Secondary Side, Off-line Battery Charger Controllers - Analog Devices

The ADP3810 and ADP3811 combine a programmable current limit with a battery voltage limit to provide a constant current, constant voltage Battery Charger controller. In secondary side, off-line applications, the output directly drives the Diode side of an Optocoupler to give isolated feedback control of a primary side PWM. The circuitry includes two gain (gm) stages, a preci- sion 2.0 V reference, a control input Buffer an Undervoltage Lock Out (UVLO) Comparator an output Buffer and an over- voltage Comparator The current limit Amplifier senses the voltage drop across an external sense resistor to control the average current for charg- ing a battery. The voltage drop CAN be adjusted from 25 mV to 300 mV, giving a charging current limit from 100 mA to 1.2 amps with a 0.25 sense resistor. An external dc voltage on the VCTRL input sets the voltage drop. Because this input is high impedance, a filtered PWM output CAN be used to set the voltage. As the battery voltage approaches its voltage limit, the voltage sense Amplifier takes over to maintain a constant battery volt- age. The two Amplifiers essentially operate in an OR fash- ion. Either the current is limited, or the voltage is limited. The ADP3810 has internal thin-film resistors that are trimmed to provide a precise final voltage for LiIon batteries. Four volt- age options are available, corresponding to 1-4 LiIon cells as follows: 4.2 V, 8.4 V, 12.6 V and 16.8 V. The ADP3811 omits these resistors allowing any battery volt- age to be programmed with external resistors By Analog Devices, Inc.
ADP3811 's PackagesADP3811 's pdf datasheet
ADP3810AR-4.2 SO
ADP3810AR-8.4 SO
ADP3810AR-12.6 SO
ADP3810AR-16.8 SO

ADP3811 Pinout, Pinouts
ADP3811 pinout,Pin out
This is one package pinout of ADP3811,If you need more pinouts please download ADP3811's pdf datasheet.

ADP3811 Application circuits
ADP3811 circuits
This is one application circuit of ADP3811,If you need more circuits,please download ADP3811's pdf datasheet.

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