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TD340 Datasheet(PDF) 1 Page - STMicroelectronics |
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TD340 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 21 page 1/21 s QUAD N-CHANNEL MOSFET DRIVE s INTEGRATED CHARGE PUMP FOR HIGH SIDE MOSFET DRIVING s VERY LOW GROUND EMI NOISE s MOTOR SPEED AND DIRECTION CON- TROL (LOW SIDE PWM) s INTERNAL OR EXTERNAL PWM SOURCE s 25kHz SWITCHING FREQUENCY ABILITY s SYNCHRONOUS HIGH SIDE RECTIFICA- TION s REVERSED BATTERY ACTIVE PROTEC- TION ABILITY s INTEGRATED 5V POWER SUPPLY FOR MICROCONTROLLER s INTEGRATED SECURITY CIRCUITS: UVLO, OVLO, WATCHDOG s 60V MAX RATING DESCRIPTION The TD340 integrated circuit allows N-Channel Power Mosfets driving in a full H-bridge configuration and is best suited for DC Motor Control Applications. The four drivers outputs are designed to allow 25kHz MOSFET switching. The speed and direction of the motor are to be set by two pins. Voltage across the motor is controlled by low side Pulse Width Modulation (PWM). This PWM feature can be made internally when the input pin is connected to an analog signal, or it can be given directly from a digital source. An internal charge pump allows proper upper MOS driving for full static operation (100% PWM). TD340 achieves very low EMI noise thanks to its balanced charge pump structure and its drivers moderate slew rate. To avoid excessive heating due to free wheeling, appropriate synchronous rectification is achieved on the corresponding High Side MOSFET. Moreover, TD340 integrates a 5V voltage regulator suitable as a power supply output for the microcontroller, a Reset circuit and a Watchdog circuit. Security functions disable the TD340 (MOS off) when abnormal conditions occur like overvoltage, undervoltage or CPU loss of control (watchdog). TD340 withstands transients as met in automotive field without special protection devices thanks to its 60V BCD technology. ORDER CODE D= Small Outline Package (SO) - also available in Tape & Reel (DT) PIN CONNECTIONS (top view) Part Number Temperature Range Package D TD340ID -40 °C, +125°C • D SO20 (Plastic Micropackage) VBATT VOUT RESET CWD WD STBY TEMP IN1 IN2 CF GND L1 L2 S2 H2 CB2 S1 H1 CB1 OSC 10 9 8 7 6 5 4 3 2 1 11 12 13 14 15 16 17 18 19 20 TD340 H-BRIDGE QUAD POWER MOSFET DRIVER FOR DC MOTOR CONTROL This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. May 2000 PRELIMINARY DATA |
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