OB2281AMP
Product Description
OB2281 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications.
PWM switching frequency at normal operation is internally fixed and is trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved.
VCC low startup current and low operating current contribute to a reliable power on startup and low standby design with OB2281.
OB2281 offers comprehensive protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), and VCC under voltage lockout (UVLO). It also provides the protections with latched shut down including over temperature protection (OTP), and over voltage protection (OVP). Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique.
The tone energy at below 25KHz is minimized in the design and audio noise is eliminated during operation.
OB2281 is offered in SOT23-6 package.
FEATURES
Power on soft start reducing MOSFET Vds stress
Frequency shuffling for EMI
Extended burst mode control for improved efficiency and low standby power design
Audio noise free operation
Over power operation with increased frequency
Comprehensive protection coverage
VCC Under Voltage Lockout with hysteresis (UVLO)
VCC Over Voltage Protection (VCC OVP)
Cycle-by-cycle over current threshold setting for constant output power limiting over universal input voltage range
Over Load Protection (OLP) with auto-recovery
External (if NTC resistor is connected at PRT pin)or internal Over Temperature Protection (OTP) with latched shut down
Output Over Voltage Protection(Output OVP) with latched shut down, and the OVP triggered voltage can be adjusted by the resistor connected between auxiliary winding and PRT pin
Output diode short protection with auto-recovery
APPLICATIONS
Offline AC/DC flyback converter for
Printer, Storage power supply
Power Adapter
When you order from opencartworks.com, you will receive a confirmation email. Once your order is shipped, you will be emailed the tracking information for your order's shipment. You can choose your preferred shipping method on the Order Information page during the checkout process.
The total time it takes to receive your order is shown below:
The total delivery time is calculated from the time your order is placed until the time it is delivered to you. Total delivery time is broken down into processing time and shipping time.
Processing time: The time it takes to prepare your item(s) to ship from our warehouse. This includes preparing your items, performing quality checks, and packing for shipment.
Shipping time: The time for your item(s) to tarvel from our warehouse to your destination.
Shipping from your local warehouse is significantly faster. Some charges may apply.
In addition, the transit time depends on where you're located and where your package comes from. If you want to know more information, please contact the customer service. We will settle your problem as soon as possible. Enjoy shopping!