
BD8119FM-M
● Reference data (unless otherwise specified, Ta=25 ℃ )
Technical Note
5.5
5.3
5.1
4.9
4.7
4.5
V CC =12V
400
360
320
280
240
200
V CC =12V
55
53
51
49
47
45
V CC = 12V
-40
-15 10 35 60
TEMPERATURE:Ta [ ℃ ]
85
-40
-15 10 35 60
TEMPERATURE:Ta [ ℃ ]
85
0.5
1.5 2.5 3.5
LED VOLTAGE:VLED[V]
4.5
55
53
51
49
47
45
Fig.1 VREG
temperature characteristic
V CC = 12V
50
40
30
20
10
0
Fig.2 OSC
temperature characteristic
5
4
3
2
1
0
Fig.3 ILED depend on VLED
-40
-15 10 35 60
85
0
0.5 1 1.5
2
0
0.02 0.04 0.06 0.08
0.1
100
85
70
TEMPERATURE:Ta [ ℃ ]
Fig.4 ILED
temperature characteristic
100
85
70
VDAC VOLTAGE:VDAC[V]
Fig.5 VDAC Gain ①
10.0
8.0
6.0
VDAC VOLTAGE:VDAC[V]
Fig.6 VDAC Gain ②
55
40
V CC =12V
V CC =30V
55
40
V CC =30V
V CC =15V
4.0
2.0
V CC =12V
V CC =5V
V CC =4V
25
25
0.0
25
150 275 400 525
25
150 275 400 525
0
6 12 18 24 30
36
0.66
0.64
0.62
0.60
0.58
0.56
0.54
OUTPUT CURRENT [mA]
Fig.7 Efficiency
(Depend on input voltage)
V CC =12V
10
8
6
4
2
0
OUTPUT CURRENT [mA]
Fig.8 Efficiency
(Depend on output voltage)
10
8
6
4
2
0
SUPPLY VOLTAGE:Vcc [V]
Fig.9 Circuit Current
(Switching OFF)
-40
-15 10 35 60
TEMPERATURE:Ta [ ℃ ]
85
0
1
2 3 4
EN VOLTAGE:VEN [V]
5
0
1 2 3 4
PWM VOLTAGE:VEN [V]
5
Fig.10 Overcurrent detecting
voltage temperature characteristic
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Fig.11 EN threshold voltage
4/20
Fig.12 PWM threshold voltage
2011.08 - Rev.B