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In the case of ceramic output capacitors, RESR is very small and does not contribute to the ripple. Typical inductor values for various output voltages are shown in Table 1. For other inquiries, please send to: In that case, the output capacitor is chosen to have sufficiently low ESR. When lower than 0. Connect this pin to the switching end of the inductor.

Therefore, a lower capacitance value can be used for ceramic type. In general, select an inductance value L based on the ripple current requirement: The voltage at this pin is regulated to 1.

ACT4060 Datasheet PDF

Therefore, a lower capacitance value can be used for ceramic capacitors. I redesigned power supply module and put it on separate PCB, datashheet now It seems that everything work without any problems.

The Oscillator normally switches at kHz. The trade off for high inductance value is the increase in inductor core size and series resistance, and the reduction in current handling capability.

Current limit happens when COMP reaches its maximum clamp value of 2. There is a problem when writing a datasheet. Active-Semi products are not intended or authorized for use as critical components in life-support devices or systems. Daatsheet EN is less than 0. Dec 248: Output voltage is very stable and SMPS doesn’t warm up even on load. The inductor current level is measured by the Current Sense Amplifier and added to the Oscillator ramp signal. Output voltage drop in flyback SMPS 9. Measuring air gap of a magnetic core for home-wound inductors and flyback transformer 7.


When lower than 0. When I tried to replace inductor to 10uH It dstasheet a little bit better but the problem still existed. Connect to the resistor divider between output and ground to set output voltage.

EN is internally pulled up with a 2? In that case, the output capacitor is chosen to have sufficiently low ESR.

No idea why, maybe guess b affects that. When I open the datasheet, then there is a complete chapter called ” Inductor selection”. The converter operates as follows: Act44060 Threads Drop voltage in output of LM 3.

A low ESR capacitor is highly recommended. Originally Posted by d A low current shutdown mode and output is discharged through the LowSide Power Switch.

ACT (ACTIVE-SEMI) PDF技术资料下载 ACT 供应信息 IC Datasheet 数据表 (6/9 页)

Finally, select the inductor core size so that it does not saturate at 3A. When I try to connect 5Ohms resistor to the output, voltage drops below 2V. In the case of tantalum or electrolytic types, they can be further away if a small parallel 0.


Many manufacturers therefore split those informations into several documents. Typical inductor values for various output voltages are shown in Table 1. How do you get an MCU design to market quickly? The DC loop gain of the system is determined by the following equation: When EN is higher than 1. Unfortunately I’m not sure what is the reason of my problem – probably messy PCB layout. Turn on power triac – proposed circuit analysis 0. At this point, the SW side of the inductor swings to a diode voltage below ground, causing the inductor current to decrease and magnetic energy to be transferred to output.

ACT datasheet & applicatoin notes – Datasheet Archive

I’ve tried lots of things but not eliminating problem. Choosing IC with EN signal 2. I know, the recommendation for a “good PCB layout” sounds so simple, but I know it isn’t.

It is table with a wide range of capacitace value. Typical Inductor Values L 1.

datzsheet F SP Cap 15k? The input capacitor should be placed close to the IN and G pins of the IC, with the shortest traces possible.

ACT4060 Datasheet

Hierarchical block is unconnected 3. Acf4060 voltage is discharged when the IC is off. How can the power consumption for computing be reduced for energy harvesting?