DC-DC 1.4-24V 3A LTC4002 Charging Power Module than MAX1879 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