FAN7319 Просмотр технического описания (PDF) - Fairchild Semiconductor

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FAN7319

LCD Backlight Inverter Drive IC

Fairchild Semiconductor 

striking mode only for 6.9s, as shown in Figure 41. After

ignition, if V min is less than 0.5V in normal mode, the

OLR

IC is shut down after a delay of 500ms, as shown in

Figure 42. In DCR mode (VENA>2.5V), if V min is less

OLR

than 0.5V in normal mode; the IC operates normally

without shutdown, as shown in Figure 43.

Figure 38. Open-Lamp Regulation in Striking Mode

Figure 41. Open-Lamp Protection in Striking Mode

Figure 39. Open-Lamp Regulation in Normal Mode

CMP

0

OVPR

OLR 0

-OVPR

1V

TIMER

\WœhGjœ™™Œ•›Gz–œ™Š•Ž

zœ›G‹–ž•

0

OUTA

OUTB

0

OUTC

OUTD

0

Figure 40. Over-Voltage Protection in Normal Mode

Open-Lamp Protection

If the minimum of the rectified OLP voltage V min is

OLR

less than VOLP during initial operation, the IC operates in

Figure 42. Open-Lamp Protection in Normal Mode

Figure 43. Open-Lamp Protection in DCR Mode

© 2010 Fairchild Semiconductor Corporation

FAN7319 • 1.0.1

17

www.fairchildsemi.com

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