LT3420EDD-1#TRPBF

Power Management - Specialized Overview

The LT3420EDD-1#TRPBF is a photoflash capacitor charger IC manufactured by Analog Devices Inc. It utilizes a flyback topology to efficiently charge high-voltage capacitors from low input voltages ranging from 1.8 V to 16 V. The device delivers an output current of 1 A and operates with a fixed switching frequency of 1 kHz. It features a very low quiescent current of 10 nA, ensuring minimal power consumption during standby. The component is housed in a 10-pin DFN package and supports operation across an extended temperature range from -40°C to +85°C.

Power Management - Specialized Feature Summary

• Employs adaptive off-time control algorithm to maintain current-limited continuous mode transformer operation throughout the entire charging cycle.
• Designed specifically for rapid and efficient charging of high-voltage photoflash capacitors in digital and film cameras.
• Integrates shutdown functionality to minimize system power consumption when not in active use.

Power Management - Specialized Applications

• Digital camera flash modules
• Film camera flash circuits
• High-voltage capacitor charging systems

Power Management - Specialized Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging versus the tube variant #PBF. Confirm the manufacturer part number matches exactly, as Analog Devices distinguishes between standard and military/extended grades (e.g., MP) which may have different electrical specifications or reliability ratings. Ensure the supplier provides valid traceability documentation for this specific batch.

Power Management - Specialized Selection Notes

Select this component when designing compact flash circuits requiring high efficiency compared to competing modules. The flyback topology allows for significant size reduction. Consider the 1.8 V minimum input voltage compatibility with single-cell battery systems. Evaluate thermal performance within the DFN-10 package for the intended power dissipation levels in the target application environment.

Power Management - Specialized Part Context

This part belongs to the LT3420 family of specialized power management ICs designed for camera applications. It serves as a dedicated solution for generating the high voltages required for xenon flash tubes. The family includes variants like the LT3420EDD without the '-1' suffix, which may differ in internal timing or control parameters. It is distinct from general-purpose boost converters due to its optimized control loop for capacitor charging profiles.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Designers should consult Analog Devices technical support for direct replacements or evaluate generic flyback controllers if pin-out compatibility is not required.