100V 输入同步降压最大5A输出电流 ZCC1005

四维电子

" x: S- d& V2 H* Q  K! _0 w' GFeatures
 9V to 100V input voltage range
 1.5A/5A continuous output current
 95% Peak Efficiency
7 P6 i$ k  \/ o, O+ C/ s" [% {0 Z 400μA operating quiescent current
 100V 400-mΩ high-side MOSFET
8 _8 A: r* o# o7 ~" C Peak Current mode control
& f( ^! _0 l7 y) `/ p 150 kHz Fixed Frequency
5 }- z& }' a0 p2 z0 F  r& l Internal compensation for ease of use
  U' |- U) Y! L. p Up to 92% duty cycle
 0.8V voltage reference
: Z3 z8 Z4 i$ x6 ^' S- q 1μA shutdown current
 3A/6A cycle-by-cycle current limit
" D" z# }! C7 _ 150ms Hiccup mode short circuit protection
. L/ d* k* Q* {: }7 Z6 x  ZFunction
9 ]; g4 E5 Q4 D Thermal shutdown Function
 ESOP-8 package
Applications
- |4 Q& o, I1 i. X5 T$ H4 M, e Charger in vehicle
8 z! w, s9 ~. E& u; T" i* I! @) y) t Battery Chargers
' u6 g5 L9 G$ m Power adapter
# O' Y- p( H; n" ^, R8 P0 _Typical Application
- D  M( g$ ?* c- ~2 MDescription
The ZCC1005 is a high voltage, non-synchronous
step-down converter operates over a wide range
- d6 i3 @3 @" s: [* q7 Xinput voltage
9V to 100V. The ZCC1005
, t4 H! h8 f- M* G7 A4 F( |integrates a 100-V 400-mΩ high-side MOSFET.
& v( L  {1 G# @$ x5 Q4 |! J3 \0 Z7 pThe ZCC1005 delivers 1.5A continuous load
& L$ q  y8 M/ v5 V; ccurrent with up to 95% efficiency. The ZCC1005
9 C. V8 X+ M" a' ]operates with fixed frequency peak current control
with built-in compensation eliminates the need for
external components.
Cycle-by-cycle current limit in high-side MOSFET
. X8 H$ B+ ]7 E! xprotects the converter in an overload condition.
Hiccup mode protection is triggered if the
over-current condition has persisted for longer than
the present time.
The ZCC1005 exhibits protection features that
protect the load from faults like under-voltage,
over-current and over-temperature.
The ZCC1005 is available in an ESOP-8 package.
& \- v  j% y# m7 n+ E  O0 |# v

dragongfly

同步降压
优点：效率高：mos管的内阻非常小，导通压降远比肖特基二极管的正向大同压降小很多。
缺点：稳定性不足：需要设计驱动电路，避免上下管同时导通的情况，电路较为复杂，导致稳定性不足