(function(){
let w = window.innerWidth;
function setHeaderCssVar() {
const headerEle = document.getElementById('shoplaza-section-header');
if(!headerEle){ return };
document.body.style.setProperty('--window-height', `${window.innerHeight}px`);
document.body.style.setProperty('--header-height', `${headerEle.clientHeight}px`);
const mdScorllHideEle = headerEle.querySelector('.header__mobile .header__scroll_hide');
if (mdScorllHideEle) {
document.body.style.setProperty('--header-scroll-hide-height-md', `${mdScorllHideEle.clientHeight}px`);
}
const pcScorllHideEle = headerEle.querySelector('.header__desktop .header__scroll_hide');
if (pcScorllHideEle) {
document.body.style.setProperty('--header-scroll-hide-height-pc', `${pcScorllHideEle.clientHeight}px`);
}
}
function handlResize() {
if(w == window.innerWidth){return};
w = window.innerWidth;
setHeaderCssVar();
};
function init(){
setHeaderCssVar();
window.removeEventListener('resize', window._theme_header_listener)
window._theme_header_listener = handlResize;
window.addEventListener('resize', window._theme_header_listener);
}
init();
})();
${data.index + 1}/3
Description
Product Description
TL494 PWM Controller Module Adjustable 5V 250mA Power Supply Module
TL494 PWM adjustment module, which can adjust the output frequency and duty cycle, is widely used in switching power supply, PWM drive circuit, etc.
Features: The output PWM frequency can be adjusted within the range of 300Hz-100KHz, and the duty cycle can be adjusted up to 96% The output driving ability is strong, and the signal is stable.
Parameters: Module working voltage: DC 7V-40V limit 42V Maximum output current: 250mA Output voltage DC 5V Maximum power consumption: 1000mW Working environment temperature: 0-70 ℃
