OB221X series are offline PWM power switch ICs. They are designed for primary side regulation with minimum overall system cost by removing X/Y caps, Photo-coupler and TL431. They include an internal error amplifier to delivery high performance CC/CV control. OB2211/OB2212 is highly recommended for cost effective compact designs in low power adapter and battery charger applications.
Features:
◆ Primary side sensing and regulation eliminates TL431 and photo-coupler
◆ External adjustable gate drive capability
◆ Enable no-X and no-Y system design
◆ Low system cost
◆ Built-in error amplifier for CV/CC operation
◆ External adjustable CC operation
◆ Low standby power
◆ Frequency shuffling reduces EMI
◆ Available in DIP8 and SOP8 packages, RoHS compliant
Applications:
◆ CC/CV Battery Charger
◇ Cell/Cordless Phone Charger
◇ Digital Camera Charger
◇ PDA Charger
◆ Small Power Adapter
◆ Auxiliary Power for PC, TV etc.
◆ Linear Regulator/RCC Replacement
Device | MOSFET Rdson(ohm) | Package | Max Pout(W)note | Max Pout(W)(85~264V) | OB2211 | 12 | SOP8 | 7 | 4.5 | OB2211H | 12 | SOP8 | 10 | 5 | OB2212 | 12 | DIP8 | 16 | 9 | OB2211 | 5 | DIP8 | 20 | 12 |
Note: Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50°C ambient, 230Vac input.
Typical Application:
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