100V 输入同步降压最大5A输出电流 ZCC1005

四维电子

Features
; u, Q- O, I& r9 c2 x  I7 [: S 9V to 100V input voltage range
, p7 g9 ]& H: ?4 }# O" I9 g1 h 1.5A/5A continuous output current
 95% Peak Efficiency
 400μA operating quiescent current
 100V 400-mΩ high-side MOSFET
# y7 X& j6 ^$ Q8 [ Peak Current mode control
6 B4 n# n# `* l' j( u( Q3 y 150 kHz Fixed Frequency
 Internal compensation for ease of use
7 l2 Q7 p% K  W/ J- z' \ Up to 92% duty cycle
( p  k2 X; z& B 0.8V voltage reference
5 G1 x' P& T# x- q# j 1μA shutdown current
& c) \4 A6 r1 b0 J) F& r3 I0 Y 3A/6A cycle-by-cycle current limit
  n( T+ s) h" e! ]+ q: u3 b 150ms Hiccup mode short circuit protection
Function
 Thermal shutdown Function
 ESOP-8 package
1 H5 M$ N# c3 @/ q5 h2 s# B" c8 jApplications
 Charger in vehicle
 Battery Chargers
 Power adapter
, S: `: P3 T6 [# u0 d0 dTypical Application
8 \" V2 ]) }- o' I, \Description
- L% b% Z, O3 f8 r, n4 ]The ZCC1005 is a high voltage, non-synchronous
* J- {+ r0 {8 y  U8 Y+ \step-down converter operates over a wide range
input voltage
9V to 100V. The ZCC1005
integrates a 100-V 400-mΩ high-side MOSFET.
2 \( Y# n5 A4 I$ ZThe ZCC1005 delivers 1.5A continuous load
+ R" O9 k) ?$ E6 v& T  Xcurrent with up to 95% efficiency. The ZCC1005
operates with fixed frequency peak current control
! `( [/ F& p4 ]1 n% _- [with built-in compensation eliminates the need for
7 @  K3 p6 G8 `. h- [" Xexternal components.
Cycle-by-cycle current limit in high-side MOSFET
; \' j) Q& d: ~6 A6 zprotects the converter in an overload condition.
Hiccup mode protection is triggered if the
over-current condition has persisted for longer than
the present time.
1 ~# y. E. }6 w! ?" EThe ZCC1005 exhibits protection features that
  ~+ F- g5 c: x. g1 X# G: J- lprotect the load from faults like under-voltage,
over-current and over-temperature.
The ZCC1005 is available in an ESOP-8 package.
' h" S; f& l. u7 [9 m7 ^7 h

dragongfly

同步降压
3 P: w, I* _3 U8 ]' U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。
. R* l8 H. V7 t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