Sharp LC-32LE630E Service Manual page 88

LC-32LE63x
LC-40LE63x
LC-46LE63x
IC Data Sheets (continued)
8.13 Diagram DVBS supply
Block diagram
Pinning information
B08B, LNBH23Q (IC 7T50)
ISEL ISEL
LX LX
Rsense Rsense
EN EN
VSEL VSEL
P-GND P-GND
Vup Vup
Linear Post-reg Linear Post-reg
+Modulator +Modulator
VoRX VoRX
+Protections +Protections
+Diagnostics +Diagnostics
VoTX VoTX
TTX TTX TTX
EXTM EXTM
DSQIN DSQIN
V CTRL V CTRL
1 n.c .
2 n.c .
3 n.c .
4 LX
5 P -G ND
6 S D A
7 n.c .
8 n.c .
9 S C L
10 A D D R
11 D S Q out
12 D S Q IN
13 E XTM
14 TTX
15 B Y P
16 n.c .
17 n.c .
18 V c c -L
19 V c c
20 A -G N D
21 V oR X
22 V oTX
23 n.c .
24 n.c .
25 n.c .
26 n.c .
27 V up
28 IS E L
29 D E TIN
30 V CTRL
31 n.c .
32 n.c .
Figure 8-13 Internal block diagram and pin configuration
TTX TTX ADDR ADDR SDA SCL SDA SCL Vcc Vcc Vcc
Preregulator Preregulator
+U.V.lockout +U.V.lockout
+P.ON reset +P.ON reset
VSEL VSEL
TTX TTX
I2C interface I2C interface
ITEST ITEST
VOUT Control VOUT Control
TEN TEN
I2C Diagnostics I2C Diagnostics
22KHz 22KHz 22KHz
Oscill. Oscill. Oscill.
22KHz Tone 22KHz Tone
Amp. Diagn. Amp. Diagn.
22KHz Tone 22KHz Tone
Freq. Detector Freq. Detector
LNBH23 LNBH23
A-GND A-GND
Epad Connected with power grounds and to
the ground layer through vias
to dissipate the heat.
88
Byp Byp Byp Vcc- Vcc- Vcc-
L L L
EN EN
DETIN DETIN
DSQOUT DSQOUT
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