IPS20 ETC2 [List of Unclassifed Manufacturers], IPS20 Datasheet
IPS20
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IPS20 Summary of contents
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... This allows the output voltage of the SMPS to be set to any value down to about 1.2V. The IPS20 and IPS21 are suitable for any SMPS and any make of SMPS controllers, including flyback, forward, PFC and DC/DC solutions. ...
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... Current sensing pin. This pin is the inverting input of the current sense amplifier. The positive input of the amplifier is connected to an internal trimmed reference. The sensing threshold is 50mV PTAT (IPS20) or 100mV constant (IPS21). This pin should be connected through a resistor to the external current sensing resistor. ...
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... Power Management IPS20 and IPS21 TYPICAL FEEDBACK CIRCUITRY WITH CONTROL OF PRIMARY FLYBACK CONVERTER IN Rectified AC IN+ FLYBACK CONVERTER 1) Current limiting: The current limiting is adjustable through RISENSE 2) Regulated Voltage: The regulated voltage is adjustable through RV1 and RV2 3) Compensation The voltage-control trans-conductance operational amplifier can be fully compensated. Both of its compensation pins are directly accessible for external compensation components ...
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... If the IPS20 or IPS21 Vcc is connected to the converter output voltage, then under start-up or short-circuit conditions, the IPS20/21 isn’t supplied with a high enough voltage. This is due to the fact that the chip has its power supply line in common with the power supply line of the system. Therefore, the current limitation can only be ensured by the primary PWM module, that should be chosen accordingly ...
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... Power Management IPS20 and IPS21 AUXILLIARY POWER SUPPLY This simple circuitry allows to supply the chip with a separate power line. In case of short-circuit, when Vout+ < Vcc, the chip still keeps working properly and limits the output current to its maximum targeted value. TR1 D1 SCHOTTKY DERIVATIVE OF AAI’ ...
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... Power Management IPS20 and IPS21 ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATING Characteristics IPS 20 and IPS21 Max I (4V shunt regulator) CC Opto sourcing current with external resistor Operating junction temperature Storage temperature range Lead temperature (3 mm from case for 5 sec.) PARAMETER Supply, Bias Shunt regulator voltage ...
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... Max OPTO output sourcing current with ext. resistor Note1: Tighter tolerances to 0.5% available upon request. Note2: All values are @ 25°C unless otherwise specified. Note3: Electrical parameters, although guaranteed, are not all 100% tested in production. Figure 1: IPS20 and IPS21 4V Shunt Regulator Icc 300 250 200 150 ...
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... Power Management IPS20 and IPS21 Figure 3: IPS20 Ref. with copper temperature drift compensation -40 -20 -50 -30 Figure 5: Transfer function of the voltage regulation 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 1.185 © Copyright 2006-2009 - ASIC Advantage, Inc Temperature (°C) Figure 4: IPS21 100mV Reference 100 99 ...
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... Power Management IPS20 and IPS21 Figure 6a: Transfer Function of the IPS20 Current Regulation 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -0.2 47.5 Figure 6b: Transfer function of the IPS21 current regulation 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 98.5 Fig 7: Open loop gain of VSENSE amplifier without compensation 140 120 100 -20 0.001 0.01 © Copyright 2006-2009 - ASIC Advantage, Inc. ...
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... VCC pin. This external supply should be set for around 5 volts and 10 milliamps possible to damage an IPS20/21 if one of these lab supplies is set for (say) 12 volts and 10 milliamps, the lab supply is powered-on, and then the lab supply is connected to the IPS20/21, because the VCC voltage will be 12 volts (in this example) until the IPS20/21 starts conducting current and discharges any output capacitance in the lab supply ...
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... Controllers, and Application Notes. PACKAGE DIMENSIONS AND MARKING The IPS20 and IPS21 are available in plastic 8-pin DIP and plastic 8-pin SOIC packages. Refer to the latest version of specification AAPS001 (ASIC Advantage’s “Package Numbering, Marking, and Outline Standard”, available at www.asicadvantage.com) for specific information concerning the package dimensions and package marking. ...
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... Power Management IPS20 and IPS21 The following is a brief overview of certain terms and conditions of sale of product. For a full and complete copy of all the General Terms and Conditions of Sale, visit our webpage http://www.asicadvantage.com/terms.htm. LIMITED WARRANTY The product is warranted that it will conform to the applicable specifications and be free of defects for one year. ...