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BD33KA5WF-E2 Folha de dados(PDF) 10 Page - Rohm |
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BD33KA5WF-E2 Folha de dados(HTML) 10 Page - Rohm |
10 / 18 page Datasheet 10/15 BDxxKA5 Series BDxxKA5W Series BD00KA5W Series TSZ02201-0R6R0A600150-1-2 © 2012 ROHM Co., Ltd. All rights reserved. www.rohm.com TSZ22111・15・001 26.Jun.2012 Rev.001 The calculation method for power consumption Pc(W) is as follows : Pc = (Vcc-Vo)×Io+Vcc×Icca Acceptable loss Pd≧Pc Solving for the load current IO in order to operate within the acceptable loss, Io≦ It is then possible to find the maximum load current IoMAX with respect to the applied voltage Vcc at the time of thermal design. Calculation Example Example 1) When Ta=85℃, Vcc=2.5V, Vo=1.0V Io≦ θja=96.2℃/W → -10.4mW/℃ Io≦440mA (Icca : 6mA) 25℃=1300mW → 85℃=676mW Please refer to the above information and keep thermal designs within the scope of acceptable loss for all operating temperature ranges. The power consumption Pc of the IC when there is a short circuit (short between Vo and GND) is : Pc=Vcc×(Icca+Ishort) *Ishort : Short circuit current ●Terminal Vicinity Settings and Cautions ・Vcc Terminal Please attach a capacitor (greater than 1 μF) between Vcc and GND. The capacitance values differ depending on the application, so chose a capacitor with sufficient margin and verify the operation on actual board. ・GND Terminal Please be sure to keep the set ground and IC ground at the same potential level so that a potential difference does not arise between them. If a potential difference arises between the set ground and the IC ground, the preset voltage will not be output properly, causing the system to become unstable. Please reduce the impedance by making the ground patterns as wide as possible and reducing the distance between the set ground and the IC ground as much as possible. ・CTL Terminal The CTL terminal is turned ON at 2.0V and higher, and OFF at 0.8V and lower, within the operating power supply voltage range. The power supply and the CTL terminal may be started up and shut down in any order without problems. Pc – Vcc×Icca Vcc-Vo 0.676-2.5×Icca 2.5-1.0 BA10KA5WFP(TO252-5 packaging) Fig.23 Input equivalent circuit Vcc: Vo: Io: Icca: Input voltage Output voltage Load current Circuit current CTL 25k Ω 31.25k Ω |
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Descrição semelhante - BD33KA5WF-E2 |
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