BD6581GU-E2 Rohm Semiconductor, BD6581GU-E2 Datasheet - Page 4

• Manufacturer Part Number: BD6581GU-E2
• Description: IC LED DVR WHT BCKLGHT VCSP85H2
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of BD6581GU-E2

• Constant Current: -
• Constant Voltage: -
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.2MHz
• Voltage - Supply: 2.7 V ~ 22 V
• Voltage - Output: 44.7 V
• Mounting Type: *
• Package / Case: *
• Operating Temperature: -30°C ~ 85°C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BD6581GU
© 2010 ROHM Co., Ltd. All rights reserved.
www.rohm.com
Fig.19 LED current vs Temperature
VOUT
-1.0
-2.0
-3.0
Fig.13 LED current matching vs
3.0
2.0
1.0
0.0
Icc
Fig.16 LED current matching vs
-1.0
-2.0
-3.0
0%
3.0
2.0
1.0
0.0
PWMDRV=H, ISETH=30kΩ
16.30
16.25
16.20
16.15
16.10
16.05
16.00
15.95
15.90
15.85
15.80
15.75
15.70
0%
Min Matching = Min LED Current/Average Current
Max Matching = Max LED Current/Average Current
PWMDRV-HI Duty
PWMPOW-HI Duty
-60 -40 -20 0 20 40 60 80 100 120
20%
Min Matching = Min LED Current/Average Current
Max Matching = Max LED Current/Average Current
PWM = 200Hz
Fig.22 VOUT@OVP
PWM = 200Hz
20%
(16mA setting)
PWM HI Duty (%)
5V
(LED OPEN)
2.7V
40%
PWM HI Duty (%)
40%
7V
temp [oC]
60%
12V
[ ℃ ]
60%
80%
22V
80%
100%
100%
LED current
Fig.20 Line Transient (10V to 22V)
VOUT
VBAT
Fig.14 LED current matching vs
(Expansion)
Fig.17 LED current matching vs
-1.0
-2.0
-3.0
(Expansion)
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
3.0
2.0
1.0
0.0
0%
0%
PWMDRV-HI Duty
PWMPOW-HI Duty
Min Matching = Min LED Current/Average Current
Max Matching = Max LED Current/Average Current
Min Matching = Min LED Current/Average Current
Max Matching = Max LED Current/Average Current
400 μ s
No peak
2%
2%
PWM HI Duty (%)
PWM HI Duty (%)
4/26
4%
4%
PWM = 200Hz
PWM = 200Hz
6%
6%
8%
8%
10%
10%
Fig.21 Line Transient (22V to 10V)
LED Current
LED current
LED Current
PWMPOW
PWMDRV
VBAT
VOUT
VOUT
Power Control PWM (PWMPOW)
VOUT
Driver Control PWM (PWMDRV)
Fig.18 VOUT response
Fig.15 VOUT response
No peak
350mV
180mV
2010.03 - Rev.A
Technical Note
10mA/div
10mA/div
14ms