Apex Microtechnology Introduces the PA34 and PA35 Power Amplifiers

Apex Microtechnology Corp. introduced the new PA34 and PA35 monolithic 1.7A power amplifier that is configured with a voltage follower, enabling it to generate up to 3.4A output current.

Housed in a very small, industry-standard TO-220 package, the device operates via 5V to 40V single supply, and ±2.5V to ±20V split supplies. The power amplifier features an extended common-mode range that includes the negative rail (ground), which facilitates single supply applications.

The PA34 amplifier provides the same monolithic die as the PA35 in a TO-220 package. This device is internally configured as a 2.5A power amplifier with current sense and VBOOST. The latter features are not available in the PA35 due to pin constraints.

Both the PA34 and PA35 offer high efficiency, resulting from a high-output swing that drives within 2.8V and 1.4V of supply, respectively. Both operate off total supply voltages as low as 5V, making them suitable for employment as high-current drivers for single-supply, 12V and 28V motor applications. The two devices also feature internal current-limit circuitry for protection on the output stage.