AS3689 datasheet(25/72 Pages) AMSOSRAM

25 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

23 - 70

Table 10 – Current Sink Function Overview

Resolution

Current Sink

Max.

Voltage

(V)

Max.

Current

(mA)

(Bits)

(mA)

Software

Current

Control

Hardware On/Off

Control

Alternate Function

CURR1

CURR2

CURR6

15.0

38.25

0.15

Separate

LED Pattern;

PWM at GPIO;

Internal PWM

CURR30

CURR31

CURR32

CURR33

37.8

0.6

Combined in

Strobe/Preview

Separated

Flash LED Strobe

(GPI) & Preview

(GPIO);

PWM at GPIO;

Internal PWM;

Ext-Overtemp on

GPIO

LED Pattern

N/A

RGB1

RGB2

RGB3

38.25

0.15

Separate

LED Pattern;

PWM at GPIO;

Internal PWM

OLED Charge Pump

RGB3: LDO

CURR41

CURR42

CURR43

38.25

0.15

Separate

LED Pattern;

PWM at GPIO;

Internal PWM

CURR51

CURR52

VBAT

(5.5V)

38.25

0.15

Separate

LED Pattern;

PWM at GPIO;

Internal PWM

N/A

7.4.1 High Voltage Current Sinks CURR1, CURR2, CURR6

The high voltage current sinks have a resolution of 8 bits. Additionally an internal protection circuit monitors with

a voltage divider (max 3µA @ 15) the voltage on CURR1, CURR2 and CURR6 and increases the current in off

state in case of overvoltage. See section ‘Typical Operating Characteristics’ Figure ‘Current Sink CURR1,

CURR2, CURR6 Protection Current’. This shows the protection current versus applied voltage depending on the

External PWM control of these current sinks is possible and can be enabled by software (Input pin GPIO).

Table 11 – HV - Current Sinks Characteristics

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) > 0.45V

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