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High Efficiency Low-cost 0.5 A/33 V LED Driver Module

High Efficiency Low-cost 0.5 A/33 V LED Driver Module
High Efficiency Low-cost 0.5 A/33 V LED Driver Module
Here we outline the component selection and some design criteria for a simple constant-current driver module with fast PWM input, suitable for driving middle and high power LEDs, and operating from 8 up to 33 V with output current configurable in steps from 0.1 up to 0.5 A.

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Materials

Extra info / Update

Specification:
Topology: Buck
Regulation: Hysteretic
Input voltage: 8–33 VDC
Output current: 100–500 mA
Switching frequency: 1 MHz max
Current ratio: 0.13 Ohm A–1
Dimensions: 16 x 16 x 5.5 mm (0.63 x 0.63 x0.22 in)
Weight: 1.6 g
Thermal shutdown
Current protection
Dimming: PWM up to 20 kHz

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