FLHGI-90

An input EMI filter removing both common and differential input conducted noise to comply EN550155/EN 55022 EMC Standards.
An input spike & surge limiter to comply EN50155/61000 and RIA12 over-voltages.
A reverse polarity protection.
A soft start function.
An hold-up function.
A synchronization output function.
An ASP function that protects application from abnormal surge, bit switching off the down-converter supply.
Leveraging so many functions, the FLGHI-90 advantageously replaces all the input stage components of a power architecture such as filters, voltage limiter, ideal diodes, inrush current limiter and hold up modules. As a single component, the FLHGI-90 allows for a drastic reduction in space, as well as an incredible simplification of the power architecture design. 
Thanks to its wide input range, the input bus conditioner operates with all standard batteries voltages, according to 3 modes of operation: 
- Normal operation: When input bus voltage is within its steady state range, the FLHGI-90 acts like a buffer that transmits the input power to the DC/DC architecture with low losses, and conducted noise filtering. 
- Transient operation: The FLHGI-90 clamps input transient, limiting its output voltage to the maximum voltage value acceptable by downstream DC/DC architecture. In addition, if transient operation enters an abnormal condition of voltage value or duration, an Abnormal Surge Protection function (ASP) shuts down FLHGI-90 output voltage to protect the downstream converter architecture. 
- Hold-Up operation: The hold-up operation occurs when the input bus drops below a low voltage level determined by a simple external resistor. In this case,  the FLHGI-90 connects the down stream converter input bus to the charged hold-up capacitor in order to pursue operation during application input bus drop. 
The module is potted with a bi-component thermal conductive compound and packaged in a metallic case to ensure the module's integrity under severe environmental conditions.