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參數(shù)資料
| 型號： | TK75003 |
| 廠商： | TOKO Inc. |
| 英文描述： | PWM CONTROLLER |
| 中文描述： | 脈寬調(diào)制控制器 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 108K |
| 代理商： | TK75003 |
January 1999 TOKO, Inc.
Page 1
TK75003
OSCILLATOR
FB
CT
ICHG
205 μA
fCLK
COMSLOPE
1.35 V
PWM LATCH
DRV
CURRENT
ODETECTOR
GND
BANDGAP
UVLO
14.5 V
10.5 V
VCC
S
R
Q
IFR
146 μA
ICT
REDUCTION
LATCH
17.5 V
0.98 V
S
Q
R
IDS
2 mA
APPLICATIONS
I
Power Factor Correction Converters
I
Off-Line Power Supplies
I
Industrial Power Supplies
I
Telecom Power Supplies
I
Off-Line Battery Chargers
FEATURES
I
Power Factor Correction/Line Harmonics
Reduction to Meet IEC1000-3-2 Requirements
I
Optimized for Off-Line Operation
I
Maximum Duty Ratio 88% (typ.)
I
Frequency Reduction for Improved Overcurrent
Protection
I
Low Standby Current for Current-Fed Start-Up
I
Current-Mode or Voltage-Mode Control
I
Internal User-Adjustable Slope Compensation
I
Functionally Integrated & Simplified 5-Pin Design
DESCRIPTION
TK75003
BLOCK DIAGRAM
The TK75003 is a simple primary side controller optimized
for off-line switching power supplies including power factor
correctors. It is suitable for both voltage-mode and current-
mode control and has advanced features not available in
controllers with a higher pin count. The key to full
functionality in a 5-pin design is that the current signal and
the error signal are added together and fed into the
feedback pin. A sawtooth current flowing out of the feedback
pin provides a slope compensation ramp (in current-mode
applications) or a PWM ramp (in voltage-mode
applications), in proportion to the resistance terminating
that pin. If the sum of the current sense signal, error signal
and ramp signal exceeds the Overcurrent Detector
threshold indicating that the Current Control Detector has
lost control of the switch current, the charging current of
the timing capacitor will be reduced to about 25% for the
remainder of the clock period. The reduced charging
current causes no more than a one-third reduction in
switching frequency, effectively preventing short-circuit
current runaway.
ORDERING INFORMATION
TAPE/REEL CODE
MG: Magazine
Tape/Reel Code
TK75003D
Temperature Code
TEMP. CODE (OPTIONAL)
I: -40 to +85 C
75003
GND
DRV
NC
VCC
GND
NC
FB
CT
Note: Pins 2 and 3 must be externally
connected for proper operation.
PWM CONTROLLER
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TK75003D | PWM CONTROLLER |
| TK75003DIMG | PWM CONTROLLER |
| TK75005DCTL | LOW-COST FLEXIBLE PWM CONTROLLER |
| TK75005 | LOW-COST FLEXIBLE PWM CONTROLLER |
| TK75005DCMG | LOW-COST FLEXIBLE PWM CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TK75003D | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75003DIMG | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75003DIMG/75003 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75005 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW-COST FLEXIBLE PWM CONTROLLER |
| TK75005DCMG | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW-COST FLEXIBLE PWM CONTROLLER |
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