Datasheet > PA12_09

PA12_09

更新时间： 2024-11-21 05:59:27

品牌	Logo	应用领域
凌云 - CIRRUS		运算放大器
页数	文件大小	规格书
5页	196K
描述
Power Operational Amplifier

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PA12_09 数据手册

PA12 • PA12A

PP rr oo uu cc tt IInnnno vvaa t ii o nn FFr roomm

PA^d^d12, PA^o12A

PA12 • PA12A

Power Operational Amplifier

FEATURES

•ꢀLOWꢀTHERMALꢀRESISTANCEꢀ—ꢀ1.4°C/W

•ꢀCURRENTꢀFOLDOVERꢀPROTECTIONꢀ—ꢀNEW

•ꢀHIGHꢀTEMPERATUREꢀVERSIONꢀ—ꢀPA12H

•ꢀEXCELLENTꢀLINEARITYꢀ—ꢀClassꢀA/BꢀOutput

•ꢀWIDEꢀSUPPLYꢀRANGEꢀ—ꢀ±10Vꢀtoꢀ±50V

•ꢀHIGHꢀOUTPUTꢀCURRENTꢀ—ꢀUpꢀtoꢀ±15AꢀPeak

8-PINꢀTO-3

PACKAGEꢀSTYLEꢀCE

APPLICATIONS

POWERꢀRATING

•ꢀMOTOR,ꢀVALVEꢀANDꢀACTUATORꢀCONTROL

•ꢀMAGNETICꢀDEFLECTIONꢀCIRCUITSꢀUPꢀTOꢀ10A

•ꢀPOWERꢀTRANSDUCERSꢀUPꢀTOꢀ100kHz

•ꢀTEMPERATUREꢀCONTROLꢀUPꢀTOꢀ360W

•ꢀPROGRAMMABLEꢀPOWERꢀSUPPLIESꢀUPꢀTOꢀ90V

•ꢀAUDIOꢀAMPLIFIERSꢀUPꢀTOꢀ120WꢀRMS

Not all vendors use the same method to rate the power

handling capability of a Power OpAmp.Apex Precision Power

rates the internal dissipation, which is consistent with rating

methods used by transistor manufacturers and gives conser-

vative results. Rating delivered power is highly application

dependent and therefore can be misleading.For example, the

125WinternaldissipationratingofthePA12couldbeexpressed

as an output rating of 250W for audio (sine wave) or as 440W

if using a single ended DC load. Please note that all vendors

rate maximum power using an inﬁnite heatsink.

DESCRIPTION

The PA12 is a state of the art high voltage, very high output

current operational ampliﬁer designed to drive resistive, induc-

tiveandcapacitiveloads.Foroptimumlinearity,especiallyatlow

levels, the output stage is biased for classA/B operation using

athermistorcompensatedbase-emittervoltagemultipliercircuit.

Thesafeoperatingarea(SOA)canbeobservedforalloperating

conditions by selection of user programmable current limiting

resistors. For continuous operation under load, a heatsink of

proper rating is recommended.The PA12 is not recommended

for gains below –3 (inverting) or +4 (non-inverting).

THERMALꢀSTABILITY

Apex Precision Power has eliminated the tendency of class

A/B output stages toward thermal runaway and thus has vastly

increased ampliﬁer reliability. This feature, not found in most

other Power Op Amps, was pioneered by Apex Precision

Power in 1981 using thermistors which assure a negative

temperature coefficient in the quiescent current.The reliability

beneﬁts of this added circuitry far outweigh the slight increase

in component count.

This hybrid integrated circuit utilizes thick ﬁlm (cermet)

resistors, ceramic capacitors and semiconductor chips to

maximize reliability, minimize size and give top performance.

Ultrasonically bonded aluminum wires provide reliable inter-

connections at all operating temperatures. The 8-pin TO-3

package is hermetically sealed and electrically isolated. The

use of compressible isolation washers voids the warranty.

EXTERNALꢀCONNECTIONS

R_CL+

CL+

+V_S

OUT

OUTPUT

EQUIVALENTꢀSCHEMATIC

+IN

–IN

TOP VIEW

Q2A

R_CL-

Q2B

CL–

–V_S

F.O.

Q6B

Q6A

MAY 2009

APEX − PA12UREVS

PA12U

http://www.cirrus.com

12 3 4 5

中文翻译

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