Product parameters

Funtion：4.5V to 32V Input Current Mode Boost DC-DC Controller

Opration Mode：PWM BOOST

Vin Range：4.5V-32V

Operating Current：810uA

Chip Temperature Regulation：No

Package：SSOP10

Max Output Power：35W

Chip Enable：Yes

On-chip Power MOSFET：No

General Description:

The CN5120 is a current mode fixed-frequency PWM controller for both flyback and step-up DC-DC converters. The device operates from an input supply between 4.5V and 32V and provides to drive an external N-channel MOSFET.

The CN5120 contains all the necessary building blocks including a bandgap reference, a 330KHz oscillator, current-mode control circuitry, chip shutdown block, softstart block and gate driver, etc.

Current mode control provides improved transient response and simplified loop compensation. On-chip soft start reduces the inrush current on power up. The other features include chip shutdown, over voltage protection, built-in 5V regulator and slope compensation, etc.

The CN5120 is available in 10-pin SSOP package.

Applications:

l  TFT-LCD Bias Supplies

l  XDSL Power Supplies

l  Medical Equipments

l  Digital Video Cameras

l  Portable Devices

 

Features:

l  Peak Current Mode DC-DC Boost/ Flyback Controller

l  4.5V to 32V Input Range

l  330kHz Switching Frequency

l  ±2% Output Voltage Accuracy

l  Cycle-by-Cycle Peak Inductor Current Limit

l  On-Chip Slope Compensation

l  Internal Soft-start

l  Built-in 5V regulator

l  Low Shutdown Current

l  Operating Temperature Range:
     －40℃ to 85℃

l  Available in 10-pin SSOP package.

l  Lead-free, Rohs-compliant and Halogen-free