High Density Power Amplifier IC Delivers New Levels of Performance

High Density Power Amplifier IC Delivers New Levels of Performance

The PA164 and PA165 from Apex Microtechnology establish new benchmarks for power amplifier performance in a single chip design. By driving advances in packaging technology and utilizing Apex’s proprietary MOSFET silicon design, the PA164 and PA165 can deliver enhanced amplifier features and combinations of continuous and PEAK output current currently not available in an IC form factor that is also rated to operate on voltage supplies up to 220 volts.

The PA164 provides 1 amp continuous and 4 amps PEAK of output current, while the PA165 can deliver 10 amps PEAK. At these levels of performance, thermal management for a very compact package must be managed very carefully. The design of this IC utilizes separate supplies for the amplifier core and the output stage to help optimize the overall power dissipation capabilities. In addition, both devices are housed in an QFP style package with a heat slug on top to facilitate for mounting of a heat sink over a single device or on an “arrow” pattern of these devices. As a result, the devices are capable of dissipating up to 28 watts.

“With the increased in miniaturization of circuitry designs, board space has become a highly valuable commodity. The exceptional performance potential for these ICs make them an attractive solution across a wide number of potential applications requiring high power across multiple channels when board real estate is very tight,” explains Apex Strategic Marketing Director Jens Eltze. “Both the PA164 and PA165 can offer designers the opportunity to reduce the size of their overall circuity while saving valuable design time in achieving a final layout.”

Depending on the circuit design of the end system, external components can be used to set both the optimum gain and the bandwidth. Onboard system 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 protection on the system level.

The wide range of target applications include adjustable voltage and current sources, test equipment, piezo electric positioning, electrostatic transducers and deflection, and focusing for deformable mirrors.

In terms of electrical performance comparisons to other high performance power amplifiers, the table below stacks up the PA164 and PA165 to Apex’s own next highest rated IC -- the PA441.

 

SPECIFICATION PARAMETER

PA164

PA165

PA441

Output current continuous

1A

4A

60mA

Output current PEAK

4A

10A

120mA

Supply voltage operation

220V

220V

350V

Internal power dissipation

28W

28W

12W

Onboard over current protection

Yes

Yes

Yes

Overcurrent flag and output disable

Yes

Yes

No

Built-in temperature sensor

Yes

Yes

No

Power Bandwidth

55kHz

55kHz

35kHz

RoHS compliant

Yes

Yes

Yes

Package style

QFP style, heat slug on top (hermitically sealed package as option)

QFP style, heat slug on top (hermitically sealed package as option)

Plastic, surface-mount PSOP with heat slug – or – plastic, thru-hole, hermetic PIP with alumina ceramic substrate

Package footprint measurement

20mm x 20mm

20mm x 20mm

16mm x 14.8mm – PSOP

25.4mm x 4.72mm – PIP

Pricing, Availability and Evaluation Tools

Sample units of the PA164 and PA165 are available now for qualified applications, with production volumes targeted for Q1 2018. Per unit pricing for 1K product quantities will be sub $30.00 USD. An evaluation kit for rapid prototyping is scheduled to be available in early Q4 2017.

More information: Apex Microtechnology