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BD1604MVV-E2

P1-P3P4-P6P7-P9P10-P11
1/10
www.rohm.com
2011.06 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
LED Drivers for LCD Backlights
Backlight LED Drivers
for Small LCD Panels (Charge Pump Type)
BD1604MUV, BD1604MVV
●Description
This LSI is a 4 white LED driver for small LCD backlight. At the charge pump type, the number of external devices is
minimized.
●Features
1) 4 parallel LED driver is mounted.
2) The LED current can be controlled via an external resistance.
3) Maximum current is 120mA (30mA × 4).
4) LED1 to LED4 can be turned on or off via an external control pin.
5) The relative current accuracy among LEDs (LED1 to LED4) is 3%.
6) Automatically transition to each mode (×1.0, ×1.5, ×2.0).
7) High efficiency (90% or more at maximum) is achieved.
8) Various protection functions such as output voltage protection function, current overload limiter and thermal shutdown
circuit are mounted.
●Applications
This driver provides for:
- Backlight using white LED
- Auxiliary lights for mobile phone cameras and simplified flash
●Lineup
Parameter BD1604MUV BD1604MVV
Number of LED channels 4ch 4ch
Maximum current 120mA 120mA
Package
VQFN016V3030
3.00mm×3.00mm
SQFN016V4040
4.00mm×4.00mm
●Absolute Maximum Rating (Ta=25℃)
Parameter Symbol Ratings Unit
Power supply voltage Vmax 7 V
Allowable loss
BD1604MUV
Pd
700 *
1
mW
BD1604MVV 780 *
2
Operating temperature range Topr －30~85 ℃
Storage temperature range Tstr －55~150 ℃
*1 When a glass epoxy substrate (70mm×70mm×1.6mm) has been mounted, this loss will decrease 5.6mW/℃ if Ta is higher than or equal to 25℃.
*2 When a glass epoxy substrate (70mm×70mm×1.6mm) has been mounted, this loss will decrease 6.24mW/℃ if Ta is higher than or equal to 25℃.
●Recommended Operation Range
Parameter Symbol Limits Unit Condition
Operating supply voltage VBAT 2.7～5.5 V VBAT voltage
No.11040EBT23
Technical Note
2/10
www.rohm.com
2011.06 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
BD1604MUV, BD1604MVV
●Electrical Characteristics
Unless otherwise specified, Ta is 25℃ and VBAT is 3.6V.
Parameter Symbol
Limits
Unit Condition
Min. Typ. Max.
[Circuit current]
Circuit current 0 IQ0 - 0.1 1 μA EN=0V
Circuit current 1.0 IQ1.0 - 1.0 2.0 mA x1.0 Mode, Iout = 0mA
Circuit current 1.5 IQ1.5 - 2.3 3.3 mA x1.5 Mode, Iout = 0mA
Circuit current 2.0 IQ2.0 - 2.5 3.5 mA X2.0 Mode, Iout = 0mA
Unless otherwise specified, Ta is 25℃ and VBAT is 3.6V.
Parameter Symbol
Limits
Unit Condition
Min. Typ. Max.
[Current driver]
LED maximum current ILEDmax - - 30 mA
LED current accuracy ILEDdiff - 0.5 5.0 % ILED=10mA
LED current matching ILEDmatch - 0.5 3.0 % ILED=10mA *1)
LED pin control voltage VLED 0.08 0.10 0.20 V
Minimum voltage
at LED1~LED4 pins
ISET voltage ISET 0.5 0.6 0.7 V
Oscillation frequency Fosc 0.8 1.0 1.2 MHz
Over current limiter IOV - 600 900 mA
LED current limiter ILEDOV 40 60 100 mA
*1) LED current matching = (ILEDmax-ILEDmin)/(ILEDmax+ILEDmin)*100
ILEDmax : Maximum value of LED1-4 current
ILEDmin : Minimum value of LED1-4 current
Unless otherwise specified, Ta is 25℃ and VBAT is 5.5V.
Parameter Symbol
Limits
Unit Condition
Min. Typ. Max.
[Control Signal etc.]
Input ’H’ voltage VIH 1.4 - - V EN,SEL0,SEL1,SEL2
Input ’L’ voltage VIL - - 0.4 V EN,SEL0,SEL1,SEL2
Input ‘H’ current1 IIH1 - 18.3 30 μA EN=5.5V
Input ‘H’ current2 IIH2 - 0 1 μA SEL0,SEL1,SEL2=5.5V
Input ‘L’ current IIL -1 0 - μA EN,SEL0,SEL1,SEL2=0V
Unless otherwise specified, Ta is 25℃ and VBAT is 3.6V.
Parameter Symbol
Limits
Unit Condition
Min. Typ. Max.
[Control Signal etc.]
UVLO detecting voltage VUVLO 1.9 2.2 2.5 V
Technical Note
3/10
www.rohm.com
2011.06 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
BD1604MUV, BD1604MVV
●Reference Data (Evaluation under LED V
F
=3.2V)
40
50
60
70
80
90
100
2.533.544.555.5
SUPPLY VOLTAGE : VBAT[V]
EFFICIENCY [%]
DOWN
UP
Fig.1 Circuit Current
(Standby)
Fig.11 LED Current vs. PWM Duty
(Cycle 100Hz)
Fig.2 Circuit Current
(×1.0 Mode Operation)
Fig.3 Efficiency Hysteresis
(20mA × 4 LEDs)
Fig.4 Efficiency
(5mA × 4 LEDs)
Fig.10 LED Current vs. RSET
(Ta=25℃)
Fig.7 LED Current (20mA)
(VBAT=2.7V)
Fig.8 LED Current (20mA)
(VBAT=3.6V)
Fig.9 LED Current (20mA)
(VBAT=5.5V)
Fig.6 Efficiency
(20mA × 4 LEDs)
Fig.5 Efficiency
(15mA × 4 LEDs)
0
5
10
15
20
25
0 20406080100
PWM DUTY[%]
ILED [mA]
0
5
10
15
20
25
30
35
0 50 100 150 200
RSET[kO]
ILED [mA]
0
0.1
0.2
0.3
0.4
0.5
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE : VBAT[V]
STAND-BY Current : Istb [µA]
Ta=25℃
Ta=85
℃
Ta=-30
℃
0
5
10
15
20
25
0 0.3 0.6 0.9 1.2
LED VOLTAGE : VLED[V]
LED CURRENT : ILED [mA]
Ta=85℃
Ta=25
℃
Ta=-30
℃
40
50
60
70
80
90
100
2.533.544.555.5
SUPPLY VOLTAGE : VBAT[V]
EFFICIENCY [%]
Ta=85℃
Ta=25
℃
Ta=-30
℃
40
50
60
70
80
90
100
2.533.544.555.5
SUPPLY VOLTAGE : VBAT[V]
EFFICIENCY [%]
Ta=85℃
Ta=25
℃
Ta=-30
℃
40
50
60
70
80
90
100
2.533.544.555.5
SUPPLY VOLTAGE : VBAT[V]
EFFICIENCY [%]
Ta=85℃
Ta=25
℃
Ta=-30
℃
0
5
10
15
20
25
0 0.3 0.6 0.9 1.2
LED VOLTAGE : VLED[V]
LED CURRENT : ILED [mA]
Ta=85℃
Ta=25
℃
Ta=-30
℃
0
5
10
15
20
25
0 0.3 0.6 0.9 1.2
LED VOLTAGE : VLED[V]
LED CURRENT : ILED [mA]
Ta=85℃
Ta=25
℃
Ta=-30
℃
0
0.5
1
1.5
2
012345
INPUT VOLTAGE : VBAT[V]
Current Consumption : IQ1.0 [µA]
Ta=85℃
Ta=25
℃
Ta=-30
℃
P1-P3P4-P6P7-P9P10-P11

BD1604MVV-E2

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Description:
LED Lighting Drivers Backlight LED Driver for Small Panel
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