$ m3 {. v- f1 f' h1 s9 z- w6 H) ^Intersil ICL7660A 上面講的︰ 1 v! _0 {5 F1 S: {) @/ ~9 N* _ t + Q; z# b4 S: [9 M9 z6 sDo’s And Don’ts 3 a* c' ?# B% c! r, I% Z
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). 5 T3 J3 I- e- H! f5 S8 s
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" ?" q4 Z( N1 M I7 u試試看吧！ 4 j# B6 n2 N; S* d$ i) L1 y- i1 w9 @2 Y HT7660 B4 N! B6 c/ \- C4 h2 A! g& rLV Pin︰ + t+ Q% J- z1 r/ ?$ N# yFloating this pin enables the voltage regulator. Connect this pin to VSS (Ground) to bypass voltage regulator and improve low voltage operation./ u; O- `5 H/ d$ ^7 l4 p. s0 n
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