P r o d u c t I n n o v a t i o n F r o m

PB51

PB51U

1

FEATURES

•WIDESUPPLYRANGE—±15Vto±150V

•HIGHOUTPUTCURRENT—

1.5AContinuous(PB51),2.0AContinuous(PB51A)

•VOLTAGEANDCURRENTGAIN

•HIGHSLEW—

50V/µsMinimum(PB51)

75V/µsMinimum(PB51A)

•PROGRAMMABLEOUTPUTCURRENTLIMIT

•HIGHPOWERBANDWIDTH—320kHzMinimum

•LOWQUIESCENTCURRENT—12mATypical

•EVALUATIONKIT—EK29

APPLICATIONS

•HIGHVOLTAGEINSTRUMENTATION

•ELECTROSTATICTRANSDUCERS&DEFLECTION

•PROGRAMMABLEPOWERSUPPLIESUPTO280VP-P

DESCRIPTION

The PB51 is a high voltage, high current amplifier designed

to provide voltage and current gain for a small signal, general

purpose op amp. Including the power booster within the feed-

back loop of the driver amplifier results in a composite amplifier

with the accuracy of the driver and the extended output voltage

range and current capability of the booster.The PB51 can also

be used without a driver in some applications, requiring only

an external current limit resistor to function properly.

The output stage utilizes complementary MOSFETs, pro-

viding symmetrical output impedance and eliminating second

breakdown limitations imposed by Bipolar Transistors. Internal

feedback and gainset resistors are provided for a pin-strapable

gain of 3.Additional gain can be achieved with a single external

resistor. Compensation is not required for most driver/gain

configurations, but can be accomplished with a single external

capacitor. Enormous flexibility is provided through the choice

of driver amplifier, current limit, supply voltage, voltage gain,

and compensation.

This hybrid circuit utilizes a beryllia (BeO) substrate, thick

film 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 12-pin Power

SIP package is electrically isolated.

TYPICALAPPLICATION

EQUIVALENTSCHEMATIC

EXTERNALCONNECTIONS

OP

AMP

PB51

C

F

R

F

V

IN

R

I

+15V

–15V

IN

COM

+Vs

–Vs

R

CL

OUT

C

C

R

G

R

L

Q1

Q4

Q2

3

Q

Q5

Q6

Q7

8

12

9

11

5

2

6

1

Q8

Q10

Q9

Q11

3.1K

IN

COM

CC

GAIN

ILIM

OUT

1

2

3

4

5

6

7

8

9

10

IN

COM

NC

NC

11

12

C

C

R

G

R

CL

NC

NC

OUT

+V

S

-V

S

12-PINSIP

PACKAGESTYLEDP

Formed leads available. See package styles ED & EE

Power Booster Amplifier

PB51

P r o d u c t I n n o v a t i o n F r o m

Copyright © Cirrus Logic, Inc. 2009

(All Rights Reserved)

http://www.cirrus.com

JUN 2009

APEX − PB51UREVE