• CW1131CW1131


CW1131 is a SOT23-3 packaged three pin non isolated BUCK fixed 5V output power chip, high integration and low-cost PWM power switch, suitable for buck and buck circuits.

Send Inquiry

Product Description

High performance, low cost off-line PWM control switch

The CW1131 is a non-isolated, highly integrated and low-cost PWM power switch for buck and lift circuits. The CW1131 uses a high voltage single wafer process that integrates a 500V high voltage MOSFETs and a controller controlled by switching peak current mode on the same wafer. High precision 5V default output is guaranteed in the full voltage input range.

Inside the chip, the minimum Toff time of the chip is fixed at 32us and there is a buffeting function, which optimizes the EMI effect under the condition of ensuring the output power. At the same time, the chip is designed with heavy and heavy load mode, which can easily obtain standby power consumption of less than 50mW. CW1131 integrates complete protection functions: VDD undervoltage protection, cycle by cycle current limit, abnormal overcurrent protection, overheat protection, overload protection and short circuit protection.

Main feature

• High precision 5V default output

• Integrated 500V high voltage MOSFET and high voltage start circuit

• Integrated sampling resistance, low system cost

• Supports ultra-low voltage input (more than 15V) applications

• supports step-down and step-down circuits

• switching peak current mode control

• Ultra-low standby power consumption less than 50mW

• Ultra-low working current, support small VDD capacitor

• Integrated soft start circuit

• Integrated protection features:

• Overload Protection (OLP)

• Overheat Protection (OTP)

• Cycle by Cycle Current Limit (OCP)

• Abnormal Overcurrent Protection (AOCP)

• Front blanking (LEB)

• VDD Undervoltage protection

• Package SOT23-3L

Contact Us

Shenzhen Headquarters: 10th Floor, Research and Development Center Building, EVOC Industrial Park, 

Guangming Street, Guangming District, Shenzhen City, Guangdong Province, China

Company Official Website:



Telephone: +86-18681585060


Hot Tags: CW1131, China, Manufacturer, Supplier, Factory, Customized, Low Price, Quality, Advanced, Durable, Latest Selling, In Stock

Related Category

Send Inquiry

Please feel free to give your inquiry in the form below. We will reply you in 24 hours.
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. By using this site, you agree to our use of cookies. Privacy Policy
Reject Accept