APL3201 データシートの表示（PDF） - Anpec Electronics

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APL3201

Li+ Battery Charger with Thermal Regulation

Anpec Electronics 

APL3201

Function Description (Cont.)

Charge Status Outputs

The open-drain STAT1 and STAT2 outputs indicate four

charger operations are shown in Table 1. The two out-

puts can be used to drive LEDs or communicate to the

host processor. Note that OFF indicates the open-drain

transistor is turned off.

Disable Charging for V >6.4V

IN

When input voltage is over 6.4V overvoltage threshold,

the charging of APL3201 will be turned off. The charging

will be turned on until the input voltage is below the OVP

threshold. The absolute maximum rating of input voltage

is 7V. If the input voltage is over 7V the IC may be damaged.

CHARGE STATE

Precharge in progress

Fast charge in progress

Charge done

Charge suspended

STAT1

ON

ON

OFF

OFF

STAT2

ON

OFF

ON

OFF

Table 1. Status Pin Summary

Soft-Start

The APL3201 includes a soft-start function to control the

rise rate of the charging current rising from zero to the

fast-charging current level in constant current mode. Dur-

ing charger soft-start, the APL3201 ramps up the voltage

on ISET pin with constant well-controlled slew rate. The

charging current is proportional to the ISET voltage. The

soft-start interval is 7ms (typical), which is independent

of the fast-charging current level.

ICHG

4.2V

VBATT

3.0V

Precharge

Full Charge

Constant Current

Mode

Voltage

Mode

Figure 2. Typical Charging Profile

Charge

Done

Copyright © ANPEC Electronics Corp.

10

Rev. A.4 - Mar., 2009

www.anpec.com.tw

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