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CAT3614 Datasheet

4-Channel 1-Wire LED Driver

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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 LiIon battery powered devices.
The EN/DIM logic input provides a 1wire 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 12pad TDFN 3 x 3 mm package
with a max height of 0.8 mm.
Features
Drives up to 4 LED Channels
1wire 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 12pad 3 mm x 3 mm Package
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
http://onsemi.com
TDFN12
HV2 SUFFIX
CASE 511AN
PIN CONNECTIONS
VIN
1
C1+
C1
C2
C2+
GND
VOUT
EN/DIM
LED4
LED3
LED2
LED1
(Top View)
MARKING DIAGRAM
HAAA
AXXX
YWW
HAAC
AXXX
YWW
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)
ORDERING INFORMATION
Device
CAT3614HV2T2
(Note 1)
Package
TDFN12
(PbFree)
Shipping
2,000/
Tape & Reel
CAT3614HV2GT2 TDFN12
2,000/
(Note 2)
(PbFree) Tape & Reel
1. MatteTin Plated Finish (RoHScompliant).
2. NiPdAu Plated Finish (RoHScompliant).
© Semiconductor Components Industries, LLC, 2010
1
April, 2010 Rev. 2
Publication Order Number:
CAT3614/D


  ON Semiconductor Electronic Components Datasheet  

CAT3614 Datasheet

4-Channel 1-Wire LED Driver

No Preview Available !

CAT3614
1 mF
1 mF
VIN
3 V to
5.5 V
CIN
1 mF
ENABLE/
DIMMING
C1+ C1C2+ C2
VIN
VOUT
CAT3614
EN/DIM
GND
LED1
LED2
LED3
LED4
VOUT
COUT
1 mF
20 mA
Figure 1. Typical Application Circuit
NOTE: Unused LED channels must be connected to VOUT.
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
VIN, LEDx voltage
6
V
VOUT, C1±, C2± voltage
7
V
EN/DIM voltage
Storage Temperature Range
VIN + 0.7 V
V
65 to +160
°C
Junction Temperature Range
40 to +150
°C
Lead Temperature
300
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Ambient Temperature Range
ILED per LED pin
Total Output Current
NOTE: Typical application circuit with external components is shown above.
Range
Unit
3 to 5.5
V
40 to +85
°C
0 to 31
mA
0 to 124
mA
http://onsemi.com
2


Part Number CAT3614
Description 4-Channel 1-Wire LED Driver
Maker ON Semiconductor
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CAT3614 Datasheet PDF






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