有人用过HT7660吗

woaiwojia

有用过HT7660的吗，我要用正5V的电压产生一个正负5V的方波，接了个HT7660产生负电压，可一接上负载，-5V的电压就上升到0V了，振荡电路电流最大才10MA，是不是我电路接错了。请哪位高人指点一下。

超級狗

Intersil ICL7660A 上面講的︰

' {7 s! V5 ?7 G7 zDo’s And Don’ts
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• 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).
  

試試看吧！

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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