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SC4910BITSTRT PDF预览

SC4910BITSTRT

更新时间: 2024-01-04 10:02:35
品牌 Logo 应用领域
商升特 - SEMTECH 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
19页 318K
描述
High Performance Secondary Side Controller with Synchronous Rectifier

SC4910BITSTRT 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:TSSOP
包装说明:ROHS COMPLIANT, MO-153AC, TSSOP-20针数:20
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.68
Is Samacsys:N其他特性:CURRENT MODE OPRATION ALSO POSSIBLE
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:15 V
最小输入电压:4.45 V标称输入电压:12 V
JESD-30 代码:R-PDSO-G20JESD-609代码:e3
长度:6.5 mm功能数量:1
端子数量:20最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:0.15 A
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装等效代码:TSSOP20,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:1.2 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:1000 kHz
温度等级:AUTOMOTIVE端子面层:MATTE TIN
端子形式:GULL WING端子节距:0.65 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:4.4 mmBase Number Matches:1

SC4910BITSTRT 数据手册

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SC4910A/B  
High Performance Secondary Side  
Controller with Synchronous Rectifier  
POWER MANAGEMENT  
Description  
Features  
The SC4910A/B is an integrated, full featured, second-  
ary side controller designed for use in single ended and  
isolated switch mode power supplies with synchronous  
rectification where efficiency and fast transient response  
are of primary concern. The SC4910A/B has outputs for  
both primary FET and secondary synchronous rectifica-  
tion. The primary drive output is designed to drive a small  
and low cost pulse transformer to isolate the primary  
FET driver. The secondary control makes it much easier  
to monitor and control the system load with tight control  
loops and implement load current sharing and synchro-  
nous rectification.  
‹ Synchronous rectification with adaptive control  
‹ Programmable secondary side delay  
‹ Programmable switching frequency  
‹ Programmable max. duty cycle  
‹ Remote voltage sense capability  
‹ Close-loop soft start with active low shutdown  
‹ 0.75V precision reference for low output applications  
‹ Oscillator sychronization  
‹ Undervoltage Lockout  
‹ Operation to 1MHz  
‹ Current-mode or voltage-mode operation  
‹ Single stage power conversion with multiphase link  
capability (with SC4201)  
‹ Monotonic start-up with pre-biased output  
‹ Active current sharing capability  
‹ 20 pin TSSOP package  
The SC4910A/B features synchronous rectification, multi-  
phase link capability, programmable secondary side  
delay, programmable switching frequency and program-  
mable maximum duty cycle. It is designed for either  
current mode or voltage mode operation.  
Applications  
‹ Telecom isolated DC to DC converters  
‹ Isolated VRMS  
The SC4910A has a typical turn-on threshold of 9V and  
the SC4910B has a threshold of 4.5V.  
‹ Networking power supplies  
‹ Industrial power supplies  
‹ Distributed power architectures  
‹ High density power modules  
L1  
Typical Application Circuit  
+Vin  
T1  
R1  
R2  
C1  
C3  
LOAD  
C2  
M1  
D1  
M2  
SC1301  
SC1301  
+12V  
C4  
SC1301  
M3  
SC4910  
14  
AVCC  
ISHARE  
12  
PVCC  
CS  
13  
PVCC  
D2  
16  
6
T2  
4
10  
R3  
OUTA  
RT1  
PHASE  
OUTB  
R4  
R5  
20  
19  
3
11  
C5  
17  
18  
RT2  
COMP  
FB  
C6  
R6  
R7  
R8  
SS  
2
15  
5
SYNC/EN  
DELAY  
1
-SENSE  
PGND  
9
VREF  
AGND PGND  
7
8
C8  
R9  
C9  
D3  
C10  
T3  
Revision: June 1, 2005  
1
www.semtech.com  

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