PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt Bothhand USA Features Wide 4 : 1 Input Voltage Range(9~36V,18~75V) High Efficiency up to 90% Remote On/Off Input / Output Isolation Voltage: 1.5K VDC Extended Operating Temperature Range: -40°C to+85°C Output Short Circuit Protection: Hiccup, continuous & Auto Recovery Over Voltage Protection: Clamp Mode Description Shielded Metal Case with Insulated Baseplate The BUC20W Series are isolated 20W DC/DC converters. Designed with highly efficiency, allow the operating Lead Free Design, RoHS Compliant temperature range of these units to be -40°C to +85°C (with 6 pin DIP Package with Industry-Standard Footprint derating) in a 6 pin DIP package with industry-standard Standard 2”X1” Package footprint. Further features include wide 4 : 1 input voltage range, remote on/off control, trimmable output, short-circuit Customer Design Available protection, over voltage protection and over temperature protection. Applications These converters are well suitable for battery operated equipment, measurement equipment, telecom, wireless network, Industry control system, everywhere where isolated, tightly regulated voltages and compact size are required. Technical Specification Model Number Input Voltage Range All specifications are typical at nominal input, full load and 25°C unless otherwise stated. Output Voltage (V) Output Current (mA) Min. Load (1) Input Current (mA) Full. Load No Load Full Load 0 5500 70 945 Eff . (%) Capacitive (3) Load, max. (uF) 84 33000 (2) BUC20-24S0W 3.3 BUC20-24S1W 5.1 0 4000 86 1012 88 18000 BUC20-24S2W 12 150 1670 38 1006 87 3300 15 80 1330 49 990 88 2200 BUC20-24D1W ±5 0 ±2000 91 992 88 8200 BUC20-24D2W ±12 ±25 ±835 45 1006 87 1000 BUC20-24D3W ±15 0 ±665 95 1002 87 900 BUC20-48S0W 3.3 0 5500 25 461 86 33000 BUC20-48S1W 5.1 0 4000 38 500 89 18000 BUC20-48S2W 12 90 1670 40 491 89 3300 15 55 1330 37 489 89 2200 ±5 0 ±2000 39 484 90 8200 491 89 1000 495 88 900 BUC20-24S3W BUC20-48S3W 9~36V Nominal:24V 18~75V Nominal:48V BUC20-48D1W BUC20-48D2W ±12 ±10 ±835 42 BUC20-48D3W ±15 0 ±665 43 [email protected] www.bothhandusa.com Rev:20130814A Page 1 of 7 PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt Bothhand USA Input Specifications Input Voltage 24V nominal input 9-36V 48V nominal input 18-75V Input filter Pi Type Input surge voltage 24V nominal input 50V (100ms max.) 48V nominal input 100V Input reflected ripple current Nominal Vin and full load Start up time Nominal Vin and constant resistive load Remote ON/OFF 100mAp-p typ. 80ms typ. Open or 3.5V＜Vr＜12V Converter: ON Short Converter: OFF (4) or 0V＜Vr＜0.7V Sourcing current of remote control pin Nominal Vin ＜0.2 mA Idle input current (at Remote OFF state) Nominal Vin ＜15 mA Environmental Specifications -40°C to +85°C (with derating) Operating ambient temperature +100°C Maximum case temperature -55°C to +105°C Storage temperature range 95% RH max. Relative humidity ±0.02% / °C max. Temperature coefficient Output Specifications 20.4 Watts max. Output power Voltage accuracy Full load and nominal Vin ±1% See table Minimum load Line regulation LL to HL at full load 25% load to full load Load Regulation Balanced load ±0.5% Single ±0.5% Dual ±0.5% Unbalanced load 25% to 100% full load Ripple and Noise ±3% 20MHz bandwidth 85mVp-p max. (Measured with a 2.2uF/50V MLCC) 3.3Vout models 3.9V Over voltage protection 5.1Vout models 6.2V (Zener Diode Clamp) 12Vout models 15V 15Vout models 18V See table Capacitive load Over load protection % of full load at nominal input Short circuit protection Transient response settling time 110% min. Hiccup, continuous (Auto Recovery) 300µs typ. 50% load step change (1.8ms for 3.3Vout) Transient response over shoot ≤ ±5% of Vo di/dt=0.8A/µs (≤ ±8% for 3.3Vout) [email protected] www.bothhandusa.com Rev:20130814A Page 2 of 7 PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt Bothhand USA General Specifications Efficiency Nominal input Isolation voltage Input to output Isolation resistance See table 1500VDC 9 500VDC 10 Ohms min. Isolation capacitance 1200pF typ. Switching frequency 300kHz typ. 6 Reliability, calculated MTBF 1.06 × 10 Hrs Physical Specifications Case material Nickel-coated copper Base material Non-conductive black plastic Silicon rubber (UL94V-0) Potting material 2.0 × 1.0 × 0.4 Inch Dimensions (50.8 × 25.4 × 10.2 mm) Weight 32.0g (1.13oz) typ. BUC20W Series Power Derating Curve(5) 120 Output Power (%) 100 80 70 60 40 20 0 -40 -20 0 20 40 60 70 80 105 120 Ambient Temp.TA (℃) BUC20-48S1W Output Current vs. Efficiency Efficiency (%) Efficiency (%) BUC20-48S1W Input voltage vs. Efficiency Input voltage (V) [email protected] www.bothhandusa.com Output Current (A) Rev:20130814A Page 3 of 7 PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt Bothhand USA BUC20-48S1W BUC20-48S1W Transient Response at 50%~100% Max Load Loop Gain & Phase at Vi=48V,Full Loa Note 1. Io below this value will not damage these converters, however, they may not meet all listed specifications. 2. Typical value, tested at nominal input and full load. 3. For each output. 4. Short to -Vin (Pin 2). 5. Based on BUC20-48S1W. Mechanical Dimensions Pin 1 2 3 4 5 6 Pin Assignment Single Dual +Vin +Vin -Vin -Vin Remote On/Off +Vout -Vout Trim +Vout Common -Vout Unit: mm [inch] Tolerance:±0.5[0.02] Specifications subject to change without noticed. [email protected] www.bothhandusa.com Rev:20130814A Page 4 of 7 PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt Bothhand USA Test Configurations All specifications are typical at nominal input, full load and 25°C unless otherwise stated. A A DC Power Supply DC/DC converter V V Load ◎DC Power Supply: It offers a wide voltage and current range precisely. ◎Current meter (A): Accuracy 200μA ~ 200mA 4 ranges+(0.2% rdg + 2 digits) 2000mA ~ 20A 2 ranges+(0.3% rdg + 2 digits). ◎Voltage meter (V): Accuracy +(0.03% rdg + 4 digits). ◎ Load: At full load. ◎ ◎Wires: The resistance of the wires must be small. 1. Input voltage range: Narrow input voltage range（±10%）、wide input voltage range (2:1 and 4:1)。 EX: Narrow input voltage range（±10%） 5V nominal input 4.5~5.5V 12V nominal input 10.8~13.2V 24V nominal input 21.6~26.4V Wide input voltage range 2:1 5V nominal input 12V nominal input 24V nominal input 48V nominal input 4.5~9V 9~18V 18~36V 36~75V Wide input voltage range 4:1 (W) 24V nominal input 9~36V 48V nominal input 18~75V 2. Input power : Pin = Vin x Iin Vin：Input voltage Iin：Input current Pout = Vout x Iout Vout：Output voltage Iout：Output current 3. Output power : 4. Efficiency : Efficiency = Pout Pin x100% Pout: Output power Pin: Input power 5. Voltage accuracy: │ │Vout-Vout(nominal)│ Vout [email protected] x100% Vout：Output voltage Vout(nominal)：Nominal output voltage www.bothhandusa.com Rev:20130814A Page 5 of 7 PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt ││││ ││││ Bothhand USA 6. Line regulation: (1) Wide input voltage range and regulated output voltage series. │Vout(LL)-Vout(HL)│ │ Vout(LL) LL: Low Line input voltage HL: High Line input voltage x100% (2) Narrow input voltage range（±10%）and unregulated output voltage series. Line regulation= Δ Vout Δ Vin ΔVout = Vout(+10%)-Vout(-10%) x100% Vout Vout(+10%)：Output voltage at Vin = 1.1xVin(nominal)&full load Vout(-10%)：Output voltage at Vin = 0.9xVin(nominal)&full load Vout：Output voltage at Vin = Vin(nominal)&full load ΔVin = Vin(+10%)-Vin(-10%) x100% Vin(nominal) Vin(+10%)：Input voltage = 1.1xVin(nominal) Vin(-10%)：Input voltage = 0.9xVin(nominal) Vin(nominal)：Nominal Input voltage 7. Load regulation : │ x100% │Vout(FL)-Vout(NL)│ Vout(FL) Vout(FL): Output voltage at full load Vout(NL): Output voltage at 25% full load or 10% full load 8. Ripple and Noise: as shown below. The bandwidth is 0-20MHz. Ripple&Noise Noise Ripple [email protected] www.bothhandusa.com Rev:20130814A Page 6 of 7 PRELIMINARY Isolated DC-DC Converters BUC20W Series -- 20 Watt Bothhand USA Output Ripple&Noise measurement test circuit: as shown below. Copper strip DC/DC converter Co Oscilloscope Load Copper strip Co: usually 0.47uF. 9. Temperature derating curve: The DC-DC converter will operate over a wider temperature range if less power is drawn from the output and the device is already running. The temperature derating curve shows the operating power-temperature range. As shown below. Output Power (%) 120 100 80 70 60 40 20 0 -40 -20 0 20 40 60 70 80 105 120 Ambient Temp.TA (℃) 10. Switching frequency: The nominal operating frequency of the DC-DC converters. 11. Input to output isolation: The dielectric breakdown strength test between input and output circuits. This is the isolation voltage the device is capable of withstanding for a specified time, usually 1 second or 1 minute. 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