TPL9201NE4

具有集成的5V LDO和零电压检测8路继电器驱动器 8-CHANNEL RELAY DRIVER WITH INTEGRATED 5-V LDO AND ZERO-VOLT DETECTION

DESCRIPON/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.

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 µs 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