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BD8179MUV PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD8179MUV
기능 5V Input Multi-channel System Power Supply IC
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BD8179MUV 데이터시트, 핀배열, 회로
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
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© 2009 ROHM Co., Ltd. All rights reserved.
1/12
2009.07 - Rev.B
Free Datasheet http://www.datasheet4u.com/




BD8179MUV pdf, 반도체, 판매, 대치품
BD8179MUV
Reference Data (Unless otherwise specified, Ta = 25, VIN=5V)
3
2.5
2
1.5
1
0.5
0
0123456
VIN (V)
Fig.1 Supply Current
(No switching)
7
94
92
90
88
86
84
82
80
78
76
0
100 200 300 400 500
Io[mA]
Fig.4 Efficiency vs Output Current
(VMAIN)
1
0.8
0.6
0.4
0.2
0
-0.2 0
-0.4
-0.6
-0.8
-1
20 40 60 80 100
Io[mA]
Fig.7 Gate-ON Voltage
Load Regulation
2
1.5
1
0.5
0
-40 10 60
Ta[]
Fig.2 Switching Frequency
vs Temperature
1
0 .8
0 .6
0 .4
0 .2
0
-0.2 0
- 0 .4
- 0 .6
- 0 .8
-1
100 200 300 400 500
Io[mA]
Fig.5 VMAIN Voltage
Load Regulation
1
0.8
0.6
0.4
0.2
0
-0.2 0
-0.4
-0.6
-0.8
-1
20 40 60 80 100
Io[mA]
Fig.8 Gate-OFF Voltage
Load Regulation
Technical Note
1000
100
10
1
0.1
0.001
0.01
0.1
DEL CAPACITOR [uF]
Fig.3 Delay Time
vs Capacitor
1
VIMAIN
LX
Fig.6 Over Voltage Protect
waveform
COM
CTL
Fig.9 Gate Shading Output
waveform
IN
OUT
IN OUT
300Ω
100pF
Fig.10 AMP Slew Rate
(Rise)
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© 2009 ROHM Co., Ltd. All rights reserved.
IN OUT
IN OUT
300Ω
100pF
Fig.11 AMP Slew Rate
(Fall)
4/12
Fig.12 Start Up Sequence
waveform
2009.07 - Rev.B
Free Datasheet http://www.datasheet4u.com/

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BD8179MUV 전자부품, 판매, 대치품
BD8179MUV
Technical Note
Under Voltage Lock Out (UVLO)
The UVLO circuit compares the input voltage at IN with the UVLO threshold (2.4V rising, 2.2V falling, typ) to ensure the input
voltage is high enough for reliable operation.
The 200mV (typ) hysteresis prevents supply transients from causing a restart. Once the input voltage exceeds the UVLO
rising threshold, startup begins. When the input voltage falls below the UVLO falling threshold, the controller turns off the
main step-up regulator, turns off the linear-regulator outputs, and disables the Gate Shading controller.
Thermal Shut Down (TSD)
The TSD prevents excessive power dissipation from overheating the BD8179MUV. When the junction temperature exceeds
Tj=175(Typ), a thermal sensor immediately activates. The fault protection, which shuts down all outputs except the
reference, allowing the device to cool down. Once the device cools down by approximately 15reactivate the device.
Over Voltage Protection (OVP)
The Step up DC/DC converter has OVP circuit.
The OVP circuit compares the input Voltage at SUP with the OVP threshold (19V rising, 18.5V falling, Typ) to protect the step
up DC/DC output exceed the absolute maximum voltage. Once the SUP Voltage exceeds the OVP rising threshold, turn off
the main Step-up regulator.
Then, the SUP Voltage falls bellow the OVP falling threshold,reactivate the main Step-Up regulator.
Over Current Protection (OCP)
The Step-Up DC/DC converter, linear-regulator and Operational Amplifier have OCP circuit respectively.
The OCP circuit restricts to load current, when an OCP activated, one’s own output only restricted.
However, if the output continue to overload, the device is possible to activate thermal shutdown or short current protection.
Timer Latch Mode Short Current Protection (SCP)
BD8179MUV has SCP circuit feature to prevent the large current flowing when the output is shorted to GND.
This function is monitoring VMAIN, VGON, and VGOFF Voltage and starts the timer when at least one of the outputs operating
properly (when the output voltage was lower than expected).
After 150ms (Typ.) of this abnormal state, the device will shutdown the all outputs and latch the state.
VMAIN
FB
VGON
FBP
VGOFF
FB N
150ms typ
Counter
reset
all outputs
shut down.
Fig.13 SCP Block Diagram
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
7/12
2009.07 - Rev.B
Free Datasheet http://www.datasheet4u.com/

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부품번호상세설명 및 기능제조사
BD8179MUV

5V Input Multi-channel System Power Supply IC

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