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CAT4016 Datasheet, PDF (1/15 Pages) Catalyst Semiconductor – 16-Channel Constant Current LED Driver | |||
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CAT4016
16-Channel Constant Current LED Driver
FEATURES
 16 Constant current-sink channels
 Serial interface up to 25MHz clock frequency
 3V to 5.5V logic supply
 LED current range from 2mA to 100mA
 LED current set by external RSET resistor
 300mV LED dropout at 30mA
 Thermal shutdown protection
 Available in RoHS-compliant 24-lead SOIC,
TSSOP, QSOP, and 4 x 4mm TQFN packages
APPLICATION
 Billboard Display
 Marquee Display
 Instrument Display
 General Purpose Display
For Ordering Information details, see page 14.
DESCRIPTION
The CAT4016 is a 16 channel constant current driver
for LED billboard and other general display
applications. LED channel currents are programmed
together via an external RSET resistor. Low output
voltage operation on the LED channels as low as 0.4V
(for 2 to 100mA LED current) allows for more power
efficient designs.
A high-speed 4-wire serial interface of up to 25MHz
clock frequency controls each individual channel using
a shift register and latch configuration. A serial output
data pin (SOUT) allows multiple devices to be
cascaded and programmed via one serial interface.
The device also includes a blanking control pin
(BLANK) that can be used to disable all channels
independently of the interface.
Thermal shutdown protection is incorporated in the
device to disable the LED outputs if the die
temperature exceeds a set limit.
The device is available in the 24-lead SOIC, TSSOP,
QSOP and the compact TQFN 4 x 4mm packages.
TYPICAL APPLICATION CIRCUIT
VIN
3V to
5.5V
1µF
VDD LED1 LED2
BLANK
LATCH
SIN
CLK
CAT4016
GND
20mA
LED16
SOUT
RSET
to next
device
3kâ¦
© Catalyst Semiconductor, Inc.
1
Characteristics subject to change without notice
Doc. No. MD-5028 Rev. B
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