TPS65235是TI公司的一款转换器（集成开关）产品，TPS65235是具有 I2C 接口的 LNB 稳压器，本页介绍了TPS65235的产品说明、应用、特性等，并给出了与TPS65235相关的TI元器件型号供参考。
TPS65235 - 具有 I2C 接口的 LNB 稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
- Complete Integrate Solution for LNB and I2C Interface
- DiSEqC 2.x, and DiSEqC 1.x Compatible
- Supports 5 V, 12 V and 15 V Power Rail
- Up to 1000 mA Accurate Output Current Limit Adjustable by External Resistor
- Boost Switch Peak Current Limit Proportional to LDO Current Limit
- Boost Converter with 140 mΩ Low Rds(on) Internal Power Switch
- Boost Switching Frequency 1 MHz or 500 kHz Selectable
- Dedicated Enable Pin for Non-I2C Application
- Low Drop Output LDO With Push-pull Output Stage for VLNB Output
- Built-in Accurate 22-kHz Tone Generator and External Tone Input Support
- Supports Both External 44-kHz and 22-kHz Tone Input
- Adjustable Soft-start and 13-V to 18-V Voltage Transition Time
- 650 mV to 750 mV 22-kHz Tone Amplitude Selection
- I2C Registers Accessible with EN Low
- Short Circuit Dynamic Protection
- Diagnostics for Output Voltage Level, DiSEqC Tone Input and Output, Current Level, and Cable Connection
- Thermal Protection Available
- 20-Lead WQFN 3 mm x 3 mm (RUK) Package
- Set Top Box Satellite Receiver
- TV Satellite Receiver
- PC card Satellite Receiver
- Satellite TV
Designed for analog and digital satellite receivers, the TPS65235 is a monolithic voltage regulator with I2C interface; specifically to provide the 13-V to 18-V power supply and the 22-kHz tone signal to the LNB down converter in the antenna dish or to the multi-switch box. It offers a complete solution with minimum component count, low power dissipation together with simple design and I2C standard interface.
TPS65235 features high power efficiency. The boost converter integrates a 140-mΩ power MOSFET running at 1 MHz or 500 kHz selectable switching frequency. Drop out voltage at the linear regulator is 0.8 V to minimize power loss. TPS65235 provides multiple ways to generate the 22 kHz signal. Integrated linear regulator with push-pull output stage generates 22-kHz tone signal superimposed at the output even at zero loading. Current limit of linear regulator can be programmed by external resistor with ±10% accuracy. Full range of diagnostic read by I2C is available for system monitoring.
TPS65235 supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and output interface.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS65235 | WQFN | 3.00 mm x 3.00 mm |
