Macroblock
Features
Datasheet
MBI5027
16-Bit Constant Current LED Sink Driver
with Open/Short Circuit Detection
Dual In-Line Package
I5016CNS
MBI5016CNS
Open-/Short-Circuit Detection Mode to detect individual LED errors
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
Optional for “Pb-free & Green” Package
CD: SOP24-300-1.27
GD: SOP24-300-1.27
CF: SOP24-300-1.00
GF: SOP24-300-1.00
CN: P-DIP24-300-2.54
GN: P-DIP24-300-2.54
CNS: SP-DIP24-300-1.78
GNS: SP-DIP24-300-1.78
Small Outline Package
I5016CF
Current Accuracy
Between Channels
< ±3%
Between ICs
< ±6%
Conditions
I
OUT
= 10 ~ 60 mA
Shrink
BI5016CP
SOP
CP\CPA: SSOP24-150-0.64
GP\GPA: SSOP24-150-0.64
Macroblock,
Inc. 2005
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-
April 2005, VA.02
MBI5027
16-Bit Constant Current LED Sink Driver with Open/Short Circuit Detection
Product Description
MBI5027 succeeds MBI5026 and is designed for LED displays with Open-/Short-circuit Detection extension.
MBI5027 exploits PrecisionDrive™ technology to enhance its output characteristics. MBI5027 contains a 16-bit
shift register and data latches, which convert serial input data into parallel output format. At MBI5027 output stage,
sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs within a
wide range of V
F
variations.
While MBI5027 is used in their system design for LED display applications, e.g. LED panels, it provides users with
great flexibility and device performance. 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. MBI5027 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.
MBI5027 exploits the idea of Share-I-O™ technology to extend its performance；in addition, MBI5027 is backward
compatible with MBI5026 in both electrical characteristics and package aspect. With Share-I-O™ technology, users
can let MBI5027 enter a special function mode, an Open-/Short-circuit Detection mode. In an Open-/Short-circuit
Detection mode, users can set a specific sequence of signals on LE(ED1),
OE
(ED2) and CLK input pins. For
Short-Circuit Detection mode, however, in addition to the previous steps, users need bias insufficiently LED loads,
this step that can make sure to distinguish LED loads with normal current from ones with short error. In
Open-/Short-circuit Detection mode, MBI5027 detects the status of individual LED connected to MBI5027. The
status will be saved in the built-in shift register. Then, a system controller may read, through SDO pin, the error
status from the register to know whether LEDs are properly lit or not. By setting another sequence of signals on
LE(ED1),
OE
(ED2) and CLK input pins, MBI5027 may resume to a Normal mode and perform as MBI5026. In
Application Information,
users can get detailed ideas about how MBI5027 works in the Open-/Short-circuit
Detection mode.
By means of the Share-I-O™ technique, an additionally effective function, Open-/Short-circuit Detection, can be
added to LED drivers, MBI5027, without any extra pins. Thus, MBI5027 could be a drop-in replacement of
MBI5026. The printed circuit board originally designed for MBI5026 may be also applicable for MBI5027.
For MBI5027, Pin LE and
OE
can respectively offer two functions:
Device Type
Pin Name Function description
CN\CNS\CD\CF\CP
Pin4
LE + Error Detection
GN\GNS\GD\GF\GP
CPA
Pin10
LE + Error Detection
GPA
CN\CNS\CD\CF\CP
Pin21
OE
+Error Detection
GN\GNS\GD\GF\GP
CPA
Pin3
OE
+Error Detection
GPA
-2-
April 2005, VA.02
stm32/stm8
京公网安备 11010802033920号
EEWORLD
