Ver: 1.5

Aug 04, 2005

TEL: 886-3-5788833

http://www.gmt.com.tw

1

G1420

Global Mixed-mode Technology Inc.

2W Stereo Audio Amplifier

Features

Depop Circuitry Integrated

Output Power at 1% THD+N, VDD=5V

--1.8W/CH (typical) into a 4

Ω Load

--1.2W/CH (typical) into a 8

Ω 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

Multimedia Monitors

Stereo Power Amplifiers for Portable Audio

Systems

General Description

G1420 is a stereo audio power amplifier in 24pin

TSSOP thermal pad package. It can drive 1.8W con-

tinuous RMS power into 4

Ω 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.

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.

Ordering Information

ORDER

NUMBER

ORDER NUMBER

(Pb free)

TEMP.

RANGE

PACKAGE

G1420F31U

G1420F31Uf

-40°C to +85°C

TSSOP-24 (FD)

Note: F3: TSSOP-24 (FD)

U: Tape & Reel

Pin Configuration

ROUT+

RLINEIN

RHPIN

RBYPASS

RVDD

NC

HP/LINE

ROUT-

SE/BTL

GND/HS

LOUT+

LLINEIN

LHPIN

LBYPASS

LVDD

SHUTDOWN

MUTE OUT

LOUT-

MUTE IN

G1420

GND/HS

TSSOP-24 (FD)

13

24

23

22

21

20

19

18

17

16

15

5

6

7

8

9

10

11

12

1

4

3

2

14

TJ

NC

14

Thermal

Pad

Top View

Bottom View

GND/HS

GND/HS

Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.

ROUT+

RLINEIN

RHPIN

RBYPASS

RVDD

NC

HP/LINE

ROUT-

SE/BTL

GND/HS

LOUT+

LLINEIN

LHPIN

LBYPASS

LVDD

SHUTDOWN

MUTE OUT

LOUT-

MUTE IN

G1420

GND/HS

TSSOP-24 (FD)

13

24

23

22

21

20

19

18

17

16

15

5

6

7

8

9

10

11

12

1

4

3

2

14

TJ

NC

14

Thermal

Pad

Top View

Bottom View

GND/HS

GND/HS

Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.