FAN7300 Datasheet, PDF (2/12 Pages) Fairchild Semiconductor – LCD Back Light Inverter Drive IC

FAN7300
Internal Block Diagram
VZ
Vcc
ENA
5.4V
UVLO
+
-
Vz
Internal
Bias
1.5Vref
8V
VS
S_S
EA_IN
Vm2
-
+
1.5V
Vz
8uA
+
Va
+
-
Error Amp.
Buffer
Multiplier
Gain
K
Vmo
Vm1
EA_OUT
OLR
3V
COMP3
+
-
Va
E/A
Controller
Current
Generator
-
COMP1
RQ
+
SQ
max. 1.75V
Clock
Main Control
Oscillator
min. 0.25V
COMP2
max. 1.75V
min. 0.25V
Vb
Dimming control and Mode Selection
DIM
Analog
Burst
Mixed
3V
RS
Q
COMP6
COMP7
V3
SCP
3V
Vz
3.7V
3.7V
3V
2uA
OLP
COMP4
COMP5
1.5V
1.5V
High side
gate driver
Low side
gate driver
CPUMP
OUT_H
OUT_L
GND
Rt
Ct
V3
50K
50K
BCt
DIM_MODE
2