IS200AEBMG1AFB工控模塊系統備件
帶低ESR電容器
將S/S引腳拉高，將其連接到VIN或保持浮動(dòng)。要同步切換，請在600kHz和800kHz之間驅動(dòng)S/S引腳。 VIN：帶低ESR電容器的旁路輸入電源引腳，10μF或更高。當VIN降至2.5V以下時(shí)，調節器進(jìn)入欠壓鎖定狀態(tài)。欠壓鎖定停止開(kāi)關(guān)并將VC引腳拉低。VSW：開(kāi)關(guān)引腳是電源開(kāi)關(guān)的集電極，有大電流流過(guò)。盡量縮短開(kāi)關(guān)元件的跡線(xiàn)，以盡量減少輻射和電壓尖峰。
接地：
將所有接地引腳連接到高質(zhì)量接地平面。請參閱應用程序信息。6 LT1370 sn1370 1370fs框圖操作U LT1370是一個(gè)電流模式開(kāi)關(guān)。這意味著(zhù)開(kāi)關(guān)占空比由開(kāi)關(guān)電流而不是輸出電壓直接控制。參考方框圖，開(kāi)關(guān)在每個(gè)振蕩器周期開(kāi)始時(shí)接通。當開(kāi)關(guān)電流達到預定水平時(shí)，它關(guān)閉。通過(guò)使用電壓感測誤差放大器的輸出來(lái)設置電流跳閘電平來(lái)獲得對輸出電壓的控制。這種技術(shù)有幾個(gè)優(yōu)點(diǎn)。
With low ESR capacitor
Pull the S/S pin up, connect it to the VIN or keep it floating. To switch synchronously, drive the S/S pin between 600kHz and 800kHz. VIN: Bypass input power supply pin with low ESR capacitor, 10 μ F or higher. When the VIN drops below 2.5V, the regulator enters the undervoltage locking state. Undervoltage lockout stop switch and pull down VC pin. VSW: The switch pin is the collector of the power switch, and a large current flows through it. Shorten the trace of switching elements as much as possible to minimize radiation and voltage spikes.
Grounding:
Connect all ground pins to a high quality ground plane. See application information. 6 The LT1370 sn1370 1370fs block diagram operation U LT1370 is a current mode switch. This means that the switching duty cycle is directly controlled by the switching current rather than the output voltage. Referring to the block diagram, the switch turns ON at the beginning of each oscillator cycle. When the switching current reaches a predetermined level, it turns off. The output voltage is controlled by setting the current trip level using the output of the voltage sensing error amplifier. This technology has several advantages.
