AS3688 datasheet(36/72 Pages) AMSOSRAM

36 / 72 page

AS3688

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (ptr,tje)

Revision 1.1.1 / 20060707

34 - 70

Rgb2 current

Addr: 0Ch

This register controls the RGB current sink current.

Bit

Bit Name

Default

Access

Description

7:0

rgb2_current

R/W

Defines current into Current sink RGB2

00h = 0 mA

01h = 0.15 mA

...

FFh = 38.25 mA

Rgb3 current

Addr: 0Dh

This register controls the RGB current sink current.

Bit

Bit Name

Default

Access

Description

7:0

rgb3_current

R/W

Defines current into Current sink RGB3

00h = 0 mA

01h = 0.15 mA

...

FFh = 38.25 mA

7.4.4 General Purpose Current Sinks CURR41, CURR42, CURR43

The current sinks CURR42 and CURR43 are only available in the device version AS3688B. In the AS3688B

version , the dcdc step up converter is not available.

The general purpose current sink can only be used if the DCDC step up converter is not required. The current

sink on the pin DCDC_FB can even be used together with the dcdc converter in current feedback mode without

overvoltage protection. These low voltage current sinks have a resolution of 8 bits and can sink up to 40mA.

Symbol

Parameter

Min

Typ

Max

Unit

Note

IBIT7

Current sink if Bit7 = 1

19.2

IBIT6

Current sink if Bit6 = 1

9.6

IBIT5

Current sink if Bit5 = 1

4.8

IBIT4

Current sink if Bit4 = 1

2.4

IBIT3

Current sink if Bit3 = 1

1.2

IBIT2

Current sink if Bit2 = 1

0.6

IBIT1

Current sink if Bit1 = 1

0.3

IBIT0

Current sink if Bit0 = 1

0.15

For V(CURRx) > 0.2V

∆m

matching Accuracy

-8

CURR41,42,43; full scale

∆

absolute Accuracy

-15

+15

V(CURR4x) < VBAT-1.0V

Curr41,42

,43

Voltage compliance

0.2

VBAT

AS3688 数据表(PDF) 36 Page - ams-OSRAM AG

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