|
|
本帖最后由 超級狗 于 2013-8-22 08:26 编辑
! R2 K: e* m. l) T( q5 X" S7 D. H3 e1 ?$ g6 g r
Intersil ICL7660A 上面講的︰
5 E, [8 s3 k' {% g8 W7 u R! e! ~% |2 a" X" {) t
Do’s And Don’ts$ |' s5 }3 t# M4 @2 h4 ^
- 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).
7 n* e7 `1 V8 \* j( K6 p% q# G
9 V* Z% R7 e! a8 s! k
) |" i7 T! w- Q, q6 M/ I& M1 @試試看吧！9 h7 X0 d$ O3 U% e& m5 Z5 i
& P6 Z# H( L! n& v5 H
HT7660. m! c2 N8 ]% \; ?! h* B( V! a T
LV Pin︰
: X+ o4 c0 e: b1 w: ~7 mFloating this pin enables the voltage regulator. Connect this pin to VSS (Ground) to bypass voltage regulator and improve low voltage operation.
" H# o2 c/ d# B2 R4 Y% f
5 @$ e. W. L2 h# E{:soso_e103:} |
|
/1 
发表于 2013-8-21 14:18
QQ好友和群
QQ空间
腾讯微博
腾讯朋友
微信
收藏
支持！
反对！
发表于 2013-8-21 23:51
