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CAT4008 Datasheet

8-Channel Constant Current LED Driver

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CAT4008 pdf
CAT4008
8-Channel Constant Current
LED Driver
Description
The CAT4008 is an 8 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 0.4 V (for 2 to
100 mA LED current) allows for more power efficient designs.
A high−speed 4−wire serial interface of up to 25 MHz 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 TSSOP package.
Features
8 Constant Current−sink Channels
Serial Interface up to 25 MHz Clock Frequency
3 V to 5.5 V Logic Supply
LED Current Range from 2 mA to 100 mA
LED Current set by External RSET Resistor
300 mV LED Dropout at 30 mA
Thermal Shutdown Protection
Available in 16−lead SOIC (150 and 300 mil wide), and TSSOP
Packages
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
Billboard Display
Marquee Display
Instrument Display
General Purpose Display
www.onsemi.com
MARKING
DIAGRAM
TSSOP−16
Y SUFFIX
1 CASE 948AN
AB
4008YZZ
3YMXXX
CAT4008Y−T2
A = Assembly Location
3 = Lead Finish − Matte−Tin
B = Product Revision (Fixed as “B”)
4008Y = Device Code
Z or ZZ = Leave Blank
Y = Production Year (Last Digit)
M = Production Month (1-9, A, B, C)
XXX or XXXX = Last Three of Four Digits of
XXX or XXXX = Assembly Lot Number
PIN CONNECTIONS
1
GND
VDD
SIN RSET
SCLK
SOUT
XLAT
BLANK
LED1
LED8
LED2
LED7
LED3
LED6
LED4
LED5
16−Lead TSSOP (Y)
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
July, 2015 − Rev. 3
1
Publication Order Number:
CAT4008/D


  ON Semiconductor Electronic Components Datasheet  

CAT4008 Datasheet

8-Channel Constant Current LED Driver

No Preview Available !

CAT4008 pdf
VIN
3 V to
5.5 V
CAT4008
1 mF
VDD LED1 LED2
BLANK
LATCH
SIN
CLK
CAT4008
GND
20 mA
LED8
SOUT
RSET
to next
device
3.09 kW
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Units
VDD Supply Voltage
6V
Logic input/output voltage (SIN, SOUT, CLK, BLANK, LATCH)
LEDn voltage
−0.3 V to VDD+0.3 V
6
V
V
DC output current on LED1 to LED8
150 mA
Storage Temperature Range
−55 to +160
_C
Junction Temperature Range
−40 to +150
_C
Lead Soldering Temperature (10 sec.)
300 _C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter
VDD
Voltage applied to LED1 to LED8
LED current RSET control range
Ambient Temperature Range
Range
3.0 to 5.5
0.4 to 5.5
up to 100
−40 to +85
Units
V
V
mA
_C
www.onsemi.com
2


Part Number CAT4008
Description 8-Channel Constant Current LED Driver
Maker ON Semiconductor
Total Page 11 Pages
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