R1
R2
1kΩ
4kΩ
V+
4kΩ
1kΩ
G = 1 +
= 5(1)
0.25Ω
800Ω
OPA548
ILIM
V–
VIN
VO
IO = 10A (peak)(2)
V+
800Ω
0.25Ω
OPA548
ILIM
V–
R3
R4
1kΩ
4kΩ
NOTES: (1) Works well for G < 10. Input offset causes output current to flow between amplifiers
with G > 10. Gains (resistor ratios) of the two amplifiers should be carefully matched to ensure
equal current sharing. (2) As configured (ILIM connected to V–) output current limit is set to 10A
(peak). Each amplifier is limited to 5A (peak). Other current limit values may be obtained, see
Figure 3, “Adjustable Current Limit”.
FIGURE 21. Parallel Output for Increased Output Current.
OPA548
16
SBOS070B
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