Haixing Li, Xiubao Sui, Zheyi Yao, Qian Chen, Guohua Gu. Design of multi-channel LED constant current driver in radiometric calibration light source[J]. Infrared and Laser Engineering, 2022, 51(2): 20210902
- Infrared and Laser Engineering
- Vol. 51, Issue 2, 20210902 (2022)
Fig. 1. Relationship curves of LED’s luminous flux and forward working current
Fig. 2. Spectral curves of selected LED
Fig. 3. Structure diagram of integrating sphere
Fig. 4. Overall design block diagram
Fig. 5. Diagram of LED constant current driving circuit
Fig. 6. Simulation results
Fig. 7. Reference voltage source circuit
Fig. 8. Test platform of radiometric calibration light source
Fig. 9. Fitting curve of control voltage and operating current
Fig. 10. Stability of the output spectral
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Table 1. Theoretical value and experimental value of LED driving current
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