TPS65235-1
- Complete integrated solution for LNB and I 2C 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 R ds(on) internal power switch
- Boost switching frequency 1-MHz or 500-kHz selectable
- Audible noise avoided at force PWM mode
- Dedicated enable pin for non-I 2C application
- Low-dropout (LDO) regulator 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
- I 2C 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-pin WQFN 3-mm × 3-mm (RUK) package
Designed for analog and digital satellite receivers, the TPS65235-1 is a monolithic voltage regulator with I 2C 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. The device offers a complete solution with minimum component count, low power dissipation together with simple design and I 2C standard interface.
The TPS65235-1 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. The TPS65235-1 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 I 2C is available for system monitoring.
The TPS65235-1 has a special design at FCCM mode to avoid the audible noise especially when VIN is higher or closer to the VLNB output.
The TPS65235-1 supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and output interface.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS65235-1 LNB Voltage Regulator With I2C Interface datasheet (Rev. F) | PDF | HTML | 2023/5/2 | ||
| 應用說明 | DiSEqC™ 2.x Filter Optimization | PDF | HTML | 2021/5/11 | |||
| 技術文章 | Lowering audible noise in automotive applications with TI’s DRSS technology | PDF | HTML | 2021/3/18 | |||
| 應用說明 | Introduction to Anti-Audible Noise Function in TPS65235-1 | 2017/11/13 | ||||
| 使用指南 | Evaluation Module for the TPS65235-1 LNB Voltage Regulator With I2C Interface | 2016/11/1 |
設計與開發
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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
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。