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D051212T-2W Datasheet(PDF) 2 Page - MORNSUN Science& Technology Ltd. |
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D051212T-2W Datasheet(HTML) 2 Page - MORNSUN Science& Technology Ltd. |
2 / 2 page MORNSUN reserves the copyright Specifications subject to change without notice. D_T-2W A/0-2008 Page 2 of 2 COMMON SPECIFICATIONS APPLICATION NOTE Item Test Conditions Min Typ Max Units Storage humidity 95 % Operating temperature -40 85 Storage temperature -55 125 Temp. rise at full load 15 25 Lead temperature 1.5mm from case for 10 seconds 260 °C Short circuit protection* 1 S Cooling Free air convection package material Plastic (UL94-V0) MTBF 3500 K hours Weight 2.1 g *Supply voltage must be discontinued at the end of short circuit duration. TYPICAL CHARECTERISTICS Ambient Temperature C ( ) RECOMMENDED REFLOW SOLDERING PROFILE 0 50 100 150 200 250 Ti me ( s ec .) 22 0C o 1 0 M ax S ec 26 0C o 90 Max ( >220 C) o Sec OUTLINE DIMENSIONS& RECOMMENDED FOOTPRINT 12 3 5 67 8 9 10 12 13 14 1.27 0.25 2.75 17.78 (0.700) FOOTPRINT DETAILS 1 2 6 5 Vin GND Vo1 0V1 9 Vo2 Function NC:No connection 1 2 3 6 5 13 12 8 0.50 5. 00 。 15.24 (0.600) (0.02 0) 9 10 10 NC 1.0 (0.05 0) (0.01 0) (0.10 8) 7 14 0V2 Others RECOMMENDED FOOTPRINT Top view,grid :2.54mm(0 .1inch) Note: Unit:mm(inch) Pin sect io n:0.60*0. 25mm(0.024 *0. 010inch) Pin sect io n tolera nces: 0. 10mm( 0.004inch) General t olera nces: 0.1 5mm( 0.006 in ch) First Angle Projection 0.25 1.30 0.13 (0.051) 0.005 2.0 (0.039) A A Requirement On Output Load To ensure this module can operate efficiently and reliably, a minimum load is specified for this kind of DC/DC converter in addition to a maximum load (namely full load). During operation, make sure the specified range of input voltage is not exceeded, the minimum output load is not less than 10% of the full load, and that this product should never be operated under no load! If the actual output power is very small, please connect a resistor with proper resistance at the output end in parallel to increase the load, or use our company ’s products with a lower rated output power (D_T –1W). Recommended testing circuit If you want to further decrease the input/output ripple, an “LC” filtering network may be connected to the input and output ends of the DC/DC converter, see (Figure1). (Figure 1) Vin GND +Vo1 0V1 DC C L DC C +Vo2 0V2 L C L It should also be noted that the inductance and the frequency of the “LC” filtering network should be staggered with the DC/DC frequency to avoid mutual interference. 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 greatest capacitance of its filter capacitor sees (Table 1). EXTERNAL CAPACITOR TABLE (TABLE 1) Vin (VDC) Cin (uF) Vout (VDC) Cout (uF) 5 4.7 5 4.7 12 2.2 9 2.2 - - 12 1 - - 15 0.74 It ’s not recommended to connect any external capacitor in the application field with less than 0.5 watt output. Output Voltage Regulation and Over-voltage Protection Circuit The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is connected to the input or output end in series (Figure2). Vin GND REG Vin GND REG Vo1 0V1 Vo1 0V1 DC DC DC DC Vo2 0V2 REG Vo2 0V2 (Figure2) Overload Protection Under normal operating conditions, the output circuit of these products has no protection against overload. The simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit. No parallel connection or plug and play. |
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