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LP8556 датащи(PDF) 20 Page - Texas Instruments

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номер детали LP8556
подробное описание детали  High-Efficiency LED Backlight Driver for Tablets
PDF  63 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

LP8556 датащи(HTML) 20 Page - Texas Instruments

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LP8556
SNVS871I – JULY 2012 – REVISED MARCH 2016
www.ti.com
Product Folder Links: LP8556
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
(1)
See Table 5.
8.3.2.7 Setting PWM Dimming Frequency
LP8556 PWM dimming frequency can be set by an external resistor, RFSET, or by pre-configuring EPROM
Memory (CFG5 register, PWM_FREQ[3:0] bits). Table 4 summarizes setting of the PWM dimming frequency.
Note that .
NOTE
The RFSET is shared for setting the boost switching frequency, too. Setting the boost
switching frequency and PWM dimming frequency using an external resistor is shown in
Table 5.
Table 4. Configuring PWM Dimming Frequency via EPROM
RFSET [kΩ]
PWM_FSET_EN
PWM_FREQ[3:0]
ƒPWM [Hz] (Resolution)
don't care
0
0000
4808 (11-bit)
0001
6010 (10-bit)
0010
7212 (10-bit)
0011
8414 (10-bit)
0100
9616 (10-bit)
0101
12020 (9-bit)
0110
13222 (9-bit)
0111
14424 (9-bit)
1000
15626 (9-bit)
1001
16828 (9-bit)
1010
18030 (9-bit)
1011
19232 ((9-bit)
1100
24040 (8-bit)
1101
28848 (8-bit)
1110
33656 (8-bit)
1111
38464 (8-bit)
See(1)
1
don't care
See(1)



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