Design Goals
Input | Output | Supply | |||||
---|---|---|---|---|---|---|---|
ViMin | ViMax | IiMax | IoMin | IoMax | Vcc | Vee | Vload |
0V | 10V | 200µA | 0A | 1A | 15V | 0V | 36V |
Design Description
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 0V to 10V and converts it to a current from 0A and 1A. The current is accurately regulated by feeding back the voltage drop across a low-side current-sense resistor (R5) to the op amp.
Design Notes
Design Steps
The transfer function of the circuit is:
Design Simulations
DC Simulation Results
AC Simulation Results
Transient Simulation Results
Design References
Design Featured Op Amp
TLV9102 | |
---|---|
Vss | ±1.35V to ±8V, 2.7V to 16V |
VinCM | Rail-to-rail |
Vout | Rail-to-rail |
Vos | 0.3mV |
Iq | 120µA |
Ib | 10pA |
UGBW | 1.1MHz |
SR | 4.5V/µs |
#Channels | 1, 2, 4 |
www.ti.com/product/TLV9102 |
Design Alternate Op Amp
TLV9152 | |
---|---|
Vss | ±1.35V to ±8V, 2.7V to 16V |
VinCM | Rail-to-rail |
Vout | Rail-to-rail |
Vos | 125µV |
Iq | 560µA |
Ib | 10pA |
UGBW | 4.5MHz |
SR | 20V/µs |
#Channels | 1, 2, 4 |
www.ti.com/product/TLV9152 |
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