L9929 Rectifier Diode SPI CONTROLLED H-BRIDGE single phase bridge rectifier

L9929 SPI CONTROLLED H-BRIDGE single phase bridge rectifier

1 Features

■ OPERATING SUPPLY VOLTAGE 5V TO 28V

■ TYPICAL RDSon = 150 mΩ FOR EACH OUTPUT TRANSISTOR (AT 25°C)

■ CONTINOUS DC LOAD CURRENT 5A (Tcase < 100 °C)

■ OUTPUT CURRENT LIMITATION AT TYP. 8.6A

■ SHORT CIRCUIT SHUT DOWN FOR OUTPUT CURRENTS OVER TYP. 10.6A

■ LOGIC- INPUTS TTL/CMOS-COMPATIBLE

■ OPERATING-FREQUENCY UP TO 30 kHz

■ OVER TEMPERATURE PROTECTION

■ SHORT CIRCUIT PROTECTION

■ UNDERVOLTAGE DISABLE FUNCTION

■ DIAGNOSTIC BY SPI OR STATUS-FLAG (CONFIGURABLE)

■ ENABLE AND DISABLE INPUT

■ SO20 POWER PACKAGE

2 Description

The L9929 is an SPI controlled H-Bridge, designed for the control of DC and stepper motors in safety critical applications and under extreme environmental conditions.

The H-Bridge is protected against over temperature and short circuits and has an under voltage lockout for all the supply voltages "VS" (Main DC power supply). All malfunctions cause the output stages to go tristate.

The H-Bridge contains integrated free-wheel diodes. In case of free-wheeling condition, the low side transistor is switched on in parallel of its diode to reduce the current injected into the substrate. Switching in parallel is only allowed, if the voltage level of the according output-stage is below the ground-level. In this case it must be ensured, that the upper transistor is switched off.

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