DC/DC Converter K78xx-500R3 Series Wide input voltage, non-isolated & regulated single FEATURES output High efficiency up to 95% No-load input current as low as 0.2mA Operating temperature range: -40℃ to +85℃ Support the negative output Output short circuit protection Pin-out compatible with LM78XX linear regulators UL60950, EN60950 approval RoHS K78xx-500R3 series are high efficiency switching regulators and ideal substitutes of LM78xx series three-terminal linear regulators. The product is featured with high efficiency, low loss, short circuit protection, support the negative output and no heat sink requirement. They are widely used in industrial control, instrumentation, and electric power applications. Selection Guide Certification Part Number K7803-500R3 K7805-500R3 K7809-500R3 UL/CE K7812-500R3 K7815-500R3 Input Voltage (VDC) Nominal (Range) 24 (4.75-36) 24 (6.5-36) 12 (7-31) 24 (12-36) 24 (15-36) 12 (8-24) 24 (19-36) 12 (8-21) Output Output Voltage (VDC) Max. Output Current (mA) Efficiency (%/Typ.) (Min. Vin)/ (Max. Vin) @Full Load Max. Capacitive Load(µF) 3.3 500 86/80 680 5.0 500 90/84 680 -5.0 -300 80/81 330 9 500 93/90 680 12 500 94/91 680 -12 -150 84/85 330 15 500 95/93 680 -15 -150 85/87 330 Note:For input voltage higher than 30 VDC, a 22uF/50V input capacitor is required. Input Specifications Item Operating Conditions No-load Input Current Positive output Min. Typ. Max. Unit -- 0.2 1.5 mA Reverse Polarity Input Forbidden Input Filter Capacitor filter Output Specifications Item Operating Conditions Output Voltage Accuracy Full load, input voltage range Line Regulation Full load, input voltage range Load Regulation Nominal input voltage,10% -100% load Ripple & Noise* Temperature Coefficient Transient response deviation Transient recovery time Output short circuit protection Min. Typ. Max. K7803-500R3 -- ±2 ±4 Others -- ±2 ±3 -- ±0.2 ±0.4 -- ±0.4 ±0.6 -- 20 75 mVp-p -- -- ±0.03 %/℃ -- 50 250 mV -- 0.2 1 ms 20MHz bandwidth, nominal input voltage, 10% -100% load Operating temperature -40℃ to +85℃ Nominal input voltage, 25% load step change Nominal input voltage Unit % Continuous, self-recovery Note: *1. Ripple and noise tested with “parallel cable” method, please refer to DC-DC Converter Application Notes for specific operation methods; *2.With the load lower than 10%, the maximum ripple and noise of 3.3V/5V output products will be 150mVp-p, 9V/12V/15V output products will be 2%Vo. 2016.11.01-A/2 Page 1 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation DC/DC Converter K78xx-500R3 Series General Specifications Item Operating Temperature Operating Conditions Min. see Fig. 1 -40 -- +85 -55 -- +125 Storage Temperature Typ. Max. 单位 ℃ Pin Welding Resistance Temperature Welding time: 10s (Max.) -- -- +260 Storage Humidity Non-condensing 5 -- 95 Switching Frequency Full load, nominal input voltage 550 -- 850 KHz MTBF MIL-HDBK-217F@25℃ 2000 -- -- K hours %RH Physical Specifications Casing Material Black flame-retardant and heat-resistant plastic (UL94 V-0) Package Dimensions 11.60*7.55*10.16 mm Weight 1.8g (Typ.) Cooling Method Free air convection EMC Specifications EMI EMS CE CISPR22/EN55022 CLASS B (see Fig. 5-② for recommended circuit) RE CISPR22/EN55022 CLASS B (see Fig. 5-② for recommended circuit) ESD IEC/EN 61000-4-2 Contact ±4KV perf. Criteria B RS IEC/EN 61000-4-3 10V/m perf. Criteria A EFT IEC/EN 61000-4-4 ±1KV (see Fig. 5-① for recommended circuit) perf. Criteria B Surge IEC/EN 61000-4-5 line to line ±1KV (see Fig. 5-① for recommended circuit) perf. Criteria B CS IEC/EN 61000-4-6 3Vr.m.s perf. Criteria A Output Power Percentage(%) Product Characteristic Curve 120 Temperature Derating Curve 100 80 60 Safe Operating Area 40 20 0 -40 0 40 71 85 120 Operating Temperature (℃ ) Fig. 1 2016.11.01-A/2 Page 2 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation DC/DC Converter K78xx-500R3 Series Design Reference 1. Typical application circuit 1 +Vin C1 GND 3 DC/D C 2 1 +Vin +Vout C1 C2 -Vout 3 C2 GN D GND Positive output application circuit 2 DC / DC GN D Negative output application circuit Fig. 2 Typical application circuit +Vin 1 DC/DC 2 C3 GND +Vout 3 C4 Sheet 1 C1/C3 C2/C4 (ceramic capacitor) (ceramic capacitor) Part No. GND K7803-500R3 LDM 1 DC/DC -Vout 2 22μF/10V K7809-500R3 3 C1 22μF/10V K7805-500R3 C2 10μF/50V 22μF/16V K7812-500R3 22μF/25V K7815-500R3 22μF/25V Fig. 3 Positive and Negative output parallelling application circuit Note: 1. C1 and C2 (C3 and C4) are required and should be connected close to the pin terminal of the module. 2. The capacitance of C1 and C2 (C3 and C4) refer to Sheet 1, it can be increased properly if required, and tantalum or low ESR electrolytic capacitors may also suffice. 3. When the products used as the circuit like figure 3, an inductor named as LDM up to 10μH is recommended in the circuit to reduce the mutual interference. 4. Cannot be used in parallel for output and hot swap. To reduce the output ripple furtherly, it is suggested to connect a “LC” filter at the output terminal, and recommended value of L is 10µH-47µH. +Vin 1 C1 DC/DC L Vout 3 2 +Vin C2 负 载 22μ F 1 DC/DC 2 3 C1 L Vout C2 22μ F 负 载 GND GND Negative output Positive output Fig. 4 “LC” filter application circuit 2. EMC solution-recommended circuit FUSE L DM 1 L DM 2 V in Vin C0 +Vo GN D + M OV DC/DC C1 C5 C2 L OAD GN D ① ② Fig. 5 EMC recommended circuit 2016.11.01-A/2 Page 3 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation DC/DC Converter K78xx-500R3 Series FUSE Selected based on the actual input current from the customer MOV LDM1 C0 C1/C2 C5 LDM2 S20K30 82µH 680µF /50V Refer to Sheet 1 4.7µF /50V 12µH Note: Part ① in the Fig. 5 is for EMS test, part ② is for EMI filtering; parts ① and ② can be added based on actual requirement. 3. For more information please find the application notes on www.mornsun-power.com Dimensions and Recommended Layout Notes: 1. Packing information please refer to Product Packing Information which can be downloaded from www.mornsun-power.com. Packing bag number:58200003; 2. The max. capacitive load should be tested within the input voltage range and under full load conditions; 3. Unless otherwise specified, data in this datasheet should be tested under the conditions of Ta=25℃, humidity<75%RH when inputting nominal voltage and outputting rated load; 4. All index testing methods in this datasheet are based on our Company’s corporate standards; 5. The performance indexes of the product models listed in this manual are as above, but some indexes of non-standard model products will exceed the above-mentioned requirements, and please directly contact with our technician for specific information; 6. Specifications of this product are subject to changes without prior notice. MORNSUN Guangzhou Science & Technology Co., Ltd. Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou, P. R. China Tel: 86-20-38601850-8801 Fax: 86-20-38601272 E-mail: [email protected] 2016.11.01-A/2 Page 4 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation