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參數(shù)資料
| 型號(hào)： | UCC2570Q |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Very low drop voltage regulators with inhibit |
| 中文描述： | 電壓模式開(kāi)關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 395K |
| 代理商： | UCC2570Q |
UCC1580-1,-2,-3,-4
UCC2580-1,-2,-3,-4
UCC3580-1,-2,-3,-4
SLUS292A - FEBRUARY 1999 - REVISED JANUARY 2002
FEATURES
Provides Auxiliary Switch Activation
Complementary to Main Power
Switch Drive
Programmable deadtime (Turn-on
Delay) Between Activation of Each
Switch
Voltage Mode Control with
Feedforward Operation
Programmable Limits for Both
Transformer Volt- Second Product
and PWM Duty Cycle
High Current Gate Driver for Both
Main and Auxiliary Outputs
Multiple Protection Features with
Latched Shutdown and Soft Restart
Low Supply Current (100
μ
A Startup,
1.5mA Operation)
BLOCK DIAGRAM
DESCRIPTION
The UCC3580 family of PWM controllers is designed to implement a variety
of active clamp/reset and synchronous rectifier switching converter topolo-
gies. While containing all the necessary functions for fixed frequency, high
performance pulse width modulation, the additional feature of this design is
the inclusion of an auxiliary switch driver which complements the main
power switch, and with a programmable deadtime or delay between each
transition. The active clamp/reset technique allows operation of single
ended converters beyond 50% duty cycle while reducing voltage stresses
on the switches, and allows a greater flux swing for the power transformer.
This approach also allows a reduction in switching losses by recovering en-
ergy stored in parasitic elements such as leakage inductance and switch
capacitance.
The oscillator is programmed with two resistors and a capacitor to set
switching frequency and maximum duty cycle.
ramp provides a voltage feedforward pulse width modulation and a pro-
grammed maximum volt-second limit. The generated clock from the oscilla-
tor contains both frequency and maximum duty cycle information.
A separate synchronized
(continued)
Single Ended Active Clamp/Reset PWM
UDG-95069-2
Pin Numbers refer to DIL-16 and SOIC-16 packages
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCC2580J-1 | Very low drop voltage regulators with inhibit |
| UCC2580J-2 | Very low drop voltage regulators with inhibit |
| UCC2580J-3 | Very low drop voltage regulators with inhibit |
| UCC2580J-4 | Very low drop voltage regulators with inhibit |
| UCC2580Q-1 | Very low drop voltage regulators with inhibit |
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| UCC2580-1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Single Ended Active Clamp/Reset PWM |
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