Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
General Description
G1420
Features
ꢀDepop Circuitry Integrated
ꢀ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
G1420 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 1.8W con-
tinuous RMS power into 4 load per channel in
Ω
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 cur-
rent consumption can be further reduced to below
5µA.
ꢀMute and Shutdown Control Available
ꢀSurface-Mount Power Package
24-Pin TSSOP-P
Applications
ꢀStereo Power Amplifiers for Notebooks or
Desktop Computers
ꢀMultimedia Monitors
G1420 also supports two input paths, that means two
different gain loops can be set in the same PCB and
choosing either one by setting HP/LINE pin. It en-
hances the hardware designing flexibility.
ꢀStereo Power Amplifiers for Portable Audio
Systems
Ordering Information
ORDER
TEMP.
PACKAGE PACKING
NUMBER
RANGE
G1420F31U -40°C to +85°C TSSOP-24L Tape & Reel
G1420F31T -40°C to +85°C TSSOP-24L
Tube
Pin Configuration
G1420
GND/HS
NC
22 ROUT+
RLINEIN
20 RHPIN
19 RBYPASS
GND/HS
24
23
1
TJ
LOUT+
LLINEIN
2
3
4
5
6
7
8
9
21
LHPIN
LBYPASS
LVDD
SHUTDOWN
MUTE OUT
LOUT-
Thermal
Pad
18
17
16
RVDD
NC
HP/LINE
10
15 ROUT-
14 SE/BTL
MUTE IN 11
14
12
13
GND/HS
GND/HS
Top View
24Pin TSSOP
Bottom View
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
May 23, 2003
1