MD8002A Audio Amplifier

14 May 2020 - 0 Comments

MD8002A Audio Amplifier IC

MD8002A Audio Amplifier Pinout

The MD8002A is a mono bridged audio power amplifier capable of delivering 3W of continuous average power to 3Ω BTL load. This IC comes with features like thermal shutdown protection, unity-gain stability, external gain set, and supply voltage of this IC is 5V.

Pin Description of MD8002A

Pin Number	Pin Name	Description
1	SD	Shutdown Pin. Active high
2	BYP	Bypass Capacitor Pin
3	+IN	Positive input of the first Amplifier
4	-IN	Negative pin of the first amplifier
5	VO1	Negative Output
6	VDD	Positive Supply Pin
7	GND	Ground Pin
8	VO2	Positive Output

MD8002A Audio amplifier features and specifications

Supply Voltage: 2V to 6V
Output Power: 3W
Shutdown Current:
0.6µA (typ.)
Audio - Load Impedance: 3 Ohms
Improved PSRR at 217 Hz & 1 kHz: 60 dB
Available in SOP8 package

Note: Complete Technical Details can be found in the MD8002A datasheet linked at the end of this page.

Equivalent for MD8002A: LM4871, TDA2050

Alternatives Audio Amplifiers: LM386, AD620, IC6283, JRC45558

Where to use MD8002A

The MD8002A is a Class-AB audio power amplifier with a Shutdown mode feature. 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.

So if you are looking for a Dual Operational amplifier IC with high-gain and wide bandwidth for audio amplification, then this IC might be the right choice for you.

How to use MD8002A

An application circuit from the MD8002A datasheet is given below. As shown in the circuit, the MD8002A has two operational amplifiers internally, allowing for a few different amplifier configurations. The first amplifier's gain is externally configurable; the second amplifier is internally fixed in a unity-gain, inverting configuration.

MD8002A Audio Amplifier

The closed-loop gain of the first amplifier is set by selecting the ratio of Rf to Ri while the second amplifier's gain is fixed by the two internal 40kΩ resistors. The figure shows that the output of amplifier one serves as the input to amplifier two, which results in both amplifiers producing signals identical in magnitude, but 180° out of phase.