SHENZHEN SUNYUAN TECHNOLOGY CO., LTD. 15:29 VBXXXXS/D-1W DC-DC CONVERTER HIGH POWER DENSITY S:7Pin SIP PACKAGE D:14Pin DIP PACKAGE SINGLE OUTPUT VOLTAGE INDUSTRIAL STANDARD PIN-OUT NO HEAT SINK REQUIRED 1KVAC ISOLATION REULATED OUTPUT VOLTAGE PCB MOUNTING ELECTRICAL SPECIFICATIONS: (All specifications tested typically @ 25°C, humidity<75%, nominal input and rated output unless otherwise noted.) OUTPUT SPECIFICATIONS Items: Testing condition Output accuracy: Min Typ Max At full load and nominal Vin ±2% Output power: 1W Line regulation: Input voltage from low to full load Load regulation: From 0% to full load Ripple and noise: 20MHz bandwidth +/-0.5%max,(3.3 VDC output +/- 1 % max ) +/- 1 % 0.5% 30mVp-p Temperature drift: ±0.02 %/°C Switching frequency 100K HZ Continue protection>30s Short circuit protection INPUT SPECIFICATIONS Items: Voltage range Testing condition Min Typ Max +/- 20% Filter Pi COMMON SPECIFICATIONS Items Min Typ. Max Operating temperature range -40°C +65°C Storage temperature range -55°C +125°C Humidity <90% Cooling Free Air Convection Leak current Isolation voltage (VDC) 1mA Input to Output 1,000 109 Isolation resistance (ohms) Isolation capacitance (pF) Efficiency (%) 60 See Product List Case material Copyright @ Shenzhen Sunyuan Technology Co., Ltd. 55 75 Non-conductive black plastic Edition-SZSY-07-01 Printed in P.R.C January 2007 Page 1 of 4 SHENZHEN SUNYUAN TECHNOLOGY CO., LTD. 15:29 VBXXXXS/D-1W DC-DC CONVERTER Potting material Epoxy Resin UL94-V0 Packing material Tube SIP: 19.6*6.0*10(0.77*0.24*0.40) Dimension (mm / inch) DIP: 20.4*10*8.2(0.8*0.4*0.32) Weight (g) 10 MTBF (Hrs) >1,000,000 PRODUCT LIST Input Voltage (VDC) Output Efficiency Part Number Range Nominal Max. VB0503S-1W 4.5-5.5 5 7.25 VB0505S-1W 4.5-5.5 5 7.25 VB0512S-1W 4.5-5.5 5 VB1205S-1W 10.8-13.2 VB1212S-1W Max Current (mA) 200 Voltage (VDC) (%, Typ.) Package 3.3 68 SIP 200 5 67 SIP 7.25 84 12 72 SIP 12 16.0 200 5 64 SIP 10.8-13.2 12 16.0 84 12 68 SIP VB1209S-1W 10.8-13.2 24 16.0 111 15 68 SIP VB2405S-1W 21.6-26.4 24 30.0 200 5 68 SIP VB2409S-1W 21.6-26.4 24 30.0 111 9 66 SIP VB2412S-1W 21.6-26.4 24 30.0 84 12 77 SIP VB0512D-1W 4.5-7.25 5 7.25 84 12 72 DIP VB1205D-1W 10.8-13.2 12 16.0 200 5 69 DIP VB2405D-1W 21.6-26.4 24 30.0 200 5 68 DIP VB2409D-1W 21.6-26.4 24 16.0 111 9 68 DIP Connecting DC-DC Converters in Series Galvanic isolation of the output allows multiple converters to be connected in series simply by connecting the positive output of one converter to the negative of another (see figure 1). In this way, non-standard voltage rails can be generated, however, the current output of the highest output voltage converter should not be exceeded. When converters are connected in series, additional filtering is strongly recommended as the converters switching circuits are not synchronized. As well as a summation of the ripple voltages, the output could also produce relatively large beat frequencies. A capacitor across the output will help, as will a series inductor. Connecting DC-DC Converters in Parallel If the available power output from a single converter is inadequate for the application, then multiple converters can be paralleled to produce a higher output power. However, it is not recommended to parallel converters to generate a higher power output, please select our higher power output modules or contact us for a customized solution. It should be noted that it is always preferable to parallel multiple converters of the same type. For instance, if a 2.5W converter is required, then either 2pcs AxxxxS-2W should be used or 3 AxxxxS-1W, not an AxxxxS-2W and an AxxxxS-1W. The reason for this is that the output voltages are not sufficiently well matched to guarantee that an AxxxxS-2W would supply twice as much as an AxxxxS-1W and the situation would occur where there was only 1W being drawn from the AxxxxS-2W and 1.5W from AxxxxS-1W. Even with paralleled converters of the same type, loading will be uneven, however, there is only likely to be around a 10% difference in output load when the output voltages are well matched. When connecting converter outputs, it should be remembered that the switching will not be synchronous, hence some form of coupling should be employed. One possible solution is to use a diode feed, this is suitable mainly for 12V and 15V output types only where the diode voltage drop (typically 0.6V) will not significantly affect the circuit functionality (see figure 2). With 5V and 9V supplies the diode drop is generally too large to consider as a suitable means of connecting paralleled converters. This method also Copyright @ Shenzhen Sunyuan Technology Co., Ltd. Edition-SZSY-07-01 Printed in P.R.C January 2007 Page 2 of 4 SHENZHEN SUNYUAN TECHNOLOGY CO., LTD. 15:29 VBXXXXS/D-1W DC-DC CONVERTER has a beat frequency that will superimpose itself over the ripple of the two converters, this can be reduced by using an external capacitor at the paralleled output. The preferred method of connecting converters in parallel is via series inductors on the output (see figure 3). This configuration not only has a lower loss of voltage than the diode method, but by suitable choice of inductor and an additional external capacitor, the beat frequency can be significantly reduced, as will the ripple from each converter. Suitable values are given in the table below (see table 1), these typically reduce the beat and ripple frequencies by a factor of 10. Isolation One of the main features of the majority of Sunyuan components DC-DC converters is the high galvanic isolation capability. This allows several variations on circuit topography by using a single DC-DC converter. The basic input to output isolation can be used to provide either a simple isolated output power source, or to generate different voltage rails and /or dual polarity rails. These configurations are most often found in data processing, instrumentation and other noise sensitive circuits where it is necessary to isolate the load and noise presented to the local power supply rails from that of an entire system. Usually local supply noise appears as common mode noise at the converter and does not pollute the main system power supply rails. The isolated positive output can be connected to the input ground rail to generate a negative supply rail if required. Since the output is isolated from the input the choice of reference for the output side can be relatively arbitrary, for example an additional single rail can be generated above the main supply rail or offset by some other DC value. Regulated converters need more consideration than the unregulated type for mixing the reference level. Essentially the single supply rail has a regulator in its positive output rail only, hence referring the isolated ground will only work if all the current return is through the DC-DC and not via other external components, such as diode bias, resistor feed. Have an alternative return path can upset the regulation and the performance of the system may not equal that of the converter. In one word, the isolation features are to generate two completely independent power supply but also united perfectly through the modern technology. This has been widely used in the application of mixed circuits, A/D, D/A and other circuits that are sensitive to noise. Filtering All Sunyuan isolated DC-DC Converters have a fixed characteristic frequency at which the device operates. This fixed frequency allows filtering that is relatively simple compared to pulse-skipping types. In a pulse-skipping converter a large range of frequencies are encountered as the device adjusts the pulse interval for loading conditions. NOMENCLATURE TEMPERATURE DERATING GRAPH Output Power（%） 120 100 80 60 Safe Operating Area 40 20 0 -40 0 40 71 85 120 Operating Temp (Celsius) TYPICAL CONNECTION +Vo +Vin Cin DC-DC CONVERTER GND Copyright @ Shenzhen Sunyuan Technology Co., Ltd. 0V Edition-SZSY-07-01 Printed in P.R.C January 2007 Page 3 of 4 15:29 SHENZHEN SUNYUAN TECHNOLOGY CO., LTD. VBXXXXS/D-1W DC-DC CONVERTER OUTLINE DIMENSION PINS DESCRIPTION SIP Connection DIP 1 +Vin +Vin 14 2 GND GND 1 4 0V 0V 11 6 +VO +Vo 9 3,5,7 omitted NC 7 omitted 2,3,4,5,6,8,10,12,13 Note:PIN”7” can’t connect any component. SHENZHEN SUNYUAN TECHNOLOGY CO., LTD. Meihua Rd. Futian District, Shenzhen 518049, China Tel: +86-755-83100080 Fax: +86-755-83116652 Email: [email protected] www.szsunyuan.com Copyright @ Shenzhen Sunyuan Technology Co., Ltd. Edition-SZSY-07-01 Printed in P.R.C January 2007 Page 4 of 4