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 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
- Electrical Appliances
PowerPAD is a trademark of Texas Instruments.
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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | 8-Channel Relay Driver With Integrated 5-V LDO and Zero-Volt Detection 数据表 (Rev. D) | 2008-2-13 |