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SC1205H PDF预览

SC1205H

更新时间: 2024-10-26 04:05:35
品牌 Logo 应用领域
商升特 - SEMTECH 驱动器
页数 文件大小 规格书
13页 228K
描述
high speed syncronous power mosfet driver

SC1205H 数据手册

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SC1205H  
High Speed Synchronous Power  
MOS!ET Driver  
POWER MANAGEMENT  
PRELIMINARY  
ꢀeatures  
Description  
The SC1205H is a cost effective, High Drive Voltage,  
Dual MOSꢀET Driver designed for switching High and Low  
side Power MOSꢀETs. Each driver is capable of Ultra-  
fast rise/fall times as well as a 20ns max propagation  
delay from input transition to the gate of the power ꢀET’s.  
An internal Overlap Protection circuit prevents shoot-  
through from Vin to GND in the main and synchronous  
MOSꢀETs. The Adaptive Overlap Protection circuit en-  
sures the Bottom ꢀET does not turn on until the Top ꢀET  
source has reached a voltage low enough to prevent  
cross-conduction.  
u Higher efficiency (>90%)  
u ꢀast rise and fall times (15ns typical with 3000pf  
load)  
u Higher gate drive voltage (8V) for optimum  
MOSꢀET RDS_ON at minimum switching loss  
u Ultra-low (<20ns) propagation delay (BG going low)  
u 5 Amp peak drive current  
u Adaptive non-overlapping gate drives provide  
shoot-through protection  
u ꢀloating top drive switches up to 18V  
u Under-voltage lock-out  
u Over-temperature shutdown  
Higher gate voltage drive capability of 8V (top and  
bottom) optimally reduces Rds_on of power MOSꢀETs  
without excessive driver and ꢀET switching losses. The  
high current drive capability (5A peak) allows fast switch-  
ing, thus reducing switching losses at high (up to 1MHz)  
frequencies without causing thermal stress on the driver.  
u Less than 10µA supply current when EN is low  
u Low cost  
Applications  
u Intel PentiumTM power supplies  
u AMD AthlonTM and K8TM power supplies  
u High efficiency portable and notebook computers  
u Battery powered applications  
The high voltage CMOS process allows operation from 5-  
18 Volts at top MOSꢀET drain, thus making SC1205H  
suitable for battery powered applications. Connecting  
Enable pin (EN) to logic low shuts down both drives and  
reduces operating current to less than 10µA.  
u High frequency (to 1.0 MHz) operation allows use  
of small inductors and low cost caps in place of  
electrolytics  
An under-voltage-lock-out and overtemperature shut-  
down feature is included to guarantee proper and safe  
operation. The SC1205H is offered in a standard SO-8  
package.  
Typical Application Circuit  
2.5m  
Vin 5-12V  
2200uf  
10u,CER  
+8V  
10nf  
10  
70N03  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
BST  
VID4  
VCC  
BGOUT  
OC+  
TG  
+8V  
VID3  
VS  
EN  
DRN  
70N03  
VID2  
BG  
VID1  
OUT1  
OUT2  
OC-  
CO  
SC1205H  
GND  
VID0  
1.5V,40A  
ERROUT  
FB  
70N03  
BST  
UVLO  
GND  
TG  
+8V  
Rf  
RREF  
VS  
EN  
CO  
DRN  
70N03  
Rref  
BG  
SC2422B  
Ri  
SC1205H  
GND  
1
www.semtech.com  
Revision 2, June 2002  

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