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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ICE2B265 датащи(PDF) 15 Page - Infineon Technologies AG |
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ICE2B265 датащи(HTML) 15 Page - Infineon Technologies AG |
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15 / 36 page  Version 2.6 15 25 Dec 2006 CoolSET™-F2 Functional Description Figure 20 Internal Gate Rising Slope 3.8 Protection Unit (Auto Restart Mode) An overload, open loop and overvoltage detection is integrated within the Protection Unit. These three failure modes are latched by an Error-Latch. Additional thermal shutdown is latched by the Error-Latch. In case of those failure modes the Error-Latch is set after a blanking time of 5µs and the CoolMOS™ is shut down. That blanking prevents the Error-Latch from distortions caused by spikes during operation mode. 3.8.1 Overload / Open Loop with Normal Load Figure 21 shows the Auto Restart Mode in case of overload or open loop with normal load. The detection of open loop or overload is provided by the Comparator C3, C4 and the AND-gate G2 (see Figure 22). The detection is activated by C4 when the voltage at pin SoftS exceeds 5.3V. Till this time the IC operates in the Soft-Start Phase. After this phase the comparator C3 can set the Error-Latch in case of open loop or overload which leads the feedback voltage VFB to exceed the threshold of 4.8V. After latching VCC decreases till 8.5V and inactivates the IC. At this time the external Soft-Start capacitor is discharged by the internal transistor T1 due to Power Down Reset. When the IC is inactive VVCC increases till VCCon = 13.5V by charging the Capacitor CVCC by means of the Start-Up Resistor RStart-Up. Then the Error-Latch is reset by Power Up Reset and the external Soft-Start capacitor CSoft-Start is charged by the internal pull-up resistor RSoft-Start. During the Soft-Start Phase which ends when the voltage at pin SoftS exceeds 5.3V the detection of overload and open loop by C3 and G2 is inactive. In this way the Start Up Phase is not detected as an overload. Figure 21 Auto Restart Mode Figure 22 FB-Detection t V Gate 5V ca. t = 130ns Overload/ OpenLoopwithNormal Load FB t 4.8V 5.3V SoftS 5µs Blanking Failure Detection Soft-Start Phase VCC 13.5V 8.5V t Driver t T Restart T Burst1 t R Soft-Start 6.5V C Soft-Start C4 5.3V C3 4.8V G2 T1 Error-Latch Power Up Reset R FB 6.5V FB SoftS |
Аналогичный номер детали - ICE2B265 |
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Аналогичное описание - ICE2B265 |
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