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本帖最后由 超級狗 于 2013-8-22 08:26 编辑 1 ], w% e. [8 u7 O7 G6 t2 W
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Intersil ICL7660A 上面講的︰
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Do’s And Don’ts
! A, H) s- P3 Z; r B1 {- 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).2 v0 F1 `6 `7 ?0 E. j- E& v2 V
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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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支持！
反对！
发表于 2013-8-21 23:51
