[PDF] What is OB2279 CONTROLLER? (811764)

The OB2279 is Current Mode PWM Controller made by On-Bright.

Brief overview of the content in a OB2279 PDF file

OB2279 Current Mode PWM ControllerFreq Shuffling with Latch Shutdown OB2279 is offered in SOP 8 and DIP 8 packages GENERAL DESCRIPTION OB2279 is a highl y integ rated current mode PWM control IC optimized fo r high performance low standby pow er and cost effe ctive offline fly back converter applications PWM switching frequenc y at norm al operation is externally programmable and trimmed to tigh t range At no load or light load condition t he IC operates in extended bu rst mode to minimize switching loss Lower stan dby p ower and high er conversion efficiency is thus achieved VDD low startup current and low operating curre nt contribute to a reliable po wer on startu p design with OB2279 A large value resistor could t hus be used i n the startup circuit for reduced power loss The internal slope com pensation im proves sy stem large signal stability and reduces the possible subharmonic oscillation at high PWM dut y cycle output Leading edge blankin g on current sense input removes the signal glitch du e to snubber circuit diode reverse r ecovery and greatly reduces the external component count and system cost in the design OB2279 offers co mprehensive protection coverage including Cy cle by Cycle current li miting OCP VDD Under Voltage Locko