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LM2662 数据表(PDF) 11 Page - Texas Instruments |
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LM2662 数据表(HTML) 11 Page - Texas Instruments |
11 / 19 page LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 CASCADING DEVICES Cascading the LM2662s (or LM2663s) is an easy way to produce a greater negative voltage (as shown in Figure 21). If n is the integer representing the number of devices cascaded, the unloaded output voltage Vout is ( −nVin). The effective output resistance is equal to the weighted sum of each individual device: (5) A three-stage cascade circuit shown in Figure 22 generates −3Vin, from Vin. Cascading is also possible when devices are operating in doubling mode. In Figure 23, two devices are cascaded to generate 3Vin. An example of using the circuit in Figure 22 or Figure 23 is generating +15V or −15V from a +5V input. Note that, the number of n is practically limited since the increasing of n significantly reduces the efficiency and increases the output resistance and output voltage ripple. Figure 21. Increasing Output Voltage by Cascading Devices Figure 22. Generating −3Vin from +Vin Figure 23. Generating +3Vin from +Vin Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM2662 LM2663 |
类似零件编号 - LM2662 |
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类似说明 - LM2662 |
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