Overview
The TPS65233-1RTER, produced by Texas Instruments, is a monolithic voltage regulator designed specifically for providing the 13-V/18-V power supply and the 22-kHz tone signaling to the Low Noise Block (LNB) down-converter in satellite receivers. This IC integrates a boost converter, a Linear Dropout (LDO) regulator, and a 22-kHz tone generator, making it a comprehensive solution for LNB power supply needs. It supports both analog and digital satellite receivers and is compatible with the DiSEqC 1.x standard. The device features an I2C interface for flexible control and programming of various functions, enhancing its usability in diverse applications.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range (VIN) | 4.5 | 20 | V | ||
| Shutdown Supply Current (IDDSDN) | EN = 0 | 160 | µA | ||
| LDO Input Quiescent Current (IDDQ) | VIN = 12 V, IOUT = 0 A, VBOOST = 14 V | 10.5 | mA | ||
| UVLO (Under Voltage Lockout) | Falling VIN | 3.6 | 3.8 | 4.1 | V |
| Output Voltage (VLNB) | VCTRL = 1, SCL = 0, IOUT = 500 mA | 18 | 18.6 | V | |
| Thermal Shutdown Trip Point | Rising Temperature | 160 | °C | ||
| I2C Interface Maximum SCL Clock Frequency | 400 | kHz |
Key Features
- Complete Integration Solution: Integrates a boost converter, LDO regulator, and a 22-kHz tone generator for LNB power supply.
- I2C Interface: Supports standard and fast I2C modes (100 kbps and 400 kbps) for flexible control and programming.
- DiSEqC 1.x Compatibility: Compliant with the DiSEqC 1.x standard for satellite receivers.
- Adjustable Output Current Limit: Output current can be precisely programmed by an external resistor or through I2C.
- Boost Converter: Features a low Rdson internal power MOSFET and operates at a fixed 1-MHz switching frequency).
- Low Noise and Low Drop Output: Includes a push-pull output stage to generate clean output voltage).
- Thermal and Overcurrent Protection: Includes thermal shutdown and overcurrent protection with hiccup mode for reliability).
- Flexible 22-kHz Tone Generation: Five different methods to generate the 22-kHz tone signal with or without I2C).
Applications
The TPS65233-1RTER is primarily designed for use in analog and digital satellite receivers. It is suitable for applications involving LNB down-converters in antenna dishes or multi-switch boxes. The device's features make it an ideal choice for any system requiring a reliable and programmable power supply solution for LNBs).
Q & A
- What is the primary function of the TPS65233-1RTER?
The TPS65233-1RTER is a monolithic voltage regulator designed to provide the 13-V/18-V power supply and the 22-kHz tone signaling to the LNB down-converter in satellite receivers).
- What communication interface does the TPS65233-1RTER support?
The device supports I2C interface in both standard and fast modes (100 kbps and 400 kbps)).
- How can the output current limit be adjusted?
The output current limit can be adjusted by an external resistor connected to the ISEL pin or through I2C programming).
- What is the switching frequency of the boost converter?
The boost converter operates at a fixed 1-MHz switching frequency).
- Does the TPS65233-1RTER have thermal protection?
Yes, the device includes thermal shutdown with a trip point at 160°C and a hysteresis of 20°C).
- How is the 22-kHz tone signal generated?
The 22-kHz tone signal can be generated in five different ways, with or without using the I2C interface).
- What is the maximum SCL clock frequency for the I2C interface?
The maximum SCL clock frequency for the I2C interface is 400 kHz).
- Is the TPS65233-1RTER compatible with DiSEqC 1.x standard?
Yes, the device is compatible with the DiSEqC 1.x standard for satellite receivers).
- How does the device protect against overcurrent conditions?
The device has overcurrent protection with hiccup mode; if the overcurrent condition lasts more than 4 ms, the converter enters hiccup mode and retries startup in 128 ms).
- What type of output stage does the TPS65233-1RTER use?
The device uses a push-pull output stage to generate clean output voltage).
