OB2362 Current Mode PWM Control IC

OB2362 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications At full loading, the IC operates in fixed frequency (65KHz) mode. When the loading goes low, it operates in Green mode with valley switching for high power conversion efficiency. When the load is very small, the IC operates in ‘Extended Burst Mode’ to minimize the standby power loss. As a result, high conversion efficiency can be achieved in the whole loading range. VCC low startup current and low operating current contribute to a reliable power on startup and low standby design with OB2362. OB2362 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 frequenc y shuffling technique. The tone energy at below 23KHz is minimi zed in the design and audio noise is eliminated during operation. OB2362 is offered in SOT23-6 package

Key Features

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• Power on soft start reducing MOSFET Vds stress
• Multi-Mode Operation
• 65KHz fix
• frequency mode @ Full Load
• Valley switching operation @ Green mode
• Burst Mode @ Light Load & No Load
• Frequency shuffling for EMI
• Extended burst mode control for improved efficiency and low standby power design
• Audio noise free operation
• Comprehensive protection coverage
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• VCC Under Voltage Lockout with hysteresis (UVLO)
• VCC Over Voltage Protection (VCC OVP)

Applications

• Offline AC/DC flyback converter for
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• Power Adapter
• Set-Top Box Power Supplier
• Open-frame SMPS

Part Numbers and Specifications

Product family: On-Bright official page