RT5021 datasheet(38/67 Pages) RICHTEK

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RT5021

DS5021-01 April 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Battery Installation Detection

RT5021 also detects TS voltage to monitor the battery status. If PMU is enabled but TS voltage > 90% of VP node

voltage, RT5021 sets the bit

NoBAT = 1 an I2C register A10.NoBAT and sets A9.INT bit to

“1”.

No Battery Installed (TS > 90% of VP)

NoBAT

BAT Installed

VIN < VUVLO

VUVLO < VIN < VBAT + VOS_L

VBAT + VOS_H < VIN < VOVP

PGOOD

VIN > VOVP

VIN Power Good Status

End_Of_Charge (EOC) Status

The bit EOC in I

2C register A10.EOC can show the EOC status. If EOC = 1, the charger is in EOC state and A9.INT bit

is set to

“1”

Charging Done or Recharging after Termination

EOC

During Charging

Wake-Up Detector

Wake-Up Detector detects VIN or BAT plug-in events. Once BAT plugs in or VIN plugs in for a 19msec deglitch time, the

WAKE pin will provide a 90ms width high pulse. The timing diagram shows as below.

When PMU is enabled, WAKE UP impulse would be masked off. WAKE impulse width 90ms can not be cut by EN = H

90ms

WAKE

No WAKE

impulse

BAT plug in

BAT exists

VIN plug in

BAT/VIN plug in

VIN

90ms

3.1V

BAT

BAT > 3.1V

BAT > 3.1V WAKE Up

VIN > 3.75V when BAT > 3.1V

WAKE Up

3.1V

WAKE

20ms

<90ms

2.82V

VIN > 3.75V

3.75V

BAT < 2.82V (3.1V - 0.28V)

when VIN < 3.51V (3.75V - 0.24V)

Disable WAKE Up Suddenly

RT5021 数据表(PDF) 38 Page - Richtek Technology Corporation

RT5021 数据表(HTML) 38 Page - Richtek Technology Corporation

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