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本帖最后由 ikkyu 于 2020-6-2 15:53 编辑 , k& u2 B+ `' e0 b( x
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DESCRIPTION
0 G( V! ?6 r" eThe MP1584 is a high frequency step-down
3 g0 ?3 s8 @7 z2 o8 w1 eswitching regulator with an integrated internal
0 S1 ^( F; O5 S: N8 F6 Qhigh-side high voltage power MOSFET. It
( E; Q) o4 o! n: d5 ?; W) Iprovides 3A output with current mode control for
8 v# N4 N) H) ~fast loop response and easy compensation.
5 B- y* b- v8 R# |" BThe wide 4.5V to 28V input range accommodates * ~+ P1 ?" N) C5 v
a variety of step-down applications, including
6 A* `( u8 P, F7 uthose in an automotive input environment. A
1 X- b K. f `. N" d$ u- I100μA operational quiescent current allows use in 8 a& M* ?( r! x3 k
battery-powered applications. ! S) ~3 h$ ?) D
High power conversion ef
/ {6 {1 N2 A' E4 R: i6 p* p9 [ficiency over a wide
1 s/ o2 x' Y9 K- [load range is achieved by scaling down the & Q: @/ l: @& M2 @1 k& {% v* f4 u: }
switching frequency at light load condition to
% A4 C6 a9 K0 l6 V- h4 R, greduce the switching and gate driving losses. 0 O# ~7 {- o. w" X/ J- C1 c( B! `% d4 _3 }
The frequency foldback helps prevent inductor ! h' i, i+ ^' V! q1 f* g3 k
current runaway during startup and thermal
# i$ b2 y! @# A* d7 m+ Z4 e$ kshutdown provides reliable, fault tolerant
5 w0 ]( f; G ?1 I% |" T% yoperation. , ?3 ~( S; Z% Y- y
By switching at 1.5MHz, the MP1584 is able to 5 b9 C1 s3 }2 u$ s) u, R# ~; N* x
prevent EMI (Electromagnetic InteRFerence) noise
/ r& @# Y' d- t, o9 Hproblems, such as those found in AM radio and
, {3 o$ |; W) h; B' xADSL applications.
- x, H2 ]6 U* S5 u; v! }The MP1584 is available in a thermally enhanced
5 Q9 C, i# _4 U, SSOIC8E package.# W. N2 |( ?/ T$ J, j$ N
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* I; _' F# n( o6 |FEATURES3 Q9 q8 |/ u( H) V' k/ q, M: ?
; }. I1 R* W# d7 w: B) E
Wide 4.5V to 28V Operating Input Range 6 }/ c+ E5 F) `8 R4 p& e+ v
7 @9 F C' Q7 F! p+ ] Programmable Switching Frequency from 2 ?& N; @/ U' U6 S$ h. z
100kHz to 1.5MHz
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- t% F3 x5 j7 _+ C High-Efficiency Pulse Skipping Mode for
" m. s. Y) V" z x- m! p) E3 O0 LLight Load
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4 V# k0 n4 v% z$ P( S: ]' H- O6 R Ceramic Capacitor Stable
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0 M7 w6 m3 S9 K) @' q Internal Soft-Start 4 t% _: e. }" }
, E y8 b* P7 W1 i1 i+ U Internally Set Current Limit without a
, J+ ~* ~9 A4 M4 ^! k7 w. iCurrent Sensing Resistor
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Available in SOIC8E Package.
6 [8 P6 X, G5 vAPPLICATIONS + s9 X; \. W' _8 a$ w% \* @7 s
+ Y( _. H( n' h# {) e High Voltage Power Conversion - W7 g! H) S+ f9 m- G! p
" h: O( Q5 X5 z9 p; F5 t1 p$ }, ]- \ Automotive Systems % O" T9 ^* b# O, s7 J6 n
L' f, @8 ~/ F0 [; A, d3 D& s. t
Industrial Power Systems , @3 \0 w# S! R
# M. W* J5 o+ g* X h+ x
Distributed Power Systems $ y! g9 t3 b$ n" l) z; G
4 x2 n7 A6 Z8 a. }- kBattery Powered Systems 2 t+ @+ e. p: p/ O" Z' \7 k$ o ^, Y+ ~
Tel：15820760660 熊R
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发表于 2020-6-2 15:51
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