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8002 (ETC) : Total 6 Pages

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2.0 Watt Audio Power Amplifier
Features
Improved PSRR at 217 Hz & 1 KHz
60 dB
Power output at 5.0V, 10% THD+N, 42.0 W (typ.)
Power output at 5.0V, 1% THD+N, 81.5 W (typ.)
2.2V – 5.5V operation
Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions
No output coupling capacitors, snubber networks or bootstrap capacitors required
Unity-gain stable
External gain configuration capability
Packages: SOP8
General Description
The 8002 is a Class-AB audio power amplifier. It is capable of delivering 2.0 watts of
continuous average power to an 4BTL load with less than 10% distortion (THD+N) from a
5VDC power supply, or 1.5 watts continuous average power to an 8 BTL load with less than
1% distortion.
The 8002 is designed specifically to provide high quality output power with a minimal
amount of external components. It does not require output coupling capacitors or bootstrap
capacitors. The 8002 is ideally suited for audio speakers and other low voltage applications.
With special pop-click eliminating circuit, the 8002 provides perfect pop-click characteristic
during turn-on and turn-off transitions.
The 8002 is unity-gain stable and can be configured by external gain-setting resistors.
Applications
Audio speakers
Desktop computers
Low voltage audio systems
Pin Diagrams
-1-
V1.0



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Pin Description
No. Pin Name
1 SHD
2 BP
3 INP
4 INN
5 Vout1
6 VDD
7 GND
8 Vout2
I/O Description
I Shut-down Logical Control, ‘1’ is active.
I/O Analog ground for inner OPAs. It’s about a half of VDD.
I Positive Input
I Negative Input
O Negative BTL Output
I/O Power Supply (2.2 – 5.5 V)
I/O Ground
O Positive BTL Output
- 2 - V1.0



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Typical Application Circuit
FIGURE 1. 8002 Typical Application Circuit
FIGURE 2. 8002 Differential Amplifier Configuration
-3-
V1.0



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External Components Description
Components
Ri
Ci
Rf
Cs
Cb
Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with
Rf. This resistor also forms a high pass filter with Ci at fc = 1/(2πRi*Ci).
Input coupling capacitor which blocks the DC voltage at the amplifiers input
terminates. Also creates a high-pass filter with Ri at fc = 1/(2πRi*Ci).
Feedback resistance which sets the closed-loop gain in conjunction with Ri. The
gain is AVD=2*(Rf/Ri).
Supply bypass capacitor which provides power supply filtering.
Bypass pin capacitor which provides half-supply filtering. Refer to the section.
Absolute Maximum Ratings
Supply Voltage
-0.3V to 6V
Input Voltage
-0.3V to VDD+0.3V
Power Dissipation
See Dissipation Rating Table
Junction Temperature -40to +150
Storage Temperature -65to +150
Thermal Resistance
θJC(MSOP8)
θJA(MSOP8)
θJA(SOP8)
56/W
190/W
184/W
Operating Ratings
Temperature Range
-40℃≦TA≦85℃
Supply Voltage
2.2V≦VDD≦5.5V
NOTE: Absolute Maximum Ratings indicate limits
beond which damage to the device may occur.
Operating Rating indicate conditions for which the
device is functional, but do not guarantee specific
performance limits.
Electrical Characteristics
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified.
Limits apply for TA = 25.
VDD = 5V
Symbol
Parameter
Conditions
Min.
VIN = 0V, 8Load
IDD Quiescent Power Supply Current
VIN = 0V, No Load
ISD Shutdown Current
VIN=0V, VSHD=GND, No Load
Spec
Typ. Max.
3.0 8
2.5 7
0.5
Units
mA
mA
uA
- 4 - V1.0






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