NCP5006 ON Semiconductor, NCP5006 Datasheet - Page 17

• Manufacturer Part Number: NCP5006
• Description: Compact Backlight LED Boost Driver
• Manufacturer: ON Semiconductor

Digital Control
be implemented by providing a PWM signal to this pin (see
Figure 31). The output current depends upon the Duty
control, is depicted in Figures 32 and 33. The tests have
Due to the EN pin, a digitally controlled luminosity can
The PWM operation, using the EN pin as a digital
Pulse
GND
NOTE: Pulse width and frequency depends upon the application constraints.
Figure 31. Typical Semi−Pulsed Mode of Operation
22 W
Figure 32. Operation @ PWM = 10 kHz, DC = 10%
R1
GND
LWT67C LWT67C LWT67C LWT67C LWT67C
4
2
3
D6
NCP5006
U1
EN
GND
FB
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NCP5006
D5
V
V
out
bat
17
5
1
Cycle, but care must be observed as the DC/DC converter
is continuously pulsed ON/OFF and noise are likely to be
generated.
been carried out at room temperature with V
L = 22 mH, five LEDs in series, RFB = 22 W.
V
D4
bat
L1
22 mH
D3
MBR0530
D1
4.7 mF
C1
D2
GND
GND
VPWM
VFB
V
C2
1.0 mF
PWM
out
bat
= 3.60 V,