LG KF750 Service Manual page 76

D. Power Amplifier Module
The SKY77174 Power Amplifier module is a fully matched 10-pad surface mount module developed
for Wideband Code Division Multiple Access (WCDMA) applications. This small and efficient power
amplifier packs full coverage of the 1920-1980 MHz bandwidth into a single compact package.
W T X _ B A N D _ 1 _ E N
W P A _ B A I S
C 2 0 4
C 2 0 6 1 0 p
2 2 p
C 2 0 7
W T X M O D _ B A N D I _
5 6 p
C 2 1 0 C 2 0 9
D I N D I N
V B A T
C 2 1 3
D I N
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-7-5. SKY77174 Functional Block Diagram
V C C _ P A
C 2 0 0
0 0 . 1 u
C 2 0 3
1 0 0 0 p C 2 0 5
1 0 0 0 p
U 2 0 0 S K Y 7 7 1 7 4
1 1 1
V C C 1 P G N D
2 1 0
E N A B L E V C C 2
3 9
L 2 0 0
V C O N T R O L G N D 3
1 n H
4 8
R F _ N I R F _ O U T
7
G N D 2
8 2 . n H
5 6 L 2 0 2
V B A I S G N D 1
Figure 3-7-6. WCDMA PAM schematic
3. TECHNICAL BRIEF
L D C 1 8 1 G 9 5 1 9 B 3 - 2 7
N 2 0 0
1 6
N I M _ O U T
2 5
G N D 1 G N D 2
C 2 1 1
3 4
D I N C _ O U T T E R M N I A T E
W P O W _ S E N S E
- 77 -
S I 2 0 0 C E S 2 0 1 G 9 5 D C B 0 0 0
G N D 1 G N D 2
N I O U T W T X _ B A N D _ 1
G N D 3 G N D 4
LGE Internal Use Only