Document
Global Mixed-mode Technology Inc.
G1431
2W Stereo Audio Amplifier
Features
Internal Gain Control, Which Eliminates External 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) Supported Fully differential Input Shutdown Control Available www.DataSheet4U.com Surface-Mount Power Package 20-Pin TSSOP-P & 20-Pin TQFN 4X4
General Description
G1431 is a stereo audio power amplifier in 20pin TSSOP thermal pad package or 20-pin TQFN 4X4. It can drive 2W continuous 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 and to enlarge the driving power, G1431 supports the Bridge-Tied Load (BTL) mode for driving the speakers. For the low current consumption applications, the SHDN mode is supported to disable G1431 when it is idle. The current consumption can be reduced to 150µA (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.
Applications
Stereo Power Amplifiers for Notebooks or Desktop Computers Multimedia Monitors Stereo Power Amplifiers for Portable Audio Systems
Ordering Information
ORDER MARKING NUMBER
G1431F2U G1431R9U G1431 1431
TEMP. RANGE
PACKAGE (Pb free)
-40°C to +85°C TSSOP-20 (FD) -40°C to +85°C TQFN4X4-20 R9:TQFN4X4-20
Note: F2: TSSOP-20 (FD) U: Tape & Reel
Pin Configuration
ROUT+
ROUT-
PVDD
RIN-
VDD
G1431
GND GAIN0 GAIN1 10 9 NC GND GND BYPASS LIN+ LOUT+ LINPVDD RIN+ LOUTLIN+ 1 2 3 4 5 6 7 8 9 20 19 18 17 GND SHUTDOWN ROUT+ RINVDD PVDD ROUTGND NC GND
13
14
12
SHUTDOWN GND GND GAIN0 GAIN1
16 17 18 19 20 1 2 3 4 5 Thermal Pad
15
11
8 7 6
Thermal Pad
16 15 14 13 12 11
BYPASS 10
LOUT+
LOUT-
RIN+
LIN-
Top View TSSOP-20 (FD)
G1431 TQFN4X4-20
PVDD
Ver: 1.5 Oct 25, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
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
G1431
Power Dissipation (1) TA ≤ 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7W TA ≤ 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7W Electrostatic Discharge, VESD Human body mode . . . . . . . . . . . . . . . . . . . . . 3000V(2)
Note:
(1) (2)
: Recommended PCB Layout : Human body model : C = 100pF, R = 1500Ω, 3 positive pulses plus 3 negative pulses
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Electrical Characteristics
DC Electrical Characteristics, TA=+25°C PARAME.