AS3689 datasheet(42/72 Pages) AMSOSRAM

42 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

40 - 70

Table 17 – External Charge Pump Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Note

Vfb00

Negative output mode

feedback voltage

-20

Regulated, with internal current

source

Ifb

Feedback current

9.7

10.3

µA

Current sourced at feedback pin

for negative mode

Vfb01

Positive output mode

feedback voltage

1.22

1.25

1.28

Regulated, with two external

resistors

Vout00

Output Voltage mode 00b

-6

with external 600k resistor

Vout01

Output Voltage mode 01b

with external 125kΩ resistor

and 1.375 MΩ

Battery Voltage 3.5V

Efficiency

Battery Voltage 4.2V

Iout

Output Current

@ -6V

Iout

Output Current

@ +15V

Figure 22 – Charge Pump for Generation of negative voltages

O-LED Charge

Pump

RGB2

AS3689

RGB1

RGB3

600kΩ

220pF

100nF

2.2µF

-6V,

10mA

10µA

Pulse

Skip

100nF

BAS40

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