BD6067GU_11 ROHM [Rohm], BD6067GU_11 Datasheet - Page 19

• Manufacturer Part Number: BD6067GU_11
• Description: White Backlight LED Drivers for Small to Medium LCD Panels (Switching Regulator Type)
• Manufacturer: ROHM [Rohm]

© 2011 ROHM Co., Ltd. All rights reserved.
BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
►BD6069GUT, BD6072HFN
●Electrical characteristic curves (Reference data)
www.rohm.com
< 4LED > (VOUT=14V, VIN=3.6V, Ta=25℃)
< 3LED > (VOUT=10.5V, VIN=3.6V, Ta=25℃)
0.53
0.52
0.51
0.49
0.48
0.47
5.0
4.0
3.0
2.0
1.0
0.0
0.5
90
85
80
75
70
65
60
90
85
80
75
70
65
60
Fig.50 Current Consumption vs
Fig.59 Feedback voltage vs.
2.5
10
10
2.5
LED current in each coil
Power source voltage
LED current in each coil
Power source voltage
TDK:VLF3012AT-220MR33
Fig.56 Efficiency vs.
15
15
Fig.53 Efficiency vs.
3
3
TDK:VLCF4020T-220MR56
VIN=3.1V
(ILED=20mA)
MURATA:LQH32CN220K53
3.5
20
20
3.5
ILED [mA]
VIN=3.6V
CoilCraft : DO1608C-223
Ta=25 ℃
ILED [mA]
Vin [V]
VIN [V]
25
25
4
4
Ta=25 ℃
Ta=-30 ℃
Ta=85 ℃
VIN=4.2V
Ta=85 ℃
4.5
30
4.5
30
Ta=-30 ℃
VIN=5.5V
35
35
5
5
5.5
40
40
5.5
430
410
390
370
350
330
310
290
270
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
< 4LED > (VOUT=14V, VIN=3.6V, Ta=25℃)
90
85
80
75
70
65
60
Fig.57 Inductor current limits vs.
Fig.60 LED Open output voltage
2.5
-30
10
Fig.51 Quiescent current vs
IIN
200mA/div
VOUT
1V/div
LED current in each coil
TDK:VLF3012AT-220MR33
power source voltage
15
-10
3
Fig.54 Efficiency vs.
TDK:VLCF4020T-220MR56
MURATA:LQH32CN220K53
Ave IIN =1.5mA
VIN=3.6V
Temperature
3.5
CoilCraft : DO1608C-223
VIN=3.1V
20
Temparature [ ℃ ]
19/29
10
ILED [mA]
VIN [V]
Ta=-30, 25, 85 ℃
10ms
25
4
30
VIN=5.5V
⊿ V=1.57V
4.5
30
50
( 4ms/div )
35
5
70
5.5
85
40
2000
1500
1000
( VIN = 3.6V, Ta = 25℃, 3LED, 20mA Load )
< 3LED > (VOUT=10.5V, VIN=3.6V, Ta=25℃)
Fig.61 LED luminance adjustment
500
1.4
1.3
1.2
1.1
0.9
0.8
0.7
0.6
90
85
80
75
70
65
60
0
1
2.5
2.5
10
Fig.52 Oscillation frequency vs.
ILED
20mA/div
EN
2V/div
IIN
200mA/div
VOUT
5V/div
Fig.55 Efficiency vs. LED
Fig.58 Output power vs.
Power source voltage
15
3
current in each coil
power source voltage
VIN=3.1V
3
3.5
20
VIN=3.6V
Ta=25 ℃
ILED [mA]
Ta=-30 ℃
VIN [V]
VIN [V]
2011.01 - Rev.C
Technical Note
3.5
25
VIN=4.5V
4
Ta=85 ℃
VIN=5.5V
Ta=-30 ℃
4.5
30
Ta=25 ℃
( 4ms/div )
Ta=85 ℃
4
35
5
4.5
5.5
40