FC250F1 MACOM | Alldatasheet
Document overview
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Technical content
Features
n Size: 61.0 mm x 116.8 mm x 13.5 mm n Wide input voltage range n High efficiency: 78% typical n Parallel operation with load sharing n Adjustable output voltage n Overtemperature protection n Output voltage set-point adjustment (trim) n Synchronization n Power good signal n Output current monitor n Output overvoltage and overcurrent protection n Remote sense n Remote on/off n Constant frequency n Case ground pin n Input-to-output isolation n ISO * 9001 Certified manufacturing facilities n UL 1950 Recognized, CSA C22.2 No. 950-95 Certified, and VDE 0805 (EN60950, IEC950) Licensed
Description
The FC250F1 Power Module is a dc-dc converter that operates over an input voltage range of 18 Vdc to 36 Vdc and provides a precisely regulated dc output. The outputs are fully isolated from the inputs, allowing versatile polarity configurations and grounding connections. The module has a maximum power rating of 165 W at a typ- ical full-load efficiency of 78%. Two or more modules may be paralleled with forced load sharing for redundant or enhanced power applications. The package, which mounts on a printed-circuit board, accommodates a heat sink for high-temperature applications. ISO is a registered trademark of the International Organization of Standardization. UL is a registered trademark of Underwriters Laboratories, Inc. CSA is a registered trademark of Canadian Standards Association. §VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
periods can adversely affect device reliability. Table 1. Input Specifications CAUTION: This power module is not internally fused. An input line fuse must always be used. safety agencies require a normal-blow fuse with a maximum rating of 25 A (see Safety Considerations section). type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data for further information.
Table 2. Output Specifications
- Consult your sales representative or the factory.
† These are manufacturing test limits. In some situations, results may differ.
Table 3. Isolation Specifications conditions. See Feature Descriptions for further information. Table 4. Feature Specifications
- These are manufacturing test limits. In some situations, results may differ.
Figure 5. Typical FC250F1 Transient Response to
28 V Input (Waveform Averaged to
Figure 6. Typical FC250F1 Transient Response to Figure 7. Typical FC250F1 Start-Up Transient at
Tyco Electronics Corp. 11 Data Sheet July 2000 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W FC250F1 Power Module: dc-dc Converter; Feature Descriptions (continued) Output Overvoltage Protection The output voltage is monitored at the V O (+) and V O (–) pins of the module. If the voltage at these pins exceeds the value indicated in the Feature Specifications table, the module will shut down and latch off. Recovery from latched shutdown is accomplished by cycling the dc input power off for at least 1.0 second or toggling the primary referenced on/off signal for at least 1.0 second. Output Current Monitor The CURRENT MON pin provides a dc voltage propor- tional to the dc output current of the module given in the Feature Specifications table. For example, on the FC250F1, the V/A ratio is set at 67 mV/A 10% @ C case. At a full load current of 50 A, the voltage on the CURRENT MON pin is 3.685 V. The current moni- tor signal is referenced to the SENSE(–) pin on the secondary and is supplied from a source impedance of approximately 2 k W . It is recommended that the CUR- RENT MON pin be left open when not in use, although no damage will result if the CURRENT MON pin is shorted to secondary ground. Directly driving the CUR- RENT MON pin with an external source will detrimen- tally affect operation of the module and should be avoided. Synchronization Any module can be synchronized to any other module or to an external clock using the SYNC IN or SYNC OUT pins. The modules are not designed to operate in a master/slave configuration; that is, if one module fails, the other modules will continue to operate. SYNC IN Pin This pin can be connected either to an external clock or directly to the SYNC OUT pin of another FC250x mod- ule. If an external clock signal is applied to the SYNC IN pin, the signal must be a 500 kHz (±50 kHz) square wave with a 4 Vp-p amplitude. Operation outside this frequency band will detrimentally affect the perfor- mance of the module and must be avoided. If the SYNC IN pin is connected to the SYNC OUT pin of another module, the connection should be as direct as possible, and the V I (–) pins of the modules must be shorted together. Unused SYNC IN pins should be tied to V I (–). If the SYNC IN pin is unused, the module will operate from its own internal clock. SYNC OUT Pin This pin contains a clock signal referenced to the V I(–) pin. The frequency of this signal will equal either the mod- ule’s internal clock frequency or the frequency estab- lished by an external clock applied to the SYNC IN pin. When synchronizing several modules together, the modules can be connected in a daisy-chain fashion where the SYNC OUT pin of one module is connected to the SYNC IN pin of another module. Each module in the chain will synchronize to the frequency of the first module in the chain. To avoid loading effects, ensure that the SYNC OUT pin of any one module is connected to the SYNC IN pin of only one module. Any number of modules can be synchronized in this daisy-chain fashion. Overtemperature Protection To provide protection in a fault condition, the unit is equipped with an overtemperature shutdown circuit. The shutdown circuit will not engage unless the unit is operated above the maximum case temperature. Recovery from overtemperature shutdown is accomplished by cycling the dc input power off for at least 1.0 second or toggling the primary referenced on/ off signal for at least 1.0 second. Forced Load Sharing (Parallel Operation) For either redundant operation or additional power requirements, the power modules can be configured for parallel operation with forced load sharing (see Figure 17). For a typical redundant configuration, Schottky diodes or an equivalent should be used to protect against short-circuit conditions. Because of the remote sense, the forward-voltage drops across the Schottky diodes do not affect the set point of the voltage applied to the load. For additional power requirements, where multiple units are used to develop combined power in excess of the rated maximum, the Schottky diodes are not needed.
sink-to-ambient (qsa) as shown in Figure 24. Figure 24. Resistance from Case-to-Sink and Sink- a conservative estimate for such instances.
16 Tyco Electronics Corp. Data Sheet July 200018 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W FC250F1 Power Module: dc-dc Converter; Outline Diagram Dimensions are in millimeters and (inches). 8-1650 (C).a * Side label includes Tyco name, product designation, safety agency markings, input/output voltage and current ratings, and bar code. Top View Side View Bottom View CASE SYNC IN ON/OFF VI– VI+ 2.54 (0.100) TYP VO – VO + SYNC OUT SENSE– SENSE+ TRIM PARALLEL CURRENT MON PWR GOOD 5.1 (0.20) 50.8 (2.00) 30.48 (1.200) 22.86 (0.900) 12.7 (0.50) 5.08 (0.200) 10.16 (0.400)15.24 (0.600) 20.32 (0.800) 25.40 (1.000) 30.48 (1.200) 35.56 (1.400) 66.04 (2.600) MOUNTING INSERTS M3 x 0.5 THROUGH,
4 PLACES
5.1 (0.20) 2.54 (0.100) TYP 106.68 (4.200) 7.62 (0.300) 17.78 (0.700) 12.70 (0.500) 13.5 (0.53) 5.1 (0.20) MIN SOLDER-PLATED BRASS,
11 PLACES
(VOUT–, VOUT+, VIN–, VIN+) SOLDER-PLATED BRASS,
9 PLACES
SIDE LABEL* 116.8 (4.60) 61.0 (2.40)
Tyco Electronics Corp. 17 Data Sheet July 2000 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W FC250F1 Power Module: dc-dc Converter; Recommended Hole Pattern Component-side footprint. Dimensions are in millimeters and (inches). 8-1650 (C).a
Ordering Information
Table 5. Device Codes
Tyco Electronics Corp. 19 Data Sheet July 2000 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W FC250F1 Power Module: dc-dc Converter; Notes
July 200018 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W FC250F1 Power Module: dc-dc Converter; Printed on Recycled Paper Tyco Electronics Power Systems, Inc.
3000 Skyline Drive, Mesquite, TX 75149, USA
+1-800-526-7819 FAX: +1-888-315-5182 http://power.tycoeleectronics.com Tyco Electronics Corportation reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. © 2001 Tyco Electronics Corporation, Harrisburg, PA. All International Rights Reserved. Printed in U.S.A. July 2000 DS99-265EPS