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Rohm Semiconductor Electronic Components Datasheet

BD6586MUV Datasheet

4-Channel White LED Driver

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Datasheet
4-Channel White LED Driver
with Integrated FET for up to 24 LEDs
BD6586MUV
General Description
BD6586MUV is white LED driver IC with PWM step-up
DC/DC converter that can boost max 24V and current
driver that can drive max 25mA. The wide and
precision brightness can be controlled by external
PWM pulse.
BD6586MUV has very accurate current drivers, and it
has few current errors between each strings. So, it will
be helpful to reduce brightness spots on the LCD.
Small package type is suited for saving space.
Key Specifications
Operating power supply voltage range: 2.7V to 5.5V
LED maximum current:
25mA (Max.)
Quiescent Current:
0.1μA (Typ.)
Switching frequency:
1.0MHz(Typ.)
Operating temperature range:
-40 to +85
Package W(Typ.) x D(Typ.) x H(Max.)
Features
High accuracy & good matching (±3.0%) current
drivers 4ch (MAX.25mA/ch)
28V power Nch MOSFET
Soft Start
Drive up to 6 in series, 4 strings in parallel
Rich safety functions
Over-voltage protection
Output Short protection
External SBD open detect
Over current limit
Thermal shutdown
UVLO
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
Figure 1.
Typical Application Circuit
Battery
2.7V to 5.5V
Applications
All middle size LCD equipments backlight of Notebook
PC, portable DVD player, car navigation systems, etc.
4 .7μ F
4. 7μ H
2. 2μF
1 μF
6LED x 4Parallel
1 00H z~1 kHz
PWM
SW SW SW
TRSW
VBAT VDET
EN2
EN1
PWM
TESTO
TEST PGND PGND GND
GND GND
L ED 1
LED2
L ED 3
L ED 4
ISET
2 4k
Each 20mA
Can be set up to each 10~25mA
Figure 2. Typical Application Circuit
(Power control PWM application)
Product structure Silicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
This product is not designed protection against radioactive rays
1/20
TSZ02201-0G3G0C400190-1-2
10.Dec.2012 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD6586MUV Datasheet

4-Channel White LED Driver

No Preview Available !

BD6586MUV
Datasheet
Absolute Maximum Ratings (Ta=25 )
Parameter
Terminal voltage 1
Terminal voltage 2
Symbol
VMAX1
VMAX2
Ratings
7
25
Unit Condition
V
VBAT, EN1, EN2, TRSW,
PWM,TESTO, ISET, TEST
V LED1, LED2, LED3, LED4,
Terminal voltage 3
VMAX3
30.5
V SW
Terminal voltage 4
Power dissipation 1
Power dissipation 2
Power dissipation 3
VMAX4
Pd1
Pd2
Pd3
50.5
500 *1
780 *2
1510 *3
V VDET
mW
mW
mW
Operating temperature range Topr
-40 to +85
Storage temperature range
Tstg
-55 to +150
*1 Reduced 4.0mW/ With Ta>25 when not mounted on a heat radiation Board.
*2 1 layer (ROHM Standard board) has been mounted. Copper foil area 0mm2, When it’s used by more than Ta=25 , it’s reduced by 6.2mW/ .
*3 4 layer (JEDEC Compliant board) has been mounted.
Copper foil area 1layer 6.28mm2, Copper foil area 2 to 4layers 5655.04mm2, When it’s used by more than Ta=25 , it’s reduced by 12.1mW/ .
Recommended Operating Rating (Ta=-40
Parameter
Symbol
Power supply voltage
VBAT
to +85 )
Limits
Min. Typ.
2.7 3.6
Max.
5.5
Unit
V
Condition
Electrical Characteristics
(Unless otherwise specified, VBAT=3.6V, Ta = +25
Parameter
Symbol
[EN1, EN2, PWM Terminal]
EN threshold voltage (Low)
VthL
EN threshold voltage (High)
VthH
EN terminal input current
Iin
[Under Voltage Lock Out]
Under Voltage Lock Out
UVLO
[Switching Regulator]
Quiescent Current
Iq
Current Consumption
Idd
LED Control voltage
VLED
Over Current Limit
Ocp
SBD Open Protect
Sop
Switching frequency
fSW
Duty cycle limit
Duty
Over voltage limit
Ovl
SW Transistor On Resistance RSW
[Current driver]
LED maximum current
ILMAX
LED current accuracy
ILACCU
LED current matching
ILMAT
ISET voltage
Iset
Min.
0
1.4
-
2.05
-
-
0.4
1.1
-
0.7
91
25.0
-
-
-
-
0.5
)
Limits
Typ.
-
-
8.3
2.35
0.1
2.2
0.5
1.5
-
1.0
95
25.5
0.24
-
-
-
0.6
LED current limiter
ILOCP 35
LED Terminal
Over Voltage Protect
LEDOVP
*1 This parameter is tested with DC measurement.
10.0
60
11.5
Max.
0.4
5.5
16.0
2.65
2.0
4.6
0.6
2.5
0.1
1.3
99
26.0
0.32
25
±5
±3
0.7
90
13.0
Unit Condition
V
V
µA Input=2.5V
V VBAT falling edge
µA
mA
V
A
V
MHz
%
V
EN1=EN2=PWM=0V
VDET=0V,ISET=24k
*1
Detect voltage of VDET pin
LED1-4=0.3V
LED1-4=0.3V
Isw=100mA
mA
% ILED=20mA
%
Each LED current/Average (LED1- 4)
ILED=20mA
V
Current limit value at ISET
mA resistance 4.7ksetting
LED1, 2, 3, 4=0.5V
V EN1=EN2=PWM=2.5V
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
2/20
TSZ02201-0G3G0C400190-1-2
10.Dec.2012 Rev.001


Part Number BD6586MUV
Description 4-Channel White LED Driver
Maker ROHM
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