• Eight Low-Side Drivers With Internal Clamp for Inductive Loads and Current Limiting for Self Protection
  • Seven Outputs are Rated at 150 mA and Controlled Through Serial Interface
  • One Output Rated at 150 mA and Controlled Through Serial Interface and Dedicated Enable Pin
• 5-V ±5% Regulated Power Supply With 200-mA Load Capability at VIN Max of 18 V
• Internal Voltage Supervisory for Regulated Output
• Serial Communications for Control of Eight Low-Side Drivers
• Enable/Disable Input for OUT1
• 5-V or 3.3-V I/O Tolerant for Interface to Microcontroller
• Programmable Power On-Reset Delay Before RST Asserted High, Once 5 V Is Within Specification (6 ms Typ)
• Programmable Deglitch Timer Before RST Is Asserted Low (40 µ Typ)
• Programmable Brown-Out Feature
• Thermal Shutoff for Self Protection
• APPLICATIONS
  • Electrical Applicances
    • Air Conditioning Units
    • Ranges
    • Dishwashers
    • Refrigerators
    • Microwaves
    • Washing Machines
  • General-Purpose Interface Circuit Allowing Microcontroller Interface to Relays, Electric Motors, LEDs, and Buzzers

PowerPAD is a trademark of Texas Instruments.

DESCRIPTION/ORDERING INFORMATION

The power supply provides regulated 5-V output to power the system microcontroller and drive eight low-side switches. The brown-out detection output (BO_OUTZ) warns the system if there is a temporary drop in the supply voltage, so the system can prevent potentially hazardous situations.

A serial communications interface controls the eight low-side outputs; each output has an internal snubber circuit to absorb the inductive load at turn OFF. Alternatively, the system can use a fly-back diode to VIN to help recirculate the energy in an inductive load at turn OFF.