TPL9201 Series
24-V, 8-ch NMOS low-side driver with 5-V LDO and zero-Volt detect
Manufacturer: Texas Instruments
Catalog
24-V, 8-ch NMOS low-side driver with 5-V LDO and zero-Volt detect
Key Features
• Eight Low-Side Drivers With Internal Clamp for Inductive Loads and Current Limiting for Self ProtectionSeven Outputs Rated at 150 mA and Controlled Through Serial InterfaceOne Output Rated at 150 mA and Controlled Through Serial Interface and Dedicated Enable Pin5-V ±5% Regulated Power Supply With 200-mA Load Capability at VINMax of 18 VInternal Voltage Supervisory for Regulated OutputSerial Communications for Control of Eight Low-Side DriversEnable/Disable Input for OUT15-V or 3.3-V I/O Tolerant for Interface to MicrocontrollerProgrammable Power-On Reset Delay BeforeRSTAsserted High, Once 5 V Is Within Specified Range (6 ms Typ)Programmable Deglitch Timer BeforeRSTIs Asserted Low (40 µs Typ)Zero-Voltage Detection SignalThermal Shutdown for Self ProtectionAPPLICATIONSElectrical AppliancesAir Conditioning UnitsRangesDishwashersRefrigeratorsMicrowavesWashing MachinesGeneral-Purpose Interface Circuits, Allowing Microcontroller Interface to Relays, Electric Motors, LEDs, and BuzzersPowerPAD is a trademark of Texas Instruments.Eight Low-Side Drivers With Internal Clamp for Inductive Loads and Current Limiting for Self ProtectionSeven Outputs Rated at 150 mA and Controlled Through Serial InterfaceOne Output Rated at 150 mA and Controlled Through Serial Interface and Dedicated Enable Pin5-V ±5% Regulated Power Supply With 200-mA Load Capability at VINMax of 18 VInternal Voltage Supervisory for Regulated OutputSerial Communications for Control of Eight Low-Side DriversEnable/Disable Input for OUT15-V or 3.3-V I/O Tolerant for Interface to MicrocontrollerProgrammable Power-On Reset Delay BeforeRSTAsserted High, Once 5 V Is Within Specified Range (6 ms Typ)Programmable Deglitch Timer BeforeRSTIs Asserted Low (40 µs Typ)Zero-Voltage Detection SignalThermal Shutdown for Self ProtectionAPPLICATIONSElectrical AppliancesAir Conditioning UnitsRangesDishwashersRefrigeratorsMicrowavesWashing MachinesGeneral-Purpose Interface Circuits, Allowing Microcontroller Interface to Relays, Electric Motors, LEDs, and BuzzersPowerPAD is a trademark of Texas Instruments.
Description
AI
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 VINto help recirculate the energy in an inductive load at turn OFF.
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 VINto help recirculate the energy in an inductive load at turn OFF.
