an8353ub Panasonic Corporation of North America, an8353ub Datasheet - Page 4

• Manufacturer Part Number: an8353ub
• Description: High Efficiency Car Dashboard Dimmer Ic
• Manufacturer: Panasonic Corporation of North America

0.2 (B-point) and 0.8 (C-point). The A-point in the figure
shows the I/O characteristics when the “input voltage V
ply voltage V
about 0.2V (B-point), the duty is controlled to 0%, and when
V
100%.
by applying a voltage of about 1.1V or more to this pin.
When it is not necessary to forcibly turn off the output tran-
sistors, Leave the standby Pin8 open.
• System Operational Principle (cont.)
• Over voltage Detecting Voltage vs. Output
V
V
3
The standby Pin8 can forcibly turn off the output transistors
max V
/V
6
1
Supplementary Description (cont.)
/V
V
4
9
9
/V
(IV)
(III)
is from 0.8V (C-point) to t.0V, the duty is controlled to
9
6
/V
9
D
max V
1
50%
Fig. 2 I/O Characteristic Chart
0%
9
” is 0.7. And, when V
Turn-up Line
6
/V
9
1/f
T
OSC
ON
V
V
t
t
OV
4
/V
Duty
9
3
100%
/V
50%
0%
0.5
1
9
Duty=T
0
is from 0.05V to
B´
ON
(I)
B
· f
OSC
V
0.5
0.5
9–2
(II)
3
/sup-
A
A´
V
C
C´
3
/V
V
9
3
1
1
/V
9
• Duty D
• Standby Threshold Voltage vs. Output
· Output voltage at ON V
100k
10k
100
1M
1k
10
V
D
D
1k
Fig. 3 Relations between Oscillation Frequency and C
G
ON
1
=V
1
D
vs. Input Voltage V
100%
1
50%
D
CC
0%
0%
12V
–V
0
1–2
10k
V
IN–0
Resistance R
C
ON
T
=1 F
4V
C
IN
· Leakage current at OFF
T
100k
=0.1 F
V
6V
STH
T
I
L
( )
=
(V
C
8V
T
=0.01 F
CC
C
V
IM
T
1M
=12V)
=0.001 F
V
IN–100
1–2
V
V
CC
IN
V
=6V
=12V
8–2
T
and R
V
IN
10M
T