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LED Driver. CAT3612 Datasheet

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LED Driver. CAT3612 Datasheet
















CAT3612 Driver. Datasheet pdf. Equivalent













Part

CAT3612

Description

Programmable 300 mA Camera Flash LED Driver



Feature


CAT3612 Programmable 300 mA Camera Flas h LED Driver Description The CAT3612 is a high−efficiency 1x/1.5x fractional charge pump with programmable current in two LED channels. Each channel deliv ers accurate regulated current up to 15 0 mA and make CAT3612 ideal for driving one or two flash LEDs. Low noise opera tion is achieved by operating at a cons tant switching frequ.
Manufacture

ON Semiconductor

Datasheet
Download CAT3612 Datasheet


ON Semiconductor CAT3612

CAT3612; ency of 1 MHz which allows the use of sm all 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 Li−Ion battery powered devices. The EN/DIM logic input provide s a 1−wire EZDimt interface for dimmi ng control of the LEDs. When enabled, p ulsing the EN/DIM redu.


ON Semiconductor CAT3612

ces the LED current on each negative edg e in 31 linear steps from 150 mA down t o zero current. The device is available in the tiny 12−lead thin DFN 3 mm x 3 mm package with a max height of 0.8 m m. Features • Dual Matched Regulated LED Channels • 300 mA Output Current (150 mA per Channel) • 1−wire EZDim t Programmable LED Current • 32 Accur ate Dimming Levels • Power Eff.


ON Semiconductor CAT3612

iciency up to 90% • Fractional Pump 1x /1.5x • Low Noise Input Ripple • Fi xed High Frequency Operation 1 MHz • “Zero” Current Shutdown Mode • So ft Start and Current Limiting • Short Circuit Protection • Thermal Shutdow n Protection • 12−lead TDFN 3 mm x 3 mm Package • These Devices are Pb Free, Halogen Free/BFR Free and are Ro HS Compliant Applications • Camera Flash • C.





Part

CAT3612

Description

Programmable 300 mA Camera Flash LED Driver



Feature


CAT3612 Programmable 300 mA Camera Flas h LED Driver Description The CAT3612 is a high−efficiency 1x/1.5x fractional charge pump with programmable current in two LED channels. Each channel deliv ers accurate regulated current up to 15 0 mA and make CAT3612 ideal for driving one or two flash LEDs. Low noise opera tion is achieved by operating at a cons tant switching frequ.
Manufacture

ON Semiconductor

Datasheet
Download CAT3612 Datasheet




 CAT3612
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
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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




 CAT3612
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
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 CAT3612
CAT3612
Table 3. ELECTRICAL OPERATING CHARACTERISTICS
(over recommended operating conditions unless specified otherwise) VIN = 3.6 V, EN = High, ambient temperature of 25°C.
Symbol
Parameter
Conditions
Min
Typ
Max
IQ
Quiescent Current
1x mode, no load
0.5
1.5x mode, no load
3
IQSHDN
ILEDACC
ILEDDEV
ROUT
Shutdown Current
LED Current Accuracy
LED Channel Matching
Output Resistance (open loop)
FOSC
ISC_MAX
IIN_MAX
IEN/DIM
VHI
VLO
Charge Pump Frequency
Output short circuit Current Limit
Input Current Limit
EN/DIM Pin
Input Leakage
Logic High Level
Logic Low Level
VEN = 0 V
1
5 mA ILED 150 mA
±3
(ILED ILEDAVG) / ILEDAVG
±3
1x mode, IOUT = 100 mA
0.4
1.5x mode, IOUT = 100 mA
2.6
0.8
1
1.3
VOUT < 0.5 V
60
1x mode, VOUT > 1 V
350
1
1
1.3
0.4
TSD
Thermal Shutdown
165
THYS
Thermal Hysteresis
20
VUVLO
Undervoltage lock out (UVLO) Threshold
2
Table 4. RECOMMENDED EN/DIM TIMING
(For 3 V VIN 5.5 V, over full ambient temperature range 40°C to +85°C.)
Symbol
Parameter
Conditions
TSETP
TLO
THI
TOFF
TD
TDEC
EN/DIM setup from shutdown
EN/DIM program low time
EN/DIM program high time
EN/DIM low time to shutdown
LED current enable
LED current decrement
Min
Typ
Max
10
0.3
200
0.3
1.5
40
0.1
Unit
mA
mA
%
%
W
MHz
mA
mA
mA
V
V
°C
°C
V
Unit
ms
ms
ms
ms
ms
ms
TSETP
THI
TOFF
EN/DIM
TD
TLO
LED
Current
TDEC
150mA 145 mA 140 mA
Shutdown
150 mA
5 mA
0 mA
Figure 2. LED Dimming Timing Diagram
Shutdown
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