BCM Bus Converter MBCM270x338M235A00 (Previous Part VMB0004MFJ) S C US CUNRTL S Isolated Fixed Ratio DC-DC Converter Features & Benefits Product Ratings 270V 33.75V 235W Bus Converter DC DC V = 270V (240 330V) P = up to 235W IN OUT MIL-STD-704E/F Compliant V = 33.75V (30 41.25V) OUT High efficiency (>95.0%) reduces K = 1/8 (no load ) system power consumption 3 High power density (>796W/in ) Description reduces power system footprint by >40% Contains built-in protection features against: The MIL-COTS VI Chip bus converter is a high efficiency (>95.0%) n Undervoltage Sine Amplitude Converter (SAC) operating from a 240 to 330V primary bus to deliver an isolated 30 41.25V secondary voltage. n Overvoltage lockout n Overcurrent protection The MBCM270F338M235A00 is provided in a VI Chip package n Short Circuit protection compatible with standard pick-and-place and surface mount n Overtemperature protection assembly processes. Provides enable/disable control, Part Numbering internal temperature monitoring Can be paralleled to create multi-kW arrays Product Number Package Style (x) Product Grade F = J-Lead MBCM270x450M270A00 M = -55 to 125C Typical Applications T = Through hole For Storage and Operating Temperatures see General Characteristics. High Voltage 270V Aircraft Distributed Power 28V MIL-COTS PRM Interface (MP028F036M21AL) DC High Density Power Supplies Communications Systems Typical Application VC VC PR SG OS PC PC enable / disable PC TM CD TM L switch TM IL SW1 O PRM BCM VTM F1 A +IN +OUT +IN +OUT +IN +OUT C1 1 F D V IN -OUT -IN -OUT -IN -OUT -IN BCM Bus Converter Rev 1.8 vicorpower.com Page 1 of 23 08/2016 800 927.9474MBCM270x338M235A00 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 the BCM modules will start simultaneously when enabled. The PC the BCM module is operating. pin is capable of being driven high either by an external logic signal or internal pull up to 5V (operating). BCM Bus Converter Rev 1.8 vicorpower.com Page 2 of 23 08/2016 800 927.9474