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Datasheet
4-Channel White LED Driver
with Integrated FET for up to 40 LEDs
BD65D00MUV
General Description
This IC is white LED driver IC with PWM step-up
DC/DC converter that can boost max 41V and current
driver that can drive max 100mA. The wide and
precision brightness can be controlled by external
PWM pulse. This IC 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
panel. Small package is suited for saving space.
It can respond to the application according to the
application to be abele to switch to external/internal
NchFET boosting.
PWM dimming(100Hz - 25kHz)Analog
Brightness Control
Key Specifications
Operating power supply voltage range: 6V to 27V
LED maximum current:
100mA/ch
Quiescent Current:
1.6μA (typ.)
Operating temperature range:
-40 to +85
Package
W(typ.) x D(typ.) x H(Max.)
Features
High efficiency PWM step-up DC/DC converter
(fsw=typ 1.25MHz, 0.60MHz to 1.6MHz)
High accuracy & good matching current drivers
4ch (MAX100mA/ch)
Integrated 50V power Nch MOSFET
Soft Start function
Drive up to 10 LEDs in series,
4 strings in parallel
Various safety functions
Over-voltage protection
External SBD open detect / Output
Short protection
Over current limit
CH Terminal open / GND short protect
CH over voltage protect / LED short protect
Thermal shutdown
UVLO
ISET short protection
Typical Application Circuit (4 parallel)
6V to 27V
VQFN028V5050
5.00mm x 5.00mm x 1.00mm
Figure 1.
Applications
All LCD equipments, Backlight of Notebook PC,
Amusement, net book, monitor, TV, Portable DVD
player, light source etc.
Figure 2. Typical Application Circuit
Product structure Silicon monolithic integrated circuit
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
This product is not designed protection against radioactive rays
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TSZ02201-0G3G0C400220-1-2
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BD65D00MUV
Datasheet
Absolute Maximum Ratings (Ta=25 )
Parameter
Symbol
Ratings
Unit
Conditions
Terminal voltage 1
VMAX1
7
V
VDC, ISET, ABC, COMP, FSET, TEST,
FAULT, PREOUT, TRIN, SENSP
Terminal voltage 2
VMAX2
45
V CH1 to CH4, LX, OVP
Terminal voltage 3
VMAX3
30.5
V VIN, ENABLE
Terminal voltage 4
Power dissipation 1
Power dissipation 2
Power dissipation 3
VMAX4
Pd1
Pd2
Pd3
15
380 *1
880 *2
3264 *3
V PWM
mW
mW
mW
Operating temperature range
Topr
-40 to +85
Storage temperature range
Tstg
-55 to +150
*1 Reduced 3.0mW/ 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 7.0mW/
*3 4 layer (JEDEC Compliant board) has been mounted. Copper foil area 1.4layer 20.2mm2, Copper foil area 2 to 3layers 5505mm2,
When it’s used by more than Ta=25 , it’s reduced by 26.1mW/ .
Power dissipation is calculated by formula : (Storage temperature max - 25 )/ ja (ex. Pd1=3.0mW/ )
.
Recommended Operating Ratings (Ta=-40 to +85 )
Parameter
Power supply voltage
Symbol
VINL
VIN
Min.
6.0
4.5
Limits
Typ.
12.0
5
Max.
27.0
27.0
Unit Conditions
V Coil power supply
V IC power supply
Electrical Characteristics
(Unless otherwise specified, VIN=12V, Ta = +25 )
Parameter
[General]
Quiescent Current
Current Consumption
Max. Output Voltage
Under Voltage Lock Out
[ENABLE Terminal]
Low Level Input Voltage
High Level Input Voltage 1
ENABLE Pull down resistor
Output Current
[PWM Terminal]
Low Level Input Voltage
High Level Input Voltage 2
PWM Pull down resistor
Output Current
[FAULT]
Nch RON
[Regulator]
VDC Voltage
Symbol
Min.
Iq
Idd
MOV
UVLO
-
-
-
-
EnL
EnH
EnR
ENIout
0.0
2.0
100
-
PWML
PWMH
PWMR
PWMIout
0.0
1.3
100
-
FFCR
-
VREG
4.2
Limits
Typ.
1.6
3.6
-
3.7
-
-
300
0
-
-
300
0
-
5.0
Max.
Unit Conditions
4.4 µA ENABLE=0V
5.4 mA OVP=0V,ISET=39k
41 V
4.1 V VIN falling edge
0.8 V
VIN V
500 kENABLE =3V
2 µA ENABLE=0V
0.8 V
14.5 V
500 kPWM=3V
2 µA PWM=0V
3 kENABLE=PWM=3V, OVP=2V
6.0 V No load, VIN > 6V
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
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BD65D00MUV
Electrical Characteristics - continued
(Unless otherwise specified, VIN=12V, Ta = +25 )
Parameter
Symbol
[Switching Regulator]
LED Control voltage
Switching frequency accuracy
Duty cycle limit
LX Nch FET RON
[Protection]
Over Current Limit
Over voltage limit Input
Output Short Protect
OVP leak current
CH Terminal
Over Voltage Protect accuracy
[Current driver]
VLED
Fsw
Duty
RON
Ocp
OVP
OVPfault
OVIL
VSC
Min.
0.64
1.00
91.0
-
1.5
1.16
0.02
-
-15
LED maximum current
ILMAX
-
LED current accuracy
LED current matching
ILACCU
ILMAT
-
-
LED current limiter
ILOCP
ISET voltage
Iset
LED current accuracy2
ILACCU2
*1 This parameter is tested with DC measurement.
Block Diagram
-
-
-
Limits
Typ.
0.80
1.25
95.0
0.3
2.5
1.20
0.05
0.1
0
-
-
-
0
0.733
±3.0
Datasheet
Max.
Unit Conditions
0.96 V
1.50 MHz FSET=56k
99.0 % CH1-4=0.3V, FSET=56k
0.5 ILX=80mA
- A *1
1.24 V Detect voltage of OVP pin
0.08 V Detect voltage of OVP pin
1.0 µA
+15 % VSC=8V
This is current driver’s
100
mA
characteristics.
This IC may not output current
according to application.
±5.0 % ILED=60mA (39k)
(Max LED current – Min LED
3.0 % current)/ Ideal current (60mA)
ILED=60mA
0.1
mA
Current limit value at ISET
Resistance 1ksetting
-V
- % ILED=60mA, ABC=0.733V
Sense
CurrentSense
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
Pin number 22pin
Figure 3. Block Diagram
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BD65D00MUV
Pin Descriptions
PIN No. PIN Name IO
Function
1
VDC
Out Regulator output / Internal power-supply
2
TEST
In TEST signal (Pull down 100kwithin IC)
3
FSET
In Resistor connection for frequency setting
4
ABC
In PIN for Analog Brightness Control
5
GND
- GND for Switching Regulator
6
COMP
Out ERRAMP output
7
ISET
In Resistor connection for LED current setting
8
CH4
In Current driver sink for CH4
9 NC - -
10
CH3
In Current driver sink for CH3
11 NC - -
12
CH2
In Current driver sink for CH2
13 NC - -
14
CH1
In Current driver sink for CH1
15 NC - -
16
GND
- GND for Current Driver
17
FAULT
Out Fault signal
18 PREOUT Out Signal output pin for internal switching Tr
19
TRIN
In Gate terminal for switching Tr
20
SENSP
In Source terminal for external switching Tr
21
PGND
- PGND for switching Tr
22 LX
Out Switching Tr drive terminal
23 LX
24 NC - -
25
OVP
In Detect input for SBD open and OVP
26
PWM
In Input pin for current driver power ON/OFF
27
ENABLE
In Pin for power ON/OFF or Power control
28 VIN In Battery input
-
Thermal PAD
-
Heat radiation PAD of back side
Connect to GND
Pin ESD Type
VDC
Terminal
diagram
C
E
A
C
B
A
A
C
-
C
-
C
-
C
-
B
C
A
A
A
D
F
-
C
E
E
G
Datasheet
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
Figure 4. Pin ESD Type
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BD65D00MUV
Typical Performance Curves
Datasheet
Figure 5. Quiescent Current
Figure 6. Current Consumption
Figure 7. VDC Voltage
Figure 8. Under Voltage Lock Out
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
5/36
TSZ02201-0G3G0C400220-1-2
7.Dec.2012 Rev.001