Apex Microtechnology - PA164 and PA165 - 4A/10A PEAK, 220V Multi-Purpose Power Amplifier ICs

The PA164, PA165 are high density, multi-purpose power amplifier ICs that utilize a proprietary monolithic MOSFET technology and silicon design to deliver new benchmarks in performance and thermal management for single-chip power amplifiers. With a footprint measuring just 20mm x 20mm, these devices are capable of providing 1A (PA164) and 4A (PA165) output current continuously, and up to 4A (PA164) and 10A (PA165) PEAK on voltage supplies up to 220V, while dissipating up to 28W of internally generated power.

The PA164/PA165 uses separate supplies for the amplifier core and the output stage to help optimize overall power dissipation capabilities. Thermal efficiency is further enhanced by the QFP
style package that features a heat slug on top, allowing for the mounting of a single heatsink over a single IC or an “array” pattern of these devices.

Onboard protection for these devices includes a user-defined, temperature compensated current limit and a temperature sensor output. The addition of an output disable function and an over current flag simplify the implementation of robust failure protections on the system level.

Typical Applications Designers can maximize the real estate saving size advantage offered by the PA164/PA165 by using multiple devices in circuit designs with high power requirements. A wide range of target applications include adjustable voltage and current sources, test equipment, piezo electric positioning, electrostatic transducers, electrostatic deflection, and focusing for deformable mirrors.


Low cost, monolithic (single chip) design
High continuous output current – 1A/4A (PA164/PA165)
High PEAK output current – 4A/10A (PA164/PA165)
High supply voltage 220V
Internal power dissipation 28W
Temperature compensated current limit with over-current flag
Package - Surface mount with heat slug on top for efficient heat sinking of multiple devices


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Datasheet PA164

Datasheet PA165



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