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PDF BM81028AMWV Data sheet ( Hoja de datos )
| Número de pieza | BM81028AMWV | |
| Descripción | Multi-Channel System Power Supply IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Power Supply IC Series for TFT-LCD Panels
Multi-Channel
System Power Supply IC
BM81028AMWV
●General Description
BM81028AMWV is a system power supply IC for
TFT-LCD panels which are used in monitors, notebook
type displays, and tablets.
This IC incorporates HAVDD, VCOM amplifier in addition
to the power supply for panel driver (SOURCE, GATE,
and LOGIC power supplies).
Moreover, this IC has a built-in EEPROM for sequence
and output voltage setting retention.
●Applications
TFT-LCD Panels which are used in
Monitors, Note PCs and Tablets.
●Features
Input voltage range:
2.7V to 5.5V
Standby current:
1.4μA (Typ)
Operating temperature range:
-40℃ to +85℃
Step-down DC/DC converter 2-channels
(Synchronous rectification)
Step-up DC/DC converter
(Integrated load switch and Synchronous rectification)
HAVDD amplifier (8bit Resolution)
VCOM amplifier (8bit Resolution)
Positive charge pump (Integrated diode)
Negative charge pump
I2C Interface Output Voltage Setting Control Function
(Integrated EEPROM)
Switching frequency switching function
(600kHz,1200kHz)
Protection circuits
Under-Voltage Lockout
Thermal Shut Down
Over-Current Protection
Over-Voltage Protection
Short Circuit Protection (Timer Latch type)
Input tolerant (SCL, SDA,EN)
●Package
UQFN28V4040A
W(Typ) D(Typ) H(Max)
4.0mm x 4.00mm x 1.00m
●Typical Application Circuit
Fig.1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
1/44
TSZ02201-0313AAF00430-1-2
12.May.2015 Rev.003
1 page  
BM81028AMWV
Datasheet
●Absolute Maximum Ratings
PARAMETER
SYMBOL
LIMITS
Unit
MIN TYP MAX
Power Supply Voltage
VCC, PVCC1, PVCC2
-0.3
－
6.5 V
SWB1, SWB2
-0.3
－
PVCC1+0.3
V
VDD1, VDD2
-0.3 － 6.5 V
AVDD, AVDDP, SW
-0.3
－
19 V
VLSO
-0.3 －
6.5 V
HAVDD, VCOM
-0.3
－
AVDDP+0.3
V
Output Pin
DRP, DRN
-0.3
－
AVDDP+0.3
V
CPP
-0.3 －
30 V
VGH,
-0.3 －
36 V
VGL
-15 － 0.3 V
VREG
-0.3
－
VCC+0.3
V
FAULT
-0.3 － 6.5 V
Functional Pin Voltage
Maximum Junction temperature
Power Dissipation
SCL, SDA, EN
Tjmax (1)
Pd (2)
-0.3 －
6.5 V
－ － 150 ℃
2.01 W
Operating Temperature Range
Topr
-40 －
85 ℃
Storage Temperature Range
(1) Junction temperature at storage time.
(2) JEDEC standard (4 layers)
Tstg
-55 － 150 ℃
●Recommended Operating Ratings(TA=-40℃ to +85℃)
PARAMETER
Power Supply Voltage 1
( DC/DC Block Protection
Detection Voltage 1 setting)
Power Supply Voltage 2
( DC/DC Block Protection
Detection Voltage 2 setting)
Power Supply Voltage 3
( DC/DC Block Protection
Detection Voltage 3 setting)
Power Supply Voltage 4
( DC/DC Block Protection
Detection Voltage 4 setting)
SWB1,SWB2 Current
SW Current
Functional Pin Voltage
2 Line Serial Pin Voltage
2 Line Serial Frequency
SYMBOL
VCC,PVCC1,PVCC2
ISW1
ISW2
EN
SDA, SCL
FCLK
MIN
2.7
2.9
3.1
3.3
－
－
-0.1
-0.1
－
TYP
MAX
Unit
－ 5.5 V
－ 5.5 V
－ 5.5 V
－ 5.5 V
－ 1.0 A
－ 1.5 A
－ 5.5 V
－ 5.5 V
－ 400 kHz
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/44
TSZ02201-0313AAF00430-1-2
12.May.2015 Rev.003
5 Page 
BM81028AMWV
●Reference
(Unless otherwise specified, Ta=25℃, VCC, PVCC1, PVCC2=3.3V, VDD1=2.5V, VDD2=1.2V,
AVDD=10.5V, VGH=18V, VGL=-6V, HAVDD=5.25V, VCOM=3.25V, no load)
Datasheet
100
80
60
40
20
0
0 100 200 300 400 500
load [mA]
Fig.12 VDD1 Efficiency
3
2
1
0
-1
-2
-3
0
100 200 300 400
load [mA]
Fig.13 VDD1Load Regulation
500
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/44
TSZ02201-0313AAF00430-1-2
12.May.2015 Rev.003
11 Page | ||
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