Power Management IC Series for Automotive Body Control
LED Driver
BD8105FV
No.09039EBT01
●Description
The BD8105FV is a serial parallel control LED driver with 35V input voltage rating.
Responding to the 3-line serial data, it turns the 12ch open drain output on/off.
Due to its compact size, it is optimal for small spaces.
●Features
1) Open Drain Output
2) 3-line Serial Control + Enable Signal
3) Internal Temperature Protection Circuit (TSD)
4) Cascade Connection Compatible
5) SSOP-B20W
6) Internal 12ch Power Transistor
Applications
These ICs can be used with car and consumer electronic.
●Absolute
Maximum Ratings (Ta=25℃)
Item
Power Supply Voltage
Output Voltage（Pin No : 4½9, 11½16）
Input Voltage（Pin No : 1, 2, 3, 17, 18）
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Drive Current (DC)
Drive Current（Pulse）
Junction Temperature
Symbol
VCC
VDmax
VIN
Pd
Topr
Tstg
IomaxD
IomaxP
Tjmax
Value
7
35
-0.3½VCC
1187*
-40½+105
-55½+150
50
150**
150
Unit
V
V
V
mW
℃
℃
mA
mA
℃
* Pd decreased at 9.50mW/℃ for temperatures above Ta=25℃,mounted on 70×70×1.6mm Glass-epoxy PCB.
** Do not however exceed Pd. Time to impress≦200msec
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© 2009 ROHM Co., Ltd. All rights reserved.
1/12
2009.07 - Rev.B
BD8105FV
●Operational
Conditions (Ta=-40~105℃)
Item
Power Supply Voltage
Drive Current
Symbol
Vcc
Io
Standard Value
Min
4.5
-
Typ
5
20
Max
5.5
40
Unit
V
mA
Technical Note
* This product is not designed for protection against radioactive rays.
●Electrical
Characteristics (Unless specified, Ta=-40~105℃ Vcc=4.5½5.5V)
Item
Symbol
Standard Value
Min
Typ
Max
Unit
Conditions
【Output
D0½D11】
（Pin
No : 4½9, 11½16）
ON Resistor
Output leakage current
RON
IDL
-
-
6
0
12
5
Ω
uA
I
D
=20mA
V
D
=34V
【Logic
input】
（Pin
No : 1, 2, 3, 17, 18）
Upper limit threshold voltage
Bottom limit threshold voltage
Serial clock frequency
Input Current
Input leakage Current
【WHOLE】
Circuit Current
ICC
-
0.3
5
mA
Serial Data Input,
VCC=5V,CLK=500KHz,
SEROUT=OPEN
RST_B=OPEN,
SEROUT=OPEN
VTH
VTL
FCLK
IIN
IINL
Vcc
×0.8
-
-
20
-
-
-
-
50
0
-
Vcc
×0.2
1
100
5
V
V
MHz
uA
uA
VIN=5V
VIN=0V
Static Current
【SER
OUT】(Pin No. : 20)
Output Voltage high
Output voltage Low
ISTN
-
0
50
uA
VOH
VOL
4.6
-
4.8
0.2
-
0.4
V
V
VCC=5V, ISO=-5mA
VCC=5V, ISO=5mA
* This product is not designed for protection against radioactive rays.
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© 2009 ROHM Co., Ltd. All rights reserved.
2/12
2009.07 - Rev.B
BD8105FV
●Electrical
Characteristic Diagrams (Unless otherwise specified Ta=25℃)
250
25℃
230
Technical Note
10
OUTPUT RESISTANCE：RON[Ω]
5.5V
SUPPLY CURRENT：Icc[μA]
SUPPLY CURRENT：Icc[μA]
9
8
7
6
5
4
3
2
1
-40℃
25℃
105℃
200
225
5.0V
150
220
105℃
-40℃
4.5V
215
100
50
210
0
0
1
2
3
4
SUPPLY VOLTAGE：Vcc[V]
5
205
-40
-15
10
35
60
85
AMBIENT TEMPERATURE ： Ta[℃]
0
4.5
4.7
4.9
5.1
5.3
SUPPLYVOLTAGE：Vcc[V]
5.5
Fig.1 Circuit current 1
8
OUTPUT ON RESISTANCE ： RON[Ω]
7
6
5
4
3
2
1
0
-40
-15
10
35
60
85
6.0
OUTPUT ON RESISTANCE ： RON[ Ω]
5.8
Fig.2 Circuit current 2
Fig.3 Dxx on resistance 1
(at IDD=20mA)
5.4
OUTPUT VOLTAGE ： VOH[V]
4.5V
5V
5.6
5.4
5.2
5.0
4.8
4.6
4.4
4.2
4.0
10
4.5V
5V
5.5V
5.2
5.0
4.8
4.6
4.4
4.2
4.0
-40℃
5.5V
25℃
105℃
20
30
40
50
4.5
AMBIENT TEMPERATURE ： Ta[℃]
INPUT CURRENT： I
D
[mA]
4.7
4.9
5.1
5.3
SUPPLY VOLTAGE： Vcc[V]
5.5
Fig.4 Dxx on resistance 2
(at IDD=20mA)
6.0
Fig.5 Dxx on resistance
Fig.6 SEROUT high side voltage 1
(at ISO=-5mA)
0.35
0.35
5.5V
OUTPUT VOLTAGE ： VOH[V]
5.5
0.30
OUTPUT VOLTAGE ： VOL[V]
0.25
0.20
0.15
0.10
0.05
0.00
105℃
OUTPUT VOLTAGE ： VOL[V]
0.30
4.5V
0.25
0.20
0.15
0.10
0.05
0.00
5.0
4.5
4.0
3.5
3.0
-40
-15
10
35
5V
4.5V
25℃
-40℃
5V
5.5V
60
85
4.5
4.7
4.9
5.1
5.3
5.5
-40
AMBIENT TEMPERATURE ： Ta[℃]
SUPPLY VOLTAGE ： Vcc[V]
-15
10
35
60
85
AMBIENT TEMPERATURE ： Ta[℃]
Fig.7 SEROUT high side voltage 2
(at ISO=-5mA)
Fig.8 SEROUT low side voltage 1
(at ISO=5mA)
Fig.9 SEROUT low side voltage 2
(at ISO=5mA)
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© 2009 ROHM Co., Ltd. All rights reserved.
3/12
2009.07 - Rev.B
BD8105FV
●Block
Diagram
Technical Note
SDWN
3
TSD
4
5
6
7
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
<11:0>
17
1
18
2
8
SERIN
LATCH
CLK
RST_B
Driver
Serial
I/F
9
11
12
<11:0> <11:0>
<11:0>
13
14
15
16
VCC
19
10
SEROUT
GND
SEROUT
20
Fig.10
●Pin
Setup Diagram
BD8105FV（SSOP-B20W）
●Terminal
Number・Terminal Name
Pin
Number
1
Terminal
Name
LATCH
RST_B
SDWN
D11
D10
D9
D8
D7
D6
GND
D5
D4
D3
D2
D1
D0
SERIN
CLK
VCC
SEROUT
Function
Latch Signal Input Terminal
（H:
Latches Data）
Reset Reversal Input Terminal
（L:
FF Data 0）
Shutdown Input Terminal
（H:
Output Off）
Drain Output Terminal 11
Drain Output Terminal 10
Drain Output Terminal 9
Drain Output Terminal 8
Drain Output Terminal 7
Drain Output Terminal 6
Ground Terminal
Drain Output Terminal 5
Drain Output Terminal 4
Drain Output Terminal 3
Drain Output Terminal 2
Drain Output Terminal 1
Drain Output Terminal 0
Serial Data Input Terminal
Clock Input Terminal
Supply Voltage Input Terminal
LATCH
RST_B
SDWN
D11
D10
D9
D8
D7
D6
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
SEROUT
VCC
CLK
SERIN
D0
D1
D2
D3
D4
D5
2
3
4
5
6
7
8
9
10
11
12
13
14
GND
10
Fig.11
15
16
17
18
19
20
Serial Data Output Terminal
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© 2009 ROHM Co., Ltd. All rights reserved.
4/12
2009.07 - Rev.B
BD8105FV
●Block
Operation
1）Serial I/F
The I/F is a 3-line serial (LATCH, CLK, SERIN) style.
12-bit output ON/OFF can be set-up. This is composed of shift register. + 12-bit register.
2）Driver
It is a 12-bit open drain output.
Technical Note
3）TSD (Thermal Shut Down)
To prevent heat damage and overheating, when the chip temperature goes over approximately 175℃, the output turns
off. When the temperature goes back down, normal operation resumes. However, the intended use of the
temperature protection circuit is to protect the IC, so please construct thermal design with the junction temperature
Tjmax under 150℃.
●Application
Circuit
VCC
10uF
VBAT
10uF
↓IF
Rres
VF
VCC
SDWN
LATCH
RST_B
CLK
SERIN
SEROUT
GND
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
Micro-
computer
VCC
10uF
VCC
SDWN
LATCH
RST_B
CLK
SERIN
SEROUT
GND
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
IF=
Fig.12
VBAT - VF
Rres + RON
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© 2009 ROHM Co., Ltd. All rights reserved.
5/12
2009.07 - Rev.B
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