MC34932EKR2

The 34932 is a monolithic H-Bridge Power IC in a robust thermally enhanced package. The 34932 has two independent monolithic H-Bridge Power ICs in the same package. They are designed for any low voltage DC servo motor control application within the current and voltage limits stated in this specification. This device is powered by SMARTMOS technology. Each H-Bridge in the 34932 is able to control inductive loads with currents up to 5.0 A peak. RMS current capability is subject to the degree of heatsinking provided to the device package. Internal peak current limiting (regulation) is activated at load currents above 6.5 A ±1.5 A. Output loads can be pulse-width modulated (PWMed at frequencies up to 20 kHz. A load current feedback feature provides a proportional (0.24% of the load current) current output suitable for monitoring by a microcontroller’s A/D input. A status flag output reports undervoltage, overcurrent, and overtemperature fault conditions. Two independent inputs provide polarity control of two half-bridge totem pole outputs. Two independent disable inputs are provided to force the H-Bridge outputs to tri-state (high-impedance off state).

• 5.0 V to 36 V continuous with 24 V nominal operating voltage (transient operation from 5.0 V to 40 V)
• 235 mO maximum RDS(on) at TJ = 150 °C (each H-Bridge MOSFET)
• 3.0 V and 5.0 V TTL/CMOS logic compatible inputs
• Output short-circuit protection (short to VPWR or GND)
• Overcurrent limiting (regulation) via internal constant-off-time PWM
• Temperature dependant current limit threshold reduction to allow for continuous operation without shutdown
• All inputs have an internal source/sink to define the default (floating input) states
• Sleep mode with current draw < 20 µA (each half with inputs floating or set to match default logic states)