Overview
The TPS65233RTET, produced by Texas Instruments, is a monolithic voltage regulator designed specifically for analog and digital satellite receivers. This integrated circuit provides the necessary 13-V/18-V power supply and 22-kHz tone signaling to the Low Noise Block (LNB) down-converter in the antenna dish or to the multi-switch box. It offers a complete integration solution with a very low component count, low power dissipation, and simple design using I2C standard interfacing.
The TPS65233RTET features high power efficiency, integrating a 120-mΩ power MOSFET running at a 500-kHz switching frequency. The drop-out voltage at the linear regulator is 0.8 V to minimize power loss. The device supports multiple ways to generate the 22-kHz signal and includes an integrated linear regulator with a push-pull output stage to generate a clean 22-kHz tone signal even at zero loading.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 16-Pin WQFN (RTE) | - |
| Operating Temperature Range | -40 to 85 | °C |
| Input Operating Voltage | 4.5 to 20 | V |
| Output Current Limit | Up to 1000 mA | - |
| Switching Frequency | 500 kHz | - |
| Drop-out Voltage | 0.8 V | - |
| Tone Frequency | 22 kHz | - |
| Junction Temperature Range | -40 to 125 | °C |
Key Features
- Complete Integration Solution for LNB and I2C
- DiSEqC 1.x Compatible
- Supports 5-V and 12-V Power Bus
- Up to 1000-mA Accurate Output Current Limit Adjustable by External Resistor and I2C
- Boost Converter With Low Rdson Internal Power Switch
- Dedicated Enable Pin for Non-I2C Application
- Low Noise, Low Drop Output With Push-Pull Output Stage
- Built-In Accurate 22-kHz Tone Generator or External Pin
- Adjustable Soft-Start and 13-V/18-V Voltage Transition Time
- LNB Short Circuit Dynamic Protection
- Diagnostics for Output Voltage Level, Input Supply UVLO, and DiSEqC Tone Output
- Cable Disconnect Diagnostic
Applications
- Set Top Box Satellite Receiver
- TV Satellite Receiver
- PC Card Satellite Receiver
Q & A
- What is the primary function of the TPS65233RTET?
The TPS65233RTET is 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 is the package type and pin count of the TPS65233RTET?
The TPS65233RTET is available in a 16-Pin WQFN (RTE) package.
- What is the operating temperature range of the TPS65233RTET?
The operating temperature range is -40°C to 85°C.
- What is the maximum output current limit of the TPS65233RTET?
The maximum output current limit is up to 1000 mA, adjustable by external resistor and I2C.
- What is the switching frequency of the boost converter in the TPS65233RTET?
The switching frequency is 500 kHz.
- Does the TPS65233RTET support DiSEqC protocol?
Yes, it is DiSEqC 1.x compatible.
- What kind of protection does the TPS65233RTET offer?
The device offers LNB short circuit dynamic protection, diagnostics for output voltage level, input supply UVLO, and DiSEqC tone output, as well as cable disconnect diagnostic.
- How can the 22-kHz tone signal be generated with the TPS65233RTET?
The 22-kHz tone signal can be generated internally by the device or through an external pin.
- What is the typical application of the TPS65233RTET?
Typical applications include set top box satellite receivers, TV satellite receivers, and PC card satellite receivers.
- How is the output current limit programmed in the TPS65233RTET?
The output current limit can be programmed by an external resistor with ±10% accuracy using I2C.
