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Unisonic Technologies
Unisonic Technologies


L16B45

16-BIT CONSTANT CURRENT LED SINK DRIVER



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L16B45 pdf
UNISONIC TECHNOLOGIES CO., LTD
L16B45
Preliminary
16-BIT CONSTANT CURRENT
LED SINK DRIVER
DESCRIPTION
The UTC L16B45 is designed for LED displays. UTC L16B45
contains a serial buffer and data latches which convert serial input
data into parallel output format. At UTC L16B45 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.
UTC L16B45 provides users with great flexibility and device
performance while using UTC L16B45 in their system design for
LED display applications, e.g. LED panels. Users may adjust the
output current from 3mA to 45mA through an external resistor, Rext,
which gives users flexibility in controlling the light intensity of LEDs.
UTC L16B45 guarantees to endure maximum 17V at the output
port. The high clock frequency, 25MHz, also satisfies the system
requirements of high volume data transmission.
FEATURES
* 16 constant-current output channels
* Constant output current invariant to load voltage change
Constant output current range:
3~45mA @ VDD=5V
3~30mA @ VDD=3.3V
* Excellent output current accuracy:
between channels: ±3% (typ.),
between ICs: ±6% (typ.)
* Output current adjusted through an external resistor
* Fast response of output current, OE (min.): 300ns @ VDD=3.3V
* 25MHz clock frequency
* Schmitt trigger input
* 3.3V, 5V supply voltage
ORDERING INFORMATION
Ordering Number
L16B45G-S24-R
Package
SOP-24
CMOS IC
SOP-24 (300 mil)
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 11
QW-R102-059.c



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L16B45 pdf
L16B45
MARKING
Preliminary
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTION
PIN NO.
1
2
3
4
5~20
21
22
23
24
PIN NAME
GND
SDI
CLK
LE
OUT0 ~ OUT15
OE
SDO
R-EXT
VDD
DESCRIPTION
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
Serial data is transferred to the output latch when LE is high. The data is latched
when LE goes low.
Constant current output terminals
Output enable terminal
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
3.5V/5V supply voltage terminal
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 11
QW-R102-059.c



Part Number L16B45
Description 16-BIT CONSTANT CURRENT LED SINK DRIVER
Maker Unisonic Technologies - Unisonic Technologies
Total Page 11 Pages
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