Macroblock
Features
Preliminary Datasheet
MBI5026
16-bit Constant Current LED Sink Driver
MBI5016CNS
MBI5026CNS
·
16 constant-current output channels
·
Constant output current invariant to load voltage change
·
Excellent output current accuracy:
between channels:
±3%
(max.), and
between ICs:
±6%
(max.)
·
Output current adjusted through an external resistor
·
Constant output current range: 5-90 mA
·
Fast response of output current,
OE
(min.): 200 ns
·
25MHz clock frequency
·
Schmitt trigger input
·
5V supply voltage
MBI5016CF
MBI5026CF
MBI5016CP
MBI5026CP
Current Accuracy
Between Channels
Between ICs
<
±3%
<
±6%
Conditions
I
OUT
= 10 mA ~ 60 mA
Product Description
MBI5026 is designed for LED displays. As an enhancement of its predecessor, MBI5016,
MBI5026 exploits PrecisionDrive™ technology to enhance its output characteristics. MBI5026
contains a serial buffer and data latches which convert serial input data into parallel output
format. At MBI5026 output stage, sixteen regulated current ports are designed to provide
uniform and constant current sinks for driving LEDs within a large range of Vf variations.
MBI5026 provides users with great flexibility and device performance while using MBI5026 in
their system design for LED display applications, e.g. LED panels. Users may adjust the output
current from 5 mA to 90 mA through an external resistor, R
ext
, which gives users flexibility in
controlling the light intensity of LEDs. MBI5026 guarantees to endure maximum 17V at the
output port. The high clock frequency, 25 MHz, also satisfies the system requirements of high
volume data transmission.
ÓMacroblock,
Inc. 2003
Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC.
TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail:
info@mblock.com.tw
-1-
MBI5026
Block Diagram
OUT0
16-bit Constant Current LED Sink Driver
OUT
1
OUT14 OUT15
R-EXT
VDD
I
O
Regulator
OE
16-bit Output Driver
16
LE
GND
16-bit Output Latch
16
16-bit Shift Register
SDO
SDI
CLK
Terminal Description
Pin No.
1
2
3
Pin Configuration
Function
GND 1
SDI
2
CLK 3
LE
4
OUT0 5
OUT1 6
OUT2 7
OUT3 8
OUT4 9
OUT5 10
OUT6 11
OUT7 12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
R-EXT
SDO
OE
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
Pin Name
GND
SDI
CLK
Ground terminal for control logic and current
sink
Serial-data input to the shift register
Clock input terminal for data shift on rising
edge
Data strobe input terminal
4
LE
Serial data is transferred to the output latch
when LE is high. The data is latched when
LE goes low.
5~20
OUT0 ~ OUT15 Constant current output terminals
Output enable terminal
21
OE
When (active) low, the output drivers are
enabled; when high, all output drivers are
turned OFF (blanked).
Serial-data output to the following SDI of
next driver IC
Input terminal used to connect an external
resistor for setting up output current for all
output channels
5V supply voltage terminal
22
SDO
23
24
R-EXT
VDD
-2-
April 2003, V0.8-4
MBI5026
16-bit Constant Current LED Sink Driver
Equivalent Circuits of Inputs and Outputs
OE
terminal
VDD
LE terminal
VDD
IN
IN
CLK, SDI terminal
VDD
SDO terminal
VDD
IN
OUT
-3-
April 2003, V0.8-4
MBI5026
Timing Diagram
N=0
1
2
3
4
5
6
7
16-bit Constant Current LED Sink Driver
8
9
10
11
12
13
14
15
CLK
SDI
LE
OE
OUT0
OUT
1
OFF
ON
OFF
ON
OFF
ON
OFF
OUT2
OUT3
ON
OFF
OUT15
ON
SDO
: don’t care
Truth Table
CLK
LE
H
L
H
X
X
OE
L
L
L
L
H
SDI
D
n
D
n+1
D
n+2
D
n+3
D
n+3
OUT0
…
OUT 7
…
OUT15
D
n
…..
D
n - 7
….
D
n - 15
No Change
D
n + 2
….
D
n - 5
….
D
n - 13
D
n + 2
….
D
n - 5
….
D
n - 13
Off
SDO
D
n-15
D
n-14
D
n-13
D
n-13
D
n-13
-4-
April 2003, V0.8-4
MBI5026
Maximum Ratings
Characteristic
Supply Voltage
Input Voltage
Output Current
Output Voltage
Clock Frequency
GND Terminal Current
CNS
–
type
Power Dissipation
(On PCB, Ta=25°C)
CF
–
type
CP
–
type
CNS
–
type
Thermal Resistance
(On PCB, Ta=25°C)
Operating Temperature
Storage Temperature
CF
–
type
CP
–
type
16-bit Constant Current LED Sink Driver
Symbol
V
DD
V
IN
I
OUT
V
DS
F
CLK
I
GND
P
D
Rating
0~7.0
-0.4~V
DD
+ 0.4
+90
-0.5~+20.0
25
1440
1.52
1.30
1.11
82
R
th(j-a)
T
opr
T
stg
96
112
-40~+85
-55~+150
°C
°C
°C/W
W
Unit
V
V
mA
V
MHz
mA
-5-
April 2003, V0.8-4
