Applications Servers, Switches and Data Storage U15 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment Logic compatibility CMOS or open collector TTL Ec-on >+5.5Vdc or open circuit Ec-off <1.8Vdc Shutdown idle current 10mA Control common Referenced to input minus Basic operation and functions U15 series is single, dual and triple output DC/DC converters provide from 9.9 watts up to 15 watts of output power in an industry standard 2”x2” size package. The U15 series features 4:1 input voltage range, high efficiency, fixed switching frequency at 300KHz, continuous short circuit protection, six-side continuous shield and 500VDC isolation. Protection Features Input under voltage lockout (UVLO) Input (Vi+ , Vi-) Input power Vin+ must be connected to Positive input voltage(+Vin) ; Input power Vinmust be connected to Negative voltage(-Vin). Output (Vo+ , Vo- ) • Networking Gear • Data Communications • Telecommunications • Industrial / Medical 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 threshold. The hystersis voltage of the unit voltage protection is 1.0V(typ.), normally from the 7.5V to 8.5V range at input voltage is 24V. Output power Vout+ must be connected to Output over current protection (OCP) and Positive output voltage (+Vout) ; Output power output short protection Vout- must be Negative output voltage (-Vout). 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 . The attempted restart will continue indefinitely until the over current or short circuit condition is removed. On / Off The output allows the user to switch the module on and off electronically by remote on/off feature. This is only Positive logic remote control options available. The remote must use the CMOS or open collector TTL to control on/off pin. CH1:+5Vout/OCP Ch2:-12Vout/OCP CH3:-12Vout/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 U15 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:+5Vout/short Ch2:-12Vout/short CH3:-12Vout/short CH1: 24Vin CH2: 5Vout/FL Start up delay time: 210ms Characterization General information The U15 unit has many operational characterized aspects, including efficiency, start up, overshoot, output ripple & noise, 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. Efficiency Efficiency vs. load current is given below. The ambient temperature is 25C, airflow is 20LFM(0.1m/s), and the input voltage is 9V, 24V and 36V conditions. CH1: 24Vin CH2: +12Vout/FL CH3: -12Vout/FL Start up delay time: 213ms The input start-up from remote on/off control and input voltage is 24V. U15-48T5-12 EFF. vs Load 90% 80% 70% EFF.(%) 60% 50% 40% 30% 20% 10% 0% 9Vdc 24Vdc 36Vdc 0 10 20 30 40 50 60 70 80 90 100 Load(%) CH1: Remote CH2: 5Vout/FL Start up delay time: 190ms 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 U15 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment • Networking Gear • Data Communications • Telecommunications • Industrial / Medical Overshoot and rise time The input start-up from power supply. The output voltage waveform measured at full load current. CH1: Remote CH2: +12Vout/FL CH3: -12Vout/FL Start up delay time: 190ms 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: +5Vout/FL Ripple: 19.6mVp-p CH1: +5Vout/FL Overshoot: zero % Rise time: 50.91ms CH1: +12Vout/FL Ch2: -12Vout/FL Overshoot: zero % Rise time: 51.30ms / 51.67ms CH1: +12Vout/FL CH2: -12Vout/FL Ripple: 40.0mVp-p / 14.8mVp-p 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 U15 Series DC/DC Converters •• Wireless Communications • Distributed Power Architecture Application Notes • Semiconductor Test Equipment • Networking Gear • Data Communications • Telecommunications • Industrial / Medical Hold time The hold time is measure from the power supply end to when Vout drop down to 90% output. CH1: +5Vout Ch2: +12Vout CH3: -12Vout Iout: 0.1A/us Load change 50%-100%-50% CH1: 24Vin Ch2: +5Vout/FL Hold time: 120us CH1: 24Vin CH2: +12Vout/FL Ch3: -12Vout/FL Hold time: 128us CH1: +5Vout Ch2: +12Vout CH3: -12Vout Iout: 0.1A/us Load change 25%-75%-25% Input ripple current Dynamic response Output voltage dynamic response at 24Vin and different load condition. Output with a 0.1uF ceramic capacitor. input ripple current: 240mAp-p 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