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| GBPC3502A资料 | |
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GBPC3502A PDF Download |
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File Size : 116 KB
Manufacturer:VISHAY IR Description:Figure 2 implements both the current-limit capability and a control scheme for dealing with shorted outputs. The 2.3mΩ resistor RS provides for current limiting at about 15A. The current-limit threshold voltage of the MIC5158 is about 0.035V, and 0.035V/15A = 2.3mV. See Application Hint 25 for information on building such resistors using circuit board copper. Since a shorted output may be momentary, the circuitry built around U1 automatically restarts the regulator when a short is removed. Existence of a shorted output is continually monitored; the system will protect the pass device for an indefinite time. When a short exists the regulator is enabled for a very brief interval and disabled for a much longer interval; power dissipation is reduced by this duty cycle, which can be arbitrarily designed. Circuit Description Schmitt-trigger NAND gate A is used to control a gated oscillator (gate B). Resistors R5 and R6, diode D3, and capacitor C5 provide oscillator timing. With the values shown the enable time is about 110µs approximately every 2.25ms. This provides a healthy 1:20 on/off ratio (5% duty cycle) for reducing power dissipated by the pass device. Diode D2 keeps C5 discharged until gate A enables the oscillator. This assures that oscillation will begin with a full-width short enable pulse. Different enable and/or disable time(s) may be |
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| 1PCS | 100PCS | 1K | 10K | ||
| 价 格 | |||||
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型 号：GBPC3502A 厂 家：VISHAY IR 封 装： 批 号：07+ 数 量：8262 说 明：原装正品 |
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运 费：所有运费均有我司承担 所在地：深圳 新旧程度： |
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| 联系人：申小姐 |
| 电 话：0755-83330991,0755-83047629 |
| 手 机：15811820920 |
| QQ：2355514181 |
| MSN：chipstech-int@hotmail.com |
| 传 真：0755-61658118 |
| EMail：sales@chipstech-int.com |
| 公司地址： 深圳市福田区中航路鼎城国际1017 |
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1. 所有我司提供的货物，均为原厂原装正品！ 2. 我们的报价是不含税价格。含税需要增加相应的税点。
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