9 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

9.2 Typical Application

The fundamental concept of load sharing is to drive a load using two or more of the same operational amplifiers.

Each amplifier is driven by the same source. Figure 9-1 illustrates the schematic for this design. This concept

effectively reduces the current load of each amplifier by 1/N, where N is the number of amplifiers. For further

details on the design and performance of this circuit, see the Reference Design for Implementation of the Load

Sharing Concept for Large-Signal Applications.

R

50 W

LOAD

R

50 W

SOURCE

R

100 W

S1

R

100 W

S2

R

100 W

T1

R

100 W

T2

THS3091

U1

THS3091

U2

V-

V-

V-

V+

V+

V+

+

+

V

OUT

TL1

Characteristic

Impedance

50 W

V

15 V

1

V

15 V

-

2

R

1 kW

F

R

50 W

LOAD

R

250 W

G

R

50 W

SOURCE

R

50 W

S

R

50 W

T

THS3091

U3

V-

V+

V

OUT

TL2

Characteristic

Impedance

50 W

V

IN

V

IN

R

1 kW

F1

R

250 W

G1

R

1 kW

F2

R

250 W

G2

Figure 9-1. Reference THS3091 and THS3091 Load Sharing Test Configurations

9.2.1 Design Requirements

Use two THS3091 amplifiers in a parallel load-sharing circuit to improve distortion performance.

Table 9-1. Design Parameters

DESIGN PARAMETER

VALUE

VOPP

20 V

RLOAD

100 Ω

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THS3091, THS3095

SLOS423K – SEPTEMBER 2003 – REVISED APRIL 2023

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