78ST136SC

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

DC-DC Converters are a type of electrical device which transforms the voltage of one DC source to another, often of a higher or lower magnitude. This kind of device is applicable to a wide range of industries and applications, such as aerospace, automotive, medical or industrial. In this article, we’ll take a look at one specific example of a DC-DC converter, that being the 78ST136SC.

The 78ST136SC Processor

The 78ST136SC is a high-efficiency DC-DC converter integrated switch controller and power MOSFET, suitable for high-performance step-up/down battery voltage conversion. It’s available as a six-pin SOT-23 package making it suitable for use in a range of portables and hand-held applications. The device itself is a buck converter that operates at frequencies up to 1MHz.

The 78ST136SC Application Field and Working Principle

The 78ST136SC application field can include mobile phones, tablet PCs, notebook PCs, digital cameras, routers, and other low voltage battery powered devices. The processor can boost up to 6V for LCD, LED driver, and other DC to DC power conversion applications.

At its core, the 78ST136SC has an integrated switch controller, complete with an adjustable error amplifier, which makes it simple to design the optimal output power. It switches at 1MHz to reduce the size of external passive components and can offer efficiencies up to 95%.

Detailed Working Process and Other Features

To understand how the 78ST136SC works, you first need to understand a few basic principles. The processor maintains a constant frequency PWM voltage-mode operation, and requires a minimum of external components. It features adjustable output voltage, adjustable switching frequency, and protection features such as soft-start and over-temperature protection.

When it comes to the working process, the 78ST136SC has an integrated controller to monitor the output voltage, sensing the feedback voltage and adjusting to the preset value automatically. It could store the following operations:

• Vin power supply
• Comparator
• Oscillator
• Voltage feed-forward reference
• FET driver
• Voltage sensing
• oltage reference
• Current limit
• Thermal protection
• Soft start/soft stop

Once the 78ST136SC starts to work, the voltage on the input side will be converted to the output voltage by controlling the on/off switch of the FET. The switching timescale is determined by the frequency of the oscillate signal. When it reaches the condition of low-voltage such as 0.02 V, the instantaneous discharging circuit will be activated to discharge the residual energy from the output.

Moreover, the 78ST136SC also has extreme portability. It measures only six pins and its body is relatively small in size, making it fit into a wide range of tiny enclosures. It also has protection features such as UVLO, soft-start, and over-temperature protection.

Conclusion

The 78ST136SC is an example of an efficient and simple DC-DC Converter, ideal for mobile applications and applications with low-voltage battery supply such as medical and industrial applications. With its integrated switch controller and power MOSFET, the 78ST136SC can boost 6V and provide great protection features, in addition to its portability. It’s easy to see why the 78ST136SC has become a top choice in many applications.

The specific data is subject to PDF, and the above content is for reference