BCM Bus Converter BCM48Bx120y300A00 S CUNRTL S C US Isolated Fixed Ratio DC-DC Converter Features & Benefits Product Ratings 48V 12V 300W Bus Converter V = 48V (38 55V) P = up to 300W DC DC IN OUT High efficiency (>96%) reduces system V = 12V (9.5 13.8V) OUT K = 1/4 (no load ) power consumption 3 High power density (>1022W/in ) Description reduces power system footprint by >40% Contains built-in protection features: The VI Chip bus converter is a high efficiency (>96%) Sine Amplitude Converter (SAC) operating from a 38 to 55V Undervoltage DC primary bus to deliver an isolated, ratiometric output voltage from Overvoltage Lockout 9.5 to 13.8V . The Sine Amplitude Converter offers a low AC DC Overcurrent Protection impedance beyond the bandwidth of most downstream regulators Short circuit Protection therefore capacitance normally at the load can be located at the Overtemperature Protection input to the Sine Amplitude Converter. Since the transformation ratio of the BCM48Bx120y300A00 is 1/4, the capacitance value can Provides enable/disable control, be reduced by a factor of 16x, resulting in savings of board area, internal temperature monitoring materials and total system cost. Can be paralleled to create multi-kW arrays The BCM48BF120y300A00 is provided in a VI Chip package compatible with standard pick-and-place and surface mount Typical Applications assembly processes. The co-molded VI Chip package provides enhanced thermal management due to a large thermal interface High-End Computing Systems area and superior thermal conductivity. The high conversion efficiency of the BCM48Bx120y300A00 increases overall Automated Test Equipment system efficiency and lowers operating costs compared to conventional approaches. High-Density Power Supplies Communications Systems Part Numbering Product Number Package Style (x) Product Grade (y) F = J-Lead T = 40 to 125C BCM48Bx120y300A00 T = Through hole M = 55 to 125C For Storage and Operating Temperatures see General Characteristics Typical Application PC enable / disable TM L switch BCM SW1 O Bus Converter F1 A +IN +OUT D V IN -IN -OUT BCM Bus Converter Rev 1.9 Page 1 of 21 01/2021BCM48Bx120y300A00 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 BCM Bus Converter Rev 1.9 Page 2 of 21 01/2021