100V 输入同步降压最大5A输出电流 ZCC1005

四维电子

8 m2 [) h% k/ x% r" J' L4 E# k- @Features
4 U# U: Z0 J7 d( X" G# E! k 9V to 100V input voltage range
 1.5A/5A continuous output current
+ U  e/ \- ~" C, x- t! S: \' N5 a 95% Peak Efficiency
 400μA operating quiescent current
; X; \, ^5 H( ?" b/ ] 100V 400-mΩ high-side MOSFET
, }6 o7 R7 n6 L4 N' n Peak Current mode control
 150 kHz Fixed Frequency
5 X* ?# R+ M2 P" C3 f Internal compensation for ease of use
 Up to 92% duty cycle
 0.8V voltage reference
 1μA shutdown current
 3A/6A cycle-by-cycle current limit
  L; B2 A% e+ p' l; V, a7 j 150ms Hiccup mode short circuit protection
Function
9 k/ H3 [% Q# \( |- I% l( Z Thermal shutdown Function
 ESOP-8 package
5 b" U3 j* X7 \7 S& T" e& RApplications
 Charger in vehicle
) o5 x& r9 f0 C$ p Battery Chargers
 Power adapter
Typical Application
Description
The ZCC1005 is a high voltage, non-synchronous
step-down converter operates over a wide range
) [4 A+ \( V7 f0 {" yinput voltage
4 R5 G# B% J1 H9 T% w9V to 100V. The ZCC1005
: d" K  ], F5 o  u! [, y/ t9 `) Rintegrates a 100-V 400-mΩ high-side MOSFET.
The ZCC1005 delivers 1.5A continuous load
current with up to 95% efficiency. The ZCC1005
operates with fixed frequency peak current control
with built-in compensation eliminates the need for
/ H. q9 C5 j3 @external components.
3 q6 R/ a5 b; d) L$ p  f+ W+ {Cycle-by-cycle current limit in high-side MOSFET
protects the converter in an overload condition.
0 u; r+ H7 h5 s' SHiccup mode protection is triggered if the
over-current condition has persisted for longer than
4 k$ N0 e( w# u; k( ?the present time.
The ZCC1005 exhibits protection features that
  v+ a1 j; P+ y/ F) xprotect the load from faults like under-voltage,
! H  u6 y7 b$ [' m6 Q5 c! Vover-current and over-temperature.
The ZCC1005 is available in an ESOP-8 package.

dragongfly

同步降压
+ [/ E+ D$ `# S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。
6 w5 q3 g* e9 u; ]7 p: n0 g: O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