AME9001 Datasheet, PDF (9/27 Pages) Analog Microelectronics – CCFL BACKLIGHT CONTROLLER

AME, Inc.
AME9001
CCFL Backlight Controller
Figure 3. Idealized Gate Drive Waveforms
Q2 Gate
(OUTA)
Q3-1 Gate
(OUTAPB)
Q3-2 Gate
(OUTC)
V_BATT
V_BATT- 7.5V
5V
0V
5V
0V
Figure 4.
Power Stage Single Tube Components
(Same component designations used as for Figures 1 and 2)
V_BATT
OUTA
D = 0-100%
Vhi = Vbatt
Vlo = Vbatt-7.5V
F = fosc
OUTAPB
D=50%
Vhi = 5V
Vlo = 0V
F = fosc/2
Q3-1
Q2
T1
Q3-2
OUTC
D=50%
Vhi = 5V
Vlo = 0V
F = fosc/2
Figure 5.
Power Stage Single Tube Components
with parasitic elements
(Same component designations used as for Figures 1 and 2)
V_BATT
OUTA
D = 0-100%
Vhi = Vbatt
Vlo = Vbatt-7.5V
F = fosc
Lp
Q2
Lp
OUTAPB
D=50%
Vhi = 5V
Vlo = 0V
F = fosc/2
Q3-1
T1
Q3-2
1:N
L _leak
OUTC
D=50%
Vhi = 5V
Vlo = 0V
F = fosc/2
Signals OUTC
and OUTAPB
are the inverse
of each other.
CCFL
Signals OUTC
and OUTAPB
are the inverse
of each other.
C_parasitic
CCFL
D5
D4
To Control
Circuitry
R9+R10
D5
D4
To Control
Circuitry
R9+R10
9