OB2263 Current Mode PWM IC – SOT23-6 Flyback Controller

OB2263 Current Mode PWM Control IC – Offline Flyback Controller (SOT23-6)

The OB2263 is a highly integrated current-mode PWM controller designed for offline flyback converters up to 30 W. Housed in a compact SOT23-6 package, it is widely used in standby supplies and auxiliary rails on crypto-miner PSUs and hashboards. Its built-in frequency shuffling technology spreads switching-noise energy across a wider band, improving EMI performance without external filtering components.

Low-Standby & Audio-Noiseless Operation

In light-load or no-load conditions the OB2263 enters an extended burst mode that cuts standby power consumption to a minimum — important for PSU designs targeting efficiency benchmarks. The burst-mode threshold is tuned to keep the switching frequency above the audible range, so there is no transformer whine during standby.

Comprehensive On-Chip Protection

The IC includes cycle-by-cycle overcurrent protection (OCP), overload protection (OLP) with auto-recovery, VDD overvoltage clamping, and under-voltage lockout (UVLO). These safeguards protect both the controller and the downstream power components during fault events, reducing the chance of cascading failures on the board.

OB2263 PWM IC Specifications

Related PWM Controllers & Power ICs

• OB2268CP PWM IC – Whatsminer P222B PSU
• OB2276CP PWM IC – Whatsminer Power Management
• NCP1252A Current Mode PWM Controller
• FA5527 Switching Power Supply Control IC

Need flyback controller ICs for a PSU repair batch? Contact us at contact@lys-sz.com for volume pricing.

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