DESCRIPTION

The TD300 is designed to drive one, two or three Power IGBT/MOS and has driving capability for pulse transformer. So it is perfectly suited to interface control IC with Power Switches in low side or half-bridge configuration.

The typical application shown figure 1 implements the TD300 in a pulse controlled half-bridge drive. Positive and negative pulses are applied to the pulse transformer to charge and discharge the IGBT/MOS gate capacitance. More sophisticated secondary circuits provide low impedance gate drive and short-circuit protection as shown in application note AN461.

On Figure 2, TD300 is implemented as a low side driver in a typical 3 phase motor drive. Figure 3 presents a general purpose low side gate drive.

In both case, the current amplifier provides interfacing between a sense resistor and an A/D converter.

■ THREE POWER IGBT/MOS OR PULSE TRANSFORMER DRIVERS

■ CURRENT SENSE COMPARATOR WITH 1ms INHIBITION TIME FUNCTION

■ INSTANTANEOUS SIGNAL TRANSMISSION

■ 0.6 Amp PER CHANNEL PEAK OUTPUT CURRENT CAPABILITY

■ LOW OUTPUT IMPEDANCE TYP : 7? at 200mA

■ CMOS/LSTTL COMPATIBLE INVERTING IN PUT WITH HYSTERESIS

■ 13V TO 16V SINGLE SUPPLY OPERATION

■ UNDER VOLTAGE LOCKOUT (12.5V)

■ CURRENT AMPLIFIER

■ LOW BIAS CURRENT TYP : 1.5mA

■ DURING POWER UP NO RANDOM OUTPUT STATE

■ ENHANCED LATCH-UP IMMUNITY

■ CHANNEL PARALLELING CAPABILITY