作者: 超級狗 时间: 2013-8-21 23:51 本帖最后由 超級狗 于 2013-8-22 08:26 编辑 9 M) v, f+ d; p$ h! ` $ W. C; L/ ]4 U. O {; jIntersil ICL7660A 上面講的︰ : t8 t% T' z5 o6 g9 t( n/ C - n1 V- y, D. n! F1 BDo’s And Don’ts 4 V8 A- g3 @9 P8 R) x, D
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 O5 N" r- o; x
6 g& h* `0 D4 m; x ! R" c$ w0 F8 {7 A4 R- V試試看吧！ - P# A" Z$ b2 M. k+ x 6 ~1 `. ]( e) n; d9 U# C+ M( uHT7660 % ]9 d0 ^7 K% [9 ~LV Pin︰, f# c4 M/ b7 P
Floating this pin enables the voltage regulator. Connect this pin to VSS (Ground) to bypass voltage regulator and improve low voltage operation. : q9 A. C: n% [: m* r5 A8 A) m4 S" }1 ~& C
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