FEATURES
· Eight Low-Side Drivers With Internal Clamp for
Inductive Loads and Current Limiting for Self
Protection
– Seven Outputs 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
Specified Range (6 ms Typ)
· Programmable Deglitch Timer Before RST
Asserted Low (40 ms Typ)
· Zero-Voltage Detection Signal
· Thermal Shutdown for Self Protection

APPLICATIONS
· Electrical Appliances
– Air Conditioning Units
– Ranges
– Dishwashers
– Refrigerators
– Microwaves
– Washing Machines
· General-Purpose Interface Circuits, Allowing
Microcontroller Interface to Relays, Electric
Motors, LEDs, and Buzzers

DESCRIPTION/ORDERING INFORMATION
The power supply provides regulated 5-V output to power the system microcontroller and drive eight low-side
switches. The ac zero-detect circuitry is monitoring the crossover voltage of the mains ac supply. The resultant
signal is a low-frequency clock output on the ZVS terminal, based on the ac-line cycle. This information allows
the microcontroller to reduce in-rush current by powering loads on the ac-line peak voltage.
A serial communications interface controls the eight low-side outputs; each output has an internal snubber circuit
to absorb the energy in the inductor 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.