TPL9201

` 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 Is Asserted Low (40 ms Typ)
` Zero-Voltage Detection Signal With Built-In Filter of 20 ms
` Thermal Shutdown for Self Protection

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under  recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device  eliability.
(2) All voltage values are with respect to GND.
(3) Absolute negative voltage on these pins must not go below 0.5 V.
(4) Not more than one output should be shorted at a time, and duration of the short circuit should not exceed 1 ms.
(5) The thermal data is based on using 1-oz copper trace with JEDEC 51-5 test board for PWP and JEDEC 51-7 test  oard for N.
(6) The data is based on ambient temperature of 25°C max.
(7) The Human-Body Model is a 100-pF capacitor discharged through a 1.5-kW resistor into each pin.

The power supply provides regulated 5-V output to power the TPL9201 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 TPL9201 system can use a fly-back diode to VIN to help recirculate the energy in an inductive load at turn OFF.