Automotive DC Motor Driver IC


PT12493

The PT12493 is an integrated multi-channel half-bridge drivers with 8 half-bridges. The device features low on- state resistance (RDS(ON)) for improved thermal performance during high-current operation. This device can drive brushed-DC (BDC) motors or stepper motors in independent, sequential, or parallel mode. The half-bridges are fully controllable to achieve a forward, reverse, coasting and braking operation of motor.

This device feature standard 16-bit, 5-MHz serial peripheral interface (SPI) with daisy chain capability for complete configuration and detailed diagnostics. The device has eight programmable PWM generators are integrated to allow for current limiting during motor operation or LED dimming control.

The device includes numerous protection and diagnostic features including an FALTN pin to alert the system when a fault occurs. The device features a low-current open load detection (OLD) mode to detect open-load conditions when the nominal load current is small and a passive OLD mode for offline OLD. The device is also fully-protected from short- circuit, under-voltage, and over-temperature conditions.

FEATURES


● 8 half-bridge outputs

● 4.5-V to 32-V operating voltage

- 40-V absolute maximum voltage

● 1-A RMS current for each output

- 6-A maximum current for paralleled outputs

● Low-power sleep mode (1.5-µA)

● Supports 3.3-V and 5-V logic inputs

● SPI for configuration and diagnostics

- 5-MHz, 16-Bit SPI communication

- Daisy chain functionality

● PWM generators programmable over SPI

- Individual half-bridge PWM operation

- Configurable for high-side, low-side, and H-bridge load driving

- Supports 8-bit duty cycle resolution

● Integrated protection features with per channel detailed diagnostics over SPI

- FALTN pin output

- VM undervoltage lockout (UVLO)

- VM overvoltage protection (OVP)

- Logic supply power on reset (POR)

- Overcurrent protection (OCP)

- Enhanced open load detection (OLD)

- Thermal warning and shutdown (OTW/OTSD)

● Package Type- HTSSOP 24 (with exposed thermal pad)

APPLICATIONS


● HVAC flap DC motors

● Side mirror adjustment and mirror fold

● LED applications

● Multiple brushed DC motors and solenoids

資源下載

Documentation

Tools

Application Note