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本帖最后由 超級狗 于 2013-8-22 08:26 编辑 0 P" V! M6 x$ T1 Y) H8 A0 |3 C( o
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Intersil ICL7660A 上面講的︰
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Do’s And Don’ts
' ^! O5 [% ~: f% a- Do not exceed maximum supply voltages.
- Do not connect LV terminal to GROUND for supply voltages greater than 3.5V.
- Do not short circuit the output to V+ supply for supply voltages above 5.5V for extended periods, however, transient conditions including start-up are okay.
- When using polarized capacitors, the + terminal of C1 must be connected to pin 2 of the ICL7660 and CL7660A and the + terminal of C2 must be connected to GROUND.
- If the voltage supply driving the ICL7660 and ICL7660A has a large source impedance (25Ω - 30Ω), then a 2.2μF capacitor from pin 8 to ground may be required to limit rate of rise of input voltage to less than 2V/μs.
- User should insure that the output (pin 5) does not go more positive than GND (pin 3). Device latch up will occur under these conditions. A 1N914 or similar diode placed in parallel with C2 will prevent the device from latching up under these conditions. (Anode pin 5, Cathode pin 3).1 K _% C1 z3 a% D- J. k1 ^
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試試看吧！# _: K5 J! L6 Q5 o5 M
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HT7660
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Floating this pin enables the voltage regulator. Connect this pin to VSS (Ground) to bypass voltage regulator and improve low voltage operation.
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发表于 2013-8-21 14:18
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反对！
发表于 2013-8-21 23:51
