TD340

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 toallow 25kHz MOSFET switching.

The speedand directionofthe motor aretobe set by twopins.Voltage across themotor iscontrolled by low side Pulse Width Modulation (PWM). This PWM feature can be made internally when the input pinis connectedtoananalogsignal,or itcan be given directly from a digital source.

An internal charge pump allows proper upper MOS driving for fullstatic 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 HighSide MOSFET.

Moreover, TD340 integrates a 5V voltage regulator suitableasa powersupplyoutput forthe microcontroller, a Reset circuit and a Watchdog circuit.

Security functions disable the TD340 (MOS off) when abnormal conditionsoccur like overvoltage,undervoltage or CPU loss of control (watchdog).

TD340 withstandstransients asmet inautomotive field without special protection devices thanks to its 60V BCD technology.