PA13(2008) 查看數據表（PDF） - Cirrus Logic

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PA13
(Rev.:2008)

Power Operational Amplifier

Cirrus Logic 

PA13 • PA13A

Product Innovation From

4. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS

to –VS.

5. Rating applies if the output current alternates between both output transistors at a rate faster than

60Hz.

6. Full temperature range specifications are guaranteed but not 100% tested.

POWER RATING

TYPICAL APPLICATION

Not all vendors use the same method to rate the power han-

7

dling capability of a Power Op Amp. APEX rates the internal

dissipation, which is consistent with rating methods used by

transistor manufacturers and gives conservative results. Rat-

ing delivered power is highly application dependent and there-

fore can be misleading. For example, the 135W internal dis-

sipation rating of the PA13 could be expressed as an output

rating of 260W for audio (sine wave) or as 440W if using a

single ended DC load. Please note that all vendors rate maxi-

mum power using an infinite heatsink.

THERMAL STABILITY

APEX has eliminated the tendency of class A/B output stages

toward thermal runaway and thus has vastly increased am-

plifier reliability. This feature, not found in most other Power

Op Amps, was pioneered by APEX in 1981 using thermistors

which assure a negative temperature coefficient in the quies-

cent current. The reliability benefits of this added circuitry far

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