LT3468
Info: : PRODUCTION
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LT3468

Photoflash Capacitor Chargers in ThinSOT

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $2.63
Features
  • Highly Integrated IC Reduces Solution Size
  • Uses Small Transformers:
    • 5.8mm × 5.8mm × 3mm
  • Fast Photoflash Charge Times:
    • 4.6s for LT3468 (0V to 320V, 100µF, VIN = 3.6V)
    • 5.7s for LT3468-2 (0V to 320V, 100µF, VIN = 3.6V)
    • 5.5s for LT3468-1 (0V to 320V, 50µF, VIN = 3.6V)
  • Controlled Input Current:
    • 500mA (LT3468)
    • 375mA (LT3468-2)
    • 225mA (LT3468-1)
  • 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
Additional Details
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The LT3468/LT3468-1/LT3468-2 are highly integrated 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.

Applications

  • Digital / Film Camera Flash
  • PDA / Cell Phone Flash
  • Emergency Strobe
Part Models 6
1ku List Price Starting From $2.63

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3468ES5#TRMPBF
  • HTML
  • HTML
LT3468ES5#TRPBF
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  • HTML
LT3468ES5-1#TRMPBF
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  • HTML
LT3468ES5-1#TRPBF
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  • HTML
LT3468ES5-2#TRMPBF
  • HTML
  • HTML
LT3468ES5-2#TRPBF
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 6

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DC711A-C

LT3468ES5-2 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 1.0A

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DC661A-A

LT3468ES5 | Photoflash Capacitor Charger High Voltage Supply, 2.8V to 8VIN, 320VOUT

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DC711A-A

LT3468ES5 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 1.4A

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DC661A-B

LT3468ES5-1 | Photoflash Capacitor Charger High Voltage Supply, 2.8V to 8VIN, 320VOUT

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DC796A

LT3468ES5-1 | Cell Phone Photoflash Charger, VIN(5V Max), 2.8V to 4.2V

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DC711A-B

LT3468ES5-1 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 0.7A

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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