Triple IGBT/MOS driver includes all interface functions

SGS-THOMSON Microelectronics has expanded its TD300 family of power drivers with the introduction of the TD310, a triple IGBT/MOS driver IC that integrates all of the functions required to drive up to three power MOSFETs or IGBTs from CMOS or LSTTL logic signals. The three inverting power buffers, which can be connected in parallel for increased drive capability, are rated at 0.6A peak output current per channel, allowing a very wide range of power devices with gate capacitances up to 4nF or more to be controlled.

The TD310 integrates all of the key interface functions such as an adjustable undervoltage lockout circuit, a current sense comparator with an alarm output, an enable input, enhanced latch-up immunity and an op amp that can be used to interface the current sense resistor to an ADC such as is typically built into MCUs. It therefore requires only a minimal number of external passive components, leading to simpler design, reduced PCB area and better reliability than more expensive discrete solutions in a wide variety of motor driving, power switching and high voltage level shifting applications.

Other key features of the device include low consumption (1.5mA, typical), a low power standby mode where current is reduced to only 30mA, a wide (4 to 16V) power supply range and an operating temperature range of -40 to 125C.

The availability of three independent drivers allows the TD310 to be used in a variety of motor control topologies, either as a triple low-side driver or as a half-bridge driver using a small external pulse transformer. For example, speed control of a 2-phase induction motor can be achieved with two TD310s and four power MOSFETs, each TD310 controlling one leg of the bridge by using one output for the low side MOSFET and two (via a pulse transformer) for the high side MOSFET. The TD310 also provides a highly integrated and effective solution with permanent magnet brushless DC motors or the emerging switched reluctance motors.

Offered in DIP16 and surface mounting SO16 packages, the TD310 is fully supported by an evaluation board and a set of application notes.

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