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STK5U4UFE0D-E 数据表(PDF) 9 Page - ON Semiconductor |
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STK5U4UFE0D-E 数据表(HTML) 9 Page - ON Semiconductor |
9 / 14 page STK5U4UFE0D-E www.onsemi.com 9 Undervoltage lockout protection (UVP) If VD goes below the VD supply undervoltage negative going input threshold, the IGBT gate drives will be turned off. If VD rises above the positive going input threshold, the IGBT gate drivers will return to normal operation. The Fox signal outputs stay low during the UVP state. The UVP does not depend on input signal voltage. Desaturation Protection function (DESATP) The Desaturation Protection function (DESATP) is implemented by comparing the voltage between the collector and the emitter of IGBT with an internal reference of 6.5 V (typ). If a short circuit occurs after the IGBT is turned on and saturated, there will be a delay while the blanking capacitor is charged from the VCE(sat) level of the IGBT to the trip voltage of the comparator. If the collector voltage exceeds the trip level, a DESATP fault is triggered and the Fox signal (FoU, FoV, FoW, FoN) is set HIGH. The fault condition is cleared after the input signal is set to inactive (HIGH due to negative logic on input). Additional protection against abnormal current levels such as a protection circuit using external shunt resistors, and a fuse on the input voltage line is strongly recommended. Capacitors on High Voltage and VD supplies Both the high voltage and VD supplies require an electrolytic capacitor and an additional high frequency capacitor. Disconnection of U, V and W terminals Disconnection of terminals U, V, or W during normal motor operation will cause damage to IPM, use caution with this connection. Minimum input pulse width When input pulse width is less than 1 μs, an output may not react to the pulse. (Both ON and OFF signal) Layout The traces between the IPM terminals and each optocoupler must be as short as possible, and the stray capacitance between the primary and the secondary must be considered in order to select a layout pattern. It is essential that trace length between terminals in the snubber circuit be kept as short as possible to reduce the effect of surge voltages. Recommended value of “CS” is in the range of 0.1 to 10 μF. This capacitor should be a high frequency capacitor. Thermistor Inside the IPM, a thermistor used as the temperature monitor for internal substrate is connected between “TH1” and “TH2”. The variation of thermistor resistance with temperature is shown in this datasheet. Dimensioning of bootstrap capacitor The module includes an internal bootstrap circuit requiring one bootstrap capacitor for each phase, each with a value CB. The recommended value of CB is in the range of 1 to 47 μF, however, this value needs to be verified prior to production. When not using the bootstrap circuit, each high side driver power supply requires an external independent floating power supply. If the selected capacitance is more than 47 μF (±20%), connect a resistor (about 40 Ω) in series between each three-phase upper side power supply terminals (VDU, VDV, VDW) and each bootstrap capacitor. When not using the bootstrap circuit, each upper side gate driver power supply requires an external independent floating power supply. Also we recommend adopting safety measures such as using Zener diodes for surge absorption or low impedance capacitors around each power supply terminal to suppress voltage transients. CB value calculation for bootstrap circuit Calculate condition Item Symbol Value Unit High-side power supply. VD1,2,3 15 V Total gate charge of output power IGBT at 15 V. Qg 311 nC High-side power supply undervoltage protection. UDUVP- 12 V High-side power dissipation. ID max 17 mA ON time required for CB voltage to fall from 15 V to UVP Ton-max - s Capacitance calculation formula CB must not be discharged below to the upper limit of the UVP - the maximum allowable on-time (Ton-max) of the upper side is calculated as follows: VD1, 2, 3 * CB – Qg – ID max * Ton-max = UVP * CB CB = (Qg + ID max * Ton-max) / (VD1, 2, 3 – UVP) 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. Figure 6. Bootstrap selection as a function of maximum ON time 0.01 0.1 1 10 100 0.01 0.1 1 10 Ton-max [ms] CB vs. Ton-max |
类似零件编号 - STK5U4UFE0D-E |
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类似说明 - STK5U4UFE0D-E |
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