DC-DC 1.4-24V 3A LTC4002 Charging Power Module than MAX1879 QS-12L4.2-2A

SKU: 1941757

6.58 6.58 Piece 6.58 USD

¥ 48.00

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Brand: QSKJ

Model: QS-12L4.2-2A

The LTC4002 is DC 4.7-24V to 4.V switching regulator, widte pressure, has undervoltage protection, conversion efficiency up to 90%, it very suitable for Lithium battery.


  • Input Voltage :4.7-24V (when the input voltage exceeds 12V, output current 2A, please enhance heat sink)

  • Charge voltage: 4.2V

  • Charge voltage accuracy: ± 1%

  • Suitable for battery: 3.6V 3.7V Lithium Battery 500mAh ~ 15000mAh

  • Charging current: 2A

  • Charge current accuracy: ± 5%

  • Charging indication: when charging, Blue LED bright; when full charge, Blue LED off ( recommend charge one more hour when the Blue LED turn off )

  • Battery anti-reflux: NONE ( please Series an Diode (SK34,SK54,SS34 etc.) at the input voltage Postive )

  • Conversion efficiency: Max 90% (5V input)

  • 12V input efficiency is about 85%

  • 24V input efficiency is about 80%

  • Switching frequency: 500kHZ

  • Input voltage under-voltage protection: 4.2V (TYP)

  • Battery intrusion Current: 10uA (without battery polarity protection)

  • Operating temperature: Industrial (-40 ° C to +85 ° C)

  • Full load temperature rise: 30 ° C

  • Reverse battery protection: No


  • DIY a lithium battery charger. power adapter (DC4.7-24V) to charge lithium battery.

  • Fast lithium battery charger, 2A can charge lithium battery faster.

  • Some Industrial applications

  • Solar panels to charge lithium batteries