LNBP21PD

Product Summary

The LNBP21PD is a monolithic voltage regulator and interface IC, assembled in SO-20 and PowerSO-20, specifically designed to provide the power and the 13/18V, 22KHz tone signalling to the LNB downconverter in the antenna or to the multiswitch box. In this application field, the LNBP21PD offers a complete solution with extremely low component count, low power dissipation together with simple design and I2CTM standard interfac-ing. The LNBP21PD has a built in DC/DC step-up controller that, from a single supply source ranging from 8 to 15V, generates the voltages that let the linear post-regulator to work at a minimum dissipated power. An UnderVoltage Lockout circuit will disable the whole circuit when the supplied VCC drops below a fixed threshold (6.7V typically).

Parametrics

LNBP21PD absolute maximum ratings: (1)DC Input Voltage, VCC: 16 V; (2)DC Input Voltage, VUP: 25 V; (3)DC Input Voltage, VLT1, VLT2: 20 V; (4)Output Current, IO: Internally Limited mA; (5)DC Output Pin Voltage, VO: -0.3 to 22 V; (6)Logic Input Voltage (SDA, SCL, DSQIN), VI: -0.3 to 7 V; (7)Detector Input Signal Amplitude, VDETIN: 2 VPP; (8)Logic High Output Voltage (DSQOUT), VOH: 7 V; (9)Bypass Switch ON Current, ILT: 900 mA; (10)Bypass Switch OFF Voltage, VLT: ±20 V; (11)Gate Current, IGATE: ±400 mA; (12)Current Sense Voltage, VSENSE: -0.3 to 1 V; (13)Address Pin Voltage, VADDRESS: -0.3 to 7 V; (14)Storage Temperature Range, Tstg: -40 to +150℃; (15)Operating Junction Temperature Range, Top: -40 to +125℃.

Features

LNBP21PD features: (1)Complete interface between LNB and I2C bus; (2)Built-in dc/dc controller for single 12v supply operation; (3)Accurate built-in 22khz tone oscillator; (4)Suits widely accepted standards; (5)Fast oscillator start-up facilitates diseqctm encoding; (6)Built-in 22khz tone detector supports bi-directional DiSEqCTM; (7)Loop-through function for slave operation; (8)LNB short circuit protection and diagnostic; (9)Cable length digital compensation; (10)Internal over temperature protection; (11)ESD rating 4kv on power input-output pins.

Diagrams