Chip-Rail CR5269SSJ

CR5269S is a high-performance current-mode PWM controller with standby power consumption less than 75mW across the full voltage range, meeting Energy Efficiency Level VI standards. Multiple operating modes are integrated to reduce standby power consumption and improve efficiency. The device operates in three distinct modes according to load conditions, each individually optimized. Under heavy load, the system operates in conventional PWM mode. As the load decreases, the system transitions to PFM mode. In PFM mode, the switching frequency decreases gradually as the load continues to lighten. A proprietary frequency conversion module enables smooth reduction of switching frequency without generating noise. The reduction in frequency effectively minimizes switching losses. When the load drops below a preset threshold, the system enters PSM mode. In PSM mode, certain switching cycles are skipped with the switch fully turned off during those cycles, further reducing standby power consumption. Frequency dithering is integrated across all three operating modes to improve system EMI performance. The IC also integrates a dynamic maximum output power compensation module, ensuring a constant maximum output power point across the full AC input voltage range (90V~264V). Multiple functions and protection features are integrated, including UVLO, VDD OVP, soft-start, OTP, cycle-by-cycle OCP, OLP, SENSE pin open-circuit protection, GATE clamp, and leading-edge blanking.

• Meets Energy Efficiency Level VI standard, low startup and operating current
• PSM mode reduces standby power consumption, VDD overvoltage protection
• Built-in soft-start, overload protection
• Good EMI characteristics, cycle-by-cycle overcurrent protection
• Zero-noise operation, over-temperature protection
• Typical 65kHz switching frequency, output rectifier diode short-circuit protection
• Current mode control, four-pin heat dissipation
• Built-in slope compensation, SOP-8L green package

• Power adapters, auxiliary power supplies for computers and servers
• Open-frame power supplies, set-top box power supplies
• Power supplies for digital cameras and camcorders
• Handheld computer power supplies