100V 输入同步降压最大5A输出电流 ZCC1005

四维电子

0 z% M7 \% X5 b% |" o/ W7 A( t3 u
Features
 9V to 100V input voltage range
1 S( W% t1 S9 Y/ C$ m/ N6 p 1.5A/5A continuous output current
) X) j$ o; Z% O6 f9 D# B$ s 95% Peak Efficiency
 400μA operating quiescent current
 100V 400-mΩ high-side MOSFET
 Peak Current mode control
* g# W. t# a6 g/ _5 j, O4 l 150 kHz Fixed Frequency
4 p- {: {$ g% m* J+ D Internal compensation for ease of use
 Up to 92% duty cycle
, C$ o3 w" |4 Q3 C$ }, g 0.8V voltage reference
2 d* d' ~. Z3 {9 Z. V 1μA shutdown current
 3A/6A cycle-by-cycle current limit
 150ms Hiccup mode short circuit protection
- X+ Q$ d  A, O, uFunction
7 [2 Z8 u0 _4 @- [6 ~ Thermal shutdown Function
 ESOP-8 package
Applications
 Charger in vehicle
 Battery Chargers
 Power adapter
Typical Application
Description
, r+ J$ R' I: g. g+ x, n( g$ EThe ZCC1005 is a high voltage, non-synchronous
1 C9 V/ `  e) o* n8 {step-down converter operates over a wide range
input voltage
+ @/ G6 z# ~2 _9V to 100V. The ZCC1005
integrates a 100-V 400-mΩ high-side MOSFET.
- [$ |5 E" y, D! }, o  _The ZCC1005 delivers 1.5A continuous load
current with up to 95% efficiency. The ZCC1005
$ g7 f4 B( j" R/ b" z, i0 Eoperates with fixed frequency peak current control
with built-in compensation eliminates the need for
/ G) x3 y' s: J3 c7 P8 n( O6 Pexternal components.
Cycle-by-cycle current limit in high-side MOSFET
protects the converter in an overload condition.
2 X. c  \# p% L) V1 hHiccup mode protection is triggered if the
) Q, v; P6 v" O- o1 W8 Gover-current condition has persisted for longer than
the present time.
The ZCC1005 exhibits protection features that
% p6 w4 y, W8 t( }' qprotect the load from faults like under-voltage,
over-current and over-temperature.
The ZCC1005 is available in an ESOP-8 package.

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