TPS65235 - 具有 I2C 接口的 LNB 稳压器

TPS65235是TI德州仪器公司的一款转换器（集成开关）产品，TPS65235是具有 I2C 接口的 LNB 稳压器，本站介绍了TPS65235的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品特性

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

产品应用

Set Top Box Satellite Receiver
TV Satellite Receiver
PC card Satellite Receiver
Satellite TV

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS65235	WQFN	3.00 mm x 3.00 mm

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