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CAT3612 Datasheet

Programmable 300 mA Camera Flash LED Driver

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CAT3612
Programmable 300 mA
Camera Flash LED Driver
Description
The CAT3612 is a highefficiency 1x/1.5x fractional charge pump
with programmable current in two LED channels. Each channel
delivers accurate regulated current up to 150 mA and make CAT3612
ideal for driving one or two flash LEDs.
Low noise operation 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
90%, 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, pulsing the EN/DIM
reduces the LED current on each negative edge in 31 linear steps from
150 mA down to zero current.
The device is available in the tiny 12lead thin DFN 3 mm x 3 mm
package with a max height of 0.8 mm.
Features
Dual Matched Regulated LED Channels
300 mA Output Current (150 mA per Channel)
1wire EZDimt Programmable LED Current
32 Accurate Dimming Levels
Power Efficiency up to 90%
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
12lead TDFN 3 mm x 3 mm Package
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
Camera Flash
Cellular Phones
Digital Still Cameras
http://onsemi.com
TDFN12
HV2 SUFFIX
CASE 511AN
PIN CONNECTIONS
VIN
1
C1+
C1
C2
GND
LED1
VOUT
N/C
EN/DIM
N/C
C2+
LED2
(Top View)
MARKING DIAGRAM
HAAD
AXXX
YWW
HAAF
AXXX
YWW
HAAD = CAT3612HV2-T2
HAAF = CAT3612HV2-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
CAT3612HV2T2
(Note 1)
Package
TDFN12
(PbFree)
Shipping
2,000/
Tape & Reel
CAT3612HV2GT2 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:
CAT3612/D


  ON Semiconductor Electronic Components Datasheet  

CAT3612 Datasheet

Programmable 300 mA Camera Flash LED Driver

No Preview Available !

CAT3612
1 mF
1 mF
VIN
3 V to
5.5 V
CIN
2.2 mF
C1+
VIN
C1C2+ C2
VOUT
CAT3612
ENABLE/
DIMMING
EN/DIM
GND
LED1
LED2
COUT
2.2 mF
Flash
LED
300 mA
Figure 1. Typical Application Circuit
NOTE: Unused LED channel must be connected to VOUT
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
VIN, LED1, LED2 voltage
6
V
VOUT, C1±, C2± voltage
7
V
EN/DIM 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
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 150
mA
0 to 300
mA
http://onsemi.com
2


Part Number CAT3612
Description Programmable 300 mA Camera Flash LED Driver
Maker ON Semiconductor
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CAT3612 Datasheet PDF






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