LT3468ES5-1 Linear Technology, LT3468ES5-1 Datasheet

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LT3468ES5-1

Manufacturer Part Number
LT3468ES5-1
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LT3468ES5-1

Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Pin Count
5
Mounting
Surface Mount
Package Type
TSOT-23
Case Length
2.9mm
Screening Level
Industrial
Lead Free Status / RoHS Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT3468ES5-1
Manufacturer:
LT
Quantity:
10 000
Part Number:
LT3468ES5-1#TRMPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT3468ES5-1#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Highly Integrated IC Reduces Solution Size
Uses Small Transformers:
Fast Photoflash Charge Times:
Controlled Input Current:
Supports Operation from Single Li-Ion Cell, or Any
Supply from 2.5V up to 16V
Adjustable Output Voltage
No Output Voltage Divider Needed
Charges Any Size Photoflash Capacitor
Low Profile (<1mm) SOT-23 Package
Digital / Film Camera Flash
PDA / Cell Phone Flash
Emergency Strobe
5.8mm × 5.8mm × 3mm
4.6s for LT3468 (0V to 320V, 100µF, V
5.7s for LT3468-2 (0V to 320V, 100µF, V
5.5s for LT3468-1 (0V to 320V, 50µF, V
500mA (LT3468)
375mA (LT3468-2)
225mA (LT3468-1)
DANGER HIGH VOLTAGE – OPERATION BY HIGH VOLTAGE
2.5V TO 8V
CHARGE
DONE
V IN
High Efficiency 4mm Tall Transformer
100k
LT3468 Photoflash Charger Uses
TRAINED PERSONNEL ONLY
4.7µF
U
DONE
CHARGE
V
IN
LT3468
SW
GND
U
1
2
1:10.2
4
5
IN
IN
IN
= 3.6V)
+
= 3.6V)
= 3.6V)
346812 TA01
100µF
320V
DESCRIPTIO
The LT
ICs designed to charge photoflash capacitors in digital and
film cameras. A patented control technique* allows for the
use of extremely small transformers. Each device contains
an on-chip high voltage NPN power switch. Output voltage
detection* is completely contained within the device,
eliminating the need for any discrete zener diodes or
resistors. The output voltage can be adjusted by simply
changing the turns ratio of the transformer. The LT3468
has a primary current limit of 1.4A, the LT3468-2 has a 1A
limit, and the LT3468-1 has a 0.7A limit. These different
current limit levels result in well controlled input currents
of 500mA for the LT3468, 375mA for the LT3468-2 and
225mA for the LT3468-1. Aside from the differing current
limit, the three devices are otherwise equivalent.
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
LT3468 series of parts are available in tiny low profile
(1mm) SOT-23 packages.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Protected by U.S. Patents, including 6518733.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LT3468/LT3468-1/LT3468-2
®
3468/LT3468-1/LT3468-2 are highly integrated
Photoflash Capacitor
CURRENT
AVERAGE
Chargers in ThinSOT
50V/DIV
1A/DIV
INPUT
V
OUT
V
C
IN
OUT
U
LT3468 Charging Waveform
= 3.6V
= 100µF
1s/DIV
3468 G01
346812fa
1
TM

Related parts for LT3468ES5-1

LT3468ES5-1 Summary of contents

Page 1

... The LT3468 series of parts are available in tiny low profile (1mm) SOT-23 packages. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...

Page 2

... Note 3: Specifications are for static test. Current limit in actual application will be slightly higher ORDER PART NUMBER LT3468ES5 5 VIN LT3468ES5-1 LT3468ES5-2 4 CHARGE S5 PART MARKING LTAEC LTAGQ LTBCH MIN TYP MAX ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS curves use the circuit of Figure 7 and LT3468-2 use the circuit of Figure 8 unless otherwise noted. LT3468 Charging Waveform 100µF OUT V OUT 50V/DIV AVERAGE ...

Page 4

LT3468/LT3468-1/LT3468 TYPICAL PERFOR A CE CHARACTERISTICS curves use the circuit of Figure 7 and LT3468-2 use the circuit of Figure 8 unless otherwise noted. LT3468 Efficiency 25° 4. ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS curves use the circuit of Figure 7 and LT3468-2 use the circuit of Figure 8 unless otherwise noted. LT3468 Switching Waveform 100V OUT V SW 10V/DIV I ...

Page 6

LT3468/LT3468-1/LT3468 CTIO S SW (Pin 1): Switch Pin. This is the collector of the internal NPN Power switch. Minimize the metal trace area con- nected to this pin to minimize EMI. Tie one side of ...

Page 7

U OPERATIO The LT3468/LT3468-1/LT3468-2 are designed to charge photoflash capacitors quickly and efficiently. The opera- tion of the part can be best understood by referring to Figure 1. When the CHARGE pin is first driven high, a one shot sets ...

Page 8

... SW pin, the parasitic capacitance of the transformer would become large. This will adversely effect the charge time of the photoflash circuit. Linear Technology has worked with several leading mag- netic component manufacturers to produce pre-designed flyback transformers for use with the LT3468/LT3468-1/ ...

Page 9

U U APPLICATIO S I FOR ATIO Table 2. Pre-Designed Transformers - Typical Specifications Unless Otherwise Noted. FOR USE WITH TRANSFORMER NAME LT3468/LT3468-2 SBL-5.6-1 LT3468-1 SBL-5.6S-1 LT3468 LDT565630T-001 LT3468-1 LDT565630T-002 LT3468-2 LDT565630T-003 LT3468/LT3468-1 T-15-089 LT3468-1 T-15-083 Capacitor Selection For the ...

Page 10

LT3468/LT3468-1/LT3468 APPLICATIO S I FOR ATIO should be a Schottky diode with at least a 500mA peak forward current capability. The diode forward voltage drop should be 600mV or less at 500mA of forward current. Reverse voltage rating ...

Page 11

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LT3468/LT3468-1/LT3468-2 ...

Page 12

... OUT (V) IN 3468 TA06 : 2.5V to 5.5V 0.6V 40µA, IN OUT(MIN 90µ <1µA, MS10 0.5V to 4.5V 5.25V 12µA, IN OUT(MIN 2.5V to 5.5V 2.5V to 5.5V, IN OUT(MIN) : <1µA, MS-10, DFN-12 SD LT/TP 0105 1K REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2003 346812fa ...

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