Datasheet 搜索 > DC/DC转换器 > TI（德州仪器） > UCC38085PW 数据手册 > UCC38085PW 数据手册 1/44 页
器件3D模型￥ 10.678
UCC38085PW 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
DC/DC转换器
封装:
TSSOP-8
描述:
PWM控制器
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3P4P8P9P10P11P12P13Hot
典型应用电路图在P1
原理图在P6
封装尺寸在P34P36P37
型号编码规则在P3
标记信息在P34
封装信息在P34P35P36P37
功能描述在P9P14P15P16P17P18P19
技术参数、封装参数在P2
应用领域在P1P43
电气规格在P4P5
型号编号列表在P3
导航目录
UCC38085PW数据手册
Page:
of 44 Go
若手册格式错乱，请下载阅览PDF原文件
UCC2897A
SLUS829D -- AUGUST 2008 -- REVISED JULY 2009
ADVANCED CURRENT-MODE
ACTIVE CLAMP PWM CONTROLLER
1
www.ti.com
FEATURES
D Low Output Jitter
D “Soft Stop” shut down of MAIN and AUX
D 110-V Input Startup Function
D Ideal for Active Clamp/Reset Forward,
Flyback and Synchronous Rectifier Uses
D Provides Complementary Auxiliary Driver
with Programmable Deadtime (Turn-On
Delay) between AUX and MAIN Switches
D Peak Current-Mode Control with 0.5-V
Cycle-by-Cycle Current Limiting
D TrueDrivet 2-A Sink, 2-A Source Outputs
D Trimmed Internal Bandgap Reference for
Accurate Line UV and Line OV Threshold
D Programmable Slope Compensation
D High-Performance 1.0-MHz Synchronizable
Oscillator with Internal Timing Capacitor
D Precise Programmable Maximum Duty Cycle
D PB-Free Lead Finish Package
APPLICATIONS
D High-Efficiency DC/DC Power Supplies
D Server Power, 48-V Telecom, Datacom, and
42-V Automotive Applications
DESCRIPTION
The UCC2897A PWM controller simplifies
implementation of the various active clamp/reset
and synchronous rectifier switching power
topologies.
The UCC2897A is a peak current-mode, fixed-
frequency, high-performance pulse width modulator .
It includes the logic and the drive capability for the
P-channel auxiliary switch along with a simple
method of programming the critical delays for
proper active clamp operation.
Features include an internal programmable slope
compensation circuit, precise D
MAX
limit, and a
synchronizable oscillator with an internal timing
capacitor. An accurate line monitoring function
also programs the converter’s ON and OFF
transitions with regard to the bulk input voltage,
VIN.
The UCC2897A adds a second level hiccup mode
current sense threshold, bi-directional
synchronization and input overvoltage protection
functionalities. The UCC2897A is offered in 20-pin
TSSOP (PW) and 20-pin QFN (RGP) package.
TYPICAL APPLICATION DIAGRAM
C
BIAS
R
OUT
C
AUX
D
AUX
L
O
7
15
14
1
18
3
4
5
RDEL
RON
ROFF
SYNC
LINEUV
OUT
AUX
PGND
6VREF
13
R
DEL
LINEOV
UCC2897A
8GND
9CS
10 RSLOPE
17VDD
FB
11
C
VREF
R
ON
R
OFF
R
SLOPE
C
F
SECONDARY
SIDE E/A
Q1
Q2
C
O
LOAD
SR
DRIVE
BIAS
WINDING
+VIN
19
16
VIN
PVDD
SS/SD12
C
SS
D1
D3
Q3
D4
Q4
These devices have limited built -in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PRODUCTION DATA information is curre nt as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2008 -- 2009, Texas Instruments Incorporated
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
