RT9428

7

DS9428-01

October 2014

www.richtek.com

©

Copyright

2014 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Typical Operating Characteristics

°°°°°C, battery is Sanyo UF534553F, unless otherwise specified.)

* : Sample accuracy with custom parameters into the IC.

Voltage ADC Error vs. Temperature

-25

-20

-15

-10

-5

0

5

10

15

20

25

-20

-5

1025405570

Temperature (°C)

VBAT = 3V

VBAT = 3.6V

VBAT = 4.3V

Constant Discharge C/4 SOC Accuracy *

0

10

20

30

40

50

60

70

80

90

100

0

2

4

6

8

1012

1416

1820

Time (h)

-10

-8

-6

-4

-2

0

2

4

6

8

10

Reference SOC

RT9428 SOC

Error

Constant Discharge C/2 SOC Accuracy *

0

10

20

30

40

50

60

70

80

90

100

02

468

10

12

14

Time (h)

-10

-8

-6

-4

-2

0

2

4

6

8

10

Reference SOC

RT9428 SOC

Error

Zigzag Discharge C/2 SOC Accuracy *

0

10

20

30

40

50

60

70

80

90

100

0246

8

10

12

Time (h)

-10

-8

-6

-4

-2

0

2

4

6

8

10

Reference SOC

RT9428 SOC

Error

Quiescent Current vs. Supply Voltage

0

5

10

15

20

25

30

35

40

2.5

2.75

3

3.25

3.5

3.75

4

4.25

4.5

Supply Voltage (V)

70

°C

25

°C

−20°C