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ROHM Semiconductor |
Datasheet
Power Supply IC Series for TFT-LCD Panels
Automotive Panel Power Management IC
BD81842MUV-M
●General Description
The BD81842MUV-M is a power management IC for
TFT-LCD panels which are used in car navigation,
in-vehicle center panel, and instrument cluster.
Incorporates high-power FET with low on resistance for
large currents that employ high-power packages, thus
driving large current loads while suppressing the
generation of heat. A charge pump controller is
incorporated as well, thus greatly reducing the number
of application components. Also Gate Shading Function
is included.
●Key Specifications
Input voltage range :
AVDD Output voltage range :
SRC Output voltage range :
VCOM Output current :
Oscillator Frequency :
Operating temperature range :
2.0V to 5.5V
6.0V to 18V
12V to 34V
200mA (Typ.)
2.1MHz (Typ.)
-40℃ to +105℃
●Special Characteristics
FB Regulation voltage :
±3% (Ta=-40~105℃)
Oscillator Frequency : ±10.5% (Ta=-40~105℃)
●Typical Application Circuit (TOP VIEW)
●Applications
TFT-LCD Panels which are used in car navigation,
in-vehicle center panel, and instrument cluster.
●Features
AEC-Q100 Qualified(Note 1)
Boost DC/DC converter; 18 V / 2.5 A switch current.
Switching frequency: 2.1 MHz
Operational Amplifier (short current 200mA)
Incorporates Positive / Negative Charge-pump
Controllers.
Gate Shading Function
Protection circuits:
Under Voltage Lockout
Protection Circuit
Thermal Shutdown Circuit (Latch Mode)
Over Current Protection Circuit (AVDD)
Timer Latch Mode Short Circuit Protection (AVDD
SRC /VGL)
Over / Under Voltage Protection Circuit for Boost
DC/DC Output
No SCP time included (185ms from UVLO-off)
(Note1: Grade 2)
●Package
VQFN24SV4040
TDK
VIN SLF7055T-100M2R5(10μH,2.5A)
W(Typ.) x D(Typ.) x H(Max.)
4.0mm x 4.0mm x 1.0mm
10uF
10uF
RSX301LA-30
10V/0.5Amax
AVDD
5.5V
VCOM
AVDD
18k
22k
1uF
AVDD
0.1uF
DA227
0.1uF
0.1uF
DA227
33nF
24
SRC GSOUT
1k
23 22
21 20
1
INP
2
INN
3
VCOM
4
AGND1
5
AVDD
6
DRP
19
18
PGND
FB 17
16
COMP
15
RSTIN
14
AGND2
VIN 13
78
9 10
CTL
11 12
10uF 10uF 10uF
91k
13k
24k
10k 10k 2.2nF
VIN
3.3V
1uF
10k RST
20V/20mA max
SRC
1uF 150k
10k
0.1uF
1uF
16k 0.22μF
120k
VGL
DA227
-7.1V/20mA max
1uF
Figure 1. Application Circuit
○Product structure:Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0313AAF00540-1-2
23. Jun. 2016 Rev.002
BD81842MUV-M
Datasheet
Contents
●General Description ..................................................................................................................................................................1
●Key Specifications ....................................................................................................................................................................1
●Special Characteristics.............................................................................................................................................................1
●Applications...............................................................................................................................................................................1
●Features .....................................................................................................................................................................................1
●Pin Configuration ......................................................................................................................................................................3
●Pin Descriptions........................................................................................................................................................................3
●Block Diagram ...........................................................................................................................................................................4
●Main Block Function .................................................................................................................................................................5
●Absolute Maximum Ratings .....................................................................................................................................................6
●Thermal Resistance ..................................................................................................................................................................6
●Recommended Operating Range.............................................................................................................................................6
●Electrical characteristics ..........................................................................................................................................................7
●Electrical characteristic curves ...............................................................................................................................................9
●Application Example ...............................................................................................................................................................15
●Power Sequence .....................................................................................................................................................................16
●Protect Operation ....................................................................................................................................................................17
●Reset Function ........................................................................................................................................................................17
●Gate Shading Function ...........................................................................................................................................................18
●How to select parts of application .........................................................................................................................................19
●PCB Layout Guide...................................................................................................................................................................24
●I/O Equivalent Circuit Diagrams.............................................................................................................................................26
●Operation Notes ......................................................................................................................................................................27
●Ordering Information ..............................................................................................................................................................29
●Marking Diagrams ...................................................................................................................................................................29
●Physical Dimension, Tape and Reel Information..................................................................................................................30
●Revision History ......................................................................................................................................................................31
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
2/31
TSZ02201-0313AAF00540-1-2
23. Jun. 2016 Rev.002
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