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STK5C4U332J-E 数据表(PDF) 10 Page - ON Semiconductor |
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STK5C4U332J-E 数据表(HTML) 10 Page - ON Semiconductor |
10 / 14 page STK5C4U332J-E www.onsemi.com 10 Fault output The FAULT output is an open drain output requiring a pull-up resistor. If the pull-up voltage is 5 V, use a pull-up resistor with a value of 6.8 kΩ or higher. If the pull-up voltage is 15 V, use a pull-up resistor with a value of 20 kΩ or higher. The FAULT output is triggered if there is a VDD undervoltage or an overcurrent condition. Undervoltage lockout protection If VDD goes below the VDD supply undervoltage lockout falling threshold, the FAULT output is switched on. The FAULT output stays on until VDD rises above the VDD supply undervoltage lockout rising threshold. After VDD has risen above the threshold to enable normal operation, the driver waits to receive an input signal on the LIN input before enabling the driver for the HIN signal. Overcurrent protection An over-current condition is detected if the voltage on the ITRIP pin is larger than the reference voltage. There is a blanking time of typically 350 ns to improve noise immunity. After a shutdown propagation delay of typically 0.55 s, the FAULT output is switched on. The FAULT output is held on for a time determined by the resistor and capacitor connected to the RCIN pin. If RCIN pin is unconnected, the internal RC components set fault clear time to 2 ms (typical). The over-current protection threshold should be set to be equal or lower to 2 times the module rated current (IO). An additional fuse is recommended to protect against system level or abnormal over-current fault conditions. Capacitors on High Voltage and VDD supplies Both the high voltage and VDD supplies require an electrolytic capacitor and an additional high frequency capacitor. Enable pin The ENABLE terminal pin is used to enable or shut down the built-in driver. If the voltage on the ENABLE pin rises above the ENABLE ON-state voltage, the output drivers are enabled. If the voltage on the ENABLE pin falls below the ENABLE OFF-state voltage, the drivers are disabled. Minimum input pulse width When input pulse width is less than 1 μs, an output may not react to the pulse. (Both ON signal and OFF signal) Calculation of bootstrap capacitor value The bootstrap capacitor value CB is calculated using the following approach. The following parameters influence the choice of bootstrap capacitor: VBS: Bootstrap power supply. 15 V is recommended. QG: Total gate charge of IGBT at VBS = 15 V. 34 nC UVLO: Falling threshold for UVLO. Specified as 12 V. IDMAX: High side drive consumption current. Specified as 0.4 mA tONMAX: Maximum ON pulse width of high side IGBT. Capacitance calculation formula: CB = (QG + IDMAX * tONMAX) / (VBS - UVLO) CB is recommended to be approximately 3 times the value calculated above. The recommended value of CB is in the range of 1 to 47 μF, however, the value needs to be verified prior to production. When not using the bootstrap circuit, each high side driver power supply requires an external independent power supply. The internal bootstrap circuit uses a MOSFET. The turn on time of this MOSFET is synchronized with the turn on of the low side IGBT. The bootstrap capacitor is charged by turning on the low side IGBT. If the low side IGBT is held on for a long period of time (more than one second for example), the bootstrap voltage on the high side MOSFET will slowly discharge. Figure 13: Bootstrap capacitance versus tONMAX 0.01 0.1 1 10 100 0.1 1 10 100 1000 tONMAX [ms] |
类似零件编号 - STK5C4U332J-E |
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类似说明 - STK5C4U332J-E |
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