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Rohm Semiconductor Electronic Components Datasheet

BD6077GUT Datasheet

White Backlight LED Drivers

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BD6077GUT
LED Drivers for LCD Backlights
White Backlight LED Drivers
for Small to Medium LCD Panels
(Switching Regulator Type)
BD6077GUT
No.11040EAT41
Description
The BD6077GUT is a white LED driver IC with synchronous rectification that can drive up to 3LEDs.
With synchronous rectification (no external schottky diode required) and small package, they can save mount space.
And the brightness of LED can be adjusted by using PWM pulse on EN pin.
Features
1) Synchronous rectification Boost DC/DC converter
2) No external schottky diode required
3) Driving 3 series white LEDs
4) Over voltage protection
5) Protect open and short output
6) Thermal shut down
7) Brightness adjustment by external PWM pulse
8) Small and Thin CSP package in 8pins
Applications
White LED Backlight
Torchlight and easy flash for camera of mobile phone
Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Maximum applied voltage 1
VMAX1
Maximum applied voltage 2
VMAX2
Power dissipation
Pd
Ratings
7 *1
20 *1
750 *2
Unit Condition
V Vin, EN, VFB, TEST
V SW, Vout
mW
Operating temperature range
Topr
-30~+85
Storage temperature range
Tstg
-55~+150
*1 These value are based on GND and GNDA pins.
*2 50mm×58mm×1.75mm At glass epoxy board mounting. When it’s used by more than Ta=25 , it’s reduced by 6.0mW/.
Operating conditions (Ta=25°C)
Parameter
Power supply voltage
Symbol
Vin
Ratings
Min. Typ. Max.
2.7 3.6 5.5
Unit
V
Condition
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/16
2011.12 - Rev.A


Rohm Semiconductor Electronic Components Datasheet

BD6077GUT Datasheet

White Backlight LED Drivers

No Preview Available !

BD6077GUT
Technical Note
Electrical characteristics
Unless otherwise specified Ta =-30~+85, Vin=3.1~5.5V
Parameter
Limits
Symbol
Min. Typ.
[ EN terminal ]
EN threshold voltage (Low)
VthL
-
-
Max.
0.4
Unit
V
Condition
EN threshold voltage (High)
VthH
1.4
-
-
V
EN terminal input current
Iin - 18.3 30.0 µA EN=5.5V
EN terminal output current
[ Switching regulator ]
Quiescent Current
Current Consumption
Feedback voltage
Inductor current limit
SW saturation voltage
Iout -2.0 -0.1
-
µA EN=0
Iq
Idd
Vfb
Icoil
Vsat
- 0.1 2.0
- 1.0 1.5
0.47 0.50 0.53
210 310 410
- 0.245 0.345
µA EN=TEST=VFB=0V,SW=open
mA
EN=1.4V,TEST=0V,VFB=1.0V,
SW=open
V EN=1.4V,TEST=0V
mA
EN=1.2V, TEST=2.9V,
Vin=3.6V,VOUT=9V (*1)
V Isw=200mA, Vin=3.6V
SW on resistance P
Ronp
Switching frequency
fSW
Duty cycle limit
Duty
Over voltage limit
Ovl
1 This parameter is tested with DC measurement.
- 5.4 7.2 Isw=200mA, Vout=10V
0.8
1.0
1.2
MHz
EN=1.4V,TEST=0V,VFB=0V,
VOUT=10V,SW=open
82.7 95.0
-
%
EN=1.4V,TEST=0V,VFB=0V,
VOUT=10V,SW=open
14.0 14.5 15.0
V
EN=1.4V,TEST=0V,VFB=0V,
SW=open
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2/16
2011.12 - Rev.A


Part Number BD6077GUT
Description White Backlight LED Drivers
Maker ROHM
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