Not Recommended for New Designs BCM48BH120T120A00 BCM48BH120M120A00 (Formerly VIB0101THJ) TM BCM S Bus Converter C NRTL US FEATURES DESCRIPTION TM The VI Chip Bus Converter is a high efficiency (>95%) Sine 48 Vdc 12 Vdc 120 W Bus Converter TM TM Amplitude Converter (SAC ) operating from a 38 to 55 Vdc High efficiency (>95%) reduces system power primary bus to deliver an isolated 12 V nominal, unregulated consumption secondary. The SAC offers a low AC impedance beyond the bandwidth of most downstream regulators, meaning that 3 High power density (801 W/in ) reduces power system input capacitance normally located at the input of a 12 V footprint by >50% regulator can be located at the input to the SAC. Since the Half Chip V I Chip package enables surface mount, K factor of the BCM48BH120T120A00 is 1/4, that capacitance value can be reduced by a factor of 16x, resulting in savings of low impedance interconnect to system board board area, materials and total system cost. Contains built-in protection features: undervoltage, The BCM48BH120T120A00 is provided in a VI Chip package overvoltage lockout, over current protection, short compatible with standard pick-and-place and surface mount circuit protection, overtemperature protection. assembly processes. The VI Chip package provides flexible Provides enable/disable control, internal temperature thermal management through its low junction-to-case and monitoring junction-to-board thermal resistance. With high conversion ZVS/ZCS Resonant Sine Amplitude Converter topology efficiency the BCM48BH120T120A00 increases overall system efficiency and lowers operating costs compared to Less than 50C temperature rise at full load in typical conventional approaches. applications TYPICAL APPLICATION V = 38 55 V P = 120 W IN OUT (NOM) High End Computing Systems V = 9.5 13.75 V (NO LOAD) K = 1/4 OUT Automated Test Equipment Telecom Base Stations PART NUMBER DESCRIPTION High Density Power Supplies BCM48BH120T120A00 -40C 125C T , J lead J Communication Systems TYPICAL APPLICATION POL enable / disable TM switch PC POL SW1 F1 BCM POL +In +Out 3.15 A V V C1 10 F OUT IN POL -In -Out Rev. 2.0 VI CHIP INC. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200 12/10 Page 1 of 16 vicorpower.com Not Recommended for New Designs PRELIMINARBCM48BH120T120A00 - BCM48BH120M120A00Y DATASHEET CONTROL PIN SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS See section 5.0 for further application details and guidelines. +IN to IN . -1.0 Vdc +60 Vdc PC to IN -0.3 Vdc +20 Vdc PC (V I Chip BCM Primary Control) TM to IN . -0.3 Vdc +7.0 Vdc The PC pin can enable and disable the BCM. When held below +IN/-IN to +OUT/-OUT . 2250 V (Hi Pot) V the BCM shall be disabled. When allowed to float with PC-DIS +IN/-IN to +OUT/-OUT 60 V (working) an impedance to IN of greater than 60 k the module will start. When connected to another BCM PC pin (either directly, +OUT to OUT -1.0 Vdc - +16 Vdc or isolated through a diode), the BCMs will start simultane- Temperature during reflow 245C (MSL 6) ously when enabled. The PC pin is capable of being either driven high by an external logic signal or internal pull up to 5 V PACKAGE ORDERING INFORMATION (operating). 4 3 2 1 TM (V I Chip BCM Temperature Monitor) A +In B The TM pin monitors the internal temperature of the BCM +Out C D within an accuracy of +5/-5 C. It has a room temperature NC E TM J F setpoint of ~3.0 V and an approximate gain of 10 mV/C. It G NC K H PC -Out can source up to 100 uA and may also be used as a Power L -In M Good flag to verify that the BCM is operating. Bottom View Signal Name Designation +In A1-B1, A2-B2 In L1-M1, L2-M2 NC E1 TM F2 NC G1 PC H2 +Out A3-D3, A4-D4 Out J3-M3, J4-M4 Rev. 2.0 VI CHIP INC. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200 12/10 Page 2 of 16 vicorpower.com