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PDF BU91799KV-M Data sheet ( Hoja de datos )
| Número de pieza | BU91799KV-M | |
| Descripción | Low Duty LCD Segment Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Low Duty LCD Segment Driver
for Automotive Application
BU91799KV-M MAX 200 segments (SEG50×COM4)
General Description
BU91799KV-M is a 1/4 duty general-purpose LCD driver
that can be used for automotive applications and can
drive up to 200 LCD Segments.
It can support operating temperature of up to +105°C and
is qualified AEC-Q100 Grade2, as required for
automotive applications.
It has integrated display RAM for reducing CPU load.
Also, it is designed with low power consumption and no
external component needed..
Features
AEC-Q100 Qualified (Note)
Integrated RAM for Display Data (DDRAM):
50 x 4 bit (Max 200 Segment)
LCD Drive Output :
4 Common Output, Max 50 Segment output
Integrated Buffer AMP for LCD Driving
Integrated Oscillator Circuit
No External Components
Low Power Consumption Design
Independent Power Supply for LCD Driving
Integrated Electrical Volume Register (EVR) function
(Note) Grade 2
Applications
Instrument Clusters
Climate Controls
Car Audios / Radios
Metering
White Goods
Healthcare Products
Battery Operated Applications
etc.
Typical Application Circuit
VLCD
VDD
Key Specifications
■ Supply Voltage Range:
+2.5V to +6.0V
■ LCD Drive Power Supply Range: +2.5V to +6.0V
■ Operating Temperature Range: -40°C to +105°C
■ Max Segments:
200 Segments
■ Display Duty:
1/4
■ Bias:
1/2, 1/3 selectable
■ Interface:
2wire Serial Interface
Special Characteristics
■ ESD(HBM):
■ Latch-up current:
±2000V
±100mA
Package
W (Typ.) x D (Typ.) x H (Max.)
VQFP64
12.00mm x 12.00mm x 1.60mm
C > 0.1uF
Controller
VDD
VDD
VLCD
SDA
SCL
INHb
OSCIN
TEST1
COM0
COM1
COM2
COM3
SEG0
SEG1
Segment
LCD
Insert Capacitors between
VDD / VSS and VLCD / VSS
VSS
SEG49
Internal Clock Mode
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111･14･001
○This product is not designed for protection against radioactive rays.
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TSZ02201-0P4P0D301050-1-2
8. Feb. 2016 Rev.001
1 page  
BU91799KV-M MAX 200 segments (SEG50×COM4)
Electrical Characteristics - continued
MPU interface Characteristics
(VDD=2.5V to 6.0V, VLCD=2.5V to 6.0V, VSS=0V, Ta=-40°C to 105°C, unless otherwise specified)
Parameter
Limits
Symbol
Min
Typ Max Unit
Conditions
Input Rise Time
tr - - 0.3 µs
Input Fall Time
tf - - 0.3 µs
SCL Cycle Time
tSCYC
2.5
-
- µs
“H” SCL Pulse Width
tSHW
0.6
-
- µs
“L” SCL Pulse Width
tSLW
1.3
-
- µs
SDA Setup Time
tSDS
100
-
- ns
SDA Hold Time
tSDH
100
-
- ns
Buss Free Time
tBUF
1.3
-
- µs
START Condition Hold Time tHD;STA 0.6
-
- µs
START Condition Setup Time tSU;STA 0.6
-
- µs
STOP Condition Setup Time tSU;STO 0.6
-
- µs
SDA
SCL
tBUF
tS LW
tf
tSCYC
SDA
I/O Equivalence Circuit
VDD
tHD; STA tr
tSDH tS HW tSDS
tSU; STA
Figure 5. Interface Timing
SDA
tSU; STO
VSS
VLCD
VSS
SCL
VSS
VDD
OSCIN
VSS
VLCD
SEG/COM
VSS
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
VSS
VDD
TEST1
VSS
VDD
INHb
VSS
Figure 6. I/O Equivalence Circuit
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8. Feb. 2016 Rev.001
5 Page 
BU91799KV-M MAX 200 segments (SEG50×COM4)
Display Control (DISCTL)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C 0 1 P4 P3 P2 P1 P0
Set Power save mode FR
Power save mode FR
P4 P3 Reset initialize condition
Normal mode (80Hz)
00
○
Power save mode1 (71Hz)
0
1
Power save mode2 (64Hz)
1
0
Power save mode3 (50Hz)
1
1
Power consumption is reduced in the following order:
Normal mode > Power save mode1 > Power save mode 2 > Power save mode 3.
Set LCD drive waveform
Setup
P2 Reset initialize condition
Line inversion
0○
Frame inversion
1
Power consumption is reduced in the following order:
Line inversion > Frame inversion
Typically, when driving large capacitance LCD, Line inversion will increase the influence of crosstalk.
Regarding driving waveform, refer to LCD driving waveform.
Set Power save mode SR
Setup
P1 P0 Reset initialize condition
Power save mode1
00
Power save mode2
01
Normal mode
10
○
High power mode
11
Power consumption is increased in the following order:
Power save mode 1 < Power save mode 2 < Normal mode < High power mode
(Reference current consumption data)
Setup
Current consumption
Power save mode 1
×0.6
Power save mode 2
×0.8
Normal mode
×1.0
High power mode
×1.2
The data above is for reference only. Actual consumption depends on Panel load.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
11/25
TSZ02201-0P4P0D301050-1-2
8. Feb. 2016 Rev.001
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet BU91799KV-M.PDF ] | |
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