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TDA5144AT Datasheet(PDF) 2 Page - NXP Semiconductors |
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TDA5144AT Datasheet(HTML) 2 Page - NXP Semiconductors |
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2 / 20 page  June 1994 2 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5144 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.) – low saturation voltage – built-in current limiter – soft-switching outputs for low Electromagnetic Interference (EMI) • Thermal protection • Flyback diodes • Tacho output without extra sensor • Transconductance amplifier for an external control transistor. APPLICATIONS • General purpose spindle driver (e.g. for hard disk) • Laser beam printer. GENERAL DESCRIPTION The TDA5144 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. A special circuit is built-in to reduce the EMI (soft switching output stages). It is ideally suited as a drive circuit for hard disk drive spindle motor requiring powerful output stages (current limit of 2.0 A). It can also be used in e.g. laser beam printer and other applications. 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 2.4 A TYPE NUMBER PACKAGE PINS PIN POSITION MATERIAL CODE TDA5144AT 20 SOL plastic SOT163-1 TDA5144T 28 SOL plastic SOT136-1 |
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