OB2269 - On-Bright High-Performance current mode PWM Controller Chip

release time:2019-10-12 17:43 classification:Industry News Views:12977Times

OB2269 / OB2268

High Performance Current Mode PWM Controller


OB2269 / OB2268 is a highly integrated PWM control IC designed for AC/DC switch mode power applications. Implemented with On-Bright patented proprietary technology, it achieves low standby power and high efficiency at reduced BOM cost. It also features comprehensive protection coverage and performance enhancement (EMI, etc). 


Features: 

◆ Built-in leading edge blanking(LEB) at current sense input

◆ VDD over voltage protection (OVP)

◆ Over temperature protection (OTP)

◆ VDD under voltage lockout with hysteresis (UVLO)

◆ Over load protection (OLP)

◆ Built-in line compensated OCP achieving balanced OCP over universal input

◆ Frequency shuffling improving EMI performance (OB2269 only)

◆ Available in DIP8 and SOP8 packages,RoHS compliant


Applications: 

◆ LCD Monitor/TV Power, DVD Power, Notebook Adapter, PC/TV/Set-Box Power

Typical Application:


Alternative solution:

Six-level energy consumption standard - 80W power adapter IC M5579D


The M5579D is a high performance, low standby power, low cost, high efficiency current mode PWM control IC. The M5579D can operate in a green mode at the bottom of the valley under no-load or light-load conditions. It can achieve high conversion rate at high power, and can provide self-recovery protection with high efficiency and cycle-by-cycle current limit. Overload protection. Over temperature protection, and overvoltage protection. It has good frequency-hopping function and is used in a wide range of off-line AC/DC flyback adapters, various mobile phone charging ICs, and power adapter 100W fast charging solutions.


Compared to OB2269,

Advantages of the M5579D when making a 5V2A-5V4A power adapter:

1, the periphery is simple (can save 9 electronic components) M5579D can save 2 starting resistors compared to OB2263. As the latest technology, the M5579D is completely independent control technology. Can completely achieve zero peripheral working mode, save the traditional OB2263 used in the power supply RC filter, sw detection resistance, RT resistance, rc absorption resistance, EM filter.


2, high reliability: a. program three lines of defense, achieve SR and PSR zero pass-through risk; b. chip HBM ESD is greater than 4kV, latchup current is greater than 400mA, significantly improve system safety capabilities, contact static electricity up to 15kV; c. PSR and SR matching work, completely avoiding small-load sampling conflicts. Under abnormal conditions, SR performs supporting roles, and PSR dominates all abnormal protection.


3, low standby power consumption


M5579 green load valley bottom conduction technology, in the extended BUST mode of operation, it is easy to obtain extremely high conversion rate of standby power consumption, and can easily achieve standby power consumption within 25mW.

Typical Application: