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Small Constant current 20mA "Joule Thief"

It's not real Joule Thief. Rather step-up boost converter.

pnoxiPnoxi
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It's a small size (5x10mm) 20mA Step-Up CC LED Driver "Joule Thief" for LEDs.

Details:
Small size (5x10mm)
Fully assembled
The set current has a tolerance of +/- 3mA, depending on the input voltage, temperature, and component tolerance.
Output Voltage up to 15V (LEDs serial connection)
Maximum power dissipation 0.2W (25°C)! (Due to the small size of the PCB)
Automatic shutdown when voltage drops below 0.8-0.9V (No flashing)
No adjustment possible (voltage, current, frequency)
The switching frequency varies based on the input voltage. Approximately 300-500kHz.

PR4401:

  • 1x - PR4401
  • 1x - NRH2410T100MN
  • 1x - CC0603KRX7R7BB105

ZXLD381:

  • 1x - ZXLD381FHTA
  • 1x - WLPN242410M150PB
  • 1x - CC0603KRX7R7BB105

  • More detailed information

    Pnoxi • 06/23/2019 at 07:22 • 0 comments

    ZXLD381

    • Startup voltage: 0.9V
    • Maximum input voltage: 2.2V
    • 85% Efficiency

    PR4401

    • Startup voltage: 0.9-1V
    • Maximum input voltage: 2.0V
    • 80% Efficiency


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