AXP202 datasheet(17/48 Pages) ETC2

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Single Cell Li-Battery PWM Charger and Power System Management IC

AXP202

If Li-battery is available, it will “Seamlessly”switch to Li-battery once external power is removed

When both VBUS and ACIN are available, ACIN will be applied to supply power in priority, and

Li-battery will be charged.

If ACIN drive capability is not enough, VBUS will be enabled to achieve ACIN/VBUS common

power supply.

If the drive capacity is still insufficient, charge current will be reduced to zero, and battery is

used for power supply.

Therefore, compatibility of the system with external powers of different drive ability can be

dramatically improved, and no special customized adapters are required to be provided on the part

of manufacturers.

Please refer to the following diagram.

As shown above, when ACIN provides insufficient load ability, IPSOUT voltage will fall, and BAT

will change from charge to discharge to supply load current together with ACIN.

Host can set IPS parameters and read the feedback by visiting internal registers in AXP202 via

TWSI.

Voltage-Limit/ Current-Limit Mode and Direct Mode

AXP202 Datasheet(PDF) 17 Page - List of Unclassifed Manufacturers