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Rohm Semiconductor Electronic Components Datasheet

BD26502GUL Datasheet

Dot Matrix LED Display Driver

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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


Rohm Semiconductor Electronic Components Datasheet

BD26502GUL Datasheet

Dot Matrix LED Display Driver

No Preview Available !

BD26502GUL
Technical Note
Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VINSW=3.6V, VIO=1.8V)
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Condition
[ Circuit Current ]
VBAT Circuit current 1
IBAT1
-
0 3.0 μA RESETB=0V, VIO=0V
VBAT Circuit current 2
IBAT2
-
0.8 5.0 μA RESETB=0V, VIO=1.8V
VBAT Circuit current 3
IBAT3
-
2.0
3.5
mA
When LED1-17 are active
with default settings.
[ UVLO ]
UVLO Threshold
VUVLO
-
2.1 2.5 V VBAT falling
UVLO Hysteresis
VHYUVLO 50
-
- mV
[ LED Driver ] (LED1-17)
Maximum output current ILEDMax
-
20.00
- mA LED1-17 ,ISET100kΩ
Output current
ILED
-7.0%
LED current Matching
ILEDMT
-
Driver pin voltage range VLED
0.2
10.67
-
-
+7.0% mA I=10.67mA setting, VLED=1V
ILEDMT=
5 % (ILEDMax-ILEDMin)/(ILEDMax+ILEDMin)
I=10.67mA setting, VLED=1V
VBAT- 1.4 V
LED OFF Leak current
ILKLED
-
- 1.0 μA
[ PMOS switch ]
Leak current at OFF
ILEAKP
-
- 1.0 μA
Resistor at ON
RonP
-
1.0
- Isw=170mA, VINSW=4.5V
[ OSC ]
OSC frequency
fosc 0.96 1.2 1.44 MHz
[ CE, SYNC, CLKIN, IFMODE ]
L level input voltage
VIL1
-0.3
- 0.25 x VIO V
H level input voltage
VIH1 0.75 x VIO
-
VIO +0.3 V
L level input current IIL1 - 0 1 μA
H level input current
IIH1 -
0
1 μA
[ SDA, SCL ]
L level input voltage
VIL2
-0.3
- 0.25 x VIO V
H level input voltage
VIH2 0.75 x VIO
-
VIO +0.3 V
Input hysteresis
Vhys 0.05 x VIO
-
-V
L level output voltage
(for SDA pin)
VOL2
0
- 0.3 V At 3mA sink current
Input current
Iin1 -3 - 3 μA Input voltage = from (0.1 x VIO) to (0.9 x VIO)
[ RESETB ]
L level input voltage
VIL3
-0.3
- 0.25 x VIO V
H level input voltage
VIH3 0.75 x VIO
-
VIO +0.3 V
Input current
Iin2 - 0 1 μA Input voltage = from (0.1 x VIO) to (0.9 x VIO)
[ CLKOUT ]
L level output voltage
VOL1
-
- 0.4 V IOL=2mA
H level output voltage
VOH1 0.75 x VIO
-
- V IOH=-2mA
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
2/39
2010.02 - Rev.A


Part Number BD26502GUL
Description Dot Matrix LED Display Driver
Maker ROHM
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