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© Semiconductor Components Industries, LLC, 2010
April, 2010 − Rev. 2
1 Publication Order Number:
CAT3614/D
CAT3614
4-Channel 1-Wire LED
Driver in 3 x 3 mm Package
Description
The CAT3614 is a high efficiency 1x/1.5x fractional charge pump
with programmable dimming current in four LED channels. To ensure
uniform brightness in LCD backlight applications, each LED channel
delivers an accurate regulated current.
Low noise and input ripple is achieved by operating at a constant
switching frequency of 1 MHz which allows the use of small external
ceramic capacitors. The 1x/1.5x fractional charge pump supports a
wide range of input voltages from 3 V to 5.5 V with efficiency up to
91%, and is ideal for Li−Ion battery powered devices.
The EN/DIM logic input provides a 1−wire EZDimt interface for
dimming control of the LEDs. When enabled, a series of clock pulses
reduces the LED brightness in 1 mA steps on each negative going
edge. Currents from 0 mA to 31 mA are supported.
The device is available in the tiny 12−pad TDFN 3 x 3 mm package
with a max height of 0.8 mm.
Features
• Drives up to 4 LED Channels
• 1−wire EZDimt Programmable LED Current
• Accurate 1 mA Dimming Level
• Power Efficiency up to 91%
• Fractional Pump 1x/1.5x
• Low Noise Input Ripple
• Fixed High Frequency Operation 1 MHz
• “Zero” Current Shutdown Mode
• Soft Start and Current Limiting
• Short Circuit Protection
• Thermal Shutdown Protection
• TDFN 12−pad 3 mm x 3 mm Package
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• LCD Display Backlight
• Cellular Phones
• Digital Still Cameras
• Handheld Devices
http://onsemi.com
TDFN−12
HV2 SUFFIX
CASE 511AN
PIN CONNECTIONS
HAAA
AXXX
YWW
MARKING DIAGRAM
(Top View)
VOUTVIN
C1+
C1−
1
C2−
C2+
GND
EN/DIM
LED4
LED3
LED2
LED1
HAAC
AXXX
YWW
Device Package Shipping
ORDERING INFORMATION
CAT3614HV2−T2
(Note 1)
TDFN−12
(Pb−Free)
2,000/
Tape & Reel
CAT3614HV2−GT2
(Note 2)
TDFN−12
(Pb−Free)
2,000/
Tape & Reel
1. Matte−Tin Plated Finish (RoHS−compliant).
2. NiPdAu Plated Finish (RoHS−compliant).
HAAA = CAT3614HV2-T2
HAAC = CAT3614HV2-GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digit)
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1 Seite 8
- ・ Abmessungen des Paketumrisses on Seite 11
- ・ Teilenummerierungssystem on Seite 1 Seite 12
- ・ Markierungsinformationen on Seite 1
- ・ Blockdiagramm on Seite 9
- ・ Typisches Anwendungsschaltbild on Seite 2
- ・ Technische Daten on Seite 2 Seite 12
- ・ Anwendungsbereich on Seite 1
