® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density FEATURES ►Smallest Encapsulated 40W Converter ►Ultra-compact 2" X 1" Package ►Wide 2:1 Input Voltage Range ►Fully Regulated Output Voltage ►Excellent Efficiency up to 92% ►I/O Isolation 1500 VDC ►Operating Temp. Range -40℃ to +80℃ ►No Min. Load Requirement ►Overload/Voltage/Temp. and Short Circuit Protection ►Remote On/Off Control, Output Voltage Trim ►Shielded Metal Case with Insulated Baseplate ►UL/cUL/IEC/EN 60950-1 Safety Approval PRODUCT OVERVIEW The MINMAX MKW40 series is a new generation of high performance dc-dc converter modules setting a new standard concerning power density. The product offers fully 40W in an encapsulated, shielded metal package with dimensions of just 2.0"x1.0"x0.4". All models provide wide 2:1 input voltage range and precisely regulated output voltages. Advanced circuit topology provides a very high efficiency up to 92% which allows an operating temperature range of -40°C to +80°C. Further features include remote On/Off, trimmable output voltage, under-voltage shutdown as well as overload and over-temperature protection. Typical applications for these converters are battery operated equipment, instrumentation,distributed power architectures in communication and industrial electronics and many other space critical applications. Model Selection Guide Model Number MKW40-12S033 MKW40-12S05 MKW40-12S12 MKW40-12S15 MKW40-12S24 MKW40-12D12 MKW40-12D15 MKW40-24S033 MKW40-24S05 MKW40-24S12 MKW40-24S15 MKW40-24S24 MKW40-24D12 MKW40-24D15 MKW40-48S033 MKW40-48S05 MKW40-48S12 MKW40-48S15 MKW40-48S24 MKW40-48D12 MKW40-48D15 Input Voltage (Range) Output Voltage VDC VDC 3.3 5 12 15 24 ±12 ±15 3.3 5 12 15 24 ±12 ±15 3.3 5 12 15 24 ±12 ±15 12 (9 ~ 18) 24 (18 ~ 36) 48 (36 ~ 75) Output Current Input Current Max. Min. @Max. Load @No Load mA 8000 8000 3330 2670 1670 ±1670 ±1330 8000 8000 3330 2670 1670 ±1670 ±1330 8000 8000 3330 2670 1670 ±1670 ±1330 mA 0 0 0 0 0 ±145 ±110 0 0 0 0 0 ±145 ±110 0 0 0 0 0 ±145 ±110 mA(typ.) 2470 3750 3750 3700 3670 3790 3790 1220 1830 1830 1830 1835 1870 1870 610 920 910 910 918 940 940 mA(typ.) 120 160 160 150 160 70 60 75 80 85 75 85 50 45 40 50 50 50 50 65 65 Reflected Ripple Current Over Voltage Protection Max. capacitive Load mA (typ.) VDC 3.9 6.2 15 18 30 ±15 ±18 3.9 6.2 15 18 30 ±15 ±18 3.9 6.2 15 18 30 ±15 ±18 μF 21000 13600 2400 1500 600 1200# 750# 21000 13600 2400 1500 600 1200# 750# 21000 13600 2400 1500 600 1200# 750# 50 30 20 @Max. Load # For each output E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 1 of 10 Efficiency (typ.) % 89 89 89 90 91 88 88 90 91 91 91 91 89 89 90 91 92 92 91 89 89 ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density Input Specifications Parameter Model 12V Input Models 24V Input Models 48V Input Models 12V Input Models 24V Input Models 48V Input Models 12V Input Models 24V Input Models 48V Input Models Input Surge Voltage (1 sec. max.) Start-Up Threshold Voltage Under Voltage Shutdown Input Polarity Protection Power Up Start Up Time Remote On/Off Input Filter Short Circuit Current Min. -0.7 -0.7 -0.7 ------------- Typ. ------------8.3 16.5 33 Max. 25 50 100 9 18 36 ------- Unit VDC None --30 --30 All Models Internal LC Type --- (Hiccup Mode 1.5 Hz typ, 24V Output Model:0.3 Hz typ.) Nominal Vin and Constant Resistive Load ----- ms ms Output Specifications Parameter Output Voltage Setting Accuracy Output Voltage Balance Line Regulation Load Regulation Load Cross Regulation (Dual Output) Minimum Load Ripple & Noise Transient Recovery Time Transient Response Deviation Temperature Coefficient Over Current Protection Short Circuit Protection Over Voltage Protection Conditions Min. --------- Typ. --------- Max. ±1.0 Dual Output, Balanced Loads ±2.0 Vin=Min. to Max. @Full Load ±0.5 Single Output ±0.5 Min. Load to Full Load Dual Output ----±1.0 Asymmetrical Load 25%/100% Full Load ----±5.0 No Minimum Load Requirement for Single Output Models, for dual Output Models see Table 3.3V & 5V Output Models --100 --0-20 MHz Bandwidth 12V, 15V & 24V Models --150 --Dual Output Models --150 ----250 --25% Load Step Change --±3 ±5 ----±0.02 Current Limitation at 150% typ. of Iout max., Hiccup Hiccup Automatic Recovery For Shutdown Voltage see Model Selection Guide Unit %Vnom. % % % % % mV P-P mV P-P mV P-P μsec % %/℃ General Specifications Parameter I/O Isolation Voltage I/O Isolation Resistance I/O Isolation Capacitance Conditions Min. Typ. Max. 60 Seconds 1500 ----500 VDC 1000 ----100KHz, 1V ----1500 24Vo Models --285 --Other Models --320 --MIL-HDBK-217F@25℃, Ground Benign 328,000 UL/cUL 60950-1 recognition (CSA certificate), IEC/EN 60950-1(CB-report) Switching Frequency MTBF(calculated) Safety Approvals Unit VDC MΩ pF KHz KHz Hours Remote On/Off Control Parameter Converter On Converter Off Control Input Current (on) Control Input Current (off) Control Common Standby Input Current Conditions Vctrl = 5.0V Vctrl = 0V Nominal Vin E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 2 of 10 Min. 3.5V ~ 12V or Open Circuit 0V ~ 1.2V or Short Circuit ----Referenced to Negative Input --- Typ. Max. Unit 0.5 -0.5 ----- mA mA 2.5 --- mA ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density Output Voltage Trim Parameter Conditions % of nominal output voltage (24Vo Models) % of nominal output voltage (Other Models) Trim Up / Down Range(9) Min. +20 / -10 ±10 Typ. ----- Max. ----- Unit % Environmental Specifications Parameter Model Operating Temperature Range Natural Convection (10) Nominal Vin, Load 100% Inom. (for Power Derating see relative Derating Curves) Thermal Impedance Case Temperature Thermal Protection Storage Temperature Range Humidity (non condensing) Cooling RFI Lead Temperature (1.5mm from case for 10Sec.) Min. MKW40-XXS033 MKW40-XXS05 MKW40-XXS12 MKW40-XXS15 MKW40-XXS24 MKW40-XXDXX Natural Convection without Heatsink Natural Convection with Heatsink 100LFM Convection without Heatsink 100LFM Convection with Heatsink 200LFM Convection without Heatsink 200LFM Convection with Heatsink 400LFM Convection without Heatsink 400LFM Convection with Heatsink Max. without Heatsink with Heatsink 66 73 -40 46 Shutdown Temperature -50 --Free-Air convection Six-Sided Shielded, Metal Case --- ℃ 57 40 12.0 10.0 9.0 5.4 8.0 4.5 6.0 3.0 --- Unit 52 ℃/W ℃/W ℃/W ℃/W ℃/W ℃/W ℃/W ℃/W ℃ ----------------+105 110℃ typ. +125 95 ℃ % rel. H ℃ 260 EMC Specifications Parameter Standards & Level Conduction EN55024 ESD Radiated immunity Fast transient (8) Surge (8) Conducted immunity EMI EMS E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 3 of 10 Performance EN55022, FCC part 15 Class A (See Page 9) EN61000-4-2 air ± 8kV , Contact ± 6kV EN61000-4-3 10V/m EN61000-4-4 ±2kV EN61000-4-5 ±1kV EN61000-4-6 10Vrms B A A B A ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density Power Derating Curve 100 100 Natural Convection 20LFM 100LFM 60 Natural Convection 20LFM 80 Output Power (%) Output Power (%) 80 200LFM 400LFM 40 100LFM 60 200LFM 400LFM 40 20 20 0 0 ~ -40 0 20 40 60 100 110 80 ~ -40 0 20 Ambient Temperature C MKW40-XXS033 Derating Curve without Heatsink 100 110 80 100 Natural Convection 20LFM 100LFM 60 Natural Convection 20LFM 80 Output Power (%) 80 Output Power (%) 60 MKW40-XXS033 Derating Curve with Heatsink 100 200LFM 400LFM 40 100LFM 60 200LFM 400LFM 40 20 20 0 0 ~ -40 0 20 40 60 80 ~ -40 100 110 0 20 40 60 80 100 110 Ambient Temperature ] Ambient Temperature C MKW40-XXS05, MKW40-XXS12, MKW40-XXS15,MKW40-XXS24 Derating Curve without Heatsink MKW40-XXS05, MKW40-XXS12, MKW40-XXS15, MKW40-XXS24 Derating Curve with Heatsink 100 100 Natural Convection 20LFM 100LFM 60 Natural Convection 20LFM 80 Output Power (%) 80 Output Power (%) 40 Ambient Temperature C 200LFM 400LFM 40 100LFM 60 200LFM 400LFM 40 20 20 0 0 ~ -40 0 20 40 60 80 100 110 Ambient Temperature C MKW40-XXDXX Derating Curve without Heatsink E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 4 of 10 ~ -40 0 20 40 60 80 100 110 Ambient Temperature ] MKW40-XXDXX Derating Curve with Heatsink ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density 100 100 90 90 80 80 70 70 Efficiency(%) Efficiency(%) Efficiency Curve @25℃ 60 50 40 30 9V 20 10 20 30 40 50 60 70 80 90 40 30 9V 12V 10 18V 0 50 20 12V 10 60 18V 0 100 10 20 30 % of Full Load 90 80 80 70 70 Efficiency(%) Efficiency(%) 100 90 60 50 40 30 9V 20 10 50 60 80 90 100 70 80 90 60 50 40 30 9V 12V 10 18V 0 40 70 20 12V 30 60 MKW40-12S05 Efficiency vs Load Current 100 20 50 % of Full Load MKW40-12S033 Efficiency vs Load Current 10 40 18V 0 100 10 20 30 % of Full Load 40 50 60 70 80 90 100 % of Full Load MKW40-12S12 Efficiency vs Load Current MKW40-12S15 Efficiency vs Load Current 100 100 90 90 80 70 60 50 40 30 9V 20 10 0 10 20 30 40 50 60 70 80 90 Efficiency(%) Efficiency(%) 80 70 60 50 40 30 12V 20 18V 10 9V 12V 18V 0 100 10 % of Full Load 20 30 40 50 60 70 80 90 100 % of Full Load MKW40-12D12 Efficiency vs Load Current 100 100 90 90 80 80 70 70 Efficiency(%) Efficiency(%) MKW40-12S24 Efficiency vs Load Current 60 50 40 30 9V 20 12V 10 18V 0 10 20 30 40 50 60 70 80 90 100 % of Full Load MKW40-12D15 Efficiency vs Load Current E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 5 of 10 60 50 40 30 18V 20 24V 10 36V 0 10 20 30 40 50 60 70 80 90 100 % of Full Load MKW40-24S033 Efficiency vs Load Current ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density 100 100 90 90 80 80 70 70 Efficiency(%) Efficiency(%) Efficiency Curve @25℃ 60 50 40 30 60 50 40 30 18V 20 10 10 20 30 40 50 60 70 80 90 24V 10 36V 0 18V 20 24V 36V 0 100 10 20 30 % of Full Load 90 80 80 70 70 Efficiency(%) Efficiency(%) 100 90 60 50 40 30 18V 20 10 50 60 70 80 90 40 30 18V 24V 36V 0 100 10 20 30 90 80 80 70 70 Efficiency(%) Efficiency(%) 100 60 50 40 30 18V 20 10 0 70 80 90 30 18V 24V 36V 0 100 10 20 30 80 70 70 Efficiency(%) Efficiency(%) 90 80 60 50 40 30 36V 20 48V 10 75V 0 60 70 80 90 100 % of Full Load MKW40-48S033 Efficiency vs Load Current E-mail:[email protected] 2015/01/23 REV:19 50 60 70 80 90 100 MKW40-24D15 Efficiency vs Load Current 100 50 40 % of Full Load 90 40 100 40 100 30 90 50 MKW40-24D12 Efficiency vs Load Current 20 80 60 % of Full Load 10 70 10 36V 60 60 20 24V 50 50 MKW40-24S24 Efficiency vs Load Current 90 40 40 % of Full Load 100 30 100 50 MKW40-24S15 Efficiency vs Load Current 20 90 60 % of Full Load 10 80 10 36V 0 40 70 20 24V 30 60 MKW40-24S12 Efficiency vs Load Current 100 20 50 % of Full Load MKW40-24S05 Efficiency vs Load Current 10 40 Tel:886-6-2923150 Page 6 of 10 60 50 40 30 36V 20 48V 10 75V 0 10 20 30 40 50 60 70 80 90 100 % of Full Load MKW40-48S05 Efficiency vs Load Current ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density 100 100 90 90 80 80 70 70 Efficiency(%) Efficiency(%) Efficiency Curve @25℃ 60 50 40 30 36V 20 10 20 30 40 50 60 70 80 90 40 30 36V 48V 10 75V 0 50 20 48V 10 60 75V 0 10 100 20 30 40 50 60 70 80 90 100 % of Full Load % of Full Load MKW40-48S12 Efficiency vs Load Current MKW40-48S15 Efficiency vs Load Current 100 100 90 90 80 Efficiency(%) Efficiency(%) 80 70 60 50 40 30 20 10 0 70 60 50 40 30 36V 20 48V 10 75V 0 36V 48V 75V 10 10 20 30 40 50 60 70 80 90 100 20 30 40 50 60 70 80 90 100 % of Full Load % of Full Load MKW40-48S24 Efficiency vs Load Current MKW40-48D12 Efficiency vs Load Current 100 90 Efficiency(%) 80 70 60 50 40 30 36V 20 48V 10 75V 0 10 20 30 40 50 60 70 80 90 100 % of Full Load MKW40-48D15 Efficiency vs Load Current Notes 1 2 3 4 5 6 7 8 9 10 11 Specifications typical at Ta=+25℃, resistive load, nominal input voltage and rated output current unless otherwise noted. Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%. Ripple & Noise measurement with a 1μF M/C and a 10μF T/C. We recommend to protect the converter by a slow blow fuse in the input supply line. Other input and output voltage may be available, please contact factory. To order the converter with heatsink, please add a suffix –HS (e.g.MKW40-12S05-HS) to order code. To order the converter without Remote On/Off function, please add a suffix -N (e.g.MKW40-12S05-N) to order code. To meet EN61000-4-4 & EN61000-4-5 by adding a capacitor across the input pins.Suggested capacitor: CHEMI-CON KXG 330μF/100V. Do not exceed maximum power specification when adjusting output voltage. That “natural convection” is about 20LFM but is not equal to still air (0 LFM). Specifications are subject to change without notice. E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 7 of 10 ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density Package Specifications Mechanical Dimensions Pin Connections 5.08 5.08 10.16 [0.40] 1.00 [ 0.04] 1 3.6 [0.14] Bottom View 1.85 [0.07] 50.8 [2.00] 2 45.72 [1.80] 3 [0.20] [0.20] Pin Single Output Dual Output 1 +Vin +Vin 2 -Vin -Vin 3 Remote On/Off Remote On/Off 4 +Vout +Vout 5 -Vout Common 6 Trim -Vout T: 11.0mm(0.43 inch) for 24V Output Models T: 10.2mm(0.40 inch) for Other Output Models 5 6 4 ►All dimensions in mm 10.16 [0.40] 10.16 [0.40] 5.5 [0.22] 2.54 [0.10] T ►Tolerance: X.X±0.25 (X.XX±0.01) X.XX±0.13 ( X.XXX±0.005) ►Pin 25.4 [1.00] (inches) diameter 1.0 ±0.05 (0.04±0.002) Physical Characteristics Case Size (24V Output) : 50.8x25.4x11.0mm (2.0x1.0x0.43 inches) Case Size (Other Output) : 50.8x25.4x10.2mm (2.0x1.0x0.40 inches) Case Material : Aluminium Alloy, Black Anodized Coating Base Material : FR4 PCB (flammability to UL 94V-0 rated) Pin Material : Copper Alloy with Gold Plate Over Nickel Subplate Weight : 30g Heatsink (Option –HS) 31.1 [1.22] Physical Characteristics Heatsink Material : Aluminum Finish : Black Anodized Coating Weight : 9g T: 18.0mm(0.71 inch) for 24V Output Models T: 17.2mm(0.68 inch) for Other Output Models T ►The advantages of adding a 31.0 [1.22]Max Heat-sink Thermal pad heatsink are: 1. To improve heat dissipation and increase the stability and reliability of the DC/DC converters at high operating temperatures. Clamp Converter E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 8 of 10 2. To increase operating temperature of the DC/DC converter, please refer to Derating Curve. ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density EMI Filter meets Conducted EMI EN55022 class A; FCC part 15 level A Part No. C1 C2 C3 C4 MKW40-12SXX MKW40-24SXX MKW40-48SXX MKW40-12DXX MKW40-24DXX MKW40-48DXX 10μF/25V 1812 MLCC 4.7μF/50V 1812 MLCC 2.2μF/100V 1812 MLCC 10μF/25V 1812 MLCC 4.7μF/50V 1812 MLCC 2.2μF/100V 1812 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC None None None None None None 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC External Output Trimming Output can be externally trimmed by using the method shown below MKW40-XXS033 Trim Table Trim down 1 Vout= Vox0.99 Rd= 72.61 2 Vox0.98 32.55 3 Vox0.97 19.20 4 Vox0.96 12.52 5 Vox0.95 8.51 6 Vox0.94 5.84 7 Vox0.93 3.94 8 Vox0.92 2.51 9 Vox0.91 1.39 10 Vox0.90 0.50 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 60.84 MKW40-XXS05 Trim Table Trim down 1 Vout= Vox0.99 Rd= 138.88 2 Vox1.02 27.40 3 Vox1.03 16.25 4 Vox1.04 10.68 5 Vox1.05 7.34 6 Vox1.06 5.11 7 Vox1.07 3.51 8 Vox1.08 2.32 9 Vox1.09 1.39 10 Vox1.10 0.65 % Volts KOhms 2 Vox0.98 62.41 3 Vox0.97 36.92 4 Vox0.96 24.18 5 Vox0.95 16.53 6 Vox0.94 11.44 7 Vox0.93 7.79 8 Vox0.92 5.06 9 Vox0.91 2.94 10 Vox0.90 1.24 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 106.87 MKW40-XXS12 Trim Table Trim down 1 Vout= Vox0.99 Rd= 413.55 2 Vox1.02 47.76 3 Vox1.03 28.06 4 Vox1.04 18.21 5 Vox1.05 12.30 6 Vox1.06 8.36 7 Vox1.07 5.55 8 Vox1.08 3.44 9 Vox1.09 1.79 10 Vox1.10 0.48 % Volts KOhms 2 Vox0.98 184.55 3 Vox0.97 108.22 4 Vox0.96 70.05 5 Vox0.95 47.15 6 Vox0.94 31.88 7 Vox0.93 20.98 8 Vox0.92 12.80 9 Vox0.91 6.44 10 Vox0.90 1.35 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 351.00 MKW40-XXS15 Trim Table Trim down 1 Vout= Vox0.99 Rd= 530.73 2 Vox1.02 157.50 3 Vox1.03 93.00 4 Vox1.04 60.75 5 Vox1.05 41.40 6 Vox1.06 28.50 7 Vox1.07 19.29 8 Vox1.08 12.37 9 Vox1.09 7.00 10 Vox1.10 2.70 % Volts KOhms 2 Vox0.98 238.61 3 Vox0.97 141.24 4 Vox0.96 92.56 5 Vox0.95 63.35 6 Vox0.94 43.87 7 Vox0.93 29.96 8 Vox0.92 19.53 9 Vox0.91 11.41 10 Vox0.90 4.92 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 422.77 MKW40-XXS24 Trim Table Trim down 1 Vout= Vox0.99 Rd= 333.39 2 Vox1.02 189.89 3 Vox1.03 112.26 4 Vox1.04 73.44 5 Vox1.05 50.15 6 Vox1.06 34.63 7 Vox1.07 23.54 8 Vox1.08 15.22 9 Vox1.09 8.75 10 Vox1.10 3.58 % Volts KOhms 2 Vox0.98 148.80 3 Vox0.97 87.26 4 Vox0.96 56.50 5 Vox0.95 38.04 6 Vox0.94 25.73 7 Vox0.93 16.94 8 Vox0.92 10.35 9 Vox0.91 5.22 10 Vox0.90 1.12 % Volts KOhms 4 Vox1.04 108.50 6 Vox1.06 63.43 8 Vox1.08 40.90 10 Vox1.1 27.38 12 Vox1.12 18.37 14 Vox1.14 11.93 16 Vox1.16 7.10 18 Vox1.18 3.34 20 Vox1.2 0.34 % Volts KOhms Trim up Vout= Ru= 2 Vox1.02 243.70 E-mail:[email protected] 2015/01/23 REV:19 Tel:886-6-2923150 Page 9 of 10 ® MKW40 SERIES DC/DC CONVERTER 40W, Highest Power Density Test Setup Input Reflected-Ripple Current Test Setup Input reflected-ripple current is measured with a inductor Lin (4.7μH) and Cin (220μF, ESR < 1.0Ω at 100 KHz) to simulate source impedance. Capacitor Cin, offsets possible battery impedance. Current ripple is measured at the input terminals of the module, measurement bandwidth is 0-500 KHz. To Oscilloscope + + Battery +Vin Lin DC / DC Converter Current Probe Cin +Out -Vin Load -Out Peak-to-Peak Output Noise Measurement Test Use a 1μF ceramic capacitor and a 10μF tantalum capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 0-20 MHz. Position the load between 50 mm and 75 mm from the DC/DC Converter. +Vin +Out Copper Strip Single Output DC / DC Converter -Vin Cout -Out Scope +Vin +Out Copper Strip Dual Output DC / DC Converter Com. Copper Strip -Vin -Out Resistive Load Copper Strip Scope Cout Cout Resistive Load Scope Copper Strip Technical Notes Remote On/Off Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and off during a logic low. To turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the -Vin terminal. The switch can be an open collector or equivalent. A logic low is 0V to 1.2V. A logic high is 3.5V to 12V. The maximum sink current at the on/off terminal (Pin 3) during a logic low is -100μA. Overcurrent Protection To provide hiccup mode protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure overload for an unlimited duration. Overvoltage Protection The output overvoltage clamp consists of control circuitry, which is independent of the primary regulation loop, that monitors the voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage control that reduces the risk of output overvoltage. The OVP level can be found in the output data. Input Source Impedance The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the power module. In applications where power is supplied over long lines and output loading is high, it may be necessary to use a capacitor at the input to ensure startup. Capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low Equivalent Series Resistance (ESR < 1.0 Ω at 100 KHz) capacitor of a 33μF for the 12V input devices and a 10μF for the 24V and 48V devices. + DC Power Source +Vin + +Out DC / DC Converter Load Cin - -Vin -Out Output Ripple Reduction A good quality low ESR capacitor placed as close as practicable across the load will give the best ripple and noise performance. To reduce output ripple, it is recommended to use 4.7μF capacitors at the output. + +Vin - +Out Single Output DC / DC Converter DC Power Source -Vin + Cout +Vin DC Power Source Load -Out - +Out Dual Output DC / DC Com. Converter -Vin -Out Cout Load Load Cout Maximum Capacitive Load The MKW40 series has limitation of maximum connected capacitance at the output. The power module may be operated in current limiting mode during start-up, affecting the ramp-up and the startup time. The maximum capacitance can be found in the data sheet. Thermal Considerations Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module and board spacing. To avoid exceeding the maximum temperature rating of the components inside the power module, the case temperature must be kept below 105℃. The derating curves are determined from measurements obtained in a test setup. Position of air velocity probe and thermocouple 15mm / 0.6in 50mm / 2in Air Flow DUT 18, Sin Sin Road, An-Ping Industrial District, Tainan 702, Taiwan Tel: 886-6-2923150 Fax: 886-6-2923149 E-mail: [email protected] Minmax Technology Co., Ltd. 2015/01/23 REV:19 Page 10 of 10