OB5269 – PWM Controller – On-Bright

Part number : OB5269

Functions : This is Semiconductor, High Voltage Green Mode PWM Controller.

Pin arrangement :

1 RT I
Dual function pin. Either connected through a NTC resistor to ground for over temperature shutdown/latch control or connected through Zener to VDD for adjustable over voltage protection

2 FB I Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and the current-sense signal at CS pin

3 CS I Current sense input
4 GND P Ground
5 Gate O Totem-pole gate driver output for power Mosfet
6 VDD P Power Supply
8 HV P Connected to the line input or bulk capacitor via resistors for startup

Package information : SOP8 type

Manufacturer : On-Bright Electronics

Image :

OB5269 Datasheet PDF

The texts in the PDF file :

OB5269 is a highly integrated current mode PWM control IC with high voltage start up, optimized for high performance, low standby power consumption and cost effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed and is trimmed to a tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Very low standby power consumption and very high conversion efficiency is thus achieved.

FEATURES
■ High Voltage Startup
■ Power on Soft Start Reducing MOSFET Vds Stress
■ Frequency shuffling for EMI
■ Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power
■ Audio Noise Free Operation
■ Fixed 65KHZ Switching Frequency

[ … ]

OB5269 PDF File



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