TS4962_10 Datasheet, PDF (1/44 Pages) STMicroelectronics – 2.8 W filter-free mono class D audio power amplifier

TS4962
2.8 W filter-free mono class D audio power amplifier
Features
■ Operating from V_CC = 2.4 V to 5.5 V
■ Standby mode active low
■ Output power: 2.8 W into 4 Ω and 1.7 W into
8 Ω with 10% THD+N maximum and 5 V power
supply
■ Output power: 2.2 W at 5 V or 0.7 W at 3.0 V
into 4 Ω with 1% THD+N maximum
■ Output power: 1.4 W at 5 V or 0.5 W at 3.0 V
into 8 Ω with 1% THD+N maximum
■ Adjustable gain via external resistors
■ Low current consumption 2 mA at 3 V
■ Efficiency: 88% typical
■ Signal to noise ratio: 85 dB typical
■ PSRR: 63 dB typical at 217 Hz with 6 dB gain
■ PWM base frequency: 280 kHz
■ Low pop & click noise
■ Thermal shutdown protection
■ Available in DFN8 3 x 3 mm package
Applications
■ Cellular phones
■ PDAs
■ Notebook PCs
Description
The TS4962 is a differential class-D BTL power
amplifier. It can drive up to 2.2 W into a 4 Ω load
and 1.4 W into an 8 Ω load at 5 V. It achieves
outstanding efficiency (88% typ.) compared to
standard AB-class audio amps.
DFN8 3 x 3 mm
TS4962IQT pinout
1
8
2
EXPOSED
7
3
PAD
6
4
5
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 5 ms. A
standby function (active low) enables the current
consumption to be reduced to 10 nA typical.
January 2010
Doc ID 10968 Rev 8
1/44
www.st.com
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