5V/12V DC-DC Converters

Description & Specifications

The Freefly DC-DC converters draw power from the 50V battery bus and provide up to 120W of 5V or 12V DC. The converters utilize off the shelf converters mounted on a custom heatsink with and a custom capacitor board to provide better transient response.

Spec	12V	5V
Operating input voltage range	18-75VDC	18-75VDC
Output voltage	12VDC	5VDC
Max output current (Note 1)	10A	24A
Max output power (Note 1)	120W	120W
Recommended max output power	100W	100W
Operating Temperature	-40C to 85C	-40C to 85C
Input power connector	XT30 (Male Pins)	XT30 (Male Pins)
Output power connector	XT60 (Female Sockets)	XT60 (Female Sockets)
Weight with Wires/ Plugs	105 grams	105 grams

Note 1: Above ambient temperatures of 50C, some current/power derating will be necessary.

The DC-DC converter output is isolated, so the "return" power connection is not tied to the AltaX ground. If you are connecting to a data link in AltaX (such as UART), you must run the ground line in the data connection (ie. pin 6 in UART connection or pin 4 of CAN).

Failure to properly ground modules connected to the isolated DC-DC converters may result in spotty or non-functional connection.

Installation

The converter mounts onto any unused closeout. Installation steps:

1.	Remove two screws holding closeout door, remove closeout door
2.	Install DC-DC converter using supplied button-head screws
3.	Route & connect XT30 connector to inside of the power expansion board
4.	Route XT60 connector to desired location

The internal XT30s of the power expansion board share the same 10A fuse as J1.

Operation Notes

The power converter will power on automatically as soon as the battery is connected on the aircraft.

• The power converter will power on automatically as soon as the battery is connected on the aircraft.

• The converters have overcurrent & short circuit protection, and will restart automatically upon clearing of overcurrent/short circuit condition.

Caution! The DC-DC converter heatsink may get very hot when drawing power.