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BU39UA3WNVX-TL 数据表(PDF) 9 Page - Rohm |
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BU39UA3WNVX-TL 数据表(HTML) 9 Page - Rohm |
9 / 14 page www.rohm.com © 2013 ROHM Co., Ltd. All rights reserved. TSZ02201-0RBR0A300040-1-2 TSZ22111・15・001 9/11 21.MAR.2013.Rev.003 BUxxUA3WNVX series Datasheet About power dissipation (Pd) As for power dissipation, an approximate estimate of the heat reduction characteristics and internal power consumption of IC are shown, so please use these for reference. Since power dissipation changes substantially depending on the implementation conditions (board size, board thickness, metal wiring rate, number of layers and through holes, etc.), it is recommended to measure Pd on a set board. Exceeding the power dissipation of IC may lead to deterioration of the original IC performance, such as causing operation of the thermal shutdown circuit or reduction in current capability. Therefore, be sure to prepare sufficient margin within power dissipation for usage. Calculation of the maximum internal power consumption of IC (PMAX) PMAX=(VIN-VOUT)×IOUT(MAX.) (VIN: Input voltage VOUT: Output voltage IOUT(MAX): Maximum output current) Measurement conditions Standard ROHM Board Evaluation Board 1 Layout of Board for Measurement IC Implementation Position Top Layer (Top View) Top Layer (Top View) Bottom Layer (Top View) Bottom Layer (Top View) Measurement State With board implemented (Wind speed 0 m/s) With board implemented (Wind speed 0 m/s) Board Material Glass epoxy resin (Double-side board) Glass epoxy resin (Double-side board) Board Size 70 mm x 70 mm x 1.6 mm 40 mm x 40 mm x 1.6 mm Wiring Rate Top layer Metal (GND) wiring rate: Approx. 0% Metal (GND) wiring rate: Approx. 50% Bottom layer Metal (GND) wiring rate: Approx. 50% Metal (GND) wiring rate: Approx. 50% Through Hole Diameter 0.5mm x 6 holes Diameter 0.5mm x 25 holes Power Dissipation 0.56W 0.39W Thermal Resistance θja=178.6°C/W θja=256.4°C/W * Please design the margin so that PMAX becomes is than Pd (PMAX <Pd) within the usage temperature range Fig. 23 SSON004X1010 Power dissipation heat reduction characteristics (Reference) 0 0.1 0.2 0.3 0.4 0.5 0.6 0 25 50 75 100 125 Ta [ ℃] 0.56W 85 0.39W |
类似零件编号 - BU39UA3WNVX-TL |
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类似说明 - BU39UA3WNVX-TL |
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