Gsm Power Amplifi Er Module - LG GD910 Service Manual

4. RF Circuit Technical Brief
4.4 GSM Power Amplifier Module
C509
6.8p
L405
27nH
L406
2.7nH
C449
1.5p
LGE Internal Use Only
PGND
15
GND3
8
GND2
11
GND1
14
U402
BY_CAP2
9
BY_CAP1
13
GSM850_900_OUT
10
DCS_PCS_OUT
12
TQM7M5005
C450 C451
10n 10n
[Figure 4.4-1] Schematic Diagram of 2.5G PAM(TQM7M5005)
[Table 4.4-1] TQM7M5005 Pin description
GD910 service manual
VBAT
GSM850_900_IN
7
TX_EN
6
R408 1.2K
VRAMP
5
VBATT
4
BS
3
MODE_SELECT
2
DCS_PCS_IN
1
C453 C448 C454 C455 C456
33p 10u 18p 0.1u 39p
- 56 - Copyright © 2009 LG Electronics. Inc. All right reserved.
LBAND_IN
TXON_PA
PA_LEVEL
2G_BS
PA_MODE
HBAND_IN
Only for training and service purposes