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PWB4812LT-1W5 Datasheet(PDF) 2 Page - MORNSUN Science& Technology Ltd. |
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PWB4812LT-1W5 Datasheet(HTML) 2 Page - MORNSUN Science& Technology Ltd. |
2 / 3 page The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. PWA_LT-1W5 & PWB_LT-1W5 B/3-2010 Page 2 of 3 ISOLATION SPECIFICATIONS TYPICAL TEMPERATURE CURVE Item Test conditions Min. Typ. Max. Units Isolation voltage Tested for 1 minute and 1mA max 1500 VDC Isolation resistance Test at 500VDC 1000 M Ω Isolation capacitance Input/Output, 100KHz/1V 1000 pF OUTPUT SPECIFICATIONS Item Test conditions Min. Typ. Max. Units Output power Refer to products program 0.15 1.5 W Positive voltage accuracy Refer to recommended circuit ±1 ±3 Negative voltage accuracy Refer to recommended circuit ±3 ±5 Load regulation From 10% to 100% load ±0.5 ±1.5* Line regulation Input voltage from low to high ±0.2 ±0.75 % Temperature Drift (Vout) Refer to recommended circuit ±0.03 %/°C Output ripple & noise** 20MHz Bandwidth 35 100 mVp-p Switching Frequency 100% load, input voltage range 550 kHz *Dual output models unbalanced load: ±5%. **Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power Converter section, application notes. Operating Temp.( ) C Temperature Derating Graph Safe Operating Area 0 50 100 150 200 250 Ti me (s ec.) 60 Max (>220 C) Sec 22 0 C 1 0 M ax Se c Pe a k . Te mp 24 0 C Remark: The curve applies only to the hot air reflow soldering APPLICATION NOTE RECOMMENDED CIRCUIT 1) Requirement On Output Load In order to ensure the product operate efficiently and reliably, in addition to a max load (namely full load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified range of input voltage is not exceeded, the minimum output load no less than 10% load. If the actual load is less than the specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an appropriate resistor as extra loading, or contact our company for other lower output power products. 2) Recommended Circuit All the PWA_LT-1W5 & PWB_LT-1W5 series have been tested according to the following recommended testing circuit before leaving factory. This series should be tested under load (see Figure 1). If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the maximum capacitance of its filter capacitor sees (Table 1). General: Cin: 10 μF~47μF Cout: 10 μF/100mA 3) Input Current When it is used in unregulated power supply, be sure that the fluctuating range of the power supply and the rippled voltage do not exceed the m odule standard. Input current of power supply should afford the flash startup current of this kind of DC/DC module (Figure 2) General: Ip ≤1.6*Iin-max 4) No parallel connection or plug and play DC DC Vin GND +Vo 0V Cin Vin GND +Vo 0V Cin DC DC -Vo Single Output (Figure 1) Output External Capacitor Table (Table 1) Single Vout (VDC) Cout ( µF) Dual Vout (VDC) Cout ( µF) 3.3 2200 ±5 680 9 680 ±12 330 5 1000 ±15 220 12 470 - - 15 330 - |
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