LNBH29 datasheet(10/31 Pages) STMICROELECTRONICS

Il numero della parte	LNBH29

Spiegazioni elettronici	LNB supply and control IC with step-up and I²C interface

PDF	31 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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10 / 31 page

Pin configuration

LNBH29

10/31

DocID023065 Rev 3

Pin n°

Symbol

Name

Pin function

DSQIN

(LNBH29)

DiSEqC tone

envelope input

Available for LNBH29 version: this pin accepts DiSEqC envelope

codes (TTL compatible) from the main DiSEqC microcontroller. The

LNBH29 uses this code to enable the internally generated 22 kHz

carrier superimposed to the VOUT pin DC voltage. See Figure 5.

EXTM

(LNBH29E)

External 22 kHz

tone input

Available for LNBH29E version: the “external tone modulation” input

acts on the integrated linear regulator loop to superimpose an

external 22 kHz signal to the VOUT pin DC voltage. Needs DC

decoupling to the AC source. See Figure 6.

Epad

Exposed pad

To be connected with power grounds and to the ground layer

through vias to dissipate the heat.

1, 4,

11, 15

N.C.

Not internally

connected

Not internally connected pins. These pins can be connected to GND

to improve thermal performance.

Table 2. Pin description (continued)

LNBH29 Scheda tecnica(PDF) 10 Page - STMicroelectronics