RT5021 datasheet(53/67 Pages) RICHTEK

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RT5021

DS5021-01 April 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Address

Name

Address

Bit7

(MSB)

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

(LSB)

Meaning

TSHT[1:0]

Mask_DPM CHG2STEN

ISETA [3:0]

Default

0x08

Read/Write

R/W

Set TS/VP threshold to monitor battery temperature for HOT boundary.

Equivalent Battery Temperature

Code

TS/VP

ratio

10k NTC

100k NTC

28%

60°C

28.5%

58°C

59°C

29%

56°C

57°C

TSHT [1:0]

29.5%

54°C

56°C

Mask DPM function

0 : When DPM event change, INT would be asserted.

Mask_DPM

1 : When DPM event change, INT would not be asserted.

Used to control CHG2 pin status.

0 : See FLSH2 set.

CHG2STEN

1 : Base on charging status.

CHG2STEN = 0 (A8.bit4 = 0)

Charging Status

CHG2STEN = 1

(A8.bit4 = 1)

FLST2 = 1

(A5.bit3 = 1)

FLST2 = 0

(A5.bit3 = 0)

No Charging/

Charging Finish

High impedance

(No flashing)

Pre-Charge/

Fast Charge

Low

Abnormal (Fault timer

timeout, in thermal

regulation, battery too

cold or too hot

4Hz (0.25s)

High

Impedance

Low

RT5021 allows user to set the battery charge current level and the list as below.

The default value is 0.5A.

Code

BAT

Charge

Current

Code

BAT

Charge

Current

Code

BAT

Charge

Current

Code

BAT

Charge

Current

0000

0.1A

0001

0.2A

0010

0.3A

0011

0.4A

0100

0.5A

0101

0.6A

0110

0.7A

0111

0.8A

1000

0.9A

1001

1010

1.1A

1011

1.2A

ISETA [3:0]

1100

1.2A

1101

1.2A

1110

1.2A

1111

1.2A

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