LNBK14SP-TR 데이터 시트보기 (PDF) - STMicroelectronics

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LNBK14SP-TR

LNB SUPPLY AND CONTROL VOLTAGE REGULATOR (PARALLEL INTERFACE)

STMicroelectronics 

LNBK10 SERIES - LNBK20

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

modulating signal source to the EXTM pin. When

external modulation is not used, the relevant pin

can be left open.

Two pins are dedicated to the overcurrent

protection/monitoring: CEXT and OLF. The

overcurrent protection circuit works dynamically:

as soon as an overload is detected in 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, that

is an open collector diagnostic output flag, from

HIGH IMPEDANCE state goes LOW.

After the time has elapsed, the output is resumed

for a time ton=1/15toff (typ.) and OLF goes in HIGH

IMPEDANCE. If the overload is still present, the

protection circuit will cycle again through toff and

ton until the overload is removed. Typical ton+toff

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

highly capacitive loads on LNB outputs.

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

protection against overheating damage.

™ ™ (*): External components are needed to comply to level 2.x and above (bidirectiona) DiSEqC bus hardware requirements. DiSEqC is a

trademark or EUTELSAT.

ORDERING CODES

TYPE

LNBK10

LNBK11

LNBK12

LNBK13

LNBK14

LNBK15

LNBK16

LNBK20

(*) Available on request

Multiwatt-15

LNBK20CR

PowerSO-20

LNBK20PD-TR

PowerSO-10

LNBK10SP-TR (*)

LNBK11SP-TR (*)

LNBK12SP-TR (*)

LNBK13SP-TR (*)

LNBK14SP-TR (*)

LNBK15SP-TR (*)

LNBKP16SP-R (*)

PIN CONFIGUARATION (top view)

Multiwatt-15

2/18

PowerSo-20

PowerSO-10

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