TS4962M Datasheet, PDF (1/32 Pages) STMicroelectronics – 3W Filter - free Class D Audio Power Amplifier

TS4962M
3W Filter-free Class D Audio Power Amplifier
■ 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.
Pin connections
IN₊
1/A1
GND
2/A2
OUT_-
3/A3
V_DD
4/B1
V_DD
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
■ Cellular Phone
■ PDA
■ Notebook PC
Order Codes
Part Number
TS4962MEIJT
Temperature Range
-40, +85°C
Package
Lead-Free Flip-Chip
Packing
Tape & Reel
Marking
62
December 2005
Rev 3
1/32
www.st.com
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