STMicroelectronics TDA1910HS

Overview

TDA1910HS from STMicroelectronics is a 10W monolithic audio power amplifier in Multiwatt11 Horizontal package, designed for high-fidelity TV and Hi-Fi applications. It delivers 10W output at 24V/4Ω with ≤0.5% THD, features integrated muting, thermal shutdown at 110–125°C, and achieves 65% efficiency at 12W into 4Ω.

For engineers reviewing the TDA1910HS datasheet, TDA1910HS pinout, TDA1910HS application, or TDA1910HS equivalent, key selection criteria include guaranteed 10W DIN 45500 compliance, muting threshold control via Pin 11 (0–1.3V on / 1.9–4.7V off), low 1.5µV input noise (Rg=10kΩ), and thermal resistance of 3°C/W junction-to-case.

Technical Context

The TDA1910HS implements a quasi-complementary Class-AB output stage with internal bias stabilization and open-loop gain of 75dB. Its muting function operates by dynamically switching Pin 1 input impedance between ~10Ω (mute-on) and ~200kΩ (mute-off), enabling signal attenuation up to 60dB without external circuitry.

Thermal protection activates at case temperatures ≥110°C, reducing output current to limit junction temperature to ≤150°C. Supply voltage rejection is 60dB at 100Hz with 10kΩ source resistance, and small-signal bandwidth spans 10Hz–120kHz with closed-loop gain of 30dB (±0.5dB).

Key Specifications

Pinout & Package

The TDA1910HS uses the Multiwatt11 Horizontal (MULTIWATT® H) package - a 11-pin vertically mounted, horizontally leaded power package with integrated heatsink tab (Pin 7). Leads are short and coplanar for through-hole PCB assembly; thermal interface requires silicon grease but no electrical isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio power amplifier applications.

Compared with TDA2030A and LM1875, the TDA1910HS uniquely integrates muting control and thermal shutdown in a single-ended 24V supply configuration - eliminating external components while ensuring safe, click-free operation in consumer TV and monitor applications.

Availability

TDA1910HS is available at Aetrix Electronics and suitable for home television audio, Hi-Fi stereo modules, set-top box output stages, and public address monitors requiring stable component supply across extended production lifecycles.

Supply support for TDA1910HS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in analog, power, and automotive ICs with strong heritage in audio and protection technologies.

The TDA1910HS belongs to ST's legacy audio power amplifier product line - engineered specifically for cost-sensitive, high-reliability consumer audio applications operating from single 24V rails.

FAQ

What is the minimum supply voltage required for full 10W output?

The TDA1910HS requires ≥24V supply to deliver its rated 10W into 4Ω at ≤0.5% THD per DIN 45500. At 18V, maximum output drops to 6.5W. Operation down to 8V is permitted but yields only ~1W output - sufficient for standby audio monitoring but not full-power playback.

How does the muting function interact with the input signal path?

Muting works by changing the input impedance at Pin 1: when Pin 11 voltage is ≤1.3V, Pin 1 impedance collapses to ~10Ω, shunting the input signal to ground and achieving 60dB attenuation. When Pin 11 rises to ≥1.9V, Pin 1 impedance rises to ~200kΩ, restoring full signal transfer with <1.2dB insertion loss.

Can the TDA1910HS drive an 8Ω load at full rated power?

Yes - it delivers 7.5W into 8Ω at 24V with ≤0.5% THD (40–15kHz). This is 25% less than its 4Ω capability due to reduced current demand, but still exceeds typical 8Ω speaker RMS requirements for compact audio systems. Efficiency remains at 62% under this condition.

What heatsink thermal resistance is required for continuous 10W operation?

At 10W output and 24V supply, junction-to-case thermal resistance is 3°C/W. To maintain T_j ≤125°C at 25°C ambient, total thermal resistance (case-to-ambient) must be ≤10°C/W. With typical mounting resistance (~1°C/W), a heatsink of ≤9°C/W is required - achievable with a 100cm² aluminum finned heatsink.