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TS4962M_07 Datasheet, PDF (1/41 Pages) STMicroelectronics – 3W filter-free class D audio power amplifier | |||
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TS4962M
3W filter-free class D audio power amplifier
Features
â Operating from VCC = 2.4V to 5.5V
â Standby mode active low
â Output power: 3W into 4Ω and 1.75W into 8Ω
with 10% THD+N max and 5V power supply.
â Output power: 2.3W @5V or 0.75W @ 3.0V
into 4Ω with 1% THD+N max.
â Output power: 1.4W @5V or 0.45W @ 3.0V
into 8Ω with 1% THD+N max.
â Adjustable gain via external resistors
â Low current consumption 2mA @ 3V
â Efficiency: 88% typ.
â Signal to noise ratio: 85dB typ.
â PSRR: 63dB typ. @217Hz with 6dB gain
â PWM base frequency: 250kHz
â Low pop & click noise
â Thermal shutdown protection
â 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.
Pin connections
IN+
1/A1
GND
2/A2
OUT-
3/A3
VDD
4/B1
VDD
5/B2
GND
6/B3
IN-
STBY
OUT+
7/C1
8/C2
9/C3
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
Block diagram
C2 Stdby Internal
Bias
150k
B1
B2
Vcc
Out+
C3
C1 -
In-
In+ +
A1
PWM
Output
H
Bridge
150k
A3
Out-
Oscillator
GND
A2
B3
Applications
â Cellular phone
â PDA
â Notebook PC
January 2007
Rev 4
1/41
www.st.com
41
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