G1420
Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
Features
General Description
Depop Circuitry Integrated
G1420 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 1.8W con-
tinuous RMS power into 4Ω load per channel in
Bridge-Tied Load (BTL) mode at 5V supply voltage. Its
THD is smaller than 1% under the above operation
condition. To simplify the audio system design in the
notebook application, G1420 supports the Bridge-Tied
Load (BTL) mode for driving the speakers, Single-End
(SE) mode for driving the headphone. G1420 can
mute the output when Mute-In is activated. For the low
current consumption applications, the SHDN mode is
supported to disable G1420 when it is idle. The current
consumption can be further reduced to below 5µA.
Output Power at 1% THD+N, VDD=5V
--1.8W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
Bridge-Tied Load (BTL), Single-Ended (SE)
Stereo Input MUX
Mute and Shutdown Control Available
Surface-Mount Power Package
24-Pin TSSOP-P
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
G1420 also supports two input paths, that means two
different gain loops can be set in the same PCB and
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
choosing either one by setting HP/LINE pin. It en-
hances the hardware designing flexibility.
Ordering Information
ORDER
NUMBER
G1420F31U
ORDER NUMBER
(Pb free)
TEMP.
PACKAGE
RANGE
G1420F31Uf
-40°C to +85°C
TSSOP-24 (FD)
Note: F3: TSSOP-24 (FD)
U: Tape & Reel
Pin Configuration
G1420
GND/HS
NC
GND/HS
24
23
1
TJ
LOUT+
LLINEIN
2
3
22 ROUT+
RLINEIN
4
5
6
21
20 RHPIN
LHPIN
LBYPASS
LVDD
Thermal
Pad
19 RBYPASS
18
17
16
RVDD
NC
7
8
SHUTDOWN
MUTE OUT
LOUT-
9
HP/LINE
10
15 ROUT-
14 SE/BTL
MUTE IN 11
14
12
13
GND/HS
GND/HS
Top View
Bottom View
TSSOP-24 (FD)
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.5
Aug 04, 2005
1