SGS Thomson Microelectronics LNBP12SP, LNBP11SP, LNBP10SP, LNBP20PD, LNBP20CR Datasheet

...

LNBP10 SERIES



LNB SUPPLY AND CONTROL VOLTAGE

REGULATOR (PARALLEL INTERFACE)

■ COMPLETEINTERFACE FOR TWOLNBs

REMOTE SUPPLYANDCONTROL

■ LNB SELECTIONAND STAND-BYFUNCTION

■ BUILT-INTONEOSCILLATORFACTORY

TRIMMEDAT22KHz

■ FASTOSCILLATORSTART-UP

FACILITATESDiSEqC ENCODING

■ TWOSUPPLY INPUTSFOR LOWEST

DISSIPATION

■ BYPASSFUNCTIONFOR SLAVE

OPERATION

■ LNB SHORTCIRCUIT PROTECTIONAND

DIAGNOSTIC

■ AUXILIARYMODULATIONINPUTEXTENDS

FLEXIBILITY

■ CABLELENGTHCOMPENSATION

■ INTERNALOVERTEMPERATURE

PROTECTION

■ BACKWARDCURRENT PROTECTION

LNBP20

Multiwatt-15

PowerSo-20 PowerSO-10

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 the antenna downconverters to be 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.

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 V

CC1

and V

. They must be powered

CC2

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 affecting any other circuit performance.

The ENT (Tone Enable)pin activates the internal oscillatorso that the DC output is modulatedby a

±0.3 V, 22KHz (typ.) square wave. This internal oscillator is factory trimmed within a tolerance of

±2KHz, thus no further adjustments neither externalcomponents are required.

A burst coding of the 22KHz tone can be

September 1998

1/18

LNBP10 SERIES - LNBP20

accomplished thanks to the fast response of the ENT input and the promptoscillator start-up. This helps designers who want to implement the DiSEqC protocols(*).

In order to improve design flexibility and to allow implementation of newcoming LNB remote control standards, an analogic modulation input pin is available (EXTM). An appropriate DC blocking capacitor must be used to couple the modulatingsignal source to the EXTM pin. When external modulation is not used, the relevant pin canbe leftopen.

Two pins are dedicated to the overcurrent protection/monitoring: CEXT and OLF. The overcurrent protection circuit works dynamically: as soon as an overloadis detectedin either LNB output, the output is shut-down for a time Toff determined by the capacitor connected between CEXT and GND. Simultaneously the OLF pin,

from HIGH IMPEDANCE state goes LOW. After the time has elapsed, the outputis resumedfor a time t

=1/15t

(typ.) and OLF goes in HIGH

off

IMPEDANCE. If the overload is still present, the protection circuit will cycle again through t

until the overload is removed. Typical ton+t

off

and

value is 1200ms when a 4.7µF external capacitor is used.

This dynamic operation can greatly reduce the power dissipation in short circuit condition, still ensuring excellent power-on start up even with highlycapacitiveloads on LNBoutputs.

The device is packaged in Multiwatt15 for thru-holes mounting and in PowerSO-20 for surface mounting. 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 protectionagainst overheatingdamage.

that is an open collector diagnostic output flag,

(*): External components are needed to comply to level 2.x and above (bidirectional) DiSEqC bus hardware requirements. DiSEqC is a trademark of EUTELSAT.

ORDERING NUMBERS

Type Multiwatt-15 PowerSO-20 PowerSO-10

LNBP10 LNBP11 LNBP12 LNBP13 LNBP14 LNBP15 LNBP16 LNBP20 LNBP20CR LNBP20PD

LNBP10SP LNBP11SP LNBP12SP LNBP13SP LNBP14SP LNBP15SP LNBP16SP

off

PINCONFIGURATIONS

Multiwatt-15 PowerSO-20 PowerSO-10

2/18

LNBP10 SERIES - LNBP20

TABLEA: PIN CONFIGURATIONS

SYMBOL NAME FUNCTION PIN NUMBER vs SALES TYPE(LNBP)

20CR 20PD 10SP 11SP 12SP 13SP 14SP 15SP 16SP

CC1

Supply Input 1 15V to25Vsupply. It is

121111111

automatically selected

=13or14V

OUT

232222222

CC2

whenV

Supply Input 2 22V to25Vsupply. It is

automatically selected whenV

LNBA Output Port Seetruth tables forvoltage

=18or19V

OUT

343333333 and port selection. In stand-bymode this port is poweredby the MI pinvia theinternal Bypass Switch

VSEL Output Voltage

Selection: 13 or

Logic control input: See truthtable

454444444

18V (t yp)

EN Port Enable Logiccontrolinput: See

565555555 truthtable

OSEL Port Selection Logiccontrolinput: See

7 7 9 NANANANANANA truthtable

GND Gr ound Circuit Ground.Itis

internally connected to the dieframe

10 11 20

ENT 22 KHz Tone

Enable

CEXT External Capacitor Timingcapacitor used by

Logic control input: See truthtable

9137777777

10148888888 theDynamicOverload Protection.Typical application is 4.7µFfora 1200ms cycle

EXTM External

Modulat i on

ExternalModulation Input. Needs DC decoupling to

11 15 NA NA NA 9 NA 9 9 theAC source. If notused,

canbe leftopen.

LLC Line Length

Compens. (1V t yp)

OLF O ver Load F lag Logic output (open

Logic control input: See truthtable

12 16 NA NA 9 NA 9 NA 10

13 17 NA 9 NA NA 10 10 NA Collector). Normally in HIGH IMPEDANCE,goes LOW when current or thermal overload occurs.

MI Master Input In stand-by mode, the

14 18 NA 10 10 10 NA NA NA voltage onMI is routed to LNBApin. Canbe left openif bypass functionis notneeded

LNBB Output Port Seetruth tables forvoltage

15 19 10 NA NA NA NA NA NA and port selection.

NOTE: The limited pin availability of the PowerSO-10 package leads to drop some functions.

6666666

3/18

LNBP10 SERIES - LNBP20

ABSOLUTE MAXIMUMRATING

Symbol Parameter Value Unit

DC InputVoltage(VCC1,VCC2,MI) 28 V

OutputCurrent (LNBA, LNBB) Internally limited

Logic InputVoltage (ENT, EN,OSEL, VSEL,LLC) -0.5 to 7 V

BypassSwitchCurrent 900 mA

Power Dissipation at T

tot

StorageTemperature Range - 40 to 150

stg

Operating JunctionTemperature Range - 40 to 125

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied

THERMAL DATA

Symbol Parameter Value Unit

thj-case

Thermal ResistanceJunction-case 2

LOGICCONTROLS TRUTH TABLES

Control I/O Pin Name L H

OUT OLF I

IN ENT 22KHz tone O F F 22KHz tone ON IN EN See t a ble below S ee table below IN OS EL See t a ble below S ee table below IN V S E L See table below See table below IN LLC See t a ble below S ee table below

<85oC14W

case

OUT>IOMAX

or Tj>150OCI

OUT<IOMAX

o o

C/W

C C

EN OSEL VSEL LLCP V

LXXX V

LNBA

-0.4V (t yp.) Disabled

H L L L 13V (t yp.) Disabled H L H L 18V (typ. ) Disabled H L L H 14V (t yp.) Disabled H L H H 19V (typ.) Disabled H H L L Disable d 13V (typ.) H H H L Disable d 18V (typ.) H H L H Disabled 14V (typ.) H H H H D isable d 19V (typ.)

NOTE: All logicinput pins have internal pull-down resistor (typ. = 250KΩ)

LNBB

4/18

BLOCK DIAGRAM

LNBP10 SERIES - LNBP20

5/18

LNBP10 SERIES - LNBP20

ELECTRICAL CHARACTERISTICS FOR LNBP SERIES (Tj=0 to85oC, Ci= 0.22 µF, Co= 0.1 µF,

EN=H,ENT=L, LLC=L,V

=16V,V

IN1

Symbol Parameter Test Conditions Min. Typ. Max. Unit

IN1VCC1

IN2VCC2

∆V

SupplyVoltage IO=500mA, ENT=H, VSEL=L, LLC=L

SupplyVoltage IO=500mA, ENT=VSEL=H, LLC=L

OutputVoltage IO=500 mA, VSEL=H, LLC=L

OutputVoltage IO=500 mA, VSEL=L, LLC=L

LineRegulation V

LoadRegulation V

SVR Supply VoltageRejection

I t

OutputCurrent Limiting 500 650 800 mA

MAX

Dynamic Overload Protection

OFF

OFF Time

Dynamic Overload Protection

ON Time F A

t G V

ToneFrequency ENT=H 20 22 24 KHz

TONE

ToneAmplitude ENT=H 0.4 0.6 0.8 Vpp

TONE

ToneDuty Cucle ENT=H 40 50 60 %

TONE

ToneRise or FallTime ENT=H 5 10 15 µs

r,tf

External Modulation Gain ∆

EXT M

External Modulation Input

EXTM

Voltage

External Modulation

EXT M

Impedance

BypassSwitchVoltage Drop

(MI toLNBA)

Overload FlagPinLogic Low IOL=8mA 0.28 0.5 V

Overload FlagPinOFF State

Leakage Current Control Input PinLogic Low 0.8 V

Control Input PinLogic High 2.5 V

Control Pins Input Current VIH=5V 20 µA

Supply Current OutputsDisabled (EN=L) 0.3 1 mA

Supply Current ENT=H, I

OutputBackward Current EN=L, V

OBK

Thermal ShutdownThreshold 150

SHDN

IN2

=23V,I

=50mA, (unless otherwisespecified)

OUT

=500mA, ENT=H, VSEL=L, LLC=H1516

=500mA, ENT=VSEL=H, LLC=H

=500 mA, VSEL=H, LLC=H

=500 mA, VSEL=L, LLC=H

=15to18V, V

IN1

=22to25V, V

IN2 IN1=VIN2

=50to500mA

IN1=VIN2

=22V, V

=23± 0.5Vac,fac=50 KHz

Outputshorted, C

/∆V

OUT

, f = 10Hzto 40KHz

EXTM

OUT OUT

EXT

=13V =18V

= 13 or 18V,

OUT

=4.7µF

22 23

17.3 18 19

12.5 13 14

80 180 mV

45 dB

1100 ms

OFF

4 4

/15 ms

25 25

18.7 V

13.5 V

40 40

AC Coupling 400 mV

f = 10Hzto 40KHz 400 Ω

EN=L, ISW=300mA, V

= 4V 0.35 0.6 V

CC2-VMI

VOH=6V 10 µA

= 500mA 3.1 6 mA

OUT

0.23mA

IN1=VIN2

LNBA=VLNBB

=22V or floating

=18V

V V

mV mV

6/18

+ 12 hidden pages