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AS3606 Datasheet(PDF) 21 Page - ams AG

Part No. AS3606
Description  System PMU with HV Back Light Driver
Download  71 Pages
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Maker  AMSCO [ams AG]
Homepage  http://www.ams.com
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AS3606 Datasheet(HTML) 21 Page - ams AG

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www.austriamicrosystems.com
Revision 1.03
20 - 70
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
UStep up_out
µA
R1 = 1M
Ω, R2 not used
R1 = 500k
Ω, R2 = 50kΩ
0-
13.75
1-
14.25
2-
14.75
3-
15.25
4-
15.75
56.25
16.25
67.25
16.75
78.25
17.25
89.25
17.75
9
10.25
18.25
10
11.25
18.75
11
12.25
19.25
12
13.25
19.75
13
14.25
20.25
14
15.25
20.75
15
16.25
21.25
………
30
31.25
28.75
31
32.25
29.25


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