This article introduces the working principle and characteristics of LTC4354 negative voltage diode-OR controller. This controller can accept inputs up to 100V and has overcurrent protection function. In order to adapt to inputs higher than 100V, a variety of methods can be used to improve the controller, such as increasing series resistance, using Zener diodes for clamping, and using high-voltage MOSFETs for clamping.
The document introduces the LTC4354 negative voltage diode-OR controller, highlighting its design for operation with inputs up to 100V. It explains that while drain pins are limited to 80V, they can handle higher voltages (up to 100V) when used with a series limiting resistor.
| Maximum Input Voltage | 100V |
|---|---|
| Maximum Differential Voltage (Standard) | 100V |
The drain pin voltage limit can be extended beyond 100V by adding a Zener clamp and using a series limiting resistor.
A series resistor, typically 2k, provides current limiting for the Zener clamp.