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PDF BD26502GUL Data sheet ( Hoja de datos )

Número de pieza BD26502GUL
Descripción Dot Matrix LED Display Driver
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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No Preview Available ! BD26502GUL Hoja de datos, Descripción, Manual

System LED Drivers for Mobile Phones
7x17(Max.) Dot Matrix
LED Display Driver
BD26502GUL
No.10041EAT01
Description
BD26502GUL is “Matrix LED Driver” that is the most suitable for the cellular phone.
It can control 7x17(119 dot) LED Matrix by internal 7-channel PMOS SWs and 17-channel LED drivers.
It can control the luminance and firefly lighting of the LED matrix by the setting of the internal register.
It supports SPI and I2C interface.
VCSP50L4 (4.1mm0.55mm height max), small and thin type chip size package.
It adopts the very thin CSP package that is the most suitable for the slim phone.
Features
1) LED Matrix driver (7x17)
It has 7-channel PMOS SWs and 17-channel current drivers with 1/7 timing driven sequentially.
Put ON/OFF(for every dot).
The current drivers can drive 0-20.00mA current with 16 step(for every dot).
64 steps of the luminance control by PWM (common setting for all dots)
Continuous (TDMA off ) lighting function for LED14-LED17
Easy register setting by A/B 2-side map for each dot.
2) Automatic Slope function
Cycle time, Slope time can be set for each dot.
3) 8-direction automatic scroll function.
4) Interface
SPI and I2C BUS FS mode(max 400kHz)Compatibility
For I2C mode, I2C Device address is selectable (74h or 75h)
5) Thermal shutdown
6) Small and thin CSP package
62pin VCSP50L4(4.1mm2 0.55mm height max)
*This chip is not designed to protect itself against radioactive rays.
*This material may be changed on its way to designing.
*This material is not the official specification.
Absolute Maximum Ratings (Ta=25 oC)
Parameter
Symbol
Ratings
Unit
Maximum voltage (note2)
VMAX 7 V
Maximum voltage (note1)
VIOMAX
4.5
V
Power Dissipation (note3)
Pd
1550
mW
Operating Temperature Range
Topr
-40 ~ +85
Storage Temperature Range
Tstg
-55 ~ +150
note1)
note2)
note3)
VIO,RESETB,CE,SDA,SCL,IFMODE,SYNC,CLKIN,CLKOUT,TEST1,TEST2,TEST3,TESTO, DO terminal
Except the above
Power dissipation deleting is 12.4mW/ oC , when it’s used in over 25 oC. (ROHM’s standard board has been mounted.)
The power dissipation of the IC has to be less than the one of the package.
Operating Conditions (VBATVIO, VINSWVBAT, Ta=-40~85 oC)
Parameter
Symbol
Limits
VBAT input voltage
VBAT
2.7 ~ 5.5
VINSW input voltage
VINSW
2.7 ~ 5.5
VIO pin voltage
VIO 1.65 ~ 3.3
Unit
V
V
V
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/39
2010.02 - Rev.A

1 page




BD26502GUL pdf
BD26502GUL
Block Diagram / Application Circuit Example 2
Technical Note
VBAT
VBAT1
VBAT2
VBAT3
10µF
ISET
100kΩ
VIO
1µF
RESETB
I2C or SPI
selectable
CE
SDA
SCL
IFMODE
SYNC
CLKIN
CLKOUT
GND1
GND2
GND3
GND4
GND5
GND6
GND7
GND8
GND9
GND10
GND11
VREF
IREF
OSC
T06
T05
Logic
TDMA
T04
T03
T02
T01
T00
20.00mA/ch
1.33mA step
TDMA
Enable
TDMA
TDMA
TDMA
I/O Level
SPI / I2C
interface
Shift Digital Control
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
TDMA
PWM
VINSW
VINSW1
VINSW2
VINSW3
10μF
SW7
SW6
SW5
SW4
SW3
SW2
SW1
LED17
LED16
LED15
LED14
LED13
LED12
LED11
LED10
LED9
LED8
LED7
LED6
LED5
LED4
LED3
LED2
LED1
7×13
Dot Matrix Unit
Fig.3 Block Diagram / Application Circuit example 2
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/39
2010.02 - Rev.A

5 Page





BD26502GUL arduino
BD26502GUL
Technical Note
2. I2C BUS format
When IFMODE is set to “L”, it can interface with I2C BUS format.
(1) Slave address
CE A7 A6 A5 A4 A3 A2 A1
L 1110100
H 1110101
R/W
0
(2) Bit Transfer
SCL transfers 1-bit data during H. During H of SCL, SDA cannot be changed at the time of bit transfer. If SDA changes
while SCL is H, START conditions or STOP conditions will occur and it will be interpreted as a control signal.
SDA
SCL
SDA a state of stabilitySDA
Data are effective It can change
Fig.6 Bit transfer (I2C format)
(3) START and STOP condition
When SDA and SCL are H, data is not transferred on the I2C- bus. This condition indicates, if SDA changes from H to L
while SCL has been H, it will become START (S) conditions, and an access start, if SDA changes from L to H while SCL
has been H, it will become STOP (P) conditions and an access end.
SDA
SCL
S
P
START condition
STOP condition
Fig.7 START/STOP condition (I2C format)
(4) Acknowledge
It transfers data 8 bits each after the occurrence of START condition. A transmitter opens SDA after transfer 8bits data,
and a receiver returns the acknowledge signal by setting SDA to L.
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
not acknowledge
acknowledge
SCL
S
12
8
START condition
clock pulse for
acknowledgement
Fig.8 Acknowledge (I2C format)
9
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/39
2010.02 - Rev.A

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