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AS3675

Datasheet - D e ta i l e d D e s c r i p t i o n

8.4.2

Current Sinks CURR30, CURR31, CURR32, CURR33

These current sinks have a resolution of 8 bits and can sink up to 38.25mA. The current values can be controlled indi-

vidually with curr30_current – curr33_current or common with curr3x_strobe or curr3x_preview.

Table 27. curr rgb control

Addr: 02h

curr rgb control

This register select the mode of the current sinks CURR6.

Bit

Bit Name

Default Access

Description

7:6

curr6_mode

0R/W

Select the mode of the current sink CURR6

00b

off

01b

10b

PWM controlled

11b

LED pattern controlled

Table 28. DCDC control2

Addr: 22h

DCDC control2

This register controls the Step Up DC/DC Converter and low-voltage current

sinks CURR3x.

Bit

Bit Name

Default Access

Description

curr1_prot_on

0R/W

No over voltage protection

Pull down current on CURR1 switched on, if

voltage on CURR1 exceeds 13.75V, and

step_up_on=1

curr2_prot_on

0R/W

No over voltage protection

Pull down current on CURR2 switched on, if

voltage exceeds on CURR2 13.75V, and

step_up_on=1

curr6_prot_on

0R/W

No over voltage protection

Pull down current on CURR6 switched on, if

voltage on CURR6 exceeds 13.75V, and

step_up_on=1

Table 29. Current Sinks CURR30,31,32,33 Parameters

Symbol

Parameter

Condition

Min

Typ

Max

Unit

IBIT7

Current sink if Bit7 = 1

For V(CURR3x) > 0.2V

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

Δm

matching Accuracy

CURR30-33

-10

+10

absolute Accuracy

-15

+15

VCURR3X

Voltage compliance

0.2

CPO

curr3x_strobe_high=1 and strobe function

0.4

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