LNBH23L is an LNB supply and control IC with step-up and I²C interface. It features a built-in DC-DC converter for single 12V supply operation and high efficiency (typical 93% @ 0.5A). The output current limit can be selected by an external resistor. It is compliant with main satellite receivers output voltage specification. The auxiliary modulation input facilitates DiSEqC™ 1.X encoding. It has an accurate built-in 22kHz tone generator that suits widely accepted standards. It also has a low-drop post regulator and high efficiency step-up PWM with integrated power NMOS to allow low power losses. It has overload and over-temperature internal protections with I²C diagnostic bits. It also has LNB short circuit dynamic protection. The output power pins are ±4kV ESD tolerant.
The LNBH23L is a monolithic voltage regulator and interface IC designed for analog and digital satellite receivers. It provides a complete solution for powering LNB down-converters and multi-switch boxes by generating 13V or 18V power supplies and 22kHz tone signaling. The device integrates a DC-DC step-up converter for efficient single 12V supply operation and includes an I2C interface for full control and diagnostics.
| Supply Voltage Range | 8 V to 15 V |
|---|---|
| Output Voltage Options | 13 V or 18 V |
| Efficiency | typ. 93% @ 0.5 A |
| Package Type | QFN32 (5 x 5 mm) |
| Over-temperature Shutdown Threshold | 150 °C |
| Over-temperature Reset Threshold | 135 °C |
| ESD Tolerance | +4kV |
The typical efficiency is 93% at a 0.5A load.
Yes, the output can be logic controlled to be 13 or 18 V by means of the VSEL bit.
The device shuts off when the junction temperature exceeds 150 °C.