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UCC3857DW PDF预览

UCC3857DW

更新时间: 2024-11-10 13:15:07
品牌 Logo 应用领域
德州仪器 - TI 调节器功率因数校正控制器
页数 文件大小 规格书
10页 129K
描述
Isolated Boost PFC Preregulator Controller 20-SOIC 0 to 70

UCC3857DW 技术参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:PLASTIC, SOIC-20针数:20
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.92
Is Samacsys:N模拟集成电路 - 其他类型:POWER FACTOR CONTROLLER
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:16 V最小输入电压:9 V
标称输入电压:12 VJESD-30 代码:R-PDSO-G20
长度:12.8 mm功能数量:1
端子数量:20最高工作温度:70 °C
最低工作温度:最大输出电流:1 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP20,.4封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:2.65 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:BOOST最大切换频率:500 kHz
技术:BICMOS温度等级:COMMERCIAL
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.5 mmBase Number Matches:1

UCC3857DW 数据手册

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UCC1857  
UCC2857  
UCC3857  
PRELIMINARY  
Isolated Boost PFC Preregulator Controller  
FEATURES  
DESCRIPTION  
PFC With Isolation, V < V  
The UCC3857 provides all of the control functions necessary for an Iso-  
lated Boost PFC Converter. These converters have the advantage of trans-  
former isolation between primary and secondary, as well as an output bus  
voltage that is lower than the input voltage. By providing both power factor  
correction and down conversion in a single power processing stage, the  
UCC3857 is ideal for applications which require high efficiency, integration,  
and performance.  
O
IN  
Single Power Stage  
Zero Current Switched IGBT  
Programmable ZCS Time  
Corrects PF to >0.99  
The UCC3857 brings together the control functions and drivers necessary  
to generate overlapping drive signals for external IGBT switches, and pro-  
vides a separate output to drive an external power MOSFET which pro-  
vides zero current switching (ZCS) for both the IGBTs. Full programmability  
is provided for the MOSFET driver delay time with an external RC network.  
ZCS for the IGBT switches alleviates the undesirable turn off losses typi-  
cally associated with these devices. This allows for higher switching fre-  
quencies, smaller magnetic components and higher efficiency. The power  
factor correction (PFC) portion of the UCC3857 employs the familiar aver-  
age current control scheme used in previous Unitrode controllers. Internal  
circuitry changes, however, have simplified the design of the PFC section  
and improved performance.  
Fixed Frequency, Average Current  
Control  
Improved RMS Feedforward  
Soft Start  
9V to 18V Supply V Range  
20-Pin DW, N, J, and L Packages  
(continued)  
TYPICAL APPLICATION CIRCUIT  
+
T1  
C
F
RECTIFIED  
V
AC INPUT  
BIAS  
SUPPLY  
QA  
Q1  
Q2  
OUT  
R
S
FEEDBACK  
CKT  
REF  
Z
C
OPTO  
R
AC  
13  
3
PKLMT MOUT  
IAC  
7
8
4
15  
CA–  
CAO VIN  
VD  
1
2
MOSDRV 14  
IGDRV1 16  
IGDRV2 18  
DELAY 12  
CRMS  
UCC3857  
10 VA–  
11 VAO  
Z
V
REF  
REF  
5
VREF  
SS  
20  
RT  
19  
CT  
20  
PGND  
17  
AGND  
6
UDG-98065  
02/99  

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