APL3206 データシートの表示（PDF） - Anpec Electronics

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APL3206

Li+ Charger Protection IC with Integrated P-MOSFET

Anpec Electronics 

APL3206/A/B

Function Description

ACIN Power-On-Reset (POR)

The APL3206/A/B has a built-in power-on-reset circuit to

keep the output shutting off until internal circuitry is oper-

ating properly. The POR circuit has hysteresis and a de-

glitch feature so that it will typically ignore undershoot

transients on the input. When the input voltage exceeds

the POR threshold and after 8ms blanking time, the out-

put voltage starts a soft-start to reduce the inrush current.

ACIN Over-Voltage Protection (OVP)

The input voltage is monitored by the internal OVP circuit.

When the input voltage rises above the input OVP

threshold, the internal FET will be turned off within 1ms to

protect connected system on OUT pin. When the input

voltage returns below the input OVP threshold minus the

hysteresis, the FET is turned on again after 8ms recovery

time. The input OVP circuit has a 300mV hysteresis and

a recovery time of TON(OVP) to provide noise immunity against

transient conditions.

Over-Current Protection (OCP)

The output current is monitored by the internal OCP circuit.

When the output current reaches the OCP threshold, the

device limits the output current at OCP threshold level. If

the OCP condition continues for a blanking time of TB(OCP),

the internal power FET is turned off. After the recovery

time of TON(OCP), the FET will be turned on again. The

APL3206/A/B has a built-in counter. When the total count

of OCP fault reaches 16, the FET is turned off permanently,

requiring a V POR again to restart.

ACIN

Battery Over-Voltage Protection

The APL3206/A/B monitors the VBAT pin voltage for bat-

tery over-voltage protection. The battery OVP threshold is

internally set to 4.35V. When the VBAT pin voltage ex-

ceeds the battery OVP threshold for a blanking time of T

B

, the internal power FET is turned off. When the VBAT

(BOVP)

voltage returns below the battery OVP threshold minus

the hysteresis, the FET is turned on again. The APL3206/

A/B has a built-in counter. When the total count of battery

OVP fault reaches 16, the FET is turned off permanently,

requiring a V POR again to restart.

ACIN

Over-Temperature Protection

When the junction temperature exceeds 160oC, the inter-

nal thermal sense circuit turns off the power FET and

allows the device to cool down. When the device’s junc-

tion temperature cools by 40oC, the internal thermal

sense circuit will enable the device, resulting in a pulsed

output during continuous thermal protection. Thermal pro-

tection is designed to protect the IC in the event of over

temperature conditions. For normal operation, the junc-

tion temperature cannot exceed T =+125oC.

J

Internal P-MOSFET

The APL3206/A/B integrates a P-channel MOSFET with

the body diode reverse protection to replace the external

P-MOSFET and Schottky diode for cell phone’s PMIC. The

body diode reverse protection prevents a reverse current

flowing from the battery back to CHRIN pin. During power-

on, when CHRIN voltage rises above the VBAT voltage by

more than 150mV, the body diode of the P-channel

MOSFET is forward biased from OUT to CHRIN, and P-

MOSFET is controlled by the external GATDRV voltage.

When the CHRIN voltage drops below VBAT+20mV, the

body diode of the P-channel MOSFET is forward biased

from CHRIN to OUT and P-channel MOSFET is turned

off. When any of input OVP, OCP, battery OVP, is detected,

the internal P-channel MOSFET is also turned off.

ESD Tests

The APL3206/A/B VIN input pin fully supports the

IEC61000-4-2. That means the VIN pin has immunity of

±15kV ESD discharge in Air condition, and immunity of

±8kV ESD discharge in Contact condition.

Copyright © ANPEC Electronics Corp.

10

Rev. A.4 - Jan., 2010

www.anpec.com.tw

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