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PDF BD8160EFV Data sheet ( Hoja de datos )
| Número de pieza | BD8160EFV | |
| Descripción | 12V Input Multi-channel System Power Supply IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Power Supply IC Series for TFT-LCD Panels
12V Input Multi-channel
System Power Supply IC
BD8160AEFV
No.09035EBT01
●Description
The BD8160AEFV is a system power supply for the TFT-LCD panels used for liquid crystal TVs.
Incorporates two high-power FETs with low on resistance for large currents that employ high-power packages, thus driving
large current loads while suppressing the generation of heat. A charge pump controller is incorporated as well, thus greatly
reducing the number of application components.
●Features
1) Step-up and step-down DC/DC converter
2) Incorporates 2.6 A N-channel FET.
3) Incorporates positive/negative charge pumps.
4) Input voltage limit: 8 V to 18 V
5) Feedback voltage: 1.162 V ± 1%
6) Switching frequency: 500 kHz / 750kHz
7) Protection circuit: Under voltage lockout protection circuit
Thermal shutdown circuit
Overcurrent protection circuit
Short Circuit Protection
Overvoltage protection circuit for VS voltage (Boost DC/DC output)
8) HTSSOP-B28 Package
●Applications
Power supply for the TFT-LCD panels used for LCD TVs
●Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Rating
Supply Voltage
SUP,VIN
20
Power Dissipation
Pd 4700*
Operating Temperature Range
Topr
-40～+85
Storage Temperature Range
Tstg
-55～+150
Junction Temperature
Tjmax
150
SW Voltage
VSW
21
SWB Voltage
VSWB
19
EN1,EN2 Voltage
VEN1,VEN2
19
* Derating in done 37.6mW/℃ for operating above Ta≧25℃(On 4-layer 70.0mm×70.0mm×1.6mm board)
●Recommendable Operation Range (Ta=25℃)
Parameter
Symbol
Supply Voltage
VS Voltage
Switch current for SW
Switch current for SWB
EN1,EN2,FREQ Voltage
** Pd, ASO should not be exceeded
SUP,VIN
VS
ISW
ISWB
VEN1,VEN2,VFREQ
Min
8
VIN+2
－
－
－
Limits
Typ
12
15
－
－
－
Max
18
18
2.6**
2.0**
18
Unit
V
mW
℃
℃
℃
V
V
V
Unit
V
V
A
A
V
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/18
2009.07 - Rev.B
1 page  
BD8160AEFV
●Reference Data (Unless otherwise specified, Ta = 25°C)
0.3
0.25
0.2
0.15
0.1
0.05
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
T a [℃]
Fig.13 SWB ON RESISTANCE
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
T a [℃]
Fig.14 DRP ON RESISTANCE
Technical Note
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80
T a [℃]
Fig.15 DRN ON RESISTANCE
VS
SW
Fig.16 OVP WAVEFORM
100
500kHz
95
90
750kHz
85
80
75
70
65
60
55
50
0
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
Iout [A]
2
Fig.17 STEP UP EFFICIENCY
100
98
96 500kHz
94
92 750kHz
90
88
86
84
82
80
8
9 10 11 12 13 14
VIN [V]
Fig.18 STEP UP EFFICIENCY
100
500kHz
90
80
750kHz
70
60
50
40
30
20
10
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Iout [A]
Fig.19 STEP DOWN EFFICIENCY
100
90
80
70
60
50
40
30
20
10
0
8
500kHz
750kHz
VS
Vlogic
VGH
VGL
9 10 11 12 13 14
VIN [V]
Fig.20 STEP DOWN EFFICIENCY
Fig.21 START UP WAVEFORM
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/18
2009.07 - Rev.B
5 Page 
BD8160AEFV
Technical Note
●Selecting Application Components
(1) Output LC constant (Boost Converter)
The inductance L to use for output is decided by the rated current ILR and input current maximum value IOMAX of the
inductance.
IL
IOMAX + IL should not
reach the rated
value level
VCC
IL
ILR
IOMAX mean
current
Vo
L Co
t
Fig. 29
Fig. 30
Adjust so that IOMAX + ∆IL does not reach the rated current value ILR. At this time, ∆IL can be obtained by the following
equation.
∆IL =
1
L
Vcc
Vo-Vcc
Vo
1
f
[A]
Set with sufficient margin because the inductance L value may have the dispersion of ± 30%.
For the capacitor C to use for the output, select the capacitor which has the larger value in the ripple voltage VPP
permissible value and the drop voltage permissible value at the time of sudden load change.
Output ripple voltage is decided by the following equation.
∆VPP = ILMAX RESR +
1
fCo
Vcc
Vo
( ILMAX -
∆IL
2
)
[V]
Perform setting so that the voltage is within the permissible ripple voltage range.
For the drop voltage VDR during sudden load change, please perform the rough calculation by the following equation.
VDR =
∆I
Co
10 µs [V]
However, 10 µs is the rough calculation value of the DC/DC response speed.
Make Co settings so that these two values will be within the limit values.
(2) Output LC constant (Buck Converter)
The inductance L to use for output is decided by the rated current ILR and input current maximum value IOMAX of the
inductance.
IL
IOMAX + IL should not
reach the rated
value level
ILR
IOMAX mean
current
t
VCC
IL Vo
L
Co
Fig. 31
Fig. 32
Adjust so that IOMAX + ∆IL does not reach the rated current value ILR. At this time, ∆IL can be obtained by the following
equation.
∆IL =
1
L
(Vcc - Vo)
Vo
Vcc
1
f [A]
Set with sufficient margin because the inductance L value may have the dispersion of ± 30%.
For the capacitor C to use for the output, select the capacitor which has the larger value in the ripple voltage VPP
permissible value and the drop voltage permissible value at the time of sudden load change.
Output ripple voltage is decided by the following equation.
∆VPP
=
∆IL RESR +
∆IL Vo
2Co Vcc
1
f
[V]
Perform setting so that the voltage is within the permissible ripple voltage range.
For the drop voltage VDR during sudden load change, please perform the rough calculation by the following equation.
VDR =
∆I
Co
10 µs [V]
However, 10 µs is the rough calculation value of the DC/DC response speed.
Make Co settings so that these two values will be within the limit values.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/18
2009.07 - Rev.B
11 Page | ||
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