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TA2020-020 Datasheet(PDF) 4 Page - Tripath Technology Inc.

Part No. TA2020-020
Description  Stereo 20W (4Ω) Class-T Digital Audio Amplifier using Digital Power Processing Technology
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Manufacturer  TRIPATH [Tripath Technology Inc.]
Direct Link  http://www.etelos.com/
Logo TRIPATH - Tripath Technology Inc.

TA2020-020 Datasheet(HTML) 4 Page - Tripath Technology Inc.

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TECHNICAL INFORMATION
4 of 13
TA2020-020, Rev. 4.0, 09.00
Pin Description
Pin
Function
Description
2, 8
V5D, V5A
Digital 5VDC, Analog 5VDC
3, 7,
16
AGND1, AGND2,
AGND3
Analog Ground
4
REF
Internal reference voltage; approximately 1.0VDC
6
OVERLOADB
A logic low output indicates the input signal has overloaded the amplifier.
9, 12
VP1, VP2
Input stage output pins
10, 13
IN1, IN2
Single-ended inputs. Inputs are a “virtual” ground of an inverting opamp with
approximately 2.4VDC bias.
11
MUTE
When set to logic high, both amplifiers are muted and in idle mode. When low
(grounded), both amplifiers are fully operational. If left floating, the device stays in
the mute mode. Ground if not used.
14
BIASCAP
Input stage bias voltage (approximately 2.4VDC).
17
SLEEP
When set to logic high, device goes into low power mode. If not used this pin
should be grounded.
18
FAULT
A logic high output indicates thermal overload, or an output is shorted to ground,
or another output.
19, 28
PGND2, PGND1
Power Ground (high current)
20
DGND
Digital Ground
21, 23,
26, 24
OUTP2 & OUTM2;
OUTP1 & OUTM1
Bridged outputs
22, 25
VDD2, VDD1
Supply pin for high current H-bridges, nominally 13.5VDC.
1, 5, 15
NC
Not connected
27
VDDA
Analog 13.5VDC
29
CPUMP
Charge pump output (nominally 10V above VDDA)
30
5VGEN
Regulated 5VDC source used to supply power to the input section (pins 2 & 8).
31, 32
DCAP2, DCAP1
Charge pump switching pins. DCAP1 (pin 32) is a free running 300kHz square
wave between VDDA and DGND (13.5Vpp nominal). DCAP2 (pin 31) is level
shifted 10 volts above DCAP1 (pin 32) with the same amplitude (13.5Vpp
nominal), frequency, and phase as DCAP1.
5VGEN
NC
FAULT
PGND2
DGND
OUTP2
VDD2
OUTM2
OUTM1
VDD1
OUTP1
NC
VDDA
PGND1
CPUMP
DCAP2
AGND3
BIASCAP
IN2
VP2
MUTE
IN1
VP1
V5A
AGND2
OVERLOADB
REF
AGND1
V5D
DCAP1
30
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
15
14
13
11
10
12
9
8
7
6
5
4
3
2
32-pin SSIP Package
(Front View)
32
31
SLEEP
NC
B


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