Macroblock, 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
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Macroblock
Advance Information
MBI5025
16-bit Constant Current LED Sink Driver
Features
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: 5-50 mA
Fast response of output current,
OE (min.): 200 ns
25MHz clock frequency
Schmitt trigger input
5V supply voltage
Current Accuracy
Between Channels
Between ICs
Conditions
< 3%
< 6%
I
OUT
= 10 mA ~ 50 mA
Product Description
MBI5025 is designed for LED displays. As an enhancement of its predecessor, MBI5016,
MBI5025 exploits PrecisionDriveTM technology to enhance its output characteristics. MBI5025
contains a serial buffer and data latches which convert serial input data into parallel output
format. At MBI5025 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.
MBI5025 provides users with great flexibility and device performance while using MBI5025 in
their system design for LED display applications, e.g. LED panels. Users may adjust the output
current from 5 mA to 50 mA through an external resistor, R
ext
, which gives users flexibility in
controlling the light intensity of LEDs. MBI5025 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.
MBI5016CP
MBI5016CF
MBI5016CNS
MBI5025CNS
MBI5025CF
MBI5025CP
MBI5025
16-bit Constant Current LED Sink Driver
July
2003, V0.1
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GND
SDI
CLK
LE
OUT7
OE
SDO
R-EXT
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
OUT8
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
Block Diagram
Terminal Description
Pin No.
Pin Name
Function
1
GND
Ground terminal for control logic and current
sink
2
SDI
Serial-data input to the shift register
3
CLK
Clock input terminal for data shift on rising
edge
4
LE
Data strobe input terminal
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
21
OE
Output enable terminal
When (active) low, the output drivers are
enabled; when high, all output drivers are
turned OFF (blanked).
22
SDO
Serial-data output to the following SDI of
next driver IC
23
R-EXT
Input terminal used to connect an external
resistor for setting up output current for all
output channels
24
VDD
5V supply voltage terminal
Pin Configuration
16-bit Shift Register
16-bit Output Latch
16-bit Output Driver
LE
SDI
CLK
SDO
16
16
GND
I
O
Regulator
R-EXT
VDD
OUT0
1
OUT
OUT14
OUT15
OE
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