TPS59640RSLT Datasheet TPS59640RSLT, TPS51640ARSLT, LNBH21PD-TR | P1-P3

1/20April 2004

■ COMPLETE INTERFACE BETWEEN LNB

AND I

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

DiSEqC

ENCODING

■ BUILT-IN 22KHz TONE DETECTOR

SUPPORTS BI-DIRECTIONAL DiSEqC

2.0

■ 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

■ OVERLOADAND OVER-TEMPERATURE I

DIAGNOSTIC BITs

■ LNB SHORT CIRCUIT SOA PROTECTION

WITH I

C DIAGNOSTIC BIT

■ +/- 4KV ESD TOLERANT ON INPUT/

OUTPUT POWER PINS

DESCRIPTION

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

standard interfacing.

LNBH21

LNB SUPPLY AND CONTROL IC WITH

STEP-UP CONVERTER AND I

C INTERFACE

DSQIN

Enable

Preregul.+

U.V.lockout

+P.ON res.

V Select

Linear Post-reg

+Modulator

+Protections

Vup

VoRX

SDA

SCL

Vcc

Diagnostics

I²C interf.

Tone

Detector

DSQOUT

VoTX

DETIN

LNBH21

Byp

Gate

Sense

EXTM

ADDR

22KHz

Oscill.

TEN

Vup-Feedback

Step-up PWM

Controller

ISEL

BLOCK DIAGRAM

PowerSO-20

LNBH21

2/20

ORDERING CODES

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is

not implied.

THERMAL DATA

PIN CONFIGUARATION (top view)

TYPE

PowerSO-20

(Tube)

PowerSO-20

(Tape & Reel)

LNBH21 LNBH21PD LNBH21PD-TR

Symbol Parameter Value Unit

DC Input Voltage

-0.3 to 16 V

DC Input Voltage

-0.3 to 25 V

Output Current

Internally Limited mA

TX/RX DC Output Pins Voltage

-0.3 to 25 V

Logic Input Voltage (SDA, SCL, DSQIN, ISEL)

-0.3 to 7 V

DETIN

Detector Input Signal Amplitude

-0.3 to 2

Logic High Output Voltage (DSQOUT)

-0.3 to 7 V

GATE

Gate Current

±400 mA

SENSE

Current Sense Voltage

-0.3 to 1 V

ADDRESS

Address Pin Voltage

-0.3 to 7 V

stg

Storage Temperature Range

-40 to +150 °C

Operating Junction Temperature Range

-40 to +125 °C

Symbol Parameter Value Unit

thj-case

Thermal Resistance Junction-case

2°C/W

LNBH21

3/20

TABLE A: PIN CONFIGURATIONS

PIN N° SYMBOL NAME FUNCTION

18 V

Supply Input 8V to 15V IC supply. A 220µF bypass capacitor to GND with a 470nF

(ceramic) in parallel is recommended

17 GATE External Switch Gate External MOS switch Gate connection of the step-up converter

16 SENSE Current Sense Input DC/DC Current Sense comparator input. Connected to current

sensing resistor

19 V

Step-up Voltage Input of the linear post-regulator. The voltage on this pin is monitored

by internal step-ut controller to keep a minimum dropout across the

linear pass transistor

RX Output Port during

22KHz Tone RX

RX Output to the LNB in DiSEqC 2.0 application. See truth tables for

voltage selections on page 8 and description on page 5.

12 SDA Serial Data

Bidirectional data from/to I

C bus.

13 SCL Serial Clock

Clock from I

C bus.

14 DSQIN DiSEqC Input When the TEN bit of the System Register is LOW, this pin will accept

the DiSEqC code from the main µcontroller. The LNBH21 will use this

code to modulate the internally generated 22kHz carrier. Set to GND

this pin if not used.

9 DETIN Tone Detector Input 22kHz Tone Detector Input. Must be AC coupled to the DiSEcQ 2.0

bus.

15 DSQOUT DiSEqC Output Open drain output of the tone Detector to the main µcontroller for

DiSEcQ 2.0 data decoding. It is LOW when tone is detected.

5 EXTM External Modulator External Modulation Input acts on V

TX. Needs DC decoupling to the

AC source. If not used, can be left open.

1, 6, 10,

11, 20

GND Ground Pins Connected to Ground.

8 BYP Bypass Capacitor Needed for internal preregulator filtering

3 ISEL Current Limit Select Set high or floating for Iout<=750mA, connect to ground for

OUT

≤ 450mA.

TX Output Port during

22KHz Tone TX

Output of the linear post-regulator/modulator to the LNB. See truth

tables for voltage selections.

7 ADDR Address Setting

Four I

C bus addresses available by setting the Address Pin level

voltage. See address pin characteristics table.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P20

TPS59640RSLT

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TPS59640RSLT

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