STR-V153

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

PMIC - AC DC Converters, Offline Switchers

STR-V153 is a monolithic integrated offline switcher from Sanken Electric that is designed as an entry-level power supply dedicated to cost-sensitive application designs such as PC peripherals, consumer electronics and automotive applications. This high-performance IC delivers excellent power conversion performance and improved energy efficiency.

Application field

The STR-V153 switches at a frequency of 70–90 kHz and boasts a low standby power dissipation (<0.25 W at primary side). It is fully programmable with a maximum operating frequency of 100 kHz, allowing customers to optimize output efficiency and cost.

Based on an innovativehybrid chopper design, the STR-V153 provides an all-in-one solution for offline AC/DC flyback converters. The device contains a power MOSFET, constant current control, low-R DS(on) pre-driver and control IC bonding pads, saving PCB space and cost. As a result, it is an excellent solution for compact light-weight applications.

The STR-V153 is suitable for a variety of low-power electronics applications, such as PC monitors, LCD TVs, game consoles, set-top boxes, and LED lighting. It is also used in energy- efficient consumer electronics and automotive applications.

Working principle

The STR-V153 integrated offline switcher works with a peak current mode (PCM) control approach. With this approach, the current and voltage are both monitored and regulated to maintain an acceptable output power. This means that the output voltage is not affected by the current or load voltage, letting the circuit to achieve constant power dissipation over a wide input voltage range.

A key feature of the STR-V153 is its MOSFET protection circuit. This protects the primary side of the converter in the event of an over-voltage or over-current. The MOSFET protection circuit consists of a resistor, a Zener diode, and a MOSFET, which are connected in parallel to the AC input voltage and output voltage. In case of an over- current condition, the MOSFET triggers a current limit circuit, which shuts off the MSFET.

The STR-V153 integrated offline switcher has a unique programmable "soft start" feature, which prevents large inrush currents during start-up. This feature is especially useful in a power supply system that has high inrush currents. The device also features a built-in protection circuit and all the necessary components, such as MOSFET, schotky diode, Zener diode, dead-time delay circuit and soft start time constant, to protect the power supply from over-voltage, over-current and over-temperature conditions.

In summary, the STR-V153 is an ideal solution for cost-sensitive offline AC/DC flyback converter applications. Its integrated design is easy to program and provides excellent power conversion performance, improved energy efficiency, protection from over-voltage, over-current and over-temperature conditions, and low standby power dissipation.

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