RT5002 datasheet(5/40 Pages) RICHTEK

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RT5002

DS5002-00

November 2011

www.richtek.com

Functional Pin Description

Pin No.

Pin Name

Pin Function

INT

Interrupt Indicator Open Drain Output. If any toggle events of TS_FAULT, PGOOD,

EOC, or SAFE happen, the output INT goes low. After I

C register bank address

0x2 is read or power on reset, INT goes high.

FB1

Feedback Input of CH1.

VDDM

IC Analog Power Pin.

FB7

Feedback Input of CH7 in Step-Up Mode or Current Sink Pin of CH7 in Current

Source Mode.

PVD7

Power Output of CH7

LX7

Switch Node of CH7 in Step-Up Mode.

BATS

Output pin of voltage divider for battery voltage level sensing enabled after CH2

soft-start end. BATS voltage is about 60% of BAT.

LX4

Switch Node of CH4.

PVD4

Power Input of CH4.

FB4

Feedback Input of CH4.

ISETA

Charge Current Set Input. Connect a resistor (RISETA) between ISETA and GND.

Temperature Sense Input. The TS pin connects to a battery’s thermistor to

determine whether the battery is too hot or too cold to be charged. If the battery’s

temperature is out of range, charging is paused until it re-enters the valid range.

TS also detects whether the battery (with NTC) is present or not.

Power Output of 3.3V Buffer for Battery Temperature Sensing.

SDA

Data Signal Pin of I

C Interface.

SCL

Clock Signal Pin of I

C Interface.

PVD6

Power Input of CH6.

LX6

Switch Node of CH6.

VOUT6

Sense Input of CH6 Inverting Output Node.

FB6

Feedback Input of CH6.

VREF

1.8V Reference Output.

FB3

Feedback Input of CH3.

PVD3

Power Input of CH3.

LX3

Switch Node of CH3.

EN1234

Enable Pin of CH1, CH2, CH3, and CH4.

FB5

Feedback Input of CH5.

PVD5

Power Output of CH5.

LX5

Switch Node of CH5.

TSSEL

Input Pin to Select Temperature Sensing Thresholds. Thresholds of TSSEL = H are

60% and 38% of VP voltage. Thresholds of TSSEL = L are 74% and 28% of VP

voltage.

FB2

Feedback Input of CH2.

WAKE

Wake-Up Impulse Push-Pull Output. If VIN or BAT plug in, WAKE pin generates

one 55ms width high pulse to notify micro processor.

LX2

Switch Node of CH2.

PVD2

Power Input of CH2.

To be continued

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