Kindly suggest me a part similar to LTC4091 which can act as backup switch and charging LI-Ion 7.4v Battery
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.
LTC4015 - includes I2C telemetry…
LTC4015 - includes I2C telemetry, ideal-diode-based power path
LTC4020 - includes ideal-diode-based power path
LTC4110 - includes ideal-diode-based power path
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
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.