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STK541UC60C-E 数据表(PDF) 11 Page - ON Semiconductor |
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STK541UC60C-E 数据表(HTML) 11 Page - ON Semiconductor |
11 / 13 page STK541UC60C-E www.onsemi.com 11 CB capacitor value calculation for bootstrap circuit Calculate conditions Capacitance calculation formula Thus, the following formula are true VBS x CB - QG - IDMAX * TONMAX = UVLO * CB therefore, CB = (QG + IDMAX * TONMAX) / (VBS - UVLO) The relationship between TONMAX and CB becomes as follows. CB is recommended to be approximately 3 times the value calculated above. The recommended value of CB is in the range of 1 to 47μF, however, this value needs to be verified prior to production. Fig. 11 Tonmax - CB characteristic Parameter Symbol Value Unit Upper side power supply. VBS 15 V Total gate charge of output power IGBT at 15V. QG 89 nC Upper limit power supply low voltage protection. UVLO 12 V Upper side power dissipation. IDMAX 400 μA ON time required for CB voltage to fall from 15V to UVLO TONMAX - s 0.01 0.1 1 10 100 0.1 1 10 100 1000 Tonmax [ms] CB vs Tonmax |
类似零件编号 - STK541UC60C-E |
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类似说明 - STK541UC60C-E |
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