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January 2007 Rev 4 1/41
41
TS4962M
3W filter-free class D audio power amplifier
Features
Operating from V
CC
= 2.4V to 5.5V
Standby mode active low
Output power: 3W into 4Ω and 1.75W into 8Ω
with 10% THD+N max and 5V power supply.
Output power: 2.3W @5V or 0.75W @ 3.0V
into 4Ω with 1% THD+N max.
Output power: 1.4W @5V or 0.45W @ 3.0V
into 8Ω with 1% THD+N max.
Adjustable gain via external resistors
Low current consumption 2mA @ 3V
Efficiency: 88% typ.
Signal to noise ratio: 85dB typ.
PSRR: 63dB typ. @217Hz with 6dB gain
PWM base frequency: 250kHz
Low pop & click noise
Thermal shutdown protection
Available in flip-chip 9 x 300μm (Pb-free)
Description
The TS4962M is a differential Class-D BTL power
amplifier. It is able to drive up to 2.3W into a 4Ω
load and 1.4W into a 8Ω load at 5V. It achieves
outstanding efficiency (88%typ.) compared to
classical Class-AB audio amps.
The gain of the device can be controlled via two
external gain-setting resistors. Pop & click
reduction circuitry provides low on/off switch noise
while allowing the device to start within 5ms. A
standby function (active low) allows the reduction
of current consumption to 10nA typ.
Applications
Cellular phone
PDA
Notebook PC
Block diagram
In-
Stdby
In+
Out-
Out+
Vcc
C2
C1
A1
A2
A3
B1 B2
B3
C3
GND
Internal
Bias
PWM
Output
Bridge
H
Oscillator
150k
150k
+
-
300k
V
DD
1/A1
7/C1 8/C2 9/C3
4/B1
6/B3
2/A2 3/A3
5/B2
V
DD
IN
-
IN
+
GND
STBY
GND
OUT
+
OUT
-
V
DD
1/A1
7/C1 8/C2 9/C3
4/B1
6/B3
2/A2 3/A3
5/B2
V
DD
IN
-
IN
+
GND
STBY
GND
OUT
+
OUT
-
IN+: positive differential input
IN-: negative differential input
VDD: analog power supply
GND: power supply ground
STBY: standby pin (active low)
OUT+: positive differential output
OUT-: negative differential output
Pin connections
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TS4962MEIJT 数据手册

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