OB2535 is a high performance offline PWM Power switch for low power AC/DC charger and adapter applications. It can achieve ±5% precision constant voltage (CV) and high precision constant current (CC). It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated.
Features:
◆ ±5% constant voltage regulation at universal AC input
◆ Primary-side sensing and regulation without TL431 and opto-coupler
◆ Programmable CV and CC regulation
◆ Adjustable constant current and output power setting
◆ Built-in primary winding inductance compensation
◆ Programmable cable dro compensation
◆ Power on soft-start
◆ Built-in leading edge blanking (LEB)
◆ Cycle-by-Cycle current limiting
◆ VDD under voltage lockout with hysteresis (UVLO)
◆ VDD OVP
◆ VDD clamp
◆ Available in 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) | Frequency | OB2531 | External | SOT23-6 | -- | -- | 95kHz | OB2532 | External | SOT23-6 | -- | -- | 60kHz | OB2535/E | 12 | SOP8 | 10 | 5 | 60kHz | OB2536/E | 12 | DIP8 | 16 | 9 | 60kHz | OB2538/E | 5 | DIP8 | 20 | 15 | 60kHz | OB2539 | 5 | DIP8 | 18 | 13 | 95kHz |
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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