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CAT4004
4-Channel Constant Current
LED Driver with EZDim t
Description
The CAT4004 provides four matched low dropout current sources to
drive LEDs. An external resistor on RSET sets the current in the LED
channels. Each LED channel includes an individual control loop
allowing the device to handle a wide range of LED forward voltages
while still maintaining tight current matching.
The EN/DIM logic inputs supports device enable and a digital
dimming interface for current setting of all LEDs. Six different current
dimming ratios are available.
The device is aimed at “direct drive” battery applications. It is
required that the battery or voltage source have enough headroom to
drive the LED forward voltage and current sink (>150 mV).
The device is available in a tiny 8 ? lead TDFN 2 mm x 3 mm
http://onsemi.com
TDFN ? 8
VP2 SUFFIX
CASE 511AK
PIN CONNECTIONS
package with a max height of 0.8 mm.
Features
EN/DIM
GND
1
VIN
RSET
?
?
?
?
?
?
?
?
?
Four LED Current Sinks with Tight Matching
Low Dropout Driver 130 mV at 30 mA
No Switching Noise
Shutdown Current < 1 m A
LED Current set by External Resistor
Dimming via 1 ? wire EZDim t Interface
Thermal Shutdown Protection
8 ? lead 2 mm x 3 mm TDFN Package
These Devices are Pb ? Free, Halogen Free/BFR Free and are RoHS
Compliant
LED1 LED4
LED2 LED3
(Top View)
MARKING DIAGRAMS
FXA HAA
XXX XXX
YM YM
FX = CAT4004VP2 ? T3
HA = CAT4004VP2 ? GT3
Applications
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
?
?
?
?
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
Y = Production Year (Last Digit)
M = Production Month (1 ? 9, A, B, C)
ORDERING INFORMATION
V IN
2.4 V
to
5.5 V
C IN
1 m F
LED1
LED2 LED3 LED4
20 mA
Device
CAT4004VP2 ? T3
(Note 1)
CAT4004VP2 ? GT3
(Note 2)
Package
TDFN ? 8
(Pb ? Free)
TDFN ? 8
(Pb ? Free)
Shipping
3,000/
Tape & Reel
3,000/
Tape & Reel
One wire
programming
VIN
EN/DIM
CAT4004
1. Matte ? Tin Plated Finish (RoHS ? compliant).
2. NiPdAu Plated Finish (RoHS ? compliant).
RSET
RSET
3.8 k W
GND
Figure 1. Typical Application Circuit
? Semiconductor Components Industries, LLC, 2010
March, 2010 ? Rev. 2
1
Publication Order Number:
CAT4004/D
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相关代理商/技术参数
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