AS3606 datasheet(21/71 Pages) AMSCO

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AS3606 AS3607 2v2

Data Sheet - D e t a i l e d D e s c r i p t i o n - P o w e r M anage ment F uncti ons

Note:

The voltage on CURR1 and CURR2 must not exceed 30V.

8.3.2 Over Voltage Protection (OVP)

Setting bit SU_CURR_FB = 1 enables feedback via the current sink pins. The voltage on the current sink pin is regulated to VCURR. The

selection of the current sink with the larger load is done automatically. The pin FBSU acts as an overvoltage protection in this mode. Please be

sure to set the voltage to a higher level than needed to drive the longer LED string. the calculation of the resistor can be done the same as

described in the chapter above.

8.3.3 DLS & Dimming

AS3606/07 feature external dimming inputs via CURR1, CURR2, GPIO1 or GPIO2 by directly connecting a PWM output of e.g. the display

controller for DLS (dynamic luminance scaling). Manual dimming can be done at any time by setting the sink current via I2C commands.

8.3.4 Current Sinks

The current sinks work independent from each other and can also be used without the booster, or can act as a dimming input if they are not

needed as a sink.

Table 6. Voltage Feedback Example Values

IDCDC_FB

UStep up_out

µA

R1 = 1M

Ω, R2 not used

R1 = 500k

Ω, R2 = 50kΩ

13.75

14.25

14.75

15.25

15.75

56.25

16.25

67.25

16.75

78.25

17.25

89.25

17.75

10.25

18.25

11.25

18.75

12.25

19.25

13.25

19.75

14.25

20.25

15.25

20.75

16.25

21.25

………

31.25

28.75

32.25

29.25

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