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
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
W(Typ) x D(Typ) x H(Max)
VQFN048V7070
7.00mm x 7.00mm x 1.00mm
Applications
LCD TV power supplies
○Product
structure：Silicon monolithic integrated circuit
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This
product has no designed protection against radioactive rays
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TSZ02201-0313AAZ00670-1-2
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BD8174MUV
Pin Description
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Pin name
PVCC1
PVCC1
CPPCTL
HVCC
VGL_S
CPN
CPP1
CPP2
CPGND
CPD2
CPD1
VGH
COM
DRN
CTL
THR
VCOM
INN
INP
HVLDO
FBLD1
DACGND
SCP
OUT0
OUT1
OUT2
OUT3
GND
SDA
SCL
LVLDO
REG5
VDD_S
GCTL
SW2
PGND2
BOOT
LVCTL
PG
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 don’t 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.
TSZ22111・15・001
5/38
TSZ02201-0313AAZ00670-1-2
17.Feb.2016 Rev.001
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