Battery charging and backup

Here is a list of parts to consider.  All will accept a 12V input and charge 2S Li-ion battery.  All are controllers for switchmode battery charger applications.

LTC4002-8.4

LTC4015 - includes I2C telemetry, ideal-diode-based power path

LTC4020 - includes ideal-diode-based power path

LTC4110 - includes ideal-diode-based power path

LTC4121

  This is my block diagram with ltc4002. The charging current is set 250ma. On "No load", the ltc charges the battery and there is no heat dissipation. On load , the ltc4002 heat increases drastically. im confused about its behaviuor. Could you help me resolve this

Hi Mano,

LTC4002 is a switch-mode battery charger. Heating up at no load can mean many things. It would have helped if you started with a working demo board like what we have available and modify parts from there.  PCB layout can be a source of error too. Isolate first the LTC4002 and make it work at different load conditions.

Hi Mano,

LTC4002 is a switch-mode battery charger. Heating up at no load can mean many things. It would have helped if you started with a working demo board like what we have available and modify parts from there.  PCB layout can be a source of error too. Isolate first the LTC4002 and make it work at different load conditions.