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Global Mixed-mode Technology
Global Mixed-mode Technology

G1427 Datasheet Preview

G1427 Datasheet

2W Stereo Audio Amplifier

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G1427 pdf
Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
6dB\10dB\15.6dB\21.6dB Selectable Gain Settings
G1427
Features
„ Internal Gain Control, Which Eliminates Exter-
nal Gain-Setting Resistors
„ Depop Circuitry Integrated
„ Output Power at 1% THD+N, VDD=5V
--2.0W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
„ Bridge-Tied Load (BTL), Single-Ended (SE)
www.DataSheet„4U.Scotmereo Input MUX
„ PC-Beep Input
„ Fully differential Input
„ 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
G1427 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 2.0W 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, G1427 supports the Bridge-Tied
Load (BTL) mode for driving the speakers, Single-End
(SE) mode for driving the headphone. For the low
current consumption applications, the SHDN mode is
supported to disable G1427 when it is idle. The current
consumption can be reduced to 160µA (typically).
Amplifier gain is internally configured and controlled by
two terminals (GAIN0, GAIN1). BTL gain settings of
6dB, 10dB, 15.6dB, 21.6dB are provided, while SE
gain is always configured as 4.1dB (inverting) for
headphone driving. G1427 also supports two input
paths, that means two different amplitude AC signals
can be applied and chosen by setting HP/ LINE pin. It
enhances the hardware designing flexibility.
Ordering Information
ORDER
NUMBER
G1427F31U
Note: U:Tape & Reel
(FD): Thermal Pad
ORDER NUMBER
(Pb free)
G1427F31Uf
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-24 (FD)
Pin Configuration
GND/HS
GAIN0
GAIN1
LOUT+
LLINEIN
LPHIN
PVDD
RIN
LOUT-
LIN
BYPASS
GND/HS
1
2
3
4
5
6
7
8
9
10
11
12
G1427
Top View
TSSOP-24
24 GND/HS
23 RLINEIN
22 SHUTDOWN
21 ROUT+
20 RHPIN
19 VDD
18 PVDD
17 HP/LINE
16 ROUT-
15 SE/BTL
14 PC-BEEP
13 GND/HS
Ver: 1.3
Sep 23, 2005
1
Thermal
Pad
Bottom View
TEL: 886-3-5788833
http://www.gmt.com.tw



Global Mixed-mode Technology
Global Mixed-mode Technology

G1427 Datasheet Preview

G1427 Datasheet

2W Stereo Audio Amplifier

No Preview Available !

G1427 pdf
Global Mixed-mode Technology Inc.
G1427
Absolute Maximum Ratings
Supply Voltage, VCC…………………..…..…….….…...6V
Operating Ambient Temperature Range
TA…….…………………………….……….-40°C to +85°C
Maximum Junction Temperature, TJ…..……….….150°C
Storage Temperature Range, TSTG….…-65°C to+150°C
Reflow Temperature (soldering, 10sec)……..……260°C
Power Dissipation (1)
TA 25°C ………...….…………………………..2.7W
TA 70°C ………...….…………………………..1.7W
Electrostatic Discharge, VESD
Human body mode..…………………….…………3000(2)
Note:
(1) : Recommended PCB Layout
(2) : Human body model : C = 100pF, R = 1500Ω, 3 positive pulses plus 3 negative pulses
www.DataSheetE4Ul.ecocmtrical Characteristics
DC Electrical Characteristics, TA=+25°C
PARAMETER
Supply voltage VDD
High-Level Input voltage, VIH
Low-Level Input voltage, VIL
DC Differential Output Voltage
Supply Current in Mute Mode
IDD in Shutdown
SYMBOL
CONDITION
VDD
VIH SE/ BTL , HP/ LINE , SHUTDOWN , GAIN0,
GAIN1
VIL SE/ BTL , HP/ LINE , SHUTDOWN , GAIN0,
GAIN1
VO(DIFF)
IDD
VDD = 5V,Gain = 2
VDD = 5V
Stereo BTL
Stereo SE
ISD VDD = 5V
MIN
4.5
2
---
---
---
---
TYP
5
---
MAX
5.5
---
UNIT
V
V
--- 0.8
V
5 50 mV
7.5
4
13
7
mA
160 300
µA
(AC Operation Characteristics, VDD = 5.0V, TA=+25°C, RL = 4Ω, unless otherwise noted)
PARAMETER
SYMBOL
CONDITION
THD = 1%, BTL, RL = 4Ω G=-2V/V
Output power (each channel) see Note
P(OUT)
THD = 1%, BTL, RL = 8Ω G=-2V/V
THD = 10%, BTL, RL = 4Ω G=-2V/V
THD = 10%, BTL, RL = 8Ω G=-2V/V
THD = 0.1%, SE, RL = 32Ω
PO = 1.6W, BTL, RL = 4Ω G=-2V/V
Total harmonic distortion plus noise
THD+N PO = 1W, BTL, RL = 8Ω G=-2V/V
PO = 75mW, SE, RL = 32Ω
VI = 1V, RL = 10KΩ, SE
Maximum output power bandwidth
BOM THD = 5%
Power supply ripple rejection
PSRR F=1kHz, BTL mode G=-2V/V
CBYP=1µF
Channel-to-channel output separation
f = 1kHz
Line/HP input separation
BTL attenuation in SE mode
Input impedance
ZI
Signal-to-noise ratio
PO = 500mW, BTL, G=-2V/V
Output noise voltage
Vn BTL, G=-2V/V, A Weighted filter
Note :Output power is measured at the output terminals of the IC at 1kHz.
MIN
---
---
---
---
---
---
---
---
---
---
---
TYP
2
1.25
2.5
1.6
85
100
60
80
30
>15
68
MAX
---
---
---
---
---
---
---
---
---
---
---
UNIT
W
mW
m%
kHz
dB
--- 80 ---
--- 80 ---
--- 85 ---
See Table 2
--- 90 ---
--- 45 ---
dB
dB
dB
MΩ
dB
µV (rms)
Ver: 1.3
Sep 23, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
2


Part Number G1427
Description 2W Stereo Audio Amplifier
Maker Global Mixed-mode Technology
Total Page 16 Pages
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