TA的每日心情 | 开心
2022-5-9 15:00 |
|---|
签到天数: 28 天 [LV.4]偶尔看看III
|
EDA365欢迎您登录！
您需要 登录 才可以下载或查看，没有帐号？注册
x
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
|
|
/1 
发表于 2021-12-30 17:57
收藏
淘帖
支持！
反对！