LT3484
Info: : PRODUCTION
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LT3484

Photoflash Capacitor Charger

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $2.61
Features
  • Highly Integrated IC in 2mm × 3mm DFN Package Reduces Solution Size
  • Uses Small Transformers:
    • 5.8mm × 5.8mm × 3mm
  • Fast Photoflash Charge Times:
    • 4.6s for LT3484-0 (0V to 320V, 100µF, VIN = 3.6V)
    • 5.7s for LT3484-2 (0V to 320V, 100µF, VIN = 3.6V)
    • 5.5s for LT3484-1 (0V to 320V, 50µF, VIN = 3.6V)
  • Operates from Two AA Batteries, or Any Supply from 1.8V up to 16V
  • Controlled Average Input Current
    • 500mA (LT3484-0)
    • 350mA (LT3484-2)
    • 225mA (LT3484-1)
  • No Output Voltage Divider Needed
  • No External Schottky Diode Required
  • Charges Any Size Photoflash Capacitor
  • Available in 6-Lead 2mm × 3mm DFN Package
Additional Details
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The LT3484 family of photoflash capacitor charger ICs is designed for use in digital camera and mobile phone applications where space is at a premium. The LT3484's patented control technique allows it to use extremely small transformers, and the improved NPN power switch requires no external Schottky diode clamp, reducing solution size. Output voltage detection requires no external circuitry as the transformer turns ratio determines final charge voltage.

The devices feature a VBAT pin, which allows the use of 2 alkaline cells to charge the capacitor. The LT3484-0, -2 and -1 have primary current limits of 1.4A, 1A and 0.7A respectively, resulting in tightly controlled average input current of 500mA, 350mA and 225mA respectively. The three versions are otherwise identical.

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 LT3484 series of parts are housed in a tiny low profile 2mm × 3mm DFN package.

Applications

  • Digital Camera and Cell Phone Flash Charger
Part Models 6
1ku List Price Starting From $2.61

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3484EDCB-0#TRMPBF
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LT3484EDCB-0#TRPBF
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LT3484EDCB-1#TRMPBF
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LT3484EDCB-1#TRPBF
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LT3484EDCB-2#TRMPBF
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LT3484EDCB-2#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

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DC855A-A

LT3484EDCB-0 | Photoflash Charger, VIN = 2.8V to 4.2V, VBAT = 1.8V to 4.2V, 5V Max

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DC855A-B

LT3484EDCB-1 | Photoflash Charger, VIN = 2.8V to 4.2V, VBAT = 1.8V to 4.2V, 5V Max

reference details image

DC855A-C

LT3484EDCB-2 | Photoflash Charger, VIN = 2.8V to 4.2V, VBAT = 1.8V to 4.2V, 5V Max

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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