Applications Servers, Switches and Data Storage U10 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment • Networking Gear • Data Communications • Telecommunications • Industrial / Medical Basic operation and functions U10 series is single and dual output DC/DC converters provide form 6.6 watts up to 10watts of output power in an industry standard 1”x2” size package. The U10 series features 4:1 input voltage range, high efficiency, fixed switching frequency 300KHz, continuous short circuit protection, six-side continuous shield and 500VDC isolation. Protection Features Input under voltage lockout(UVLO) Input under voltage lockout(UVLO) is standard with the U10 unit. The unit will shut down when the input voltage drops below a threshold, and the unit will turn on when the input voltage goes to the upper thershold. The hystersis voltage of the unit voltage protection is 0.4V(tvpical), normally from the 8V to 7.6V range. Input (Vi+ , Vi-) Input power Vin+ must be connected to Positive input voltage(Vi+) ; Input power Vin- must be connected to Negative voltage(Vi-). Output over current protection(OCP) and output short protection The unit will auto recovery current limit when the over current or short circuit condition exists. Once the OCP happens, the unit has auto recovery current limit and output voltage above 6V. The attempted restart will continue indefinitely until the over current or short circuit condition is removed. Output (Vo+ , Vo- ) Output power Vout+ must be connected to Positive output voltage (Vo+) ; Output power Vout- must be Negative output voltage (Vo-). CH1:+Vout/OCP Ch2:-Vout/OCP 1/4 • • Intronics Power Inc. 1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone: 1-781-551-5500 Fax: 1-781-551-5555 Rev. B Applications Servers, Switches and Data Storage U10 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment When output short happens, the output voltage drops below 0.2V. • Networking Gear • Data Communications • Telecommunications • Industrial / Medical Characterization General information The U10 unit has many operational characterized aspects, including efficiency, start up , overshoot, output ripple & noise, hold time, dynamic response to load and input ripple current. The following pages contain specific plots or waveforms associated with the unit. Additional comments for specific data are provided below. And all test function at 24Vinput. CH1:+Vout/short Ch2:-Vout/short Efficiency Efficiency vs load current is given below. The ambient temperature is 25℃, airfolw is 20LFM(0.1m/s), and the input voltage is 9V, 24V and 36V conditions. U10-24D12 Eff. 2/4 • • Intronics Power Inc. 1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone: 1-781-551-5500 Fax: 1-781-551-5555 Rev. B Applications Servers, Switches and Data Storage U10 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment • Networking Gear • Data Communications • Telecommunications • Industrial / Medical Start up The input start-up from power supply. CH1:+Vout/NL Ch2:-Vout/NL Overshoot:zero % Rise time:3.719ms / 3.756ms Output Ripple and Noise The output voltage waveform measured at minimum load and full load current, with a 0.1uF ceramic capacitor across to close unit. CH1:Vin=24V CH2:Vout=24V / FL Start up delay time:5.84ms Overshoot and rise time The input start-up from power supply. The output voltage waveform measured at minimum load and full load current. CH1:+Vout/FL Ch2:-Vout/FL Ripple:36.4mVp-p / 31.6mVp-p Hold time The hold time is measure from the power supply end or on/off pin is off to when Vout drop down to 90% output. CH1:+Vout/FL Ch2:-Vout/FL Overshoot:zero % Rise time:2.183ms / 2.178ms 3/4 • • Intronics Power Inc. 1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone: 1-781-551-5500 Fax: 1-781-551-5555 Rev. B Applications Servers, Switches and Data Storage U10 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment • Networking Gear • Data Communications • Telecommunications • Industrial / Medical CH1:Vout Ch2:Iout, 0.1A/us Load change 25%-75%-25% Input ripple current CH1:Vin Ch2:Vout/FL Hold time:440us Dynamic response Output voltage dynamic response at Vin=24V and different load condition. Output with a 0.1uF ceramic capacitor. CH1:Vout Ch2:Iout, 0.1A/us Load change 50%-100%-50% 4/4 • • Intronics Power Inc. 1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone: 1-781-551-5500 Fax: 1-781-551-5555 Rev. B