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AN82527

AN82527资料
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File Size : 116 KB Manufacturer:INTEL Description:All formulas are simplified. Refer to the last paragraph of this subsection about the actual output voltage. The following sequence describes the basic operation of the tripler by showing how the voltage at the 2 and 3 nodes, V2 and V3, increases. Q2 turns on, completing the ground path to charge C1 (and the 2 node) to the supply voltage, less a diode voltage drop. V2 (charging) = VIN C VD1 After Q2 turns off, Q1 turns on. The Q1-Q2 side of C1 is switched (offset upward) from ground to VIN. The 2 node, that was nominally at the supply voltage, becomes nominally twice the supply voltage. V2 = VIN C VD1 + VIN While Q1 is on, Q4 is also on. When Q4 is on, the nominally doubled voltage at the 2 node is applied across C2, through D2. V3 (charging) = VIN C VD1 + VIN C VD2 After Q4 turns off, Q3 turns on. The Q3-Q4 side of C2 is switched from ground to VIN. The 3 node, that was nomi- nally twice the supply voltage, becomes nominally three times the supply voltage. V3 = VIN C VD1 + VIN C VD2 + VIN The tripled voltage is available at the output through D3. VOUT = VIN C VD1 + VIN C VD2 + VIN C VD3 The output is nominally 3 times the supply voltage less the voltage drop across three diodes. The actual output is lower. These simplified formulas do not show that the voltage across the capacitors decreases when charge flows to the following stage or output. An actual device also has some internal loss. ESD Protection Zener diodes are provided at IN, EN, and OUT to limit ESD voltage.


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	1PCS	100PCS	1K	10K
价格


型号：AN82527 厂家：INTEL 封装：PLCC44 批号：数量：1600 说明：PLCC44


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