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Summary of Contents for TAMURA EPM Series
- Page 1 Application Notes EPM Series EPM Series Energy-Saving Power Module Series...
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Page 2: Application Notes
Application Notes EPM Series Rev.3.1 Energy-Saving Power Module Series Ｍay, 2013 Outline The EPM Energy-Saving Power Module Series is a series of energy-saving switching power modules with built-in switching transformers, control ICs, control circuits and switching elements (FET). Attaching the input noise filter, the input rectifier diode and the output smoothing capacitor externally enables the easy creation of power switching with high-efficiency, low-standby power. - Page 3 EPM Series Application Notes Selecting Externally Connected Equipment The example of application circuits and parts value which are indicated to this application note aim at assistance of a design. Therefore, external parts variation or user operating conditions are not fully taken into consideration.
- Page 4 EPM Series Application Notes 1.2 parts example Output Specifications Part 3.3V 1.0A 5V 1.0A 12V 0.5A 12V 1.0A M101 EPM0310SJ EPM0510SJ EPM1205SJ EPM1210SJ F101 250V 1.6A time-lag 250V 1.6A time-lag 250V 1.6A time-lag 250V 1.6A time-lag TH101 5Ω～10Ω 5Ω～10Ω 5Ω～10Ω 5Ω～10Ω L101 22mH～47mH/ 0.2A 22mH～47mH/ 0.3A 22mH～47mH/ 0.3A 22mH～47mH/ 0.5A...
- Page 5 EPM Series Application Notes 1.3 AC input DC output When using an AC input connector and DC output connector, pay attention to the rated voltage and rated current of the connector. Consider the input voltage, withstand voltage and safety standard demanded values and provide a clearance between AC input connector pins.
- Page 6 EPM Series Application Notes 1.6 X capacitor discharge resistance (R101） The voltage immediately before cutoff is charged in the X capacitor even when the input line is in cutoff status. With a device at which parts of the same voltage as the X capacitor may be touched, a discharge resistor is necessary according to the capacity of the X capacitor.
- Page 7 EPM Series Application Notes 1.8 Surge current prevention（TH101) When input power is applied, an in-rush current which charges the input smoothing electrolytic capacitor flows. An in-rush current that is too large will cause the power supply voltage to become unstable and may affect the devices which share the power supply.
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Page 8: Input Voltage Range
EPM Series Application Notes 1.9 Input smoothing electrolytic capacitor（C102) The input smoothing electrolytic capacitor has a large effect on the characteristics and life of the product. Select the capacitor by paying attention to the following: ①Install the capacitor very close to the module (M101) and use a wide pattern to connect M101. - Page 9 EPM Series Application Notes ③Calculate the guaranteed life of the electrolytic capacitor and check that there is no problem. Since the life calculation expression is different depending on the capacitor manufacturer and type, requesting life calculation by the manufacturer of the capacitor used is recommended.
- Page 10 EPM Series Application Notes The ripple current of an electrolytic capacitor is a triangle wave high frequencycurrent with the input current (DC current) made the average value. Ripple current is calculated as follows: Discharging current (Idis) Charging current (Ich) Iripple Idis 1.10 Output smoothing electrolytic capacitor（C201)
- Page 11 EPM Series Application Notes ⑤ When the overvoltage protection operated, check that the rated voltage of the electrolytic capacitor was not exceeded. The following rated voltage is recommended: ・3.3V output ： Rated voltage 10Vor more ・5V output ： Rated voltage 10Vor more ・12V output...
- Page 12 EPM Series Application Notes 1.11 LCπ type filter（L201,C202) Output ripple voltage reduction is possible to a certain degree by using a low impedance electrolytic capacitor at C201. However, the addition of a one-stage LCπ type filter is effective in lowering the output ripple voltage more.
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Page 13: Protection Function
EPM Series Application Notes 2. Protection function 2.1 Overcurrent protection function An overcurrent protection function is provided as protection when an output short circuit or overload occurs. The operation mode is automatic reset operation. Overload detected 過負荷検出 Automatic reset operation 自動復帰動作... - Page 14 EPM Series Application Notes Startup time adjustment The startup time at which the output voltage rises to 90% of the specified output voltage after input power is first applied is set as follows: Input voltage (VDCin) Output voltage Startup time (ts) The startup time can be adjusted by connecting an external resistor and capacitoras follows: Connect capacitor C to Vcc (pin 11) and -DCIN (pin 10) of M101.
- Page 15 EPM Series Application Notes 4.2 Input and output capacitors Install the input smoothing capacitor (C102) and output capacitor (C201) close to M101. When there is a PFC output capacitor and a separate inverter smoothing capacitor, these capacitors can be shared. However, when the distance is long, the input smoothing capacitor only for M101 must be installed near M101.
- Page 16 EPM Series Application Notes Noise filter layout precautions When a noise filter (X capacitor, choke) is located near the module, the original noise reduction effect may not be produced and noise reduction may become difficult. Make the distance between noise filter and module long.
- Page 17 EPM Series Application Notes Output derating When the ambient temperature exceeds +60℃, reduce the output power in accordance with the output derating chart below. When the ambient temperature is affected by the heat generated by surrounding components, then the ambient...
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Page 18: User Precautions
Ensure that you are in possession of the most up-to-date information when using this product. ●The operation examples and circuit examples shown in this manual are for reference purposes only, and Tamura Corporation disclaims all responsibility for any violations of industrial property rights, intellectual property rights and any other rights owned by Tamura Corporation or third parties that these may entail. - Page 19 http://www.tamura‐ss.co.jp/electronics/en/...