Wide Brightness Range
CCFL Backlight Controllers
Typical Operating Characteristics
(VIN = 12V, VCTL = VCRF, VMINDAC = 1V, MODE = GND, Circuit of Figure 8.)
WIDE INPUT RANGE
(VBATT = 8V)
WIDE INPUT RANGE
(VBATT = 20V)
VCTAP
5V/div
VCTAP
5V/div
VCSAV
500mV/div
VDH
20V/div
4µs/div
WIDE INPUT RANGE
(VBATT = 8V, DPWM = 9%, VCTL = 0)
VCTAP
10V/div
VCCI
VCCV
VCCV
VCCI
VCCI
VCCV
100µs/div
VCSAV
500mV/div
VCCV, VCCI
200mV/div
1.2V
VCSAV
500mV/div
VDH
20V/div
4µs/div
WIDE INPUT RANGE
(VBATT = 20V, DPWM = 9%, VCTL = 0)
VCTAP
10V/div
VCCI
VCCV
VCCV
VCCI
100µs/div
VCCI
VCCV
VCSAV
500mV/div
VCCV, VCCI
200mV/div
1.2V
FEED-FORWARD COMPENSATION
SWITCHING WAVEFORMS
20µs/div
20V
VIN
10V
VCTAP
5mV/div
VCSAV
500mV/div
VDH
20V/div
4µs/div
6 _______________________________________________________________________________________
VCTAP
10V/div
VCSAV
500mV/div
VDH
20V/div
VDL
5V/div