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BA33JC5T Arkusz danych(PDF) 8 Page - Rohm |
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BA33JC5T Arkusz danych(HTML) 8 Page - Rohm |
8 / 16 page 8/13 BAxxJC5 Series(Fixed) BA00JC5WT(Variable) Datasheet TSZ02201-0R6R0A600140-1-2 © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 www.rohm.com 14.Feb.2012 Rev.001 ●I/O equivalence circuit ●Power Dissipation • TO220FP-3/TO220FP-5 The characteristics of the IC are greatly influenced by the operating temperature. If the temperature exceeds the maximum junction temperature Tjmax, deterioration or damage may occur. Implement proper thermal designs to ensure that power dissipation is within the permissible range in order to prevent instantaneous damage resulting from heat and maintain the reliability of the IC for long-term operation. The following method is used to calculate the power consumption Pc (W): Pc = (Vcc – Vo) × Io + Vcc × Icca Power dissipation Pd ≥ Pc The load current Io is calculated: Calculation Example: Vcc = 6.0V and Vo = 5.0V at Ta = 85℃ 31k Ω 2k Ω 27k Ω CTL Vcc R2 R1 Vcc OUT * For the BA00JC5WT, connect R1 and R2 externally between the ADJ and GND pins and between the OUT and ADJ pins. Equation: VO = Vc × (R1 + R2) / R1 (Vc = 1.25V (Typ.)) The recommended R1 value is approximately 30 k Ω to 150 kΩ. Fig.15 Fig.16 θja = 62.5°C/W → −16.0mW/°C 25°C = 2000mW → 85°C = 1040mW Vcc : Input voltage Vo : Output current IO : Load current Icca : Circuit current Io ≤ 860mA (Icca ≈ 30mA) Fig.17 0 15 25 20 10 5 25 50 75 125 150 100 0 AMBIENT TEMPERATURE:Ta [°C] (1)20.0 (2)2.0 (2) During IC without heat sink operation. θj-a = 62.5 (°C/W) (1) When using an infinite heat sink. θj-c = 6.25 (°C/W) Io ≤ Pd − Vcc × Icca Vcc − Vo 1.040 − 6.0 × Icca 6.0 − 5.0 Io ≤ |
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