Overview

The TDA2030 is a classic monolithic integrated circuit in a 5-pin Pentawatt package intended for use as a Class-AB audio power amplifier. Manufactured by STMicroelectronics, it delivers up to 14W of output power into a 4 Ω4\ \Omega load or 9\W9\W into an 8 Ω8\ \Omega load at a supply voltage of ±14V\pm 14\text{V} or +28V+28\text{V} single supply.

The chip incorporates short-circuit protection and an automatic thermal shutdown mechanism to protect against overheating. It is widely found in low-cost active multimedia speakers, home audio amplifiers, and standalone DIY audio breakout modules.

Quick reference

Supply Voltage (VS)12.0 V to 36.0 V DC (Single Supply) or ±6V\pm 6\text{V} to ±18V\pm 18\text{V} (Split Supply)
Output Power14W14\text{W} RMS into 4 Ω4\ \Omega (VS=±14V,THD=0.5%VS = \pm 14\text{V}, \text{THD} = 0.5\%)
Total Harmonic Distortion (THD)0.08%0.08\% typical (POUT=0.1…10W,f=1kHzP_{OUT} = 0.1 \dots 10\text{W}, f = 1\text{kHz})
Frequency Response20 Hz20\text{ Hz} to 140 kHz140\text{ kHz} (−3 dB-3\text{ dB})
Peak Output Current3.5 A3.5\text{ A} (internally limited)
Quiescent Current50 mA50\text{ mA} typical

Pin configuration (Pentawatt Package)

text
        ┌───┴───┐
      1 │  +IN  │ Non-inverting Input
      2 │  -IN  │ Inverting Input
      3 │  -VS  │ Negative Supply / Ground (Single Supply)
      4 │  OUT  │ Amplified Audio Output
      5 │  +VS  │ Positive Supply
        └───────┘
PinNameTypeDescription
1+INInputNon-inverting audio signal input
2-INInputInverting audio signal input (feedback network connection)
3-VSPowerNegative supply voltage pin (or GND in single-supply mode)
4OUTOutputAmplified audio output to speaker (via decoupling cap for single supply)
5+VSPowerPositive supply voltage pin (+12V to +36V DC)

Specifications

ParameterSymbolMinTypMaxUnitConditions
Supply Voltage RangeVSV_S12.028.036.0VSingle supply mode
Quiescent Drain CurrentIdI_d—5080mAVS=±14VV_S = \pm 14\text{V}
Output Power (4 Ω4\ \Omega)PoP_o1214—Wd=0.5%,f=1kHzd = 0.5\%, f = 1\text{kHz}
Output Power (8 Ω8\ \Omega)PoP_o89—Wd=0.5%,f=1kHzd = 0.5\%, f = 1\text{kHz}
Input ResistanceRiR_i0.55.0—MΩPin 1 / Pin 2
Thermal Shutdown TempTjT_j—145—°CJunction temperature

Typical Application Circuit (Single Supply 28V)

text
                       +28V Power Supply
                          │
                       [Pin 5: +VS]
                          │
  Audio In ───[1µF Cap]─┬─┤ [Pin 1: +IN]
                        │ │
                      [R_in] [Pin 4: OUT] ───[2000µF Cap]─── (+) [ 4Ω / 8Ω SPEAKER ] (-) ─── GND
                        │ │
                       GND┤ [Pin 2: -IN] ───[Feedback R/C Network]───┤
                          │                                           │
                       [Pin 3: -VS] ───────────────────────────────── GND

Common mistakes

  • Operating without a heatsink: The TDA2030 generates substantial heat when driving speakers at high volume. Running the IC without a heatsink attached to its metal tab will trigger thermal shutdown almost immediately or damage the device.
  • Forgetting output clamp diodes on legacy TDA2030: Unlike TDA2030A, the original TDA2030 requires external flyback/protection diodes (1N4001) connected between Output (Pin 4) and +VS/GND to protect the output transistors against inductive speaker kickback voltages.
  • Forgetting output AC coupling capacitor in single-supply mode: Pin 4 DC offset is half the supply voltage (VS/2V_S / 2). Connecting a speaker directly to Pin 4 in a single-supply configuration without a 1000 μF…2200 μF1000\ \mu\text{F} \dots 2200\ \mu\text{F} electrolytic capacitor will burn out the speaker.

Notes

  • TDA2030 vs TDA2030A: TDA2030A is a higher-voltage variant (VSV_S up to ±22V/44V\pm 22\text{V} / 44\text{V} single supply, output up to 18W) with internal clamping diodes.

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