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Datasheet Linear Technology LT3485-3

ManufacturerLinear Technology

Photoflash Capacitor Chargers with Output Voltage Monitor and Integrated IGBT Drive


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    LT3485-0/LT3485-1/LT3485-2/LT3485-3 - Photoflash Capacitor Chargers with Output Voltage Monitor and Integrated IGBT Drive
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    Photoflash Capacitor
    Chargers with Output Voltage
    Monitor and Integrated IGBT Drive U DESCRIPTIO FEATURES The LTВ®3485 family of photoflash chargers are highly integrated 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 VBAT pin, which allows
    the use of two AA cells to charge the capacitor. The internal
    circuitry operates from the VIN 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 respectively. These different current limits result in tightly controlled
    input currents. Integrated IGBT Driver
    Voltage Output Monitor
    Uses Small Transformers: 5.8mm Г— 5.8mm Г— 3mm
    Operates from Two AA Batteries, Single Cell Li-Ion
    or Any Supply from 1.8V up to 10V ...



Package3x3 DFN-103x3 DFN-10
Package CodeDDDD


Demo BoardsDC895A-A,DC895A-B,DC895A-CDC895A-A,DC895A-B,DC895A-C
Design ToolsLTspice FileLTspice File
Export Control, yes/nonono
Integrated Inductor, yes/nonono
Ishutdown, µA11
Isupply, mA55
Monolithic, yes/noyesyes
Number of Outputs11
Operating Temperature Range, °C0 to 850 to 85
Polyphase, yes/nonono
Switch Current, A1.71.7
Synchronous, yes/nonono
TopologyFlyback, PhotoflashFlyback, Photoflash
Vin Max, V1010
Vin Min, V1.81.8

Eco Plan


Other Options

LT3485-0 LT3485-1 LT3485-2

Moldel Line

Series: LT3485-3 (2)

Manufacturer's Classification

  • Power Management > Switching Regulator > Xenon Photoflash Charger

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