Overview
The LNBH23PPR, produced by STMicroelectronics, is a monolithic voltage regulator and interface IC designed specifically for analog and digital satellite receivers. It is assembled in a PowerSSO-24 package and is intended to provide the necessary 13/18 V power supply and 22 kHz tone signalling to the Low Noise Block (LNB) down-converter in the antenna dish or to the multi-switch box. This IC offers a complete solution with a low component count, low power dissipation, and simple design, along with I²C standard interfacing.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | PowerSSO-24 |
| Input Voltage | Single 12 V supply operation |
| Output Voltage | 13/18 V |
| Efficiency | Typ. 93% @ 0.5 A |
| Output Current Limit | Selectable by external resistor |
| 22 kHz Tone Generator | Accurate built-in generator |
| ESD Tolerance | ± 4 kV on output power pins |
| Protection Features | Overload, over-temperature, and LNB short circuit dynamic protection |
Key Features
- Complete interface between LNB and I²C bus
- Built-in DC-DC converter for high efficiency
- Selectable output current limit by external resistor
- Compliant with main satellite receivers output voltage specification
- Auxiliary modulation input (EXTM pin) for DiSEqC™ 1.X encoding
- Accurate built-in 22 kHz tone generator
- Low-drop post regulator and high efficiency step-up PWM with integrated power NMOS
- Overload and over-temperature internal protections with I²C diagnostic bits
- LNB short circuit dynamic protection
- ± 4 kV ESD tolerant on output power pins
Applications
The LNBH23PPR is primarily used in analog and digital satellite receivers, including satellite TV (SatTV) and set-top box (STB) applications. It is also suitable for use in multi-switch boxes and other satellite communication systems where a reliable and efficient power supply and control interface are required.
Q & A
- What is the primary function of the LNBH23PPR? The LNBH23PPR is a monolithic voltage regulator and interface IC designed to provide the necessary power supply and control signals for satellite receivers.
- What package type is the LNBH23PPR available in? The LNBH23PPR is available in a PowerSSO-24 package.
- What is the typical efficiency of the LNBH23PPR? The typical efficiency is 93% at 0.5 A.
- How is the output current limit set? The output current limit is selectable by an external resistor.
- Does the LNBH23PPR have built-in protection features? Yes, it includes overload, over-temperature, and LNB short circuit dynamic protection.
- What is the ESD tolerance of the LNBH23PPR? The LNBH23PPR is ± 4 kV ESD tolerant on output power pins.
- What communication interface does the LNBH23PPR use? The LNBH23PPR uses an I²C interface.
- Is the LNBH23PPR compliant with main satellite receivers' output voltage specifications? Yes, it is compliant with main satellite receivers' output voltage specifications.
- Can the LNBH23PPR support DiSEqC™ 1.X encoding? Yes, it supports DiSEqC™ 1.X encoding through the auxiliary modulation input (EXTM pin).
- What is the purpose of the built-in 22 kHz tone generator? The built-in 22 kHz tone generator is used for signalling to the LNB down-converter.
