G1421 Datasheet, PDF (20/24 Pages) Global Mixed-mode Technology Inc – 2W Stereo Audio Amplifier with No Headphone Coupling Capacitor Function

Global Mixed-mode Technology Inc.
Application Circuits (Continued)
No DC Blocking Capacitors Application
G1421
RFR
20KΩ
CIR
CFR
1µF
AUDIO SOURCE
CBL
4.7µF
GND/HS
1
TJ
2
LOUT+
3
RIR _LLINEIN
4
10KΩ
LHPIN 5
LBYPASS
6
RBYPASS ₁₉
SHUTDWON
8
RC
4.7Ω
CC
0.1µF
MUTE OUT ₉
LOUT-
10
MUTE IN
11
GND/HS
12
G1421
GND/HS
24
VOL
23
ROUT+
22
RLINEIN ^RIL
21
10KΩ
20 RHPIN
LVDD
7
RVDD
18
HP-IN
17
16 ^HP/LINE
ROUT-
15
SE/BTL
14
GND/HS
13
CIL
RFL
1µF
20KΩ
AUDIO SOURCE
4.7µF
4.7µF
CFL
RC
4.7Ω
CC
0.1µF
1
2
3
4
5
PHONOJACK
Logical Truth Table
SE/ BTL
X
Low
High
X
HP/ LINE
X
X
X
X
INPUTS
HP-IN
X
X
X
High
Mute In
----
High
High
High
Shutdown
High
----
----
----
Low
Low
Low
Low
Low
Low
High
Low
Low
Low
High
Low
Low
Low
Low
High
High
Low
Low
Low
X
Low
High
Low
Low
X
High
High
Low
Low
OUTPUT
Mute Out
----
High
High
High
Low
Low
Low
Low
Low
Low
Input
X
X
X
X
L/R Line
L/R HP
L/R Line
L/R HP
L/R Line
L/R HP
AMPLIFIER STATES
L/R Out+ L Out- R Out-
----
----
----
VDD/2 VDD/2 VDD/2
VDD/2
----
----
VDD/2 VDD/2 ----
BTL
Output
BTL
BTL
Output Output
BTL
Output
BTL
BTL
Output Output
SE
----
----
Output
SE
----
----
Output
SE
VDD/2 ----
Output
SE
VDD/2 ----
Output
Mode
Mute
Mute
Mute
Mute
BTL
BTL
SE
SE
HP-IN
HP-IN
Ver: 1.6
Aug 04, 2005
TEL: [phone]
http://www.gmt.com.tw
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