BD6067GU-E2 Rohm Semiconductor, BD6067GU-E2 Datasheet - Page 23

• Manufacturer Part Number: BD6067GU-E2
• Description: IC LED DRIVR WHITE BCKLGT 8-VCSP
• Manufacturer: Rohm Semiconductor
• Type: Backlight, White LEDr

Specifications of BD6067GU-E2

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.2MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 30V
• Mounting Type: Surface Mount
• Package / Case: 8-VCSP
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Led Driver Application: Mobile Phones
• No. Of Outputs: 1
• Output Current: 30mA
• Output Voltage: 36V
• Input Voltage: 2.7V To 5.5V
• Operating Temperature Range: -30°C To +85°C
• Driver: RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details
• Other names: BD6067GU-E2TR

© 2011 ROHM Co., Ltd. All rights reserved.
BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
►BD6069GUT, BD6072HFN
●Setting range of LED current
www.rohm.com
2-2) The brightness adjustment of below is done in adjusting of R2 ON time by R1 and Duty cycle of PWM.
LED current is determined by the voltage of VFB
and the resistor connected to VFB terminal.
I
The current in the standard application is as shown below.
The shaded portion in the figure below is the setting range of LED current to become the standard. Depending on coils and
white LEDs to be used, however, some ICs may not be used at desired currents. Consequently, for the proper setting of LED
current, thoroughly check it for the suitability under use conditions including applicable power supply voltage and
temperature.
LED
The minimum value of the LED current is decided by VFB / R1 at the PWM 0%, the maximum value of the LED current is
decided by VFB / R2 at the PWM 100%.
I
Standard PWM frequency is 100Hz~1kHz. And please don’t use duty less than 5% or more than 95% of current setting for
the brightness adjustment.
LED
is given as shown below.
VIN
I
V
I
is given as shown below.
LED
LED
FB
ILED=VFB / R1 + VFB / R2 × HI Duty
=0.5V, R
=V
=20.8mA
FB
/R
Fig.72 he brightness adjustment example of
VFB terminal by PWM (f
FB
FB
=24Ω
VIN
TEST
EN
GNDA
GND
22µH
VOUT
PWM
1kHz
VFB
SW
PWM
Fig.75 Setting range of LED current
=100Hz~1kHz)
80
70
60
50
40
30
20
10
0
7
47Ω
R2
8
1µF
9 10 11 12 13 14 15 16 17 18
23/29
47Ω
R1
VOUT[V]
VIN
PWM
1µF
Fig.74 Recommended circuit diagram
VIN
EN
TEST
GNDA
25
20
15
10
5
0
0
Fig.73 VFB PWM Control
10 20 30 40 50 60 70 80 90 100
GND
22µH
HI Duty [%]
VOUT
VFB
SW
1µF
2011.01 - Rev.C
Technical Note
RFB
24Ω
ILED