor are the only functions which remain always active. The TDA5345HT integrates a spindle driver and the commutation logic that drives a three-phase brushless, sensorless DC motor in full wave mode.| Part No. | TDA5345HT |
|---|---|
| Datasheet | TDA5345HT Download |
| Manufacturer |  NXP Semiconductors |
| Description | 5 V spindle & VCM driver combo |
| Buy | Stock & Price |
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...
