BCM Bus Converter BCM352x125y300A00 S CUNRTL S C US Isolated Fixed Ratio DC-DC Converter Features & Benefits Product Ratings 352V 12.5V 300W Bus Converter V = 352V (330 365V) P = up to 300W DC DC IN OUT High efficiency (>95%) reduces V = 12.5V (11.79 13.04V) OUT K = 1/28 (no load ) system power consumption 3 High power density (1000W/in ) reduces Description power system footprint by >40% Full Chip VI Chip package enables surface mount, The VI Chip Bus Converter is a high efficiency (>95%) Sine TM Amplitude ConverterTM (SAC ) operating from a 330 to 365V low impedance interconnect to system board DC primary bus to deliver an isolated ratiometric output voltage from Contains built-in protection features against: 11.79 to 13.04V . The SAC offers a low AC impedance beyond DC n Undervoltage the bandwidth of most downstream regulators, meaning that n Overvoltage input capacitance normally located at the input of a regulator can be located at the input to the SAC. Since the K factor of the n Overcurrent BCM352x125y300A00 is 1/28, that capacitance value can be n Short Circuit reduced by a factor of 784x, resulting in savings of board area, n Overtemperature materials and total system cost. Provides enable/disable control, The BCM352F125y300A00 is provided in a VI Chip package internal temperature monitoring compatible with standard pick-and-place and surface mount assembly processes. The VI Chip package provides flexible thermal ZVS/ZCS Resonant Sine Amplitude Converter topology management through its low junction-to-case and junction-to- Can be paralleled to create multi-kW arrays board thermal resistance. With high conversion efficiency the BCM352x125y300A00 increases overall system efficiency and lowers operating costs compared to conventional approaches. Typical Application High End Computing Systems Part Numbering Automated Test Equipment High Density Power Supplies Product Number Package Style (x) Product Grade (y) F = J-Lead BCM352x125y300A00 T = -40 to 125C T = Through hole For Storage and Operating Temperatures see Section 6.0 General Characteristics Typical Application PC POL enable / disable TM switch POL BCM SW1 F1 POL +IN +OUT V C1 1F V OUT IN POL (8) -IN -OUT BCM Bus Converter Rev 2.0 vicorpower.com Page 1 of 21 08/2016 800 927.9474BCM352x125y300A00 Pin Configuration 43 21 A A B B +OUT +IN C C D D E E F -OUT G TM H H J RSV J K K PC +OUT L L M M N N -IN P P R -OUT R T T Bottom View Pin Descriptions Pin Number Signal Name Type Function A1-E1, A2-E2 +IN INPUT POWER Positive input power terminal INPUT POWER L1-T1, L2-T2 IN Negative input power terminal RETURN H1, H2 TM OUTPUT Temperature monitor, input side referenced signal J1, J2 RSV NC No connect K1, K2 PC OUTPUT/INPUT Enable and disable control, input side referenced signal A3-D3, A4-D4, +OUT OUTPUT POWER Positive output power terminal J3-M3, J4-M4 E3-H3, E4-H4, OUTPUT POWER OUT Negative output power terminal N3-T3, N4-T4 RETURN Control Pin Specifications See Using the Control Signals PC, TM for more information. PC (BCM Primary Control) TM (BCM Temperature Monitor) The PC pin can enable and disable the BCM module. When held The TM pin monitors the internal temperature of the BCM module below V the BCM shall be disabled. When allowed to PC DIS within an accuracy of 5C. It has a room temperature setpoint of float with an impedance to IN of greater than 50k the ~3.0V and an approximate gain of 10mV/C. It can source up to module will start. When connected to another BCM PC pin 100A and may also be used as a Power Good flag to verify that (either directly, or isolated through a diode), the BCM modules the BCM module is operating. will start simultaneously when enabled. The PC pin is capable of being either driven high by an external logic signal or internal pull up to 5V (operating). BCM Bus Converter Rev 2.0 vicorpower.com Page 2 of 21 08/2016 800 927.9474