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LNBH26 Datasheet(PDF) 2 Page - STMicroelectronics |
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LNBH26 Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 38 page ![]() Contents LNBH26 2/38 Doc ID 022771 Rev 1 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Application information (valid for each section A/B) . . . . . . . . . . . . . . . 4 2.1 DISEQC™ data encoding (DSQIN pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Data encoding by external 22 kHz tone TTL signal . . . . . . . . . . . . . . . . . . 4 2.3 Data encoding by external DiSEqC envelope control through the DSQIN pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 LPM (low power mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.5 DISEQC™ 2.0 implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.6 Output current limit selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.7 Output voltage selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.8 Diagnostic and protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.9 Surge protections and TVS diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.10 FLT: Fault FLAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.11 VMON: output voltage diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.12 TMON: 22 kHz tone diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.13 TDET: 22 kHz tone detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.14 IMON: minimum output current diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.15 PDO: overcurrent detection on output pull-down stage . . . . . . . . . . . . . . . 8 2.16 Power-on I²C interface reset and undervoltage lockout . . . . . . . . . . . . . . . 8 2.17 PNG: input voltage minimum detection . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.18 ISW: inductor switching current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.19 COMP: boost capacitor ESR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.20 OLF: overcurrent and short-circuit protection and diagnostic . . . . . . . . . . . 9 2.21 OTF: thermal protection and diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5 Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 I²C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 |
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