LP8556 datasheet(21/63 Pages) TI1

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LP8556

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SNVS871I – JULY 2012 – REVISED MARCH 2016

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Table 5. Setting Switching and PWM Dimming Frequency With an External Resistor

RFSET [Ω] (Tolerance)

ƒSW [kHz]

ƒPWM [Hz] (Resolution)

Floating or FSET pin pulled HIGH

1250

9616 (10-bit)

470k - 1M (±5%)

312

2402 (12-bit)

300k, 330k (±5%)

312

4808 (11-bit)

200k (±5%)

312

6010 (10-bit)

147k, 150k, 154k, 158k (±1%)

312

9616 (10-bit)

121k (±1%)

312

12020 (9-bit)

100k (±1%)

312

14424 (9-bit)

86.6k (±1%)

312

16828 (9-bit)

75.0k (±1%)

312

19232 (9-bit)

63.4k (±1%)

625

2402 (12-bit)

52.3k, 53.6k (±1%)

625

4808 (11-bit)

44.2k, 45.3k (±1%)

625

6010 (10-bit)

39.2k (±1%)

625

9616 (10-bit)

34.0k (±1%)

625

12020 (9-bit)

30.1k (±1%)

625

14424 (9-bit)

26.1k (±1%)

625

16828 (9-bit)

23.2k (±1%)

625

19232 (9-bit)

20.5k (±1%)

1250

2402 (12-bit)

18.7k (±1%)

1250

4808 (11-bit)

16.5k (±1%)

1250

6010 (10-bit)

14.7k (±1%)

1250

9616 (10-bit)

13.0k (±1%)

1250

12020 (9-bit)

11.8k (±1%)

1250

14424 (9-bit)

10.7k (±1%)

1250

16828 (9-bit)

9.76k (±1%)

1250

19232 (9-bit)

FSET pin shorted to GND

1250

Same as PWM input

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