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Series F/M

Product catalog summary

Product Overview
The Series F/M DC-DC converters are isolated units available in a full brick size, supporting input voltage ranges from 18V to 380V. They include features such as trim capability, shutdown options, and multiple protections like input overvoltage, output short-circuit, output overvoltage, and over temperature. An integrated side heat sink aids in thermal dissipation, supporting conduction cooling.

Features

Input voltage range: 18V to 380V
Output voltage range: 3.3V to 350V
Output power up to 200W
Input/output isolation
Parallel operation option
Single and dual isolated outputs
Trim capability and remote shutdown
Fixed operating frequency
No external components required

Specifications
Input

Voltage ranges: FA/MA (18-36V), FB/MB (36-72V), FC/MC (100-180V), FD/MD (200-380V)

Output

Ripple: ≤100V models - 50 mVp-p, ≥125V models - 1%

Environmental

Operating temperature: F models (-40°C to +85°C), M models (-55°C to +85°C)
Storage temperature: -55°C to +105°C
Cooling: Conduction through baseplate

General

Operating frequency: 100 kHz
Isolation voltage: Input to output 4242 VDC
Size: 4.6 x 2.5 x 0.5 inches
Weight: ≤48V models - 210g, ≥100V models - 220g, Dual output models - 235g

Protections & Features

Input overvoltage protection
Short circuit or overload protection with self-recovery
Overtemperature protection with shutdown and restart
Output overvoltage protection with Zener diode clamp
Output voltage trim capability
Parallel operation for load sharing and redundancy

Options Available

Expanded operating temperature range: -55°C to +85°C
Screening per MIL-STD-883 including stabilization bake, temperature cycle, and burn-in

Thermal Resistance

Free air: 5.1°C/W
200 LFM: 2.8°C/W
400 LFM: 1.8°C/W
600 LFM: 1.4°C/W
800 LFM: 1.2°C/W
1000 LFM: 1°C/W

Overview
The document provides technical specifications, derating graphs, connection circuits, mechanical drawings, and warranty information for Pico Electronics' Series F/M High Power DC-DC converters. These converters are designed for high efficiency and power output, with various models offering different maximum power and efficiency levels.

Specifications
The document outlines models with maximum output powers of 75W and 100W, with efficiencies ranging from 78% to 88% at full load. The thermal resistance from case to air is a critical parameter, affecting the power output based on ambient temperature and cooling methods.

Derating Graphs
Graphs illustrate the relationship between power output and ambient temperature for different cooling configurations, such as baseplate and heat sink options with varying airflow rates (measured in LFM - Linear Feet per Minute).

Typical Connection Circuit
The document provides a schematic for connecting the DC-DC converters, including trim up and trim down resistances for output voltage adjustment. Recommendations include using a 1MΩ multi-turn trimmer potentiometer for precise resistance value determination.

Mechanical Drawings
Detailed mechanical drawings are provided for single and dual output models, including pin functions and dimensions. The recommended torque for mounting screws is specified, and the drawings include views of the bottom and top of the units.

Heat Sink Assembly
The document describes the components of the heat sink assembly, including the heat sink, thermal interface, F/M module, and PCB. Dimensions and assembly details are provided.

Warranty Information
Pico Electronics offers a one-year warranty against defects in material and workmanship. The warranty is limited to repair or replacement and excludes liability for consequential damages or usage outside the product's specifications.

Catalog excerpts

The F/M series are isolated DC-DC converters with a wide selection of input voltage ranges from 18V to 380V in a low profile full brick size - 4.6" x 2.5" x 0.5". These modules have trim capability and shutdown features. Protections include input overvoltage, output short-circuit, output overvoltage and over temperature. The unique case has integrated side heat sink for better thermal dissipation but is capable of conduction cooling through the baseplate or additional top mounted heat sink. • 18V to 380V input range models • Input/output isolation • Parallel operation option • Single and dual isolated outputs • Trim capability • Remote shutdown feature • Fixed operating frequency • No external components required Contact Pico for part number of available options: • Expanded operating temperature: -55°C to +85°C Stabilization Bake Temperature Cycle Burn-In • Special Input Voltage, Output Voltage, Isolation Voltage or Output Power • Parallel Operation

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High Power DC-DC PICO MODEL LIST - FA/MA (18-36V INPUT RANGE) Note 1: Maintain minimum 10% of rated load to prevent a voltage surge. Note 2: Tested at nominal input voltage and full output load. Note 3: Line regulation is specified at full output load, nominal to minimum input voltage (-%) and nominal to maximum input voltage (+%). Note 4: For <100V output models, load regulation is specified at nominal input voltage, 50% to 10% load (+%) and 50% to 100% load (-%). For >125V output models, load regulation is specified at nominal input voltage, 50% to 20% load (+%) and 50% to 100% load (-%). Note...

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High Power DC-DC PICO MODEL LIST - FB/MB (36-72V INPUT RANGE) Note 1: Maintain minimum 10% of rated load to prevent a voltage surge. Note 2: Tested at nominal input voltage and full output load. Note 3: Line regulation is specified at full output load, nominal to minimum input voltage (-%) and nominal to maximum input voltage (+%). Note 4: For <100V output models, load regulation is specified at nominal input voltage, 50% to 10% load (+%) and 50% to 100% load (-%). For >125V output models, load regulation is specified at nominal input voltage, 50% to 20% load (+%) and 50% to 100% load (-%). Note...

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High Power DC-DC PICO MODEL LIST - FC/MC (100-180V INPUT RANGE) Note 1: Maintain minimum 10% of rated load to prevent a voltage surge. Note 2: Tested at nominal input voltage and full output load. Note 3: Line regulation is specified at full output load, nominal to minimum input voltage (-%) and nominal to maximum input voltage (+%). Note 4: For <100V output models, load regulation is specified at nominal input voltage, 50% to 10% load (+%) and 50% to 100% load (-%). For >125V output models, load regulation is specified at nominal input voltage, 50% to 20% load (+%) and 50% to 100% load (-%)....

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High Power DC-DC PICO MODEL LIST - FD/MD (200-380V INPUT RANGE) Note 1: Maintain minimum 10% of rated load to prevent a voltage surge. Note 2: Tested at nominal input voltage and full output load. Note 3: Line regulation is specified at full output load, nominal to minimum input voltage (-%) and nominal to maximum input voltage (+%). Note 4: For <100V output models, load regulation is specified at nominal input voltage, 50% to 10% load (+%) and 50% to 100% load (-%). For >125V output models, load regulation is specified at nominal input voltage, 50% to 20% load (+%) and 50% to 100% load (-%)....

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High Power DC-DC PICO SPECIFICATIONS (Nominal V|N, Full Load, TA = +25°C, 1 hour warm up unless otherwise specified) Note 6: The parallel option allows units to operate the outputs in parallel to share load, increase total power or allow for N+1 redundancy.

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High Power DC-DC PICO SPECIFICATIONS (Nominal V|N, Full Load, TA = +25°C, 1 hour warm up unless otherwise specified) DERATING GRAPHS (Nominal VIN, Full Load, Efficiency @ Full Load) Ambient Temperature (° C) Ambient Temperature (° C)

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High Power DC-DC PICO DERATING GRAPHS Models with Max. Output Power = 100W Models with Max. Output Power = 100W & Efficiency at full load = 85% & Efficiency at full load = 86% Models with Max. Output Power = 100W & Efficiency at full load = 87% Models with Max. Output Power = 100W & Efficiency at full load = 88% Ambient Temperature (° C)Ambient Temperature (° C)TYPICAL CONNECTION CIRCUIT TRIM TRIM DOWNO' —\AAA-R +INTRIMTRIM UP-IN O' R TRIM DOWN +IN TRIM DOWN TRIM -IN A VOUT Note: Each individual unit will vary slightly. It is recommended to use a 1MQ multi-turn trimmer potentiometer to determine...

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High Power DC-DC TYPICAL CONNECTION CIRCUIT NOISE REDUCTION C1 (7) TRIM DOWN TRIM Note 7: C1 filter capacitors may reduce noise further. Please contact Pico for more details. SHUTDOWN NON-ISOLATED

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High Power DC-DC MECHANICAL DRAWINGS ≤48V SINGLE OUTPUT MODELS .500 [12.700] TRIM DOWN SHUT DOWN TRIM DOWN BOTTOM VIEW ≥100V SINGLE OUTPUT MODELS .500 [12.700] SHUT DOWN BOTTOM VIEW NOTES a. ALL DIMENSIONS ARE IN INCHES, [ ] = MM b. RECOMMENDED TORQUE FOR MOUNTING SCREWS: 6-9 INCH-LBS 2026 REV 2 www.PicoElectronics.com | Se

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High Power DC-DC MECHANICAL DRAWINGS DUAL OUTPUT MODELS .500 [12.700] TRIM DOWN SHUT DOWN BOTTOM VIEW NOTESv a. ALL DIMENSIONS ARE IN INCHES, [ ] = MM b. RECOMMENDED TORQUE FOR MOUNTING SCREWS: 6-9 INCH-LBS

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High Power DC-DC MECHANICAL DRAWINGS THERMAL INTERFACE BOTTOM VIEW Material Alloy Aluminum Substrate Thermal Conductivity Coefficient of Thermal Expansion, (25-100°C) Brinell Hardness Endurance Limit Standard Thickness HEAT SINKS TOP VIEW 2.100 [53.340] Weight: 145 grams typical 2026 REV 2

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High Power DC-DC PICO MECHANICAL DRAWINGS HEAT SINK ASSEMBLY

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High Power DC-DC TUBE PACKAGING UNSEALED TUBE PACKAGE TUBE PLUG TUBE PLUG POWER SUPPLY Pico warrants each product manufactured by us and sold by us or an authorized representative, to be free from defects in material and workmanship. If properly used, it will perform within its applicable specifications for a period of one year after original shipment. Pico’s obligation under this guarantee is limited to repairing or replacing our product to the original purchaser. This warranty is in lieu of all other warranties, express or implied and constitutes fulfillment of our obligations to the purchaser....

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