AS3681

Product Brief

© 1997-2004, austriamicrosystems

USA, Inc. 8601 Six Forks Road, Suite 400 Raleigh,NC 27615 USA. All Rights Reserved.

www.austriamicrosystems.com

Revision 1.0

2 - 4

4 Block Diagrams

Figure 1. Option (by software): Step Up DC/DC Converter (Pins 23, 24, 28, 29) and External Charge Pump (Pins

25, 26, 27).

LDO

e.g. 2.8V

AS3681

Power Management

Unit

Charge Pump

1:1, 1.5:1, 2:1

400mA

Step Up DC/DC

Converter

Current Sinks

10-150mA

SENSE_P

SENSE_N

23

24

Battery

29

DCDC_FB

4

2

7

8

C6

1µF

C7

1µF

C5

2.2µF

Current Sinks

2.5-37.5mA

19

20

11

10

9

5

3

6

28

DCDC_GATE

Serial

Interface

CLK

Device Address Selector

R6

1-10k

Ω

V

DD_G

1

ADDR

17

DATA

18

CLK

C8

2.2µF

D6

D7

D8

Camera Flash

Module

C11

15nF

D9

D10

D11

D12

D13

D14

R4

100k

Ω

C10

1.5µF

R3

1M

Ω

C9

2.2µF

White LEDs

Backlight

R2

0.15

Ω

D1

Battery

Q1

10µH, 5x5x1.2mm

SD12-100

Coiltronics

LDO

1.85-3.4V

150mA

21

Bandgap

and

30

32

31

O-LED

Charge Pump

25

OLED_FB

27

OLED2

26

OLED1

V

DD_G

14

GPIO1

15

GPIO0

16

GPIO2

13

GPIO3

12

R5

600k

Ω

Feedback

D2

D3

D4

D5

C14

100nF

C13

100nF

C12

100nF

C15

2.2µF

C1

100nF

R1

240k

Ω

C4

1µF

C3

2.2µF

2.5V

22

C2

1µF

Pulse Skip

GPIO/

ADC

-6V

10mA

30

Exposed Pad