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8002A / MD8002A 3W Mono Audio Amplifier IC SOP-8 – Pack of 5
8002A / MD8002A 3W Mono Audio Amplifier IC SOP-8 – Pack of 5
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8002A / MD8002A 3W Mono Audio Amplifier IC — SOP-8, 2V–5.5V, BTL Output (5-Pack)
The 8002A (also known as MD8002A) is a 3W mono Class AB audio power amplifier IC in a SOP-8 SMD package. With a BTL (Bridge-Tied Load) output configuration, it delivers up to 3W into a 4Ω speaker at 5V supply (1.5W at 4Ω/5V typical), with no external coupling capacitors required. Operating from 2V to 5.5V, it is the standard audio amplifier IC for portable Bluetooth speakers, Arduino audio projects, DY-SV17F voice modules, and compact audio systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOP-8 (SMD) |
| Output Power | 3W max (4Ω, 5V); 1.5W typ. (4Ω, 5V, 10% THD) |
| Output Configuration | BTL (Bridge-Tied Load, differential) |
| Supply Voltage | 2.0V – 5.5V |
| Quiescent Current | ~3mA (no signal) |
| THD+N | <0.2% (1W, 1kHz, 5V) |
| SNR | >80dB |
| Shutdown Pin | Yes (active-low, for power saving) |
| Operating Temperature | -40°C to +85°C |
| Quantity | 5 pieces |
8002A vs PAM8403 vs LM386 — Audio Amplifier Comparison
| Feature | 8002A / MD8002A | PAM8403 | LM386 |
|---|---|---|---|
| Output power | 3W mono (BTL) | 3W+3W stereo (Class D) | 0.5–1W mono |
| Class | Class AB | Class D | Class AB |
| Supply voltage | 2–5.5V | 2.5–5.5V | 4–12V |
| Efficiency | ~75% | ~90% | ~50% |
| Audio quality | Good (low THD) | Good (switching noise) | Moderate |
| Package | SOP-8 (SMD) | SOP-16 (SMD) | DIP-8 (through-hole) |
| Best for | Compact mono speaker, voice module | Stereo portable speaker | Simple mono amp, learning |
Why Choose 8002A / MD8002A?
- BTL output — no output coupling capacitor needed, direct speaker connection
- 2V minimum supply — works from a single Li-ion cell (3.7V) or two AA batteries (3V)
- Shutdown pin — pull low to mute and reduce quiescent current to <1μA for battery-powered devices
- SOP-8 compact — minimal external components (2 input caps + 2 bypass caps), small PCB footprint
- 5-pack value — sufficient for multiple audio module builds and repairs
Compatible With / Common Use Cases
- Arduino audio output: Amplify PWM audio from Arduino (with RC filter) to drive a small speaker
- DY-SV17F voice module: External amplifier for higher volume than DY-SV17F’s built-in 5W amp
- Bluetooth speaker: Mono speaker amplifier in compact Bluetooth audio receiver module
- Intercom / doorbell: Voice announcement amplifier for 3.3V–5V embedded systems
- Toy sound module: Compact audio amplifier for battery-powered toy sound effects
Frequently Asked Questions
Q: How do I connect 8002A to an Arduino for audio output?
A: Connect a 10kΩ potentiometer from Arduino audio output (PWM pin with RC filter) to 8002A IN+ pin. Connect IN− to GND via 10kΩ. Connect VDD to 5V, GND to GND, SD (shutdown) to VDD or MCU GPIO. Connect speaker between OUT+ and OUT− (BTL, no coupling cap needed). Add 100nF bypass capacitor from VDD to GND close to the IC.
Q: What speaker impedance works with 8002A?
A: 8002A is rated for 4Ω speakers (maximum power). 8Ω speakers also work but deliver half the power (1.5W at 5V into 8Ω vs 3W into 4Ω). Do not use speakers below 4Ω — lower impedance increases current beyond the IC’s rating and may trigger thermal shutdown.
Q: Can 8002A replace PAM8610 or TPA2005D1 in an existing design?
A: 8002A is functionally similar to TPA2005D1 (Texas Instruments) — both are 3W BTL mono amplifiers in SOP-8 with similar pinouts. Verify pin-by-pin compatibility before substituting. PAM8610 is a different topology (Class D, higher power) and is not a direct replacement for 8002A.
Package Contents
- 5× 8002A / MD8002A 3W Mono Audio Amplifier IC (SOP-8)
