AP3304 Multi-Mode PWM Controller

The AP3304 from Diodes Incorporated is a peak-current control, multi-mode (QR+CCM) PWM controller optimized for high-performance, low standby power, and cost-effective offline flyback converters. At no load or light load, the IC will enter Burst Mode® to minimize standby power consumption. The minimum switching frequency is set to avoid audible noise. When the load increases, the IC will enter QR mode with frequency foldback to improve system efficiency and EMI performance. The maximum switching frequency of about 100 kHz is set to clamp the QR frequency to reduce switching power loss. Furthermore, the frequency dithering function is built-in to reduce EMI emission and internal piecewise linear-line compensation ensures constant output power limit over the entire universal line voltage range. Comprehensive protection features, such as brownout protection, cycle-by-cycle current limit (OCP), V_CC overvoltage protection (VOVP), secondary-side output OVP (SOVP) and UVP (SUVP), internal OTP, overload protection (OLP), and pins fault protection are included. The AP3304 is available in a SOT26 package type.

Features

• Multi-mode of operations
  • Improves efficiency across all load levels:
    • QR mode at high-line voltage and CCM mode at low-line voltage
• 60 V process of V_CC pin for wide range output application
  • Lowers BOM (bill of materials) quantity and simplifies system design for USB PD applications
• AC input brownout protection (BNO)
  • Protects system from damage due to ultra-low-line conditions
• Available in SOT26 package type