LNBP14SP-T STMICROELECTRONICS [STMicroelectronics], LNBP14SP-T Datasheet

LNBP14SP-T

Manufacturer Part Number

LNBP14SP-T

Description

LNB SUPPLY AND CONTROL VOLTAGE REGULATOR PARALLEL INTERFACE

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

1.LNBP14SP-T.pdf (18 pages)

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DESCRIPTION

Intended for analog and digital satellite receivers,

the LNBP is a monolithic linear voltage regulator,

assembled in Multiwatt-15, PowerSO-20 and

PowerSO-10, specifically designed to provide the

powering voltages and the interfacing signals to

the LNB downconverter situated in the antenna

via the coaxial cable. Since most satellite

receivers have two antenna ports, the output

voltage of the regulator is available at one of two

logic-selectable output pins (LNBA, LNBB). When

the IC is powered and put in Stand-by (EN pin

LOW), both regulator outputs are disabled to

allow

supplied/controlled by others satellite receivers

sharing the same coaxial lines. In this occurrence

the device will limit at 3 mA (max) the backward

current that could flow from LNBA and LNBB

output pins to GND.

For slave operation in single dish, dual receiver

systems, the bypass function is implemented by

an electronic switch between the Master Input pin

(MI) and the LNBA pin, thus leaving all LNB

powering and control functions to the Master

Receiver. This electronic switch is closed when

the device is powered and EN pin is LOW.

September 1998

COMPLETE INTERFACE FOR TWO LNBs

REMOTE SUPPLY AND CONTROL

LNB SELECTION AND STAND-BY FUNCTION

BUILT-IN TONE OSCILLATOR FACTORY

TRIMMED AT 22KHz

FAST OSCILLATOR START-UP

FACILITATES DiSEqC

TWO SUPPLY INPUTS FOR LOWEST

DISSIPATION

BYPASS FUNCTION FOR SLAVE

OPERATION

LNB SHORT CIRCUIT PROTECTION AND

DIAGNOSTIC

AUXILIARY MODULATION INPUT EXTENDS

FLEXIBILITY

CABLE LENGTH COMPENSATION

INTERNAL OVER TEMPERATURE

PROTECTION

BACKWARD CURRENT PROTECTION

the

antenna

downconverters to

ENCODING

LNB SUPPLY AND CONTROL VOLTAGE

REGULATOR (PARALLEL INTERFACE)

The regulator outputs can be logic controlled to

be 13 or 18 V (typ.) by mean of the VSEL pin for

remote controlling of LNBs. Additionally, it is

possible to increment by 1V (typ.) the selected

voltage value to compensate the excess voltage

drop along the coaxial cable (LLC pin HIGH).

In order to reduce the power dissipation of the

device when the lowest output voltage is

selected, the regulator has two Supply Input pins

respectively at 16V (min) and 23V (min), and an

internal switch automatically will select the

suitable supply pin according to the selected

output voltage. If adequate heatsink is provided

and higher power losses are acceptable, both

supply pins can be powered by the same 23V

source without

performance.

The ENT (Tone Enable) pin activates the internal

oscillator so that the DC output is modulated by a

oscillator is factory trimmed within a tolerance of

external components are required.

A burst coding of the 22KHz tone can be

0.3 V, 22KHz (typ.) square wave. This internal

2KHz, thus no further adjustments neither

CC1

PowerSo-20

and V

LNBP10 SERIES

CC2

Multiwatt-15

. They must be

affecting any

PowerSO-10

LNBP20

other

powered

circuit

1/18

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LNBP14SP-T Summary of contents

Page 1

LNB SUPPLY AND CONTROL VOLTAGE REGULATOR (PARALLEL INTERFACE) COMPLETE INTERFACE FOR TWO LNBs REMOTE SUPPLY AND CONTROL LNB SELECTION AND STAND-BY FUNCTION BUILT-IN TONE OSCILLATOR FACTORY TRIMMED AT 22KHz FAST OSCILLATOR START-UP FACILITATES DiSEqC ENCODING TWO SUPPLY INPUTS FOR LOWEST ...

Page 2

... When a limited functionality in a smaller package matches design needs, a range of cost-effective PowerSO-10 solutions is also offered. All versions have built-in thermal protection against overheatingdamage. bus hardware requirements. DiSEqC PowerSO-20 LNBP10SP LNBP11SP LNBP12SP LNBP13SP LNBP14SP LNBP15SP LNBP16SP LNBP20PD PowerSO-20 PowerSO-10 and off +t on off ...

Page 3

TABLE A: PIN CONFIGURATIONS SYMBOL NAME V Supply Input 1 15V to 25V supply CC1 automatically selected when V V Supply Input 2 22V to 25V supply CC2 automatically selected when V LNBA Output Port See ...

Page 4

LNBP10 SERIES - LNBP20 ABSOLUTE MAXIMUM RATING Symbol V DC Input Voltage (VCC1, VCC2, MI Output Current (LNBA, LNBB Logic Input Voltage (ENT, EN, OSEL, VSEL, LLC Bypass Switch Current Power ...

Page 5

BLOCK DIAGRAM LNBP10 SERIES - LNBP20 5/18 ...

Page 6

LNBP10 SERIES - LNBP20 ELECTRICAL CHARACTERISTICS FOR LNBP SERIES (T EN=H, ENT=L, LLC 16V, V IN1 Symbol Parameter V V Supply Voltage IN1 CC1 V V Supply Voltage IN2 CC2 V Output Voltage O1 V Output Voltage ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified T Output Voltage vs Output Current Tone Duty Cycle vs Temperature Tone Fall Time vs Temperature LNBP10 SERIES - LNBP20 o = Tone Frequency vs Temperature Tone Rise Time vs Temperature Tone ...

Page 8

LNBP10 SERIES - LNBP20 TYPICAL PERFORMANCE CHARACTERISTICS (continued) S.V.R. vs Frequency External Modulation vs Temperature Bypass Switch Drop vs Output Current 8/18 LNBA External Modulation Gain vs Frequency Bypass Switch Drop vs Output Current Overload Flag pin Logic Low vs ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS (continued) Supply Current vs Temperature Dynamic Overload protection (I vs Time) SC Tone Disable LNBP10 SERIES - LNBP20 Supply Current vs Temperature Tone Enable 22 KHz Tone 9/18 ...

Page 10

LNBP10 SERIES - LNBP20 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Enable Time 18V to 13V Change 10/18 Disable Time 13V to 18V Change ...

Page 11

TYPICAL APPLICATION SCHEMATICS TWO ANTENNA PORTS RECEIVER MCU+V 10uF C2 11 AUX DATA EXTM R1 47K 13 OLF 4 VSEL 9 ENT OSEL 12 LLC LNBP20CR Vcc I/Os SINGLE ANTENNA RECEIVER WITH MASTER RECEIVER PORT MCU+V 10uF ...

Page 12

LNBP10 SERIES - LNBP20 TYPICAL APPLICATION SCHEMATICS (continued) USING SERIAL BUS TO SAVE MPU I/Os MCU AUX DATA 47K 10uF STR CLK ...

Page 13

TYPICAL APPLICATION SCHEMATICS (continued) CONNECTING TOGETHER V AND V CC1 VCC1 VCC2 LNBA LNBB 4 CEXT VSEL 7 ENT OSEL GND LNBP10SP MCU+V Vcc I/Os SINGLE ANTENNA RECEIVER WITH MASTER RECEIVER PORT: LOW COST SOLUTION C2 9 ...

Page 14

LNBP10 SERIES - LNBP20 TYPICAL APPLICATION SCHEMATICS (continued) SINGLE ANTENNA RECEIVER WITH OVERLOAD DIAGNOSTIC MCU AUX DATA EXTM OLF 47K 4 VSEL 7 ENT 5 EN LNBP15SP Vcc I/Os 14/18 17V 24V 1 VCC1 ...

Page 15

MULTIWATT-15 MECHANICAL DATA mm DIM. MIN. TYP 0.49 F 0.66 G 1.02 1.27 G1 17.53 17. 21.9 22.2 L1 21.7 22.1 L2 17.65 L3 17.25 17.5 L4 10.3 10.7 L7 ...

Page 16

LNBP10 SERIES - LNBP20 PowerSO-20 MECHANICAL DATA DIM. MIN. TYP 0. 0.40 c 0.23 D (1) 15.80 E 13.90 e 1.27 e3 11.43 E1 (1) 10. 0. ...

Page 17

PowerSO-10 MECHANICAL DATA mm DIM. MIN. TYP. A 3.35 A1 0.00 B 0.40 c 0.35 D 9.40 D1 7.40 E 9.30 E1 7.20 E2 7.20 E3 6.10 E4 5.90 e 1.27 F 1.25 H 13.80 h 0.50 L 1.20 q ...

Page 18

LNBP10 SERIES - LNBP20 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may ...

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