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TK83854DITL PDF预览

TK83854DITL

更新时间： 2024-11-24 22:19:39
品牌 Logo 应用领域
TOKO 稳压器高功率电源
页数 文件大小 规格书
12页 113K
描述
HIGH POWER FACTOR PREREGULATOR

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中文翻译

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TK83854DITL 数据手册

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TK83854  
HIGH POWER FACTOR PREREGULATOR  
FEATURES (CONT.)  
FEATURES  
■ Control Boost PWM to 0.99 Power Factor  
■ Limit Line Current Distortion to < 5%  
■ Worldwide Operation without Switches  
■ Feed-Forward Line Regulation  
■ Low Noise Sensitivity  
■ Low Start-Up Supply Current  
■ Fixed-Frequency PWM Drive  
■ Low-Offset Analog Multiplier/Divider  
■ 1 Amp Totem-Pole Gate Driver  
■ Precision Voltage Reference  
■ Pin Compatible with UC2854, and UC3854  
(Licensed Source)  
DESCRIPTION  
circuitry that supplies power to this device, the TK83854  
family features low start-up supply current.  
The TK83854 family of integrated circuits provide active  
power factor correction for power systems that otherwise  
would draw non-sinusoidal current from sinusoidal power  
lines. These parts implement all the control functions  
necessary to build a power supply preregulator capable of  
optimally using available power-line current while  
minimizing line-current distortion. To do this, the TK83854  
contains a voltage amplifier, a precision analog multiplier/  
divider, a current amplifier, and a fixed-frequency PWM. In  
addition, the TK83854 contains a power MOSFET gate  
driver, 7.5 V reference, line anticipator, load-enable  
comparator, low supply detector, and overcurrent  
comparator.  
These devices are available in 16-pin plastic dual in-line  
(DIP) and 16-pin surface mount (SOP) packages.  
TK83854  
GND  
GTDRV  
PKLMT  
V
CC  
CA  
OUT  
C
T
SOP-16  
I
SS  
SENSE  
MULT  
R
SET  
OUT  
IAC  
TheTK83854familyusesaveragecurrent-modecontrolto  
accomplish fixed-frequency current control with stability  
and low distortion. Unlike peak current-mode control,  
average current control accurately maintains sinusoidal  
line current without slope compensation.  
V
SENSE  
83854  
VA  
ENA  
OUT  
V
V
ref  
RMS  
DIP-16  
The TK83854's high reference voltage and high oscillator  
amplitude minimize noise sensitivity while fast PWM  
elements permit chopping frequencies above 200 kHz.  
The TK83854 can be used in systems with line voltages  
that vary from 75 to 275 V and with line frequencies across  
the 50 Hz to 400 Hz range. To reduce the burden on the  
BLOCK DIAGRAM  
VA  
MULT  
CA  
PKLMT  
V
V
CC  
OUT  
OUT  
OUT  
ref  
V
CC  
IC POWER  
7-5 V  
REF  
16/10 V  
RUN  
ENA  
GT  
DRV  
2.5/2.25 V  
7.5 V  
AB  
C
I
M
=
ORDERING INFORMATION  
15 V  
A
V
SENSE  
IAC  
B
C
TK83854  
R
R
S
2
V
Q
X
RMS  
14 µA  
SS  
Tape/Reel Code  
RUN  
OSC  
Package Code  
Extended Temp. Range  
1
I
C
R
SET  
GND  
SENSE  
T
TEMP. RANGE (OPTIONAL)  
I: -40 TO +85  
PACKAGE CODE  
D: DIP-16  
M: SOP-16  
TAPE/REEL CODE  
TL: Tape Left  
MG: Magazine  
C
January 1999 TOKO, Inc.  
Page 1  
1234567...12

中文翻译

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