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  ON Semiconductor Electronic Components Datasheet  

CAT3626 Datasheet

LED Driver

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CAT3626
LED Driver, Charge Pump,
6-Channel, I2Ct Interface
Description
The CAT3626 is a high efficiency 1x/1.5x fractional charge pump
with programmable dimming current in six 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 LED channels are configured into three independent pairs, each
containing 2 matched channels. Each pair can be separately
programmed from zero to 32 mA, in 0.5 mA resolution steps, using
the I2C serial interface. Any individual channel can be disabled while
others remain active. When the enable input (EN) is low, the device is
in shutdown mode drawing zero current.
The device is available in a 16pad TQFN package with a max
height of 0.8 mm.
Features
Drives 6 LED Channels
Independent Current on 3 Pairs of LEDs
I2C Serial Interface Programming
Adjustable Current to 32 mA in 0.5 mA Step
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
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
RGB LEDs
LCD and Keypad Backlighting
Cellular Phones, PDAs
Digital Cameras
http://onsemi.com
TQFN16
HV4 SUFFIX
CASE 510AE
PIN CONNECTIONS
1
LEDA1
SDA
SCL
EN
GND
LEDC2
GND
C2+
C2
(4 x 4 mm) (Top View)
MARKING DIAGRAMS
G626
AXXX
YMCC
CDAJ
AXXX
YMCC
G626 = CAT3626HV4T2
CDAJ = CAT3626HV4GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
M = Production Month (19, A, B, C)
CC = Country of Origin (Two Digit)
ORDERING INFORMATION
Device
CAT3626HV4T2
(Note 1)
Package
TQFN16
(PbFree)
CAT3626HV4GT2 TQFN16
(Note 2)
(PbFree)
Shipping
2,000/
Tape & Reel
1. MatteTin Plated Finish (RoHScompliant).
2. NiPdAu Plated Finish (RoHScompliant).
© Semiconductor Components Industries, LLC, 2010
1
March, 2010 Rev. 5
Publication Order Number:
CAT3626/D


  ON Semiconductor Electronic Components Datasheet  

CAT3626 Datasheet

LED Driver

No Preview Available !

CAT3626
1 mF
1 mF
VIN
3 V to CIN
5.5 V
1 mF
ENABLE
I2C Interface
C1C1+ C2C2+
VIN
VOUT
CAT3626
EN
SDA
SCL
LEDA1
LEDA2
LEDB1
LEDB2
LEDC1
LEDC2
GND
pair A
pair B
pair C
COUT
1 mF
20 mA
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
VIN, LEDxx voltage
6
V
VOUT, C1±, C2± voltage
7
V
EN, SDA, SCL voltage
VIN + 0.7 V
V
Storage Temperature Range
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
LED forward voltage
ILED per LED pin
NOTE: Typical application circuit with external components is shown above.
Range
3 to 5.5
40 to +85
Up to 4.2
0 to 32
Units
V
°C
V
mA
http://onsemi.com
2


Part Number CAT3626
Description LED Driver
Maker ON Semiconductor
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CAT3626 Datasheet PDF






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