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IPM Series
Evaluation Procedure
(DEP-003)
The IPM- C Series POL converters
The IPM Series, single output, non-isolated
point of load DC/DC converters, are the latest
offering from a world leader in power systems
technology and manufacturing ― Delta
Electronics, Inc. They operate from a
3V~5.5V (IPM04C) or an 8V~14V (IPM12C)
source and provide a programmable output
voltage of 0.8V to 3.3V(IPM04C) or 0.8V to
5V(IPM12C).
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3.0 Equipment Required ․ DC Power Supply 0 - 20 V @ 0 - 20A (Agilent 6574A 0 -60V/0 - 35A or equivalent). ․Oscilloscope (Tektronix TDS 460A or equivalent) 4 Channel 400 MHz, equipped with a x1 scope probe, a x10 scope probe, and two BNC cables (length less than 20 inches/500mm) ․Digital multimeters, one with 20A range and ideally all with 4 1/2 digit resolution (DVM1, DVM2 and DVM3) (Zentech 2041 or equivalent). ․ Electronic load (Chroma 63030 or equivalent), 300W approx rati
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4.1 Connect one lead from the “+” lead of the power supply to the “20A” terminal of the first multimeter DMM1. Then connect one lead from the “Common” of the DMM1 to the “Vin” pin of the Evaluation Board. Set function of DMM1 to DCA to measure the input current. 4.2 Connect one wire from the “-” lead of the power supply (Item 3.1) to the “Vin-“ pin of the Evaluation Board. Note: Use stranded leads at least equivalent to 14 AWG for all connections in sections 4.1 and 4.2. 4.3 Conn
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6.0 Tests Performed The following tests are performed at room temperature (+25 C). 6.1 Input Characteristics Input Voltage Range. Under-Voltage Lockout. No Load Input Current. 6.2 Output Characteristics Line Regulation. Load Regulation. Output Regulation. Output Voltage Set-Point Adjustment Range. 6.3 Dynamic Characteristics Maximum Output Voltage Deviation (due to step change in load). Turn on Response time. 6.4 Thermal Characteristic Efficiency 7.0 Test
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6) SW3 is used for the trim-down or trim-up setting of the Output Voltage. For IPM, if the converter requires a trim up, set SW3 to the Trim-up position. If the converter requires a trim down, set SW3 to the Trim-down position. For normal operating, turn off the SW3. 7) SW4 and SW5 are used for the Output Voltage Set-Point Adjustment by external resistors. For IPM12C0A0R04A, if the converter requires a trim-up to 5V, set the SW4_1 to ON position and SW3 to trim-up position. If the conv
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7.2 Initial Power Up 1) Turn the power supply ON, set the current limit on power supply (refer to specification of either converter) and increase the input voltage (use DMM2 to monitor the voltage) until it reaches the desired value. 2) Set the switch SW1 to “OFF” position to enable the power module. 3) The converter is now operating, which can be verified by observing the DMM3 (appropriate value for the nominal output voltage) and channel 2 of the oscilloscope (appropriate value fo
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8.2 Output Characteristics 8.2.1 Line Regulation Line Regulation Deviation is defined as the change in output voltage caused by varying the input voltage over a specified range while the output load and temperature remain constant. Test 1) Turn on the fan. 2) Set the output power to the desired operating point. 3) Set the switch SW1 to the “OFF” position to enable the converter. 4) Adjust the input voltage across the converter’s input range (refer to specified range) while
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8.2.4 Output Voltage Set-Point Adjustment Range (Trim) Output Voltage Set-Point Adjustment can be carried out by using an external resistor or external voltage source to increase or decrease the output voltage set-point (please refer to the data sheet for the detailed specification). Refer all trim voltage requirements to Item 7.1-6, 7.1-7, 7.1.8, and refer all the design numbers to Evaluation Board Schematic. (1) Output Voltage Set-Point Adjustment by using an external resistor
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For IPM04C series To implement Trim-up by using an external resistor, R must be connected between the trim-up TRIM pin and ground. For IPM04C0A0R06A, Please refer to the IPMR table for the desired Vout. The value of R can be calculated by the following equation and the datasheet can trim-up also be referred for further information. 7.0 R = − 0.187 k Ω trim −up V − 0.9 out To implement Trim-down by using an external resistor, R must be connected between trim-down the T
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(2) Output Voltage Set-Point Adjustment by using an external voltage source For IPM12C series Output voltage of IPM12C is programmable while applying a voltage between the TRIM and GND pins. The following equation can be used to determine the value of Vtrim needed for a desired output voltage Vo: Vtrim = 0.7439 – 0.0488Vo Vtrim is the external voltage in V Vo is the desired output voltage For example, to program the output voltage of a IPM module to 3.3 Vdc, Vtrim is ca
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8.3 Dynamic Characteristics 8.3.1 Output Voltage Deviation Output Voltage Deviation is defined as the response of the converter to a sudden step change in the output load current. The output voltage deviation is characterized by two parameters: Maximum Output Voltage Deviation and Response Time (please refer to the data sheet for the detailed specification). The value of dynamic resistance for a defined step current is defined as: Vout R = dynamic 0.5*Imax Test 1)
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Test (Turn on the module by using the external switch) 1) Turn on the fan. 2) Turn on the input power supply and set it to the desired operating point. 3) Set channel 1 on the oscilloscope to be DC coupled and to the appropriate range for the input voltage. 4) Connect a coaxial cable from channel 1 to BNC1 on the Evaluation Board. 5) Set channel 2 on the oscilloscope to be DC coupled and to the appropriate range for the output voltage. 6) Connect a coaxial cable from channel 2 to BNC2
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7) Use the following formulas to calculate the efficiency: Efficiency= (Pout/Pin) × 100(%) Pin = Iin × Vin Pout = Iout × Vout For IPM12C series The following graph shows the efficiency results of the IPM12C0A0R04A converter measured at different operating points, the output voltage was set at 5V. 100 90 Vi=14V 80 Vi=12V Vi=10V Vi=8V 70 12 3 4 LOAD (A) For IPM04C series The following graph shows the efficiency results of the IPM04C0A0R06A converter measured at different oper
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Appendix A- Evaluation Board Schematic 14
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Appendix B - Evaluation Board Layout (Top View) 15
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Appendix C - Evaluation Board Layout (Bottom View) CONTACT: www.delta.com.tw/dcdc USA: Asia & the rest of world: Europe: Telephone: Telephone: +886 3 4526107 ext 6220 Phone: +41 31 998 53 11 East Coast: (888) 335 8201 Fax: +886 3 4513485 Fax: +41 31 998 53 53 West Coast: (888) 335 8208 Email: DCDC@delta.com.tw Email: DCDC@delta-es.com Fax: (978) 656 3964 Email: DCDC@delta-corp.com WARRANTY Delta offers a two (2) year limited warranty. Complete warranty
