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ZCC2139替代ME2139

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    2022-5-9 15:00
  • 签到天数: 28 天

    [LV.4]偶尔看看III

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    发表于 2021-12-30 17:57 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式

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    Description; t& r' {4 Z% m+ P# F! n& b
    The Z CC2139 series is a CMOS step-up
    - e) E- F7 u; ~" Q9 o) Sswitching regulator which mainly consists of a 4 L1 q1 [: V5 B
    reference voltage source, an oscillation circuit, / Z6 y/ @* D  N; h. b
    an error amplifier, a phase compensation circuit,
    . W  x; i2 Y4 n" h) Ba PWM/PFM switching control circuit. With an
    - S, c2 ?/ G/ Z* y3 T5 K, uexternal low-ON-resistance Nch Power MOS,
    2 l7 f; R6 Y! X: n6 Mthis product is applicable to applications
      y( g3 x4 D6 \* h7 \requiring high efficiency and high output current.
    ' F0 _( M$ d9 Y7 g1 M+ M( iThe Z CC 2139 series switches its operation to the
    4 w7 C0 q" Y/ ~% X2 Q  ZPFM control circuit whose duty ratio is 15 % with
    . j$ J: A( k& [& c3 u4 ~7 \- }to the PWM/PFM switching control circuit under   Q: Y# X9 V8 R. V. O. N
    a light load and to prevent decline in the 1 t4 W1 K" X' X0 G5 m( c0 G2 A
    efficiency by IC operation current.
    . x5 z$ W, B, k7 YFeature
    . v- @4 \) w( h' q9 }" w, a  h Low voltage operation: Start-up is guaranteed
    5 Y% Q/ D3 ], G$ J+ u/ C0 G. ?8 Zfrom 0.9 V(IOUT =1 mA )& Y; v- f% d2 r2 [
     Duty ratio: Built-in PWM/PFM switching control
    5 ?$ h9 a* A& S2 D- w0 Q% Qcircuit 15 to 78 % . ) m" ^: R. a& G3 J. @1 X
     oscillator frequency:1.0MHz2 W- w; T0 u0 u* D: y
     External parts: coil, diode, capacitor, and
    8 R& `! K! e& h/ h# b% }/ t: [! q  Ktransistor* F7 ~5 j! a1 d$ M) M% \/ i
     Output voltage range: 1.5V ~6.5 V
    6 ~  |7 n/ R6 @ Output voltage accuracy:±2% 7 H& i. a" E* e: S% k
     Soft start function: 2 mS.
    ; g9 i5 G) f1 D& ~9 Q0 b& w PACKAGE:SOT23-52 _- }. m/ A- R7 x
    9 _  w/ W% J3 ]8 p
    . I& }4 V8 r$ P& b, f' V5 L
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