Hello. I need WP charger for Li-ion battery. Charge current have to be 20-50mA, It can vary.
So, Can I apply LTC4120 for batteries charge current is near 20mA?
A pole in the control loop is created with resistor RPROG and stray capacitance at the PROG pin. You should have no problem at 50mA; however at 20mA, RPROG=60.6kΩ, and this may be high enough to reduce the phase margin of the control loop. This means the control loop should be stable, but there may be more ringing in the output current when the charging current or input voltage is changed suddenly. With small stray capacitance at the PROG pin, you will probably be OK, but you will have to try it to be sure. Apply a voltage step to the input, and check the output voltage and current to make sure the response has little or no ringing.
Ok. Thanks a lot. I will try
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