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LNBK20D2

LNB SUPPLY AND CONTROL VOLTAGE REGULATOR (PARALLEL INTERFACE)

STMicroelectronics 

LNBK20D2

TABLE A: PIN CONFIGURATIONS

PIN N° SYMBOL

NAME

FUNCTION

1

LLC

2

OLF

3

4

5, 6, 15,

16

7, 13

MI

LNBB

GND

N.C.

Line Length Compens.

(1V typ)

Over Load Flag

Master Input

Output Port

Ground

Logic control input: see truth table

Logic output (open collector). Normally in HIGH

IMPEDANCE, goes LOW when current or thermal overload

occurs

In stand-by mode, the voltage on MI is routed to LNBA pin.

Can be left open if bypass function is not needed

See truth tables for voltage and port selection

Circuit Ground. It is internally connected to the die frame

Not Connected

8

VCC1

Supply Input 1

15V to 27V supply. It is automatically selected when

VOUT = 13 or 14V

9

VCC2

Supply Input 2

22V to 27V supply. It is automatically selected when

VOUT = 18 or 19V

10

LNBA

Output Port

See truth table voltage and port selection. In stand-by mode

this port is powered by the MI pin via the internal Bypass

Switch

11

VSEL

Output Voltage Selection: Logic control input: see truth table

13 or 18V (typ)

12

EN

Port Enable

Logic control input: see truth table

14

OSEL

Port Selection

Logic control input: see truth table

18

ENT

22KHz Tone Enable

Logic control input: see truth table

19

CEXT

External Capacitor

Timing Capacitor used by the Dynamic Overload protection.

Typical application is 4.7µF for a 1200ms cycle

20

EXTM

External Modulator

External Modulation Input. Needs DC decoupling to the AC

source. if not used, can be left open.

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

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter²

Value

Unit

VI

DC Input Voltage (VCC1, VCC2, MI)

28

V

IO

Output Current (LNBA, LNBB)

Internally Limited

mA

VI

Logic Input Voltage (ENT, EN OSEL, VSEL, LLC)

-0.5 to 7

V

ISW Bypass Switch Current

900

mA

PD

Power Dissipation at Tcase < 85°C

3

W

Tstg

Storage Temperature Range

-40 to +150

°C

Top

Operating Junction Temperature Range

-40 to +125

°C

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

not implied.

THERMAL DATA

Symbol

Parameter

Rthj-case Thermal Resistance Junction-case

Value

15

Unit

°C/W

3/14

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