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TDA5145T Folha de dados(PDF) 2 Page - NXP Semiconductors |
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TDA5145T Folha de dados(HTML) 2 Page - NXP Semiconductors |
2 / 24 page June 1994 2 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5145 FEATURES • Full-wave commutation (using push/pull drivers at the output stages) without position sensors • Built-in start-up circuitry • Three push-pull outputs: – output current 2.0 A (typ.) – built-in current limiter – soft-switching outputs for low Electromagnetic Interference (EMI) • Thermal protection • Flyback diodes • Tacho output without extra sensor • Motor brake facility • Direction control input • Reset function • Transconductance amplifier for an external control transistor. APPLICATIONS • General purpose spindle driver e.g.: – Hard disk drive – Tape drive – Optical disk drive. GENERAL DESCRIPTION The TDA5145 is a bipolar integrated circuit used to drive 3-phase brushless DC motors in full-wave mode. The device is sensorless (saving of 3 hall-sensors) using the back-EMF sensing technique to sense the rotor position. It includes bidirectional control, brake function and has a special circuit built-in to reduce the EMI (soft switching output stages). QUICK REFERENCE DATA Measured over full voltage and temperature range. Notes 1. An unstabilized supply can be used. 2. VVMOT = VP; +AMP IN = −AMP IN = 0 V; all outputs IO = 0 mA. ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP supply voltage note 1 4 − 18 V VVMOT input voltage to the output driver stages note 2 1.7 − 16 V VDO drop-out output voltage IO = 100 mA − 0.90 1.05 V ILIM current limiting VVMOT = 10 V; RO = 1.2 Ω 1.8 2.0 2.5 A TYPE NUMBER PACKAGE PINS PIN POSITION MATERIAL CODE TDA5145 28 DIL plastic SOT117-1 TDA5145T 28 SOL plastic SOT136-1 |
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