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Rohm Semiconductor Electronic Components Datasheet

BD6072HFN Datasheet

White Backlight LED Drivers

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BD6067GU
LED Drivers for LCD Backlights
White Backlight LED Drivers
for Small to Medium LCD Panels
(Switching Regulator Type)
BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
No.11040ECT19
Description
Switching Regulator type LED Driver Series for small LCD backlight are boost DC/DC converters possible to drive the white
LEDs at constant. It is possible that turning on white LED steadily by a series connection which has no current variation, and
by a fast transient response with current mode. And, BD6069GUT/BD6071HFN/BD6072HFN are white LED driver ICs with
synchronous rectification. With synchronous rectification (no external schottky diode required) and small package, they can
save mount space. BD6071HFN suited over voltage and over current limit from BD6069GUT/BD6072HFN.
Features
1) Boost DC/DC converter
2) Adjustment of brightness by external PWM pulse
3) Possible to driving 3 LEDs (BD6071HFN )
4) Possible to driving 4 LEDs (BD6069GUT, BD6072HFN)
5) Possible to driving 8 LEDs (BD6067GU)
6) Soft start function (BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN)
7) Synchronous rectification Boost DC/DC converter (BD6069GUT, BD6071HFN, BD6072HFN)
8) No external schottky diode required (BD6069GUT, BD6071HFN, BD6072HFN)
9) Output Open • Short protect (BD6069GUT, BD6071HFN, BD6072HFN)
Applications
These drivers are applicable for various fields such as mobile phones, portable game machines, Inter-phone camera,
audio player, portable DVD player, back light for printer display etc… and support light of the camera for the mobile phone,
simple flash. And, these can use power supply for OEL.
Line up matrix
Parameter
BD6067GU
BD6069GUT
BD6071HFN
BD6072HFN
Input
voltage range
2.7 ~ 5.5V
2.7 ~ 5.5V
2.7 ~ 5.5V
2.7 ~ 5.5V
Switching
frequency
0.8 ~ 1.2MHz
0.8 ~ 1.2MHz
0.8 ~ 1.2MHz
0.8 ~ 1.2MHz
White LED
number
5~8
4
3
4
Operating
temperature range
-30 ~ +85
-30 ~ +85
-30 ~ +85
-30 ~ +85
Package
VCSP85H1
VCSP60N1
HSON8
HSON8
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/29
2011.01 - Rev.C


Rohm Semiconductor Electronic Components Datasheet

BD6072HFN Datasheet

White Backlight LED Drivers

No Preview Available !

BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
BD6067GU
Absolute maximum ratings (Ta=25)
Parameter
Symbol
Power supply voltage 1
VMAX1
Power supply voltage 2
VMAX2
Ratings
7 *1
40 *1
Operating temperature range Topr
-30 ~ +85
Storage temperature range
Tstg
-55 ~ +150
Power dissipation
Pd
800 *2
*1 This value is based on GND.
*2 This loss decreases approximate 6.4mW/when Ta is 25or more.
Recommended Operation Range (Ta=-30to +85)
Parameter
Symbol
Ratings
Operating supply voltage
VCC
2.7 ~ 5.5
Technical Note
Unit Conditions
V
Applicable to Vin, EN,
Vfb and VDAC pins
V Applicable to SW and Vout pins
mW
50mm×58mm×1.75mm
Glass epoxy PCB mounting
Unit Conditions
V Vin pin
Electrical characteristics (Unless otherwise stated, Ta is 25and Vin is 3.6V.)
Parameter
Symbol
Min.
Limits
Min.
Min.
<EN pin>
‘L’ level input voltage
VthL
-
- 0.4
Unit
V
Conditions
‘H level input voltage
VthH
1.4
-
-V
‘H’ level input current
IIH - 18.3 30.0 μA EN=5.5V
‘L’ level input current
<DAC control pin>
VDAC-Vfb resistance
<Switching regulator>
Input voltage range
IIL -2.0 -0.1
- μA EN=0V
VDAR 56 112 168 k
Vin 3.1 - 5.5 V
Quiescent current
Iq - 0.1 2.0 μA EN=0V
Operating current
Idd - 0.9 1.4 mA EN=3.6V, Vfb=1.0V
VFB pin control voltage
Over current limit
Vfb 0.18 0.20 0.22 V
Icoil 450 600 750 mA *1
SW transistor ON resistance Ronn
-
0.5 1.4 Isw=200mA
Switching frequency
fSW 0.8 1.0 1.2 MHz
Maximum duty
Duty 92.5 95.0 - % Vfb=0V
Output voltage range
Vo -
- 30.0 V
Over voltage protection
Ovp 30.0 31.0 32.0 V Vfb=0V
Output open protection
Ovl - 0.7 1.4 V
Startup time
Ts
*1 The DC current is measured in this item.
- 0.5 1.0 ms Vout=24V
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2/29
2011.01 - Rev.C


Part Number BD6072HFN
Description White Backlight LED Drivers
Maker Rohm
Total Page 30 Pages
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