Catalog
Product Overview
The WT7520 is a pulse–width modulation (PWM) control circuit with complete protection circuits for used in the SMPS (Switched Mode Power Supply). It contains various functions, which are Over Voltage Protection, Under Voltage Protection, Power Good Output (PGO), Remote On/Off control and etc. It can minimize external components of switching power supply systems in personal computer.
Over Voltage Protection (OVP) monitors 3.3V, 5V, 12V and PT input voltage level. Under Voltage Protection (UVP) monitors 3.3V, 5V and 12V input voltage level. Power Good Output monitors the voltage level of power supply.
WT7520 Pin Configuration
Figure: WT7520 Pin Configuration
WT7520 Block Diagram
Figure: WT7520 Block Diagram
WT7520 Features
- Complete PWM Control and Protection Circuitry
- Over Voltage Protection for 3.3V / 5V / 12V / PT
- Under Voltage Protection for 3.3V / 5V / 12V
- 280ms PG Time Delay
- Power Good Output is Open Drain Output
- PWM Control Output are Open Drain Output
- 280 mS Time Delay for UVP
- Remote ON/OFF function De–bounce Time
- Soft-Start function built-in
- 16–Pin Dual In–line Package
WT7520 Application Ciruit
Figure: WT7520 Application Ciruit
WT7520 Datasheet
You can download the datasheet from the link given below:
WT7520 Datasheet
WT7520 Manufacturer
Weltrend is a leading company in analog & mixed-signal/digital IC design in Taiwan. It has accumulated enormous technical expertise over the years with a rich digital/analog IP portfolio and expanded its products to advanced applications spanning across video signal processing, high-efficiency BLDC motor control, data security, vital sign detection, and digital power.
Using Warning
Note: Please check their parameters and pin configuration before replacing them in your circuit.
WT7520 FAQ
What is PWM power supply?
Pulse Width Modulation (PWM), also known as pulse-duration modulation (PDM), is a technique for reducing the average power in an Alternating Current (AC) signal. Effectively chopping off parts of the waveform reduces the average voltage without affecting the base frequency of the signal.
What is PWM and how it works?
Pulse Width Modulation (PWM) is a technique to generate low frequency output signals from high frequency pulses. Rapidly switching the output voltage of an inverter leg between the upper and lower DC rail voltages, the low frequency output can be thought of as the average of voltage over a switching period.
Why PWM is required?
PWM is used in many applications, ranging from communications to power control and conversion. For example, the PWM is commonly used to control the speed of electric motors, the brightness of lights, in ultrasonic cleaning applications, and many more.