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LED Driver. CAT3626 Datasheet

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LED Driver. CAT3626 Datasheet
















CAT3626 Driver. Datasheet pdf. Equivalent













Part

CAT3626

Description

LED Driver



Feature


CAT3626 LED Driver, Charge Pump, 6-Chan nel, I2Ct Interface Description The CA T3626 is a high efficiency 1x/1.5x frac tional charge pump with programmable di mming current in six LED channels. To e nsure uniform brightness in LCD backlig ht applications, each LED channel deliv ers an accurate regulated current. Low noise and input ripple is achieved by o perating at a cons.
Manufacture

ON Semiconductor

Datasheet
Download CAT3626 Datasheet


ON Semiconductor CAT3626

CAT3626; tant switching frequency of 1 MHz which allows the use of small external cerami c capacitors. The 1x/1.5x fractional ch arge pump supports a wide range of inpu t voltages from 3 V to 5.5 V with effic iency up to 91%, and is ideal for Li− Ion battery powered devices. The LED ch annels are configured into three indepe ndent pairs, each containing 2 matched channels. Each pair .


ON Semiconductor CAT3626

can be separately programmed from zero t o 32 mA, in 0.5 mA resolution steps, us ing the I2C serial interface. Any indiv idual channel can be disabled while oth ers remain active. When the enable inpu t (EN) is low, the device is in shutdow n mode drawing zero current. The device is available in a 1−6pad TQFN packag e with a max height of 0.8 mm. Features • Drives 6 LED Chan.


ON Semiconductor CAT3626

nels • Independent Current on 3 Pairs of LEDs • I2C Serial Interface Progra mming • Adjustable Current to 32 mA i n 0.5 mA Step • Power Efficiency up t o 91% • Fractional Pump 1x/1.5x • L ow Noise Input Ripple • Fixed High Fr equency Operation 1 MHz • “Zero” Current Shutdown Mode • Soft Start an d Current Limiting • Short Circuit Pr otection • Thermal Shutdown Protection • T.





Part

CAT3626

Description

LED Driver



Feature


CAT3626 LED Driver, Charge Pump, 6-Chan nel, I2Ct Interface Description The CA T3626 is a high efficiency 1x/1.5x frac tional charge pump with programmable di mming current in six LED channels. To e nsure uniform brightness in LCD backlig ht applications, each LED channel deliv ers an accurate regulated current. Low noise and input ripple is achieved by o perating at a cons.
Manufacture

ON Semiconductor

Datasheet
Download CAT3626 Datasheet




 CAT3626
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
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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




 CAT3626
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
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2




 CAT3626
CAT3626
Table 3. ELECTRICAL OPERATING CHARACTERISTICS
VIN = 3.6 V, EN = High, ambient temperature of 25°C (over recommended operating conditions unless specified otherwise)
Symbol
Parameter
Test Conditions
Min
Typ
Max
IQ
Quiescent Current
1x mode, all LEDs Off
0.5
1x mode, all LEDs On
2.2
1.5x mode, all LEDs Off
3.5
IQSHDN Shutdown Current
VEN = 0 V
0
1
ILED
LED Current Range with 6 LEDs
0
32
ILEDACC LED Current Accuracy
1 mA v ILED v 31 mA
±3
ILEDDEV LED Channel Matching
(ILED ILEDAVG) / ILEDAVG
±3
ROUT
Output Resistance (open loop)
1x mode, IOUT = 120 mA
0.5
1.5x mode, IOUT = 120 mA
2.8
FOSC
Charge Pump Frequency
0.8
1
1.3
ISC_MAX Output short circuit Current Limit
VOUT < 0.5 V
60
IIN_MAX Input Current Limit
1x mode, VOUT > 1 V
300
IEN
VHIEN
VLOEN
VHI
VLO
EN Pin
Input Leakage
Logic High Level
Logic Low Level
I2C SDA, SCL
High Level Input Voltage
Low Level Input Voltage
1
1.3
0.7 x VIN
1
0.4
0.3 x VIN
TSD
Thermal Shutdown
165
THYS
Thermal Hysteresis
20
VUVLO Undervoltage lock out (UVLO) threshold
2
Units
mA
mA
mA
%
%
W
MHz
mA
mA
mA
V
V
V
V
°C
°C
V
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3




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