Isolated DC-DC Converters BRA20W Series -- 20 Watt Bothhand USA Features Wide 4 : 1 Input Voltage Range(9~36V,18~75V) High Efficiency up to 91% 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 BRA20W 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 1”X1” Package footprint. Further features include wide 4 : 1 input voltage range, remote on/off control, trimmable output, short-circuit Customer Design Available protection and over voltage protection. Safety Standard / Approval : IEC / EN 60950-1 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 Eff . (%) Capacitive (3) Load, max. (uF) (2) BRA20-24S0W 3.3 0 4500 63 755 86 24700 BRA20-24S1W 5 0 4000 65 992 88 14700 12 0 1670 83 970 90 4700 BRA20-24S2W 9~36V Nominal:24V 15 0 1330 70 967 90 2200 BRA20-24D2W ±12 ±40 ±833 60 992 88 2200 BRA20-24D3W ±15 ±60 ±667 83 981 89 1000 BRA20-48S0W 3.3 0 4500 29 373 87 32200 BRA20-24S3W 5 0 4000 30 490 89 23300 12 0 1670 38 486 90 3300 15 0 1330 32 477 91 1000 BRA20-48D2W ±12 0 ±833 35 490 89 680 BRA20-48D3W ±15 0 ±667 36 490 89 470 BRA20-48S1W BRA20-48S2W BRA20-48S3W 18~75V Nominal:48V [email protected] www.bothhandusa.com Rev:20130813A Page 1 of 8 Isolated DC-DC Converters BRA20W Series -- 20 Watt Bothhand USA Input Specifications Input Voltage 24V nominal input 9-36V 48V nominal input 18-75V Pi Type Input filter 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 60mAp-p max. 76ms 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 ＜12 mA Environmental Specifications -40°C to +85°C (with derating) Operating ambient temperature +105°C max. Maximum case temperature -55°C to +125°C Storage temperature range 95% RH max. Relative humidity ±0.02% / °C max. Temperature coefficient Output Specifications 20 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 ±1.0% Single ±1.0% Dual ±0.5% Unbalanced load 25% to 100% full load Ripple and Noise ±5% 20MHz bandwidth 80mVp-p max. 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) 700µs max. 50% load step change (1.4ms for 3.3Vout) Transient response over shoot ≤ ±5% of Vo di/dt=0.8A/µs (≤ ±6% for 3.3Vout) [email protected] www.bothhandusa.com Rev:20130813A Page 2 of 8 Isolated DC-DC Converters BRA20W Series -- 20 Watt Bothhand USA General Specifications Efficiency Nominal input Isolation voltage Input to output Isolation resistance See table 1500VDC 9 500VDVC 10 Ohms min. Isolation capacitance 450pF typ. Switching frequency 330kHz typ. 6 Reliability, calculated MTBF 0.35 × 10 Hrs Physical Specifications Case material Nickel-coated copper Base material Non conductive FR4 Silicon rubber (UL94V-0) Potting material 1.0 × 1.0 × 0.4 Inch Dimensions (25.4 × 25.4 × 10.2 mm) Weight 19.2g (0.68oz) typ. Power Derating Curve (Without Heatsink) Power Derating Curve (With Heatsink) 120 Output Power (%) Output Power (%) 120 100 80 60 40 20 0 -40 -20 0 20 40 50 100 80 60 40 20 0 60 80 100 120 -40 -20 0 Ambient Temp.TA (℃) BRA20-48S1W Efficiency % Efficiency % 100 4 [email protected] 3.6 Input voltage (V) 3.2 75 2.8 66 2.4 60 2 54 1.6 48 1.2 42 0.8 36 80 95 90 85 80 75 70 65 60 55 50 0.4 30 60 Output Current vs. Efficiency 95 90 85 80 75 70 65 60 55 50 24 40 BRA20-48S1W Input voltage vs. Efficiency 18 20 Ambient Temp.TA (℃) Output Current (A) www.bothhandusa.com Rev:20130813A Page 3 of 8 120 Bothhand USA BRA20-48S1W Isolated DC-DC Converters BRA20W Series -- 20 Watt BRA20-48S1W Transient Response at 50%~100% Max Load Loop Gain & Phase at Vi=48V,Full Load 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). Mechanical Dimensions Pin 1 2 3 4 5 6 Pin Assignment Single Dual +Vin +Vin -Vin -Vin +Vout +Vout Trim Common -Vout -Vout Remote On/Off (optional) Unit: mm [inch] Tolerance:±0.5[0.02] Specifications subject to change without noticed. [email protected] www.bothhandusa.com Rev:20130813A Page 4 of 8 Bothhand USA Isolated DC-DC Converters BRA20W Series -- 20 Watt Heat-sink Material: Aluminum Weight: 4.2g (0.15oz) Note: The product label on converter has to be removed before mounting the heat-sink. For volume orders, converters will be supplied with heat-sink already mounted. Please contact factory for quotation. Separate heat-sinks are only available for prototypes and small quantity orders. Specifications subject to change without notice. [email protected] www.bothhandusa.com Rev:20130813A Page 5 of 8 Isolated DC-DC Converters BRA20W 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:20130813A Page 6 of 8 Isolated DC-DC Converters BRA20W 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. Δ Vout Δ Vin ΔVout = Vout(+10%)-Vout(-10%) x100% Vout Line regulation= 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:20130813A Page 7 of 8 Isolated DC-DC Converters BRA20W Series -- 20 Watt Bothhand USA Output Ripple&Noise measurement test circuit: as shown below. Copper strip DC/DC converter Co Load Oscilloscope 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 60 40 20 0 -40 -20 0 20 40 50 60 80 100 120 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. [email protected] www.bothhandusa.com Rev:20130813A Page 8 of 8