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BD8179MUV Datasheet

5V Input Multi-channel System Power Supply

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Power Supply IC Series for TFT-LCD Panels
5V Input Multi-channel
System Power Supply IC
BD8179MUV
No.09035EBT04
Description
The BD8179MUV is a system power supply IC for TFT panels.
A 1-chip IC providing a total of three voltages required for TFT panels, i.e., source voltage, gate high-level, and gate low-level
voltage, thus constructing a TFT panel power supply with minimal components required.
Features
1) Step Up DC/DC Converter.
2) Incorporates 18V, 3.0A N-channel FET
3) Linear-Regulator Controllers for VGON and VGOFF
4) 5 channel Operational Amplifiers/±150mA Output Short-Circuit Current 40V / µs Slew Rate
5) Switching Frequency: 1200 kHz.
6) Gate Shading Function Included.
7) Protection Circuits
8) Over Current Protection
9) Timer Latch Mode Short Current Protection.
10) Thermal Shut Down.
11) Under Voltage Protection.
12) Over Voltage Protection
13) VQFN032V5050 Package
Applications
Liquid crystal TV, PC monitor, and TFT-LCD panel
Absolute maximum ratings (Ta = 25)
Parameter
Symbol
Power Supply Voltage
VIN
VMAIN Voltage
VMAIN
SUP Voltage
VSUP
DRVP Voltage
VDRVP
DRVN Voltage
VDRVN
SRC Voltage
VSRC
CTL Voltage
VCTL
Junction Temperature
Tjmax
Power Dissipation
Pd
Operating Temperature Range
Topr
Storage Temperature Range
Tstg
* Reduced by 19.52 mW/over 25, when mounted on a glass epoxy board.
(4-layer 74.2 mm 74.2 mm 1.6 mm).
Limit
7
20
20
40
-30
40
7
150
4560
-4085
-55150
Unit
V
V
V
V
V
V
V
mW
Operating Condition
Parameter
Power Supply Voltage
VMAIN Voltage
SUP Voltage
DRVP Voltage
DRVN Voltage
SRC Voltage
Symbol
VIN
VMAIN
VSUP
VDRVP
VDRVN
VSRC
Limit
Min. Max.
2.6 5.5
8 18
- 18
- 38
- -20
- 38
Unit
V
V
V
V
V
V
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/12
2009.07 - Rev.B
Free Datasheet http://www.datasheet4u.com/


Rohm Semiconductor Electronic Components Datasheet

BD8179MUV Datasheet

5V Input Multi-channel System Power Supply

No Preview Available !

BD8179MUV
Technical Note
Electrical Characteristics (Unless otherwise specified, VIN = 3.3V; VSUP = 12 V; VGON = 25 V; VGOFF = -6V; Ta = 25)
1 DC/DC CONVERTER CONTROLLER BLOCK
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Conditions
[ ERROR AMPLIFIER BLOCK ]
FB Input Bias Current
IFB - 0.1 - µA
Feed Back Voltage
VFB
1.221
1.233
1.245
V Buffer, No load
Comp Sink Current
Ioi 1
5 10 µA VFB=1.5V VCOMP=0.5V
Comp Source Current
Ioo -10
-5
-1
µA VFB=1.0V VCOMP=0.5V
[ LX BLOCK ]
LX ON-Resistance
Ron - 200 - m
LX Leak Current
Ileak
-
0 10 µA VLX=18V
MAX Duty Cycle
DMAX
-
90
-
%
LX Current Limit
ILX 2.5
-
-
A
[ INTERNAL SOFT START BLOCK ]
Soft Start Delay Time
tss - 3.25 - ms
2. GATE-ON LINEAR REGULATOR CONTROLLER
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Conditions
FBP Voltage
VFBP
1.225
1.25
1.275
V
FBP Input Bias Current
IFBP
-
0.1
-
µA
DRVP Current Limit
IDRVP
1
3. GATE-OFF LINEAR REGULATOR CONTROLLER
5
10 mA
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Conditions
FBN Voltage
VFBN
0.235
0.25
0.265
V
FBN Input Bias Current
IFBN
-
0.1
-
µA
DRVN Current Limit
IDRVN
4. OPERATIONAL AMPLIFIERS
1
5 10 mA
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Conditions
Input Offset Voltage
Voff - 0 - mV VPOS15 = 6V
Input Range
VRANGE
0
VSUP
V
DRIVE Current
Idrv 50
-
- mA
Slew Rate
SR - 40 - V/us
5. GATE SHADING CONTROLLER BLOCK
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Conditions
DEL Start Period
tdd - 15 - ms
DEL Source Current
Idls -8 -5 -2 µA
DEL Threshold Voltage
Vdls 1.2 1.25 1.3
V
CTL Input Low Voltage
Vctll -
- VIN x 0.3 V
CTL Input High Voltage
Vchlh VIN x 0.7
-
-
V
CTL Input Current
Ictl 8 16.5 25 µA VCTL=3.3V
SRC ON Resistance
RonSRC
-
5
-
DRN ON Resistance
RonDRV
-
30
-
This product is not designed for protection against radioactive rays.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
2/12
2009.07 - Rev.B
Free Datasheet http://www.datasheet4u.com/


Part Number BD8179MUV
Description 5V Input Multi-channel System Power Supply
Maker Rohm
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