Test of KW-VCCS1000 Voltage Controlled Constant Current Source Module and Calculation of Output Current Range
Module Introduction
KW-VCCS1000 adopts TI low-noise precision amplifier and high-speed high-power triode to achieve high-precision and high-current output of the module, and is compatible with the 12-24V power supply range. It can be used with DAC to realize laser, LED constant current drive and sensor excitation control.
Wiring diagram
module testing
Input DC Voltage Control
Test condition: 12V, load: 10Ω
| Input voltage V | Output current A |
|---|---|
| 0 | 0.096 |
| 1 | 0.096 |
| 2 | 0.193 |
| 3 | 0.289 |
| 4 | 0.395 |
| 5 | 0.491 |
| 6 | 0.587 |
| 7 | 0.685 |
| 8 | 0.782 |
| 9 | 0.880 |
| 10 | 0.987 |
It is recommended to use a pure resistance load for the load, so that the error is relatively small; if it is an electronic load, it is better to use the constant resistance mode;
Graphics test
1. Test conditions: 12V power supply, 10KHz, 5Vpp square wave, load: 10 ohms, the
bias adjustment is to output a positive waveform; the control input cannot be connected to a negative one, otherwise the measured waveform is inaccurate
2. Test conditions: 12V Power supply, 10KHz, 2.5Vpp square wave, load: 10 ohms,
Calculation of the output current range
Calculation formula: R8/(R2+R8) = the corresponding maximum current/1A;
the resistance of the module itself is R2=10Ω, R8=100K; input 0-10V, the range at this time is 1A;
if: change to input 0-10V, the corresponding output is 0-0.1A;
then R2 and R8 are replaced with 90K and 10K respectively (the two should be around 100K when added);
Summarize
The specific test results are subject to the actual measurement, and the error will be different in different test environments. This test data is only for reference;