FAN7311B Datasheet, PDF (2/14 Pages) Fairchild Semiconductor – LCD Backlight Inverter Drive IC

Internal Block Diagram
RT
OSCILLATOR
max. 2V
min. 0.5V
CT
-
+
6μA
+
S_S
RT1
M_RT1
Striking
OLP
Logic
S_S
Output
Control
Logic
Output
Driver
Output
Driver
EA_OUT
ADIM
EA_IN
+ Error Amp.
-
S_olr 105μA
UVLO
SET
QS
2.5V
QR
CLR
S_olr
1.4μA
+
V_OLP+α
-
V_OLP
UVLO _{2.5V 1.5V}
+
- 2V
max. 2V
S_burst 85μA
V_a+α
BCT
BDIM
min. 0.5V
-
Positive
dimming polarity
+
S_burst
Voltage
Reference
&
Internal
Bias
AGND
UVLO
2.5V_REF
V_IN
+
-
+
- 1.4V
UVLO 5V
OUTA
OUTB
PGND
OUTC
OUTD
OLP
OLR
REF
ENA
V_IN
FAN7311B Rev.00
Figure 1. Functional Block Diagram of FAN7311B
© 2007 Fairchild Semiconductor Corporation
FAN7311B Rev. 1.0.0
2
www.fairchildsemi.com