The Original AP8012 Off-Line SMPS Primary Switch Mode Power Management IC is an integrated high-voltage offline PWM power switch controller manufactured by Chipown. Encapsulated in an industry-standard DIP-8 through-hole package, it combines an optimized current-mode pulse-width modulation (PWM) controller with a rugged 800V high-voltage power MOSFET on a single monolithic silicon die. Operating at a fixed 60 kHz switching frequency with internal frequency jittering for low EMI, the AP8012 is designed for isolated flyback or non-isolated buck/buck-boost converters delivering up to 6W to 9W in enclosed adapters (and up to 13W in open-frame designs) across a wide 85V–265V AC universal mains input. It incorporates comprehensive built-in protections including cycle-by-cycle over-current protection, under-voltage lockout (UVLO), VDD over-voltage protection, and auto-restarting thermal shutdown, making it a reliable solution for small household appliance power supplies, smart meters, standby auxiliary converters, and AC-DC adapters (commonly used as a pin-compatible equivalent or alternative to the VIPer12A series).

Specifications

• Part Number / Model: AP8012 / AP8012H / AP8012C
• Manufacturer: Chipown
• Device Function: Integrated Offline Primary Switcher / PWM Controller with Built-in 800V Power MOSFET
• Package Type: DIP-8 
• Integrated Power MOSFET Breakdown Voltage (BVDSS): Min. 800 V
• Input AC Supply Voltage Range: Universal 85V to 265V AC (50Hz / 60Hz) or 100V to 375V DC
• Maximum Continuous Output Power:
  • Enclosed Adapter (85V–265V AC): 6 W to 9 W
  • Open Frame / 230V AC Input: Up to 12 W to 13 W Continuous (18 W Peak)
• Internal PWM Switching Frequency (fSW): Typ. 60 kHz (with built-in EMI Frequency Modulation)
• Startup Threshold Voltage (VDD_ON): Typ. 14.5 V to 15.5 V
• Undervoltage Lockout Threshold (VDD_OFF): Typ. 8.0 V to 9.0 V
• VDD Operating Voltage Range: 9.0 V to 38 V DC
• Primary Peak Current Limit (ILIM): Typ. 0.8 A
• Standby Power Consumption: < 100>
• Operating Junction Temperature (Tj): -40°C to +150°C
• Thermal Shutdown Temperature (TSD): Typ. 150°C (with auto-restart hysteresis)
• Pinout Configuration (DIP-8):
  • Pin 1: SOURCE (Source Terminal of Internal Power MOSFET / Power Ground Reference)
  • Pin 2: SOURCE (Source Terminal of Internal Power MOSFET)
  • Pin 3: FB (Feedback Input - Optocoupler collector / Voltage divider interface)
  • Pin 4: VDD (Auxiliary Supply Voltage & Startup Input)
  • Pin 5: DRAIN (High-Voltage Drain of Internal 800V Power MOSFET)
  • Pin 6: DRAIN (High-Voltage Drain of Internal 800V Power MOSFET)
  • Pin 7: DRAIN (High-Voltage Drain of Internal 800V Power MOSFET)
  • Pin 8: DRAIN (High-Voltage Drain of Internal 800V Power MOSFET)

Features

• Integrated 800V Avalanche-Rugged MOSFET: Built-in 800V high-voltage power transistor easily handles mains line surges and flyback inductive spikes without requiring oversized snubber networks.
• Internal Frequency Jittering: Jitters the 60kHz switching frequency to spread EMI energy, simplifying input EMI filter design and lowering overall bill-of-materials cost.
• Ultra-Low No-Load Standby (<100mW>
• Built-in High-Voltage Startup Circuit: Charges the auxiliary VDD capacitor directly from the high-voltage bus during startup, eliminating costly high-voltage bleed resistors.
• Complete Fault Protection Suite: Includes VDD over-voltage protection (OVP), cycle-by-cycle over-current protection (OCP), open-loop protection, and auto-restarting thermal shutdown (TSD).
• VIPer12A Pin Compatibility: Follows industry-standard pinouts for easy PCB drop-in replacement or redesign in small SMPS boards.

Common Applications

• Home Appliance Auxiliary Supplies: Microcontroller and relay power supplies for air conditioners, washing machines, rice cookers, and induction cooktops.
• Smart Meters & IoT Gateways: Wide-input offline DC auxiliary supplies for electricity meters and industrial smart sensors.
• AC-DC Wall Adapters & Chargers: 5V/1A, 5V/2A, and 12V/1A battery chargers, LED drivers, and set-top box power supplies.
• Standby Power Supplies: Auxiliary sub-supplies for audio receivers, LED TVs, and desktop PC power units.

Usage Tips

• Primary RCD Snubber Clamping: Always include an **RCD snubber network (e.g., FR107 / US1M fast-recovery diode, 1kV ceramic capacitor, and damping resistor)** across the primary transformer winding to clamp peak leakage inductance spikes safely below 800V.
• VDD Auxiliary Electrolytic Sizing: Connect a **10µF to 22µF (50V rated) low-ESR electrolytic capacitor** in parallel with a **100nF ceramic capacitor** close between Pin 4 (VDD) and Pins 1/2 (SOURCE) to sustain operating voltage during startup and load transients.
• PCB Creepage and Clearance: Maintain at least **3.0mm to 4.0mm creepage clearance** on the PCB layout between the high-voltage DRAIN pins (Pins 5, 6, 7, 8) and the low-voltage control pins (Pins 1, 2, 3, 4) to comply with AC mains safety insulation rules.
• Heatsinking via Drain Copper Pour: Tie Pins 5, 6, 7, and 8 together on the PCB and route them to a generous top/bottom copper pour area to maximize heat dissipation from the internal 800V power MOSFET.

Datasheet