® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density FEATURES ►Highest Power Density ►1" x 1" x 0.4" Shielded Metal Package ►Wide 2:1 Input Range ►Excellent Efficiency up to 90% ►Operating Temp. Range -40°C to +80°C ►Optional Heatsink ►I/O-isolation Voltage 1500VDC ►Remote On/Off Control ►Over Load Protection ►CSA/UL/IEC/EN 60950-1 (Approval pending) ►3 Year Product Warranty PRODUCT OVERVIEW The MINMAX MJW25 series is the latest range of a new generation of high performance dc-dc converter modules with very high power density. The product offers fully 25W in a shielded metal package with dimensions of just 1.0”x1.0”x0.4”. All models provide wide 2:1 input range and tightly regulated output voltage.By state-of-the-art circuit topology a very high efficiency up to 90% could be achieved allowing an operating temperature range of -40°C to +80°C (with derating). These converters are qualified for demanding applications in battery operated equipment,instrumentation,data communication,industrial and many other space critical applications. Model Selection Guide Model Input Output Number Voltage Voltage (Range) VDC Output Current Input Current Reflected Over Max. capacitive Efficiency Ripple Voltage Load (typ.) Current Protection mA (typ.) VDC μF % Max. @Max. Load @No Load VDC mA mA(typ.) mA(typ.) 3.3 6000 1900 75 3.9 10300 87 MJW25-12S033 MJW25-12S05 @Max. Load 5 5000 2340 85 6.2 6800 89 MJW25-12S12 12 12 2090 2350 80 15 1200 89 MJW25-12S15 (9 ~ 18) 15 1670 2350 80 18 750 89 MJW25-12D12 ±12 ±1040 2340 75 ±15 680# 89 MJW25-12D15 ±15 ±840 2360 75 ±18 380# 89 MJW25-24S033 3.3 6000 940 55 3.9 10300 88 MJW25-24S05 MJW25-24S12 24 MJW25-24S15 (18 ~ 36) 80 5 5000 1160 60 6.2 6800 90 12 2090 1160 55 15 1200 90 50 15 1670 1160 55 18 750 90 MJW25-24D12 ±12 ±1040 1170 50 ±15 680# 89 MJWI25-24D15 ±15 ±840 1180 50 ±18 380# 89 MJW25-48S033 3.3 6000 470 35 3.9 10300 88 MJW25-48S05 5 5000 580 40 6.2 6800 90 MJW25-48S12 48 12 2090 580 35 15 1200 90 MJW25-48S15 (36 ~ 75) 15 1670 580 35 18 750 90 MJW25-48D12 ±12 ±1040 585 40 ±15 680# 89 MJW25-48D15 ±15 ±840 590 40 ±18 380# 89 30 # For each output E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 1 of 10 ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density Input Specifications Parameter Input Surge Voltage (100ms max.) Model 12V Input Models Min. 24V Input Models -0.7 -0.7 Typ. --- Max. Unit 25 --50 ---0.7 100 VDC 12V Input Models ----9 24V Input Models ----18 48V Input Models ----36 None ----30 ms Nominal Vin and Constant Resistive Load ----30 ms All Models LC Filter (for EN55022,Class A or Class B compliance see page 9) Hiccup Mode, 0.7Hz typ. 48V Input Models Start-Up Threshold Voltage Input Polarity Protection Power Up Remote On/Off Start Up Time Internal Filter Type Short Circuit Current Output Specifications Parameter Output Voltage Setting Accuracy Output Voltage Balance Line Regulation Load Regulation Cross Regulation (Dual) Min.Load Ripple & Noise (20MHz) Ripple & Noise (20MHz) Transient Recovery Time Temperature Coefficient Over Load Protection Short Circuit Protection Over Voltage Protection Conditions At 50% Load and Nominal Vin Dual Output, Balanced Loads Vin=Min. to Max. Single Output No Load to Full Load Dual Output Asymmetrical load 25% / 100% FL Min. --- Typ. --- Max. ±1.0 Unit %Vnom. ----------- ----- ±2.0 ±0.2 ±0.2 ±1.0 ±5.0 % % % % % ------±0.02 mV P-P mV P-P μsec %/℃ Min. Typ. Max. 1500 ----1000 --------2000 --285 --MIL-HDBK-217F@25℃, Ground Benign 372,000 ----UL/cUL 60950-1 recognition(CSA certificate), IEC/EN 60950-1(CB-scheme) Unit VDC MΩ pF KHz Hours ------- No minimum Load Requirement --100 --150 --250 ----Current Limitation at 150% typ. of Iout max., Hiccup Hiccup Automatic Recovery For Shutdown Voltage see Model Selection Guide 3.3V & 5V Models 12V , 15V & Dual Models 25% Load Step Change General Specifications Parameter I/O Isolation Voltage (rated) I/O Isolation Resistance I/O Isolation Capacitance Switching Frequency MTBF(calculated) Conditions 60 Seconds 500 VDC 100KHz, 1V Safety Approvals(pending) Input Fuse 12V Input Models 5000mA Slow-Blow Type 24V Input Models 2500mA Slow-Blow Type 48V Input Models 1250mA Slow-Blow Type 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 Supply Off & Nominal Vin E-mail:[email protected] 2013/01/25 P4 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 3 --- mA ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density Output Voltage Trim Parameter Trim Up / Down Range Conditions % of Nominal Output Voltage Min. ±10 Typ. --- Max. --- Unit % Environmental Specifications Parameter Model Min. MJW25-24S033, MJW25-48S033 MJW25-24S05, MJW25-24S12 MJW25-24S15, MJW25-48S05 MJW25-48S12, MJW25-48S15 MJW25-12S033 MJW25-12S05, MJW25-12S12,MJW25-12S15 MJW25-12D12, MJW25-12D15 MJW25-24D12, MJW25-24D15 MJW25-48D12, MJW25-48D15 Operating Ambient Temperature Range (Natural Convection, see Derating) Thermal Impedance -40 Max. without Heatsink 57 with Heatsink 65 56 64 53 61 50 59 Unit ℃ Natural Convection without Heatsink 17.6 --- ℃/W Natural Convection with Heatsink 14.8 --- ℃/W 100LFM Convection without Heatsink 13.6 --- ℃/W 100LFM Convection with Heatsink 8.5 --- ℃/W 200LFM Convection without Heatsink 11.8 --- ℃/W 200LFM Convection with Heatsink 6.5 8.8 --- ℃/W 400LFM Convection without Heatsink --- ℃/W 400LFM Convection with Heatsink 4.3 --+105 +125 95 ℃/W ℃ ℃ % rel. H Case Temperature Storage Temperature Range Humidity (non condensing) Cooling RFI Lead Temperature (1.5mm from case for 10Sec.) ---50 --Free-Air convection Six-Sided Shielded, Metal Case --- 260 ℃ EMC Specifications Parameter EMI ESD Radiated immunity Fast transient (See Note 7) Surge (See Note 7) Conducted immunity E-mail:[email protected] 2013/01/25 P4 Standards & Level EN55022 EN61000-4-2 air ± 8KV , Contact ± 6KV EN61000-4-3 10V/m EN61000-4-4 ±2KV EN61000-4-5 ±1KV EN61000-4-6 10V/m Tel:886-6-2923150 Page 3 of 10 Performance Class A /Class B (See Page 9) Perf. Criteria A Perf. Criteria A Perf. Criteria A Perf. Criteria A Perf. Criteria A ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density Power Derating Curve 100 Natural Convection 20LFM Output Power (%) Output Power (%) 80 100LFM 60 200LFM 400LFM 40 20 0 ~ -40 0 20 40 60 80 100 110 80 100 110 Ambient Temperature C MJW25-24S033, MJW25-48S033 Derating Curve without Heatsink MJW25-24S033, MJW25-48S033 Derating Curve with Heatsink 100 Natural Convection 20LFM Output Power (%) Output Power (%) 80 100LFM 60 200LFM 400LFM 40 20 0 ~ -40 0 20 40 60 Ambient Temperature C MJW25-24S05,MJW25-24S12,MJW25-24S15,MJW25-48S05 MJW25-48S12,MJW25-48S15 Derating Curve without Heatsink MJW25-24S05,MJW25-24S12,MJW25-24S15,MJW25-48S05 MJW25-48S12,MJW25-48S15 Derating Curve with Heatsink 100 Natural Convection 20LFM Output Power (%) Output Power (%) 80 100LFM 60 200LFM 400LFM 40 20 0 ~ -40 0 20 40 60 80 100 110 Ambient Temperature C MJW25-12S033 Derating Curve with Heatsink MJW25-12S033 Derating Curve without Heatsink 100 Natural Convection 20LFM Output Power (%) Output Power (%) 80 100LFM 60 200LFM 400LFM 40 20 0 ~ -40 0 20 40 60 80 100 110 Ambient Temperature C MJW25-12S05, MJW25-12S12, MJW25-12S15, MJW25-12D12 MJW25-12S05, MJW25-12S12, MJW25-12S15, MJW25-12D12 MJW25-12D15, MJW25-24D12, MJW25-24D15,MJW25-48D12,MJW25-48D15 MJW25-12D15, MJW25-24D12, MJW25-24D15,MJW25-48D12,MJW25-48D15 Derating Curve with Heatsink Derating Curve without Heatsink E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 4 of 10 ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density 100 100 90 90 Efficiency(%) Efficiency(%) Efficiency Curve @25℃ 80 70 60 80 70 60 9V 50 9V 50 12V 18V 40 10 20 30 40 50 60 70 80 90 12V 18V 40 100 10 20 30 40 % of Full Load 60 70 80 90 100 % of Full Load MJW25-12S033 Efficiency vs Load Current MJW25-12S05 Efficiency vs Load Current 100 100 90 90 Efficiency(%) Efficiency(%) 50 80 70 60 80 70 60 9V 50 9V 50 12V 18V 40 10 20 30 40 50 60 70 80 90 12V 18V 40 100 10 20 30 40 % of Full Load 60 70 80 90 100 % of Full Load MJW25-12S12 Efficiency vs Load Current MJW25-12S15 Efficiency vs Load Current 100 100 90 90 Efficiency(%) Efficiency(%) 50 80 70 60 80 70 60 9V 50 9V 50 12V 18V 40 10 20 30 40 50 60 70 80 90 12V 18V 40 100 10 20 30 40 % of Full Load 60 70 80 90 100 % of Full Load MJW25-12D12 Efficiency vs Load Current MJW25-12D15 Efficiency vs Load Current 100 100 90 90 Efficiency(%) Efficiency(%) 50 80 70 60 80 70 60 18V 50 24V 36V 40 10 20 30 40 50 60 70 80 90 % of Full Load MJW25-24S033 Efficiency vs Load Current E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 5 of 10 100 18V 50 24V 36V 40 10 20 30 40 50 60 70 80 90 % of Full Load MJW25-24S05 Efficiency vs Load Current 100 ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density 100 100 90 90 Efficiency(%) Efficiency(%) Efficiency Curve @25℃ 80 70 60 80 70 60 18V 50 18V 50 24V 36V 40 10 20 30 40 50 60 70 80 90 24V 36V 40 100 10 20 30 40 % of Full Load 60 70 80 90 100 % of Full Load MJW25-24S12 Efficiency vs Load Current MJW25-24S15 Efficiency vs Load Current 100 100 90 90 Efficiency(%) Efficiency(%) 50 80 70 60 80 70 60 18V 50 18V 50 24V 36V 40 10 20 30 40 50 60 70 80 90 24V 36V 40 100 10 20 30 40 % of Full Load 60 70 80 90 100 % of Full Load MJW25-24D12 Efficiency vs Load Current MJW25-24D15 Efficiency vs Load Current 100 100 90 90 Efficiency(%) Efficiency(%) 50 80 70 60 80 70 60 36V 50 36V 50 48V 75V 40 10 20 30 40 50 60 70 80 90 48V 75V 40 100 10 20 30 40 % of Full Load 60 70 80 90 100 % of Full Load MJW25-48S033 Efficiency vs Load Current MJW25-48S05 Efficiency vs Load Current 100 100 90 90 Efficiency(%) Efficiency(%) 50 80 70 60 80 70 60 36V 50 48V 75V 40 10 20 30 40 50 60 70 80 90 % of Full Load MJW25-48S12 Efficiency vs Load Current E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 6 of 10 100 36V 50 48V 75V 40 10 20 30 40 50 60 70 80 90 % of Full Load MJW25-48S15 Efficiency vs Load Current 100 ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density 100 100 90 90 Efficiency(%) Efficiency(%) Efficiency Curve @25℃ 80 70 60 80 70 60 36V 50 48V 75V 40 10 20 30 40 50 60 70 80 90 100 36V 50 48V 75V 40 10 20 30 40 % of Full Load 50 60 70 80 90 100 % of Full Load MJW25-48D12 Efficiency vs Load Current MJW25-48D15 Efficiency vs Load Current Notes 1 Specifications typical at Ta=+25℃, resistive load, nominal input voltage, rated output current unless otherwise noted. 2 Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%. 3 Ripple & Noise measurement bandwidth is 20 MHz, measured with a 1μF MLCC and a 10μF Tantalum Capatitor. 4 All DC/DC converters should be externally fused at the front end for protection. 5 Other input and output voltage may be available, please contact factory. 6 To order the converter with heatsink, please add a suffix -HS (e.g. MJW25-24S05-HS) to order code. 7 The MJW25 series can meet EN61000-4-4 & EN61000-4-5 by adding a capacitor across the input pins.Suggested capacitor:CHEMI-CON KY 220μF/100V. 8 That “natural convection” is about 20LFM but is not equal to still air (0 LFM). 9 Specifications are subject to change without notice. Package Specifications Mechanical Dimensions Pin Connections 2.54 [0.10] 25.4 [1.00] 10.16 [0.40] 10.16 [0.40] Bottom View 1 2 6 1.00 [0.04] 20.3 [0.80] 5 25.4 [1.00] 4 3 6.0 10.16 0.5 [0.24] [0.40 0.02] Pin Single Output Dual Output 1 +Vin +Vin 2 -Vin -Vin 3 +Vout +Vout 4 Trim Common 5 -Vout -Vout 6 Remote On/Off Remote On/Off ►All dimensions in mm (inches) ►Tolerance: X.X±0.25 5.08 [0.20] 7.62 [0.30] 2.54 [0.10] Physical Characteristics Case Size : 25.4x25.4x10.16mm (1.0x1.0x0.4 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 : 16.5g E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 7 of 10 (X.XX±0.01) X.XX±0.13 ( X.XXX±0.005) ►Pin diameter 1.0 ±0.05 (0.04±0.002) ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density Heatsink (Option –HS) Mechanical Dimensions Heatsink Material: Aluminum Finish: Anodic treatment (black) 16.3 [0.64] Weight: 2g 17.46 [0.69] Max. ►The 31.0 [1.22] Max. advantages of adding a heatsink are: 1.To help heat dissipation and increase the stability and reliability of DC/DC converters at high operating temperature atmosphere. Heat-Sink Thermal Pad Clamp Converter 2.To upgrade the operating temperature of DC/DC converters, please refer to Derating Curve. External Output Trimming Output can be externally trimmed by using the method shown below Rd Ru 3 4 5 3 2 1 6 2 6 Trim Down Trim Up MJW25-XXS033 Trim Table Trim down 1 Vout= Vox0.99 Rd= 63.59 5 MJW25 Module Bottom View MJW25 Module Bottom View 1 4 2 Vox0.98 30.28 3 Vox0.97 18.19 4 Vox0.96 11.95 5 Vox0.95 8.13 6 Vox0.94 5.56 7 Vox0.93 3.70 8 Vox0.92 2.31 9 Vox0.91 1.21 10 Vox0.90 0.34 % Volts KOhms 2 Vox1.02 29.28 3 Vox1.03 16.87 4 Vox1.04 10.90 5 Vox1.05 7.38 6 Vox1.06 5.06 7 Vox1.07 3.42 8 Vox1.08 2.20 9 Vox1.09 1.25 10 Vox1.10 0.49 % Volts KOhms 2 Vox0.98 20.61 3 Vox0.97 12.31 4 Vox0.96 8.15 5 Vox0.95 5.66 6 Vox0.94 4.00 7 Vox0.93 2.81 8 Vox0.92 1.92 9 Vox0.91 1.23 10 Vox0.90 0.68 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 36.57 MJW25-XXS12 Trim Table Trim down 1 Vout= Vox0.99 Rd= 394.50 2 Vox1.02 16.58 3 Vox1.03 9.92 4 Vox1.04 6.59 5 Vox1.05 4.59 6 Vox1.06 3.25 7 Vox1.07 2.30 8 Vox1.08 1.59 9 Vox1.09 1.03 10 Vox1.10 0.59 % Volts KOhms 2 Vox0.98 179.74 3 Vox0.97 106.08 4 Vox0.96 68.86 5 Vox0.95 46.39 6 Vox0.94 31.36 7 Vox0.93 20.60 8 Vox0.92 12.51 9 Vox0.91 6.21 10 Vox0.90 1.17 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 368.92 MJW25-XXS15 Trim Table Trim down 1 Vout= Vox0.99 Rd= 572.67 2 Vox1.02 161.92 3 Vox1.03 94.97 4 Vox1.04 61.86 5 Vox1.05 42.12 6 Vox1.06 29.00 7 Vox1.07 19.66 8 Vox1.08 12.66 9 Vox1.09 7.23 10 Vox1.10 2.89 % Volts KOhms 2 Vox0.98 248.63 3 Vox0.97 145.60 4 Vox0.96 94.97 5 Vox0.95 64.87 6 Vox0.94 44.92 7 Vox0.93 30.72 8 Vox0.92 20.10 9 Vox0.91 11.86 10 Vox0.90 5.28 % Volts KOhms 2 Vox1.02 182.12 3 Vox1.03 108.73 4 Vox1.04 71.43 5 Vox1.05 48.85 6 Vox1.06 33.71 7 Vox1.07 22.86 8 Vox1.08 14.69 9 Vox1.09 8.33 10 Vox1.10 3.23 % Volts KOhms Trim up 1 Vout= Vox1.01 Ru= 70.50 MJW25-XXS05 Trim Table Trim down 1 Vout= Vox0.99 Rd= 45.53 Trim up Vout= Ru= 1 Vox1.01 392.98 E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 8 of 10 ® MJW25 SERIES DC/DC CONVERTER 25W, Highest Power Density EMI-Filter to meet EN 55022, class A, class B; FCC part 15 ,level A Conducted and radiated emissions EN55022 Class A, Class B Class Class A Class B Model C1 C2 C3 C4&C5 L1 MJW25-12XXX None 3.3μF/25V 1210 MLCC None None 1μH MJW25-24XXX None 3.3μF/50V 1210 MLCC None None 2.2μH MJW25-48XXX None 3.3μF/100V 1210 MLCC None None 4.7μH MJW25-12XXX 3.3μF/25V 1210 MLCC 3.3μF/25V 1210 MLCC 3.3μF/25V 1210 MLCC 1800 pF/2KV 1206 MLCC 1μH MJW25-24XXX 3.3μF/50V 1210 MLCC 3.3μF/50V 1210 MLCC 3.3μF/50V 1210 MLCC 1800 pF/2KV 1206 MLCC 2.2μH MJW25-48XXX 3.3μF/100V 1210 MLCC 3.3μF/100V 1210 MLCC 3.3μF/100V 1210 MLCC 1800 pF/2KV 1206 MLCC 4.7μH E-mail:[email protected] 2013/01/25 P4 Tel:886-6-2923150 Page 9 of 10 ® MJW25 SERIES DC/DC CONVERTER 25W, 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 Current Probe Cin +Out DC / DC Converter -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 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 6) during a logic low is -500uA. The maximum allowable leakage current of a switch connected to the on/off terminal (Pin 6) at logic high (3.5V to 12V) is 10mA. 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 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 DC Power Source - +Out Single Output DC / DC Converter -Vin Cout Load -Out Maximum Capacitive Load The MJW25 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. 2013/01/25 P4 Page 10 of 10