DC/DC Converter K78Lxx-500R3 Series FEATURES Wide input voltage , non-isolated & regulated single 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 K78Lxx-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 K78L03-500R3 K78L05-500R3 UL/CE K78L12-500R3 K78L15-500R3 Input Voltage (VDC) Nominal (Range) 24 (4.75-36) 24 (6.5-36) 12 (7-31) 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 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 Min. Typ. Max. K78L03-500R3 -- ±2 ±4 Others -- ±2 ±3 Unit Output Voltage Accuracy Full load, input voltage range Line Regulation Full load, input voltage range -- ±0.2 ±0.4 Load Regulation Nominal input ,10% -100% load -- ±0.4 ±0.6 Ripple & Noise* 20MHz bandwidth, nominal input, 10% -100% load -- 20 75 mVp-p Temperature Drift Coefficient Operating temperature -40℃～ +85℃ -- -- ±0.03 %/℃ -- 50 250 mV 0.2 1 ms Transient response deviation Transient recovery time Output short circuit protection Nominal input, 25% load step change Nominal input -- % 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, 12V/15V output products will be 2%Vo. 2015.12.15-A/1 Page 1 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation DC/DC Converter K78Lxx-500R3 Series General Specifications Item Operating Conditions Min. Typ. Max. Operating Temperature Derating if the temperature ≥71℃ (see Fig. 1) -40 -- 85 -55 -- 125 260 Storage Temperature 单位 ℃ Pin Welding Resistance Temperature Welding time: 10s (Max.) -- -- Storage Humidity Non-condensing 5 -- 95 -- 850 KHz -- -- K hours Switching Frequency Full load, nominal input 550 MTBF MIL-HDBK-217F@25℃ 2000 %RH Physical Specifications Package Dimensions 10.00*7.20*11.00 mm Weight 1.0g (Typ.) Cooling Method Free air convection EMC Specifications EMI EMS Conducted Disturbance CISPR22/EN55022 CLASS B (see Fig. 5-② for recommended circuit) Radiated Emission CISPR22/EN55022 CLASS B (see Fig. 5-② for recommended circuit) Electrostatic Discharge IEC/EN 61000-4-2 Contact ±4KV perf. Criteria B Radiation Immunity 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 Conducted Disturbance Immunity IEC/EN 61000-4-6 3Vr.m.s perf. Criteria A Output Power Percentage(%) Product Characteristic Curve 120 Temperature Derating Curve 100 80 60 40 The Wind Speed:0.8 m/ s 20 0 -40 0 40 71 85 120 Operatin g Temper atu re ( ℃) Fig. 1 2015.12.15-A/1 Page 2 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation DC/DC Converter K78Lxx-500R3 Series Design Reference 1. Typical application circuit 1 +Vin C1 GND 3 DC/D C 1 +Vin +Vout C1 2 C2 3 1 DC/DC GN D 2 C3 GND Sheet 1 +Vout 3 C4 C2 Negative output application circuit Fig. 2 Typical application circuit +Vin -Vout GN D GND Positive output application circuit 2 DC / DC C1/C3 (ceramic capacitor) Part No. GND C2/C4 (ceramic capacitor) 22μF/10V K78L03-500R3 LDM 1 DC/DC K78L05-500R3 -Vout 2 22μF/25V 22μF/25V K78L15-500R3 3 C1 22μF/10V 10μF/50V K78L12-500R3 C2 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 1 负 载 22μ F DC/DC 2 3 C1 L Vout C2 22μ F 负 载 GND GND Positive output Negative 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 2015.12.15-A/1 Page 3 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation DC/DC Converter K78Lxx-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. Packing bag number: 58010116; 2. The max. capacitive load should be tested within the input voltage range and under full load conditions; 3. Without any special statement,all indexes are only specific to positive output application; 4. Unless otherwise specified, data in this datasheet should be tested under the conditions of Ta=25℃, humidity<75% when inputting nominal voltage and outputting rated load; 5. All index testing methods in this datasheet are based on our Company’s corporate standards; 6. 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; 7. 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] 2015.12.15-A/1 Page 4 of 4 MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation