RT5002 datasheet(28/40 Pages) RICHTEK

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RT5002

DS5002-00

November 2011

www.richtek.com

Charger State

Bit EOC

Bit PGOOD

Bit SAFE

Charging

Charging Suspended by Thermal Loop

Safety Timers Expired

Charging Done

Recharging after Termination

IC Disabled or no Valid Input Power

Charge State

Wake-Up Detector

Wake-Up Detector detects VINor BAT plug-in events. Once

one of them plug-in, WAKE pin asserts one 55ms-width

high pulse. The timing diagram is shown below.

WAKE Timing Diagram

Battery Installation Detection

RT5002 also detect TS voltage to judge the battery

installation status. If PMU is enabled but TS voltage >

90% of VP node voltage, RT5002 would set the bit NoBAT

= 1 in I

2C register bank 0x2.

End_Of_Charge (EOC) Status

The bit EOC in I

2C register bank 0x2 can show the EOC

status. If EOC = 1, the Charger is in EOC State.

Suspend Mode

Set USUS = 1, and the charge will enter Suspend Mode.

In Suspend Mode, IUSUS (MAX) < 300

µA.

Battery Sense

When PMU is turned on, BATS = 59.8% x BAT, The

RT5002 detects the battery level from BATS voltage level.

Interrupt Indicator

The RT5002 provides the interrupt indicator output pin (INT).

INT is an open drain pin.

When the status bits (PGOOD, TS_FAULT, EOC, SAFE)

of I

2C register address 0x2 toggle, the INT is set to be

low. After Reg 0x2 is read or PMU turn off, INT goes high.

±0.4ms

BATS

VOUT2

VIN

WAKE

BAT

55ms

3.3V

2.7V

RT5002 Datasheet(PDF) 28 Page - Richtek Technology Corporation

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