Chapter 1
29
Electrical Characteristics
No
.
Paramete
r
Symbol
Min.
Typ.
Max.
Unit
Comment
1
Input
voltage
NV_PW
R
9
14.8
21
V
7.5V (continuous) can
work
*Note 1
2
Input
current
Iin
--
0.33
--
A
3
Lamp
current
IL
3.0
--
6.8
mA
DAC=0V
*Note 2
4
Lamp
current
IL
2.7
--
6.3
mA
DAC=1V
4
Frequenc
y
F
45
55
65
KHz
* Note 3
5
Output
power
Pout
--
--
4.5
W
6
Efficiency
η
80%
--
--
--
7
Starting
voltage
Vs
1600
--
---
V
At 0’C
8
Starting
time
Tvs
1
--
1.5
Sec
9
Dispoff#
2.8
3.3
3.6
V
Backlight on/off signal
0
0.5
0.8
V
Low level
10
Limited
lamp
maximum
current
DAC-
BRIG
0
3.3
V
*Note 2
11
PWM
signal
*Note 4
INV_PW
M
142
150
158
Hz
PWM signal frequency
3.0
3.3
3.6
V
PWM signal amplitude
30
--
100
%
12
Lamp
current
over-
shoot
I zero-
PK
--
--
10
%
Line transient (10.8V to
21V/100us) and turn
on transient
13
Current
Wavefor
m factor
1.27
1.56
Multipl
e
or
*10
14
Unbalanc
e Rate
-10%
0
+10%
Mulitpl
e
15
Turn off
current
(Hight
side)
IHl
--
--
0
A
PWM=30%
Duty
Ton
Period
-------------------
=
rms
p
I
I
2
rms
p
I
I
−
rms
p
p
I
I
I
−
−
