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PDF BD8162AEKV Data sheet ( Hoja de datos )
| Número de pieza | BD8162AEKV | |
| Descripción | Multi-channel System Power Supply IC + Gamma Buffer | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Power Supply IC Series for TFT-LCD Panels
Multi-channel
System Power Supply IC + Gamma Buffer
BD8162AEKV
General Description
The BD8162AEKV is a system power supply IC that
provides control 6 power supply channels and 4 gamma
output channels + VCOM required for TFT-LCD panels on
a single chip. All channels have built-in control input and
Power-Good output functions, enabling free sequence
control setting just by changing channels. In addition, the
BD8162AEKV is a user-friendly IC incorporating input
switch, short-circuit protection, and protection detection
output circuits.
Key Specifications
Power Supply Voltage 1 Range:
4.2V to 14V
Oscillating Frequency: 200kHz to 800kHz(Variable)
Operating Temperature Range: -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
Step-down DC/DC Converter with Built-in 2A FET
Synchronous Rectification Step-down DC/DC
Converter with Built-in 2A FET
3ch LDO Regulator (500mA, 200mA, 20mA)
Positive/Negative Charge Pumps
4ch Gamma Buffer Amplifier + VCOM
Protection Circuits:
Under-Voltage Lockout Protection Circuit
Thermal Shutdown Circuit
Timer Latch Type Short-Circuit Protection Circuit
Controllable Startup Sequence
HTQFP64V
12.00mm x 12.00mm 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
1/26
TSZ02201-0323AAF00690-1-2
15.Feb.2016 Rev.001
1 page  
BD8162AEKV
Absolute Maximum Ratings (Ta=25°C)
Parameter
Symbol
Rating
Unit
Power Supply Voltage 1
VCC, VPVCC2, 3
15
V
Power Supply Voltage 2
VLDVCC2
7
V
Power Supply Voltage 3
VHVCC 20 V
SW1 Pin Voltage
VSW1 20 V
Maximum Junction Temperature
Tjmax
150
°C
Power Dissipation
Pd
5.20 (Note 1)
W
Operating Temperature Range
Topr
-40 to +105
°C
Storage Temperature Range
Tstg
-55 to +150
°C
(Note 1) To use the IC at temperatures over Ta25°C, derate power rating by 41.6mW/°C.
When mounted on a four-layer glass epoxy board measuring 70 mm x 70 mm x 1.6 mm (with reverse side of copper foil measuring 70mm x 70 mm).
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions (Ta-40°C to +105°C)
Parameter
Symbol
Min
Power Supply Voltage 1
VCC, VPVCC2, 3
4.2
Power Supply Voltage 2
VLDVCC2
-
Power Supply Voltage 3
VHVCC
6
SW1 Pin Voltage
VSW1
-
SW1 Pin Current
ISW1
-
SW2, 3 Pin Current
ISW2,3
-
Fault Detection Pull-up Voltage
VFAULT
-
Power Good Pull-up Voltage
VPG
-
Switching Frequency
fSW 200
Max
14
5.5
18
18
3
2
5.5
5.5
800
Unit
V
V
V
V
A
A
V
V
kHz
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/26
TSZ02201-0323AAF00690-1-2
15.Feb.2016 Rev.001
5 Page 
BD8162AEKV
( i ) Ordinary integrator (Low-pass filter)
( ii ) Open loop characteristics of integrator
Feedback
R
FB
＋
A
－
C
COMP
Figure 7
Po i n at )( fa 1 [Hz]
2RCA
A
Gain
【dB】
0
0
【Ph°】ase－90
－180
(a)
-20dB/decade
GBW(b)
－90°
Phase margin
－180°
Figure 8
Po i nbt) ( fb GBW 1 [Hz]
2RC
F
F
Since the phase compensation like that shown in (a) and (b) applies to the error amplifier, it will act as a low-pass
filter.
For DC/DC converter applications, R represents feedback resistors connected in parallel.
According to the LC resonance of the output, two phase leads should be added.
Vo
R1
R2
R4
C1
－
＋A
COMP
R3
C2
LC resonant frequency fp 1
2 LC
Phase lead fz1 1 [Hz]
2C1R1
Phase lead fz2 1
[Hz]
2C2R3
[Hz]
Figure 9
Set the lead frequency of one of the phases close to the LC resonant frequency for the purpose of canceling the LC
resonance.
Note: If high-frequency noise occurs in output, it will pass through capacitor C1 and affect the feedback. To avoid this problem, add resistor R4 of
approximately 1kΩ in series with capacitor C1.
(1.7) Duty cycle limit setting
Applying a voltage to the DTC pin makes it possible to fix the maximum duty cycle. Furthermore, since the upper limit
value of the maximum duty cycle is fixed within the IC, it will not increase beyond the upper limit value. Figure 10
shows the relationship between the DTC voltage and the maximum duty cycle. Refer to this figure to make the DTC
voltage setting. Subsequently, set R15 and R16 so that the DTC voltage will reach the level shown in the figure.
100
80
60
40
20
0
0 0.2 0.4 0.6 0.8
DTC [V]
Figure 10. Characteristics of DTC Voltage vs Duty Cycle
1
Set the maximum duty cycle with sufficient margin so that it will not reach the maximum duty cycle for normal use.
For step-up converters, the range normally used is as follows.
Max On duty cycle =
VOMAX - VCCMIN
VOMAX
< Max set duty cycle
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/26
TSZ02201-0323AAF00690-1-2
15.Feb.2016 Rev.001
11 Page | ||
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| PDF Descargar | [ Datasheet BD8162AEKV.PDF ] | |
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