bd6581gu ROHM Co. Ltd., bd6581gu Datasheet - Page 3

• Manufacturer Part Number: bd6581gu
• Description: White Backlight Led Driver
• Manufacturer: ROHM Co. Ltd.

Fig.7 LED current vs PWMDRV-HI Duty
●Reference Data
BD6581GU
© 2010 ROHM Co., Ltd. All rights reserved.
Fig.10 LED current vs PWMPOW-HI Duty
www.rohm.com
Fig.1 Current Consumption vs VBAT
2.28
2.26
2.24
2.22
20
18
16
14
12
10
20
18
16
14
12
10
4.5
3.5
2.5
1.5
0.5
2.3
2.2
8
6
4
2
0
8
6
4
2
0
4
3
2
1
0
Fig.4 UVLO vs Temperature
-60
0 10 20 30 40 50 60 70 80 90 10
0 2 4 6 8 10 12 14 16 18 20 22 24
0 10 20 30 40 50 60 70 80 90 10
6V
PWM = 200Hz
6V
TPWM = 200Hz
Ta=-50,+25,+125℃
-30 ℃
Ta=-50,+25,+125℃
12V
25 ℃
12V
Ta [
Duty (%)
VBAT [V]
Duty (%)
25
o
C]
16V
16V
85 ℃
110
125
0
0
Fig.5 Efficiency vs PWMPOW-HI Duty
Fig.11 LED current vs PWMPOW-HI Duty
Fig.8 LED current vs PWMDRV-HI Duty
100%
95%
90%
85%
80%
75%
70%
65%
60%
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
8
7
6
5
4
3
2
1
0
( Expansion)
ISETH=24kΩ, PWM=200Hz
Fig.2 Quiescent current vs VBAT
0
2
( Expansion) PWM = 200Hz
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
10 20 30 40 50 60 70 80 90 100
4
6V
6
6V
6V
8
Ta=-50,+25,+125℃
Ta=-50,+25,+125℃
12V
12V
Duty [%]
10 12 14 16 18 20 22
3/26
Duty (%)
VBAT[V]
25 ℃
Duty (%)
12V
16V
PWM = 200Hz
16V
125℃
16V
-60℃
Fig.12 LED current vs PWMPOW-HI Duty
Fig.9 LED current vs PWMDRV-HI Duty
Fig.3 Oscillation frequency vs VBAT
Fig.6 Efficiency vs PWMDRV-HI Duty
100%
1.15
1.05
0.95
0.85
95%
90%
85%
80%
75%
70%
65%
60%
1.2
1.1
0.9
0.8
20
18
16
14
12
10
PWM = 200Hz, 1kHz,10kHz
20
18
16
14
12
10
ISETH=24kΩ, PWM=200Hz
8
6
4
2
0
1
8
6
4
2
0
2
0
0 10 20 30 40 50 60 70 80 90 100
PWM = 200Hz, 1kHz,10kHz
0 10 20 30 40 50 60 70 80 90 10
10 20 30 40 50 60 70 80 90 100
6V
7
125
200Hz
2010.03 - Rev.A
Technical Note
o
VBAT [V]
C
200Hz
Duty [%]
12V
Duty (%)
Duty (%)
12
1kHz
-60 ℃
25 ℃
1kHz
16V
10kHz
17
10kHz
22
0