LNBH25S：LNB supply and control IC with step-up and I²C interface
Intended for analog and digital satellite receivers/Sat-TV and Sat-PC cards, the LNBH25S is a monolithic voltage regulator and interface IC, assembled in QFN24L (4x4 mm) specifically designed to provide 13/18 V power supply and 22 kHz tone signaling to the LNB down-converter in the antenna dish or to the multi-switch box. In this application field, it offers a complete solution with extremely low component count and low power dissipation together with a simple design and I²C standard interface.
Key Features
- Complete interface between LNB and I²C bus
- Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% @ 0.5 A)
- Selectable output current limit by external resistor
- Compliant with main satellite receiver output voltage specifications (15 programmable levels)
- Accurate built-in 22 kHz tone generator suits widely accepted standards
- 22 kHz tone waveform integrity guaranteed at no-load condition
- Low drop post regulator and high efficiency step-up PWM with integrated power NMOS allowing low power losses
- LPM function (low power mode) to reduce dissipation
- Overload and overtemperature internal protections with I²C diagnostic bits
- LNB short-circuit dynamic protection
- +/- 4 kV ESD tolerant on output power pins
Product Specifications
Brochures
Solution Evaluation Tools
| Part Number | Manufacturer | Description |
|---|
| STEVAL-LNBH02 | ST | Power supply evaluation board for LNB based on the LNBH25S |
| STEVAL-LNBH03 | ST | Power supply evaluation board for LNB based on the LNBH25S |
Sample & Buy
| Part Number | Package | Packing Type | Unit Price (US$)
* | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|
| LNBH25SPQR | QFN-24L | Tape And Reel | 0.863 | 1000 | NEC | EAR99 | MALAYSIA |
Quality & Reliability
