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參數資料
| 型號： | TK75020 |
| 廠商： | TOKO INC |
| 元件分類： | 穩壓器 |
| 英文描述： | ZVS RESONANT CONTROLLER |
| 中文描述： | FLUORESCENT LIGHT CONTROLLER, 165 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | SOP-14 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 87K |
| 代理商： | TK75020 |
January 1999 TOKO, Inc.
Page 1
TK75020
FEATURES
I
Optimized for Off-Line and Battery Powered
Operation
I
Internal Zero-Voltage Detector
I
Soft-Start
I
Pulse-by-Pulse Current Limit
I
Overdissipation Protection with Soft-Start
I
Overvoltage Protection with Soft-Start
I
Low-Current Standby mode
I
Programmable On/Off Timing
I
Enable Control
APPLICATIONS
I
Cold Cathode Fluorescent Lamps
I
Resonant Power Supplies
I
Power Supplies for Notebook Computers
I
Power Supplies for Personal Electronics
DESCRIPTION
The TK75020 is a low-cost, high-performance Zero-Voltage
Switching (ZVS) controller IC. The primary applications
are in inverters for Cold Cathode Fluorescent Lamps
(CCFL) and in ZVS quasi-resonant or multi-resonant
converters. The combination of a unique (patent-pending)
control concept and a ZVS resonant inverter generates
low-distortion sine wave for the fluorescent lamp, leading
to extended lamp life and high luminous efficiency. The IC
features all necessary circuits of a controller for such
applications, including externally adjustable timing
parameters (frequency, T
on(min)
, T
off(max)
), current limit,
Soft-Start, enable, error amplifier, and a trimmed reference.
The same reference is used for undervoltage protection
and other critical internal biases. Supply current in the “off”
mode is kept at a minimum level (2
μ
A typical). Special
care has been taken to avoid undesirable turn-on of the
external power MOSFET when sufficient supply voltage is
not available, or when the device is held in the off mode.
Even with no V
cc
applied, the drive pin of the IC will sink in
excess of 20 mA while maintaining the voltage below 1 V
to prevent that leakage currents turn on the power MOSFET.
An internal zero-voltage detector monitors the voltage
across the MOSFET and ensures that the turn-on will only
take place under zero-voltage conditions. A unique
overdissipation protection prevents the overheating of the
power MOSFET in case the zero-voltage switching is lost.
The TK75020 is available in a 14-lead surface mount
package.
ORDERING INFORMATION
TAPE/REEL CODE
TL: Tape Left
Tape/Reel Code
TK75020
TK75020
75020
VCC
Vref
DRV
GND
OVP
EN
CT
TOFF(MAX)
TON/SS
CL
ZVD
EAOUT
EAINV
ODP
ZVS RESONANT CONTROLLER
相關PDF資料 |
PDF描述 |
|---|---|
| TK75020TL | ZVS RESONANT CONTROLLER |
| TK75050 | SMART MOSFET DRIVER |
| TK75050D | SMART MOSFET DRIVER |
| TK75050DITL | SMART MOSFET DRIVER |
| TK83361M | NARROW BAND FM IF IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TK75020TL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:ZVS RESONANT CONTROLLER |
| TK75020TL/75020 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:ZVS RESONANT CONTROLLER |
| TK75050 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:SMART MOSFET DRIVER |
| TK75050D | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:SMART MOSFET DRIVER |
| TK75050DITL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:SMART MOSFET DRIVER |
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