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PDF BD8174MUV Data sheet ( Hoja de datos )

Número de pieza BD8174MUV
Descripción Multi-channel System Power Supply IC
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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Datasheet
Power Supply IC Series for TFT-LCD Panels
Output voltage fixed-type
Multi-channel System Power Supply IC
BD8174MUV
General Description
The BD8174MUV is a system power supply IC that
generates 6 power supply channels required by TFT-LCD
panels on a single chip.
Output voltage and sequence is fixed so that it is possible
to control output with few external components.
Key Specifications
Power Supply Voltage 1 Range:
Oscillating Frequency:
Operating Temperature Range:
10V to 14V
700kHz(Typ)
-40°C to +105°C
Package
W(Typ) x D(Typ) x H(Max)
Features
Step-up DC/DC Converter with Built-in 3A FET
Synchronous Step-down DC/DC Converter with
Built-in 2A FET
High Voltage LDO (50mA)
Low Voltage LDO (400mA)
Positive/ Negative Charge Pumps (Integrated-diode)
10bit DAC 4CH
VCOM Amplifier
Gate Shading Function
All-output Shut Down Function
Power Good Function
Protection Circuits:
Under-Voltage Lockout Protection Circuit
Thermal Shutdown Circuit
Over Current Protection Circuit
Over Voltage Protection Circuit
Timer Latch Type Short-Circuit Protection Circuit
Constant Startup Sequence
VQFN048V7070
7.00mm x 7.00mm x 1.00mm
Applications
LCD TV power supplies
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/38
TSZ02201-0313AAZ00670-1-2
17.Feb.2016 Rev.001

1 page




BD8174MUV pdf
BD8174MUV
Pin Description
PIN
Pin name
NO.
1 PVCC1
2 PVCC1
3 CPPCTL
4 HVCC
5 VGL_S
6 CPN
7 CPP1
8 CPP2
9 CPGND
10 CPD2
11 CPD1
12 VGH
13 COM
14 DRN
15 CTL
16 THR
17 VCOM
18 INN
19 INP
20 HVLDO
21 FBLD1
22 DACGND
23 SCP
24 OUT0
25 OUT1
26 OUT2
27 OUT3
28 GND
29 SDA
30 SCL
31 LVLDO
32 REG5
33 VDD_S
34 GCTL
35 SW2
36 PGND2
37 BOOT
38 LVCTL
39 PG
40 PVCC2
Function
Boost DC/DC load switch input. See Boost DC/DC (1) for more information.
Boost DC/DC load switch input. See Boost DC/DC (1) for more information.
Positive charge pump control input. See charge pump (4) for more information.
Power supply pin for charge pump, buffer amplifier and HV_LDO.
Negative charge pump output VGL feedback input.
Negative charge pump regulator driver output. Drive pin for negative charge pump.
See charge pump (4) for more information.
Positive charge pump regulator driver output1. Drive pin for positive charge pump.
See charge pump (4) for more information.
Positive charge pump regulator driver output2. Drive pin for positive charge pump.
See charge pump (4) for more information.
Power grounding pin at charge pump.
Positive charge pump internal switching diode output2.
Positive charge pump internal switching diode output1.
Positive charge pump output VGH. Connect output capacitor from this pin to GND.
Gate shading output pin.
Termination of the low side switch of the gate voltage shading block.
Gate shading control input pin.
Gate shading Low level setting pin.
VCOM Output
VCOM input-.
VCOM input+.
HV_LDO output pin. Insert output capacitance for GND.
HV_LDO feedback input pin.
GND pin for DAC.
Short protection delay pin. To set short protection delay time, connect capacitor for GND pair.
For details, refer to information in common block (6).
Gamma output pin.
Gamma output pin.
Gamma output pin.
Gamma output pin.
Grounding pin.
Serial data input pin.
Serial clock input pin.
LV_LDO output pin. Output outputs 1.8V/ 1.5V/ 1.2V (typ). Insert output capacitance for GND.
Internal power supply 5.0V output pin. Connect 0.1µF from this pin to ground.
Buck DC/DC output VDD feedback input. No external registance necessary for feedback register.
Boost DC/DC load switch PGATE control input. For details, refer to information in Boost DC/DC (1).
Buck DC/DC switching output. Due to reduce EMI, make a wiring thick and short.
Buck DC/DC switching node power grounding pin. Due to reduce EMI, make a wiring thick and short.
Buck DC/DC bootstrap pin. This pin generates the gate drive voltage for the Buck converter.
Connect 0.1µF from this pin to the switch pin of step down converter, SW2.
LVLDO output voltage setting pin.
Power good output. After positive charge pump output VGH startup, It will be ON. For Buck DC/DC output,
Pull-UP and use it. If you dont use it, It will open.
Buck DC/DC high side MOSFET power supply input. Connect a capacitor as close to PVCC pin as possiple.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/38
TSZ02201-0313AAZ00670-1-2
17.Feb.2016 Rev.001

5 Page





BD8174MUV arduino
BD8174MUV
Typical Performance Curves continued
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 5 10 15 20 25 30 35 40
VGH[V]
Figure 5. Divided Voltage vs VGH
20
15
10
5
0
-5
-10
-15
-20
0
0.5 1
FFBB11Voltag[eV][V]
1.5
2
Figure 6. ICOMP vs FB1 Voltage
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0
0.5 1
FBF1B1Voltag[eV[]V]
1.5
Figure 7. IFB1 vs FB1 Voltage
2
100
90
80
70
60
50
40
30
20
10
0
0
0.5 1 1.5
CCOOMMPP11Volta[Vge] [V]
2
Figure 8. DUTY vs COMP1 Voltage
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
11/38
TSZ02201-0313AAZ00670-1-2
17.Feb.2016 Rev.001

11 Page







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