LNBH24 Dual LNB supply and control IC with step-up and I²C interface
Intended for analog and digital dual satellite receivers/sat-TV, sat-PC cards, the LNBH24 is a monolithic voltage regulator and interface IC, assembled in PowerSSO-36 ePad, specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling for two independent LNB down-converters in the antenna dishes and/or multi-switch box. In this application field, it offers a dual tuner STBs with extremely low component count, low power dissipation together with simple design and I²C standard interfacing
技术特性
- Complete interface between LNBS 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 through external resistor
- Compliant with main satellite receivers output voltage specification
- New accurate built-in 22 kHz tone generator meets widely accepted standards (patent pending)
- Fast oscillator start-up facilitates DiSEqC™ encoding
- Built-in 22 kHz tone detector supports bidirectional DiSEqC™ 2.0
- Very low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS allow low power losses
- Two output pins suitable for bypassing the output R-L filter and avoiding tone distortion (RL 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
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功能框图
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LNBH24 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| LNBH24PPR |
Active |
1.709 |
1000 |
PowerSSO 36 |
Tape And Reel |
|
LNBH24PPR |
| LNBH24TPPR |
Active |
1.709 |
1000 |
PowerSSO 36 |
Tape And Reel |
|
LNBH24TPPR |
DATASHEET
| 描述 |
版本 |
大小 |
| LNBH24 : DS5705: Dual LNB supply and control IC with step-up and I²C interface |
3 |
422KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN3167: LNBH24: dual supply and control IC with step-up and I²C interface |
1 |
4939KB |
BOARDS AND TOOLS
| 型号 |
描述 |
| STEVAL-CBL004V1 |
Power supply demonstration board for LNB based on the LNBH24 |
