Datasheet for On-Bright's OB2263N current mode PWM controller, optimized for offline flyback converters under 30W.
The OB2263N is a current mode PWM controller designed for offline flyback converters in sub-30W applications. It features frequency shuffling for improved EMI performance, burst mode for low standby power, and internal slope compensation for stability. The device includes protection features like cycle-by-cycle current limit, UVLO, and gate voltage clamp. It operates with low startup and operating current, and supports external frequency programming.
The datasheet details pin configuration, electrical characteristics, and application circuits. It specifies operating parameters such as voltage ranges, temperature limits, and frequency stability. Package options include SOT23-6 and DIP8, with thermal ratings provided for each.
| Supply Voltage | 10 to 30 V |
|---|---|
| Operating Temperature | -40 to 150 ℃ |
| Startup Current | 3 to 20 µA |
| Operating Current | 1.4 mA |
| PWM Frequency | 60 to 70 kHz (at 100KΩ RI) |
| Package | SOT23-6 or DIP8 |
| Gate Output Clamp Voltage | 18 V |
| Frequency Shuffling Range | ±3% of base frequency |
The operating current is 1.4 mA at VDD=16V, RI=100Kohm, VFB=3V.
The gate output is clamped to a maximum of 18V to protect the power MOSFET.
The PWM switching frequency is externally programmable and typically 65 kHz at 100KΩ RI.
The OB2263N is available in SOT23-6 and DIP8 packages.