High-side V-I with bipolar junction transistor (BJT) circuit




This low-side voltage-to-current (V-I) converter delivers a well-regulated current to a load which can be connected to a voltage greater than the op amp supply voltage. The circuit accepts an input voltage from 0 V to 10 V and converts it to a current from 0 A and 1 A. The current is accurately regulated by feeding back the voltage drop across a low-side current-sense resistor (R5) to the op amp.
  • Input:
    • Vi = 0 V to 10 V
    • Iimax = 200 µA
  • Output: Io = 0 A to 1 A
  • Supply:
    • Vcc = 15 V
    • Vee = 0 V
    • Vload = 36 V
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TINA-TI Reference Design Companion for Voltage-to-Current Converter Circuit BJT SBOMB58.TSC (245KB)

Supported products & hardware

Supported products & hardware

General-purpose op amps
TLV9102 Dual, 16-V, 1.1-MHz, low-power operational amplifier TLV9152 Dual, 16-V, 4.5-MHz, low-power operational amplifier

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Type Title Date
* Circuit design Voltage-to-current (V-I) converter circuit with BJT PDF | HTML 14 May 2021
Application note AN-31 Amplifier Circuit Collection (Rev. D) 21 Oct 2020

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