Photoflash Chargers. LT3585-3 Datasheet

LT3585-3 Chargers. Datasheet pdf. Equivalent

Part LT3585-3
Description (LT3585-x) Photoflash Chargers
Feature www.DataSheet4U.com FEATURES ■ ■ ■ ■ ■ ■ ■ ■ LT3585-0/LT3585-1 LT3585-2/LT3585-3 Photoflash Charger.
Manufacture Linear Technology
Datasheet
Download LT3585-3 Datasheet



LT3585-3
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FEATURES
Adjustable Input Current
Integrated IGBT Driver
No Output Voltage Divider Needed
Uses Small Transformers: 5.8mm × 5.8mm × 3mm
Fast Photoflash Charge Times
Charges Any Size Photoflash Capacitor
Supports Operation from Single Li-Ion Cell, Two AA
Cells or any Supply from 1.5V Up to 16V
Small 10-Lead (3mm × 2mm) DFN Package
Fast Charge Time
VERSION
NORMAL MODE
INPUT
CHARGE TIME
CURRENT (mA)
(Sec)
LT3585-3
800/400
3.3
LT3585-0
550/275
4.6
LT3585-2
400/200
5.8
LT3585-1*
250/115
5.0
100µF capacitor, 320V, VIN = VBAT = 3.6V
*50µF capacitor, 320V, VIN = VBAT = 3.6V
U
APPLICATIO S
REDUCED MODE
CHARGE TIME
(Sec)
6.6
9.2
12.6
14.6
Digital/Film Camera Flash
PDA/Cell Phone Flash
Emergency Strobe
LT3585-0/LT3585-1
LT3585-2/LT3585-3
Photoflash Chargers with
Adjustable Input Current
and IGBT Drivers
DESCRIPTIO
The LT®3585 series are highly integrated ICs designed to
charge photoflash capacitors in digital and film cameras.
A new control technique allows for the use of extremely
small transformers. Each part contains an on-chip high
voltage NPN power switch. Output voltage detection is
completely contained within the part, eliminating the need
for any discrete zener diodes or resistors. The output volt-
age can be adjusted by simply changing the turns ratio
of the transformer.
The CHRG/IADJ pin gives full control of the part to the
user. Driving CHRG/IADJ low puts the part in low power
shutdown. The CHRG/IADJ pin can also be used to reduce
the input current of the charger, useful in extending battery
life. The DONE pin indicates when the part has completed
charging.
The LT3585 series of parts are housed in tiny 3mm ×
2mm DFN packages.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
LT3585-1 Photoflash Charger Uses High Efficiency
2mm Tall Transformers with Tunable IGBT Gate Drive
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
VBAT
2 AA OR
1 TO 2 Li-Ion
4.7µF
1:10:2
14
2 5
VBAT
DONE
SW
GND
CHRG/IADJ
VIN
5V
VIN LT3585-1
0.22µF IGBTPWR
IGBTIN IGBTPU
IGBTPD
20TO
160
320V
+ 50µF
PHOTOFLASH
CAPACITOR
TO GATE OF IGBT
1M
2.2µF
600V
TRIGGER T
1
3
2
A
FLASHLAMP
C
3585 TA01a
LT3585-1 Charging Waveform
Normal Input Current Mode
VOUT
50V/DIV
IIN
500mA/DIV
VBAT = 3.6V
COUT = 50µF
1sec/DIV
3585 TA01b
3585f
1



LT3585-3
LT3585-0/LT3585-1
wwwL.DTata3Sh5eet84U5.co-m2/LT3585-3
ABSOLUTE AXI U RATI GS
(Note 1)
VIN Voltage................................................................16V
VBATT Voltage ............................................................16V
SW Voltage ...............................................................60V
SW Pin Negative Current...........................................–1A
CHRG/IADJ Voltage...................................................10V
IGBTPWR Voltage .....................................................10V
IGBTIN Voltage .........................................................10V
IGBTPU Voltage ........................................................10V
IGBTPD Voltage ........................................................10V
DONE Voltage ...........................................................10V
Current Into DONE Pin ............................... 0.2mA/–1mA
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
IGBTIN 1
IGBTPWR 2
GND 3
VIN 4
VBAT 5
10 IGBTPU
9 IGBTPD
11 8 SW
7 CHRG/IADJ
6 DONE
DDB PACKAGE
10-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 76°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER DDB PART MARKING
LT3585EDDB-0
LT3585EDDB-1
LT3585EDDB-2
LT3585EDDB-3
LCLK
LCLJ
LCLH
LCFX
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = VBAT = VCHRG = 3V unless otherwise noted (Note 2). Specifications
are for the LT3585-0, LT3585-1, LT3585-2, LT3585-3 unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Quiescent Current
VIN Voltage Range
VBAT Voltage Range
Switch Current Limit
Switch VCESAT
VOUT Comparator Trip Voltage
VOUT Comparator Overdrive
DCM Comparator Trip Voltage
CHRG/IADJ Pin Current
Switch Leakage Current
CHRG/IADJ Minimum Enable Voltage
VCHRG = 3V, Not Switching
VCHRG = 0V, In Shutdown
LT3585-3 (Note 3)
LT3585-0 (Note 3)
LT3585-2 (Note 3)
LT3585-1 (Note 3)
LT3585-3, ISW = 1.4A
LT3585-0, ISW = 1A
LT3585-2, ISW = 700mA
LT3585-1, ISW = 400mA
Measured as VSW – VBAT
300ns Pulse Width
Measured as VSW – VBAT
VCHRG = 3V
VCHRG = 0V
VBAT = VSW = 5V, In Shutdown
58
01
2.5
16
1.5
16
1.55 1.7 1.85
1.1 1.2 1.3
0.75 0.85 0.95
0.45 0.55 0.65
485
330
230
140
31 31.5 32
30.5 31.5 32.5
200 400
80 130 180
45 70
0 0.1
0.01 1
1.1
mA
µA
V
V
A
A
A
A
mV
mV
mV
mV
V
V
mV
mV
µA
µA
µA
V
3585f
2





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