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LT3485EDD-1#PBF

Description
Photoflash Capacitor Charger 10-Pin DFN EP
File Size318KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LT3485EDD-1#PBF Overview

Photoflash Capacitor Charger 10-Pin DFN EP

LT3485EDD-1#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Product CategoryPhotoflash Capacitor Charger
Minimum Operating Supply Voltage (V)2.5
Typical Operating Supply Voltage (V)3.3|5|9
Maximum Operating Supply Voltage (V)10
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Pin Count10
Supplier PackageDFN EP
Standard Package NameDFN
MountingSurface Mount
Package Height0.75(Max)
Package Length3
Package Width3
PCB changed10
Lead ShapeNo Lead
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
Photoflash Capacitor
Chargers with Output Voltage
Monitor and Integrated IGBT Drive
FEATURES
DESCRIPTIO
Integrated IGBT Driver
Voltage Output Monitor
Uses Small Transformers: 5.8mm
×
5.8mm
×
3mm
Operates from Two AA Batteries, Single Cell Li-Ion
or Any Supply from 1.8V up to 10V
No Output Voltage Divider Needed
No External Schottky Diode Required
Charges Any Size Photoflash Capacitor
Available in 10-Lead (3mm
×
3mm) DFN
VERSION
LT3485-3
LT3485-0
LT3485-2
LT3485-1
INPUT CURRENT (mA)
750
500
350
225
CHARGE TIME (sec)
2.5
3.7
5.5
4.0*
Fast Charge Time
V
IN
= V
BAT
= 3.6V
100µF capacitor, 320V. *50µF capacitor
The LT
®
3485 family of photoflash chargers are highly inte-
grated ICs containing complete charger and IGBT drive
functions. The patented control technique of the LT3485-x
allows it to use extremely small transformers. Output voltage
detection requires no external circuitry. The turns ratio of the
transformer controls the final charge voltage. While charging,
the output voltage on the capacitor may be monitored by a
microcontroller from the monitor pin. Each device contains an
on-chip high voltage NPN power switch, which can withstand
negative voltages on the switch pin without an external
Schottky diode. The device features a V
BAT
pin, which allows
the use of two AA cells to charge the capacitor. The internal
circuitry operates from the V
IN
pin. The LT3485-0 has a
primary current limit of 1.4A, whereas the LT3485-3, LT3485-2,
and LT3485-1 have current limits of 2A, 1A and 0.7A respec-
tively. These different current limits result in tightly controlled
input currents.
The CHARGE pin gives full control of the part to the user.
Driving CHARGE low puts the part in shutdown. The DONE pin
indicates when the part has completed charging. The LT3485
series of parts are housed in a leadless (3mm
×
3mm) DFN
package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6636021.
APPLICATIO S
Digital Camera and Cell Phone Flash Charger
TYPICAL APPLICATIO
V
BAT
2 AA OR
1 TO 2 Li-Ion
1:10.2
1
4.7µF
2
V
BAT
DONE
CHARGE
GND
LT3485-0
V
CC
5V
0.22µF
V
IN
IGBTPWR
IGBTIN
IGBTOUT
V
MONT
SW
LT3485-0 Photoflash Charger Uses High Efficiency 3mm Tall Transformers
DANGER HIGH VOLTAGE – OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
320V
4
1M
150µF
PHOTOFLASH
CAPACITOR
2.2µF
600V
TRIGGER T
1
2
TO
MICRO
3
C
AVERAGE
INPUT CURRENT
0.5A/DIV
5
A
V
OUT
50V/DIV
FLASHLAMP
IGBT
3485 TA01
U
LT3485-0 Charging Waveform
V
IN
= 3.6V
C
OUT
= 100µF
1s/DIV
3485 TA02
U
U
34850123fb
1

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Description Photoflash Capacitor Charger 10-Pin DFN EP Photoflash Capacitor Charger 10-Pin DFN EP Photoflash Capacitor Charger 10-Pin DFN EP T/R Photoflash Capacitor Charger 10-Pin DFN EP T/R Photoflash Capacitor Charger 10-Pin DFN EP Photoflash Capacitor Charger 10-Pin DFN EP T/R Photoflash Capacitor Charger 10-Pin DFN EP Photoflash Capacitor Charger 10-Pin DFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active Active Active Active Active
Product Category Photoflash Capacitor Charger Photoflash Capacitor Charger Photoflash Capacitor Charger Photoflash Capacitor Charger Photoflash Capacitor Charger Photoflash Capacitor Charger Photoflash Capacitor Charger Photoflash Capacitor Charger
Minimum Operating Supply Voltage (V) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Typical Operating Supply Voltage (V) 3.3|5|9 3.3|5|9 3.3|5|9 3.3|5|9 9|5|3.3 3.3|5|9 3.3|5|9 9|5|3.3
Maximum Operating Supply Voltage (V) 10 10 10 10 10 10 10 10
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85 85 85 85 85
Supplier Temperature Grade Extended Extended Extended Extended Extended Extended Extended Extended
Packaging Tube Tube Tape and Reel Tape and Reel Tube Tape and Reel Tube Tape and Reel
Pin Count 10 10 10 10 10 10 10 10
Supplier Package DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP
Standard Package Name DFN DFN DFN DFN DFN DFN DFN DFN
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 3 3 3 3 3 3 3 3
Package Width 3 3 3 3 3 3 3 3
PCB changed 10 10 10 10 10 10 10 10
Lead Shape No Lead No Lead No Lead No Lead No Lead No Lead No Lead No Lead
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 - 8542.39.00.01
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