LNBH23：LNBs supply and control IC with step-up and I2C interface
Intended for analog and digital satellite receivers/sat-TV, sat-PC cards, the LNBH23 is a monolithic voltage regulator and interface IC, assembled in PowerSSO-24 ePAD and QFN32 (5 x 5 mm.) ePAD, specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling 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, low power dissipation together with simple design and I²C standard interfacing.
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% @ 0.75 A), with integrated NMOS
- Selectable output current limit by external resistor
- Compliant with main satellite receiver systems specifications
- New accurate built-in 22 kHz tone generator suits widely accepted standards (patent pending)
- Fast oscillator start-up facilitates DiSEqC™ encoding
- Built-in 22 kHz tone detector supports bi-directional DiSEqC™ 2.0
- Very low-drop post regulator and high efficiency step-up PWM with integrated power NMOS allow low power losses
- Two output pins suitable to by-pass the output R-L filter and avoid any tone distortion (R-L filter as per DiSEqC™ 2.0 specs, see typ. application circuits)
- Overload and over-temperature internal protections with I²C diagnostic bits
- Output voltage and output current level diagnostic feedback by I²C bits
- LNB short circuit dynamic protection
- ± 4 kV ESD tolerant on output power pins
Product Specifications
Application Notes
Brochures
Solution Evaluation Tools
| Part Number | Manufacturer | Description |
|---|
| STEVAL-CBL005V1 | | LNB power supply demonstration board based on the LNBH23 |
Sample & Buy
| Part Number | Package | Packing Type | Unit Price (US$)
* | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|
| LNBH23QTR | VFQFPN 32 5x5x1.0 | Tape And Reel | 1.438 | 1000 | NEC | EAR99 | MALAYSIA |
Quality & Reliability
