53
Recommended Operating Conditions
12.
LNB SUPPLY AND CONTROL IC
LNBH29
General Description
LNBH29 IC is intended for analog and digital Satellite receivers/Sat-TV, Sat-PC
cards, the LNBH29 series is a monolithic voltage regulator and interface IC, assembled in QFN3x3-16L and
QFN4x4-16L, specifically designed to provide the 13/18V power supply and the 22KHz tone signaling 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 12V SUPPLY OPERATION AND HIGH
EFFICIENCY (TYP. 93% @ 0.5A)
SELECTABLE OUTPUT CURRENT LIMIT BY EXTERNAL RESISTOR
COMPLIANT WITH MAIN SATELLITE RECEIVERS OUTPUT VOLTAGE
SPECIFICATION
ACCURATE BUILT-IN 22 kHz TONE GENERATOR SUITS WIDELY ACCEPTED
STANDARDS
22 KHz TONE WAVEFORM INTEGRITY GUARANTED ALSO AT NO LOAD
CONDITION
LOW-DROP POST REGULATOR AND HIGH EFFICIENCY STEP-UP PWM WITH
INTEGRATED POWER N-MOS ALLOW LOW POWER LOSSES.
OVERLOAD AND OVER-TEMPERATURE INTERNAL PROTECTIONS WITH I2C
DIAGNOSTIC BITS
LNB SHORT CIRCUIT DYNAMIC PROTECTION
+/- 4KV E.S.D. TOLERANT ON OUTPUT POWER PINS
Applications
LNB Power Supply and Control for Satellite Set Top Boxes
a)
Package Reference
Summary of Contents for 55293DLB
Page 1: ...HITACHI 55HK6T64U 55293DLB MB100 SERVICE MANUAL ...
Page 5: ...4 Table Pin Functions ...
Page 6: ...5 B M88TS2022 SATELLITE TUNER Pin Assigment ...
Page 9: ...8 Pin descriptions and functions Figure TAS5719 Pin descriptions ...
Page 10: ...9 Table TAS5719 Pin Functions ...
Page 15: ...14 Table Electrical Characteristics Figure PHP Package Top View ...
Page 16: ...15 Table Pin Functions ...
Page 23: ...22 Figure Pin Description Table Pin functions ...
Page 25: ...24 Table Recommended operating conditions Figure Pin Description ...
Page 31: ...30 5 MICROCONTROLLER MSTAR MSD95C0H General Description ...
Page 32: ...31 Features ...
Page 33: ...32 ...
Page 34: ...33 ...
Page 35: ...34 ...
Page 36: ...35 ...
Page 37: ...36 Table Recommended operating conditions ...
Page 38: ...37 6 VIDEO BACK END PROCESSOR MSTAR MST7410DY General Description ...
Page 39: ...38 Table Recommended operating conditions Features ...
Page 40: ...39 ...
Page 41: ...40 Block Diagram Figure Block diagram ...
Page 50: ...49 Table Pin description 11 DEMODULATOR STAGE MSB1240 DVB T2 Key Features ...
Page 51: ...50 General Description ...
Page 52: ...51 Block Diagram ...
Page 53: ...52 Pinning Absolute Maximum Ratings ...
Page 63: ...62 ...
Page 65: ...64 15 PLACEMENT OF BLOCKS ...