LNBH21 LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER ANC I²C INTERFACE
Intended for analog and digital satellite STB receivers/SatTV, sets/PC cards, the LNBH21 is a monolithic voltage regulator and interface IC, assembled in POWER SO-20, specifically designed to provide the 13/18V power supply and the 22KHz tone signalling to the LNB downconverter in the antenna or to the multiswitch box. In this application field, it offers a complete solution with extremely low component count, low power dissipation together with simple design and I²CTM standard interfacing
技术特性
- COMPLETE INTERFACE BETWEEN LNB AND I²CTM BUS
- BUILT-IN DC/DC CONTROLLER FOR SINGLE 12V SUPPLY OPERATION AND HIGH EFFICIENCY (Typ. 94% @ 750mA)
- TWO SELECTABLE OUTPUT CURRENT LIMIT (450mA / 750mA)
- BOTH COMPLIANT WITH EUTELSAT AND DIRECT OUTPUT VOLTAGE SPECIFICATION
- ACCURATE BUILT-IN 22KHz TONE OSCILLATOR SUITS WIDELY ACCEPTED STANDARDS
- FAST OSCILLATOR START-UP FACILITATES DiSEqCTM ENCODING
- BUILT-IN 22KHz TONE DETECTOR SUPPORTS BI-DIRECTIONAL DiSEqCTM2.0
- SEMI-LOWDROP POST REGULATOR AND HIGH EFFICIENCY STEP-UP PWM FOR LOW POWER LOSS: Typ. 0.56W @ 125mA
- TWO OUTPUT PINS SUITABLE TO BYPASS THE OUTPUT R-L FILTER AND AVOID ANY TONE DISTORSION (R-L FILTER AS PER DiSEqC 2.0 SPECs, see application circuit on pag. 5)
- CABLE LENGTH DIGITAL COMPENSATION
- OVERLOAD AND OVER-TEMPERATURE INTERNAL PROTECTIONS
- OVERLOAD AND OVER-TEMPERATURE I²C DIAGNOSTIC BITs
- LNB SHORT CIRCUIT SOA PROTECTION WITH I²C DIAGNOSTIC BIT
- +/-4KV ESD TOLERANT ON INPUT/ OUTPUT POWER PINS
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功能框图
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LNBH21 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 |
| LNBH21PD-TR |
Active |
|
1000 |
PowerSO-20 |
Tape And Reel |
|
LNBH21PD-TR |
DATASHEET
| 描述 |
版本 |
大小 |
| LNBH21 : DS3554: LNB supply and control IC with step-up converter and I²C interface |
4 |
497KB |
