TPS65235
- Complete integrated 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 × 3-mm (RUK) package
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.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | TPS65235 LNB Voltage Regulator With I2C Interface datasheet (Rev. D) | PDF | HTML | 2021年 5月 26日 |
| Application note | DiSEqC™ 2.x Filter Optimization | PDF | HTML | 2021年 5月 11日 | |
| Application note | LNB design considerations on TPS65233, TPS65235 | 2017年 9月 25日 | ||
| Application note | DiSEqC™ Protocol and LNB Voltage Regulator TPS65235 for Satellite STB/TV | 2016年 12月 14日 | ||
| User guide | Evaluation Module for the TPS65235 LNB Voltage Regulator With I2C Interface | 2015年 11月 26日 |
設計與開發
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TPS65235EVM-694 — 適用於 DisEqC2.x,具有 I2C 介面的 TPS65235 LNB 電壓穩壓器評估模組
TPS65235EVM-747 — 適用於 DisEqC1.x,具有 I2C 介面的 TPS65235 LNB 電壓穩壓器評估模組
TPS65235EVM-PWR747 評估模組 (EVM) 是完全組裝且經過測試的電路,用於評估適用於 DisEqC1.x 應用的 TPS65235。此 EVM 包含輸入和輸出連接器以及控制跨接器,可輕鬆評估裝置功能。TPS65235 是一款具有 I2C 介面的單體電壓穩壓器,專門用於向碟形天線中的 LNB 降轉換器或多開關盒提供 13V/18V 電源和 22kHz 音調訊號。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RUK) | 20 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。