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參數(shù)資料
| 型號： | TK75001 |
| 廠商： | TOKO Inc. |
| 英文描述： | PWM CONTROLLER |
| 中文描述： | 脈寬調制控制器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大小： | 102K |
| 代理商： | TK75001 |
January 1999 TOKO, Inc.
Page 1
TK75001
OSCILLATOR
FB
CT
ICHG
205 μA
fCLK
T
Q
TOGGLE FF
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
Off-Line Power Supplies
I
Industrial Power Supplies
I
Telecom Power Supplies
I
Off-Line Battery Chargers
FEATURES
I
Optimized for Off-Line Operation
I
Maximum Duty Ratio 44% (typ.)
I
Maximum Clock Frequency Above 1 MHz
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
TK75001
BLOCK DIAGRAM
DESCRIPTION
The TK75001 is a simplified primary side controller
optimized for off-line switching power supplies. 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.
The TK75001 is available in an 8-pin DIP package.
ORDERING INFORMATION
TAPE/REEL CODE
MG: Magazine
Tape/Reel Code
TK75001D
Temperature Code
TEMP. CODE (OPTIONAL)
I: -40 to +85 C
75001
GND
DRV
NC
VCC
GND
NC
FB
CT
Note: Pins 2 and 3 must be externally
connected for proper operation.
PWM CONTROLLER
相關PDF資料 |
PDF描述 |
|---|---|
| TK75001D | PWM CONTROLLER |
| TK75001DIMG | PWM CONTROLLER |
| TK75002 | ERROR SIGNAL ISOLATOR |
| TK75002D | ERROR SIGNAL ISOLATOR |
| TK75002DIMG | ERROR SIGNAL ISOLATOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TK75001D | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75001DIMG | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75001DIMG/75001 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75001DMG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
| TK75002 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:ERROR SIGNAL ISOLATOR |
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