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KP311AWPA
KP311AWPA
| Part Number | KP311AWPA |
|---|---|
| Manufacturer | Kiwi Instruments Co., Ltd. |
| Category | Integrated Circuits (ICs) > PMIC – AC DC Converters, Offline Switchers |
| Description | Highly integrated, non-isolated buck offline PWM power switch controller with internal 500V power MOSFET, delivering ultra-low standby power and constant voltage output for small home appliances. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The KP311AWPA is a high-performance non-isolated buck offline PWM power switch controller from Kiwi Instruments. This single-chip IC integrates a 500V internal power MOSFET and peak-current PWM/PFM multi-mode control, dedicated to small home appliances and smart IoT auxiliary power supplies.
It delivers stable constant voltage output with no-load standby power below 50mW. Adopting primary-side feedback (PSR), it removes optocouplers, TL431 and auxiliary transformer windings to cut BOM cost and simplify PCB layout. Packaged in compact ASOP-7 SMD, it comes with full auto-recovery protection circuits, a cost-effective power core for household control modules and white goods.
Core Advantages
Extreme External Layout Simplification
Requires no optocouplers, TL431 reference nodes, or auxiliary bias windings, drastically shrinking the overall bill of materials (BOM), lowering system cross-talk vectors, and maximizing PCB area utilization.
Ultra-Low Standby System Loss
Leverages built-in high-voltage startup circuitry and specialized low-consumption standby controllers to easily meet stringent international energy regulations, achieving a no-load standby loss profile beneath 50mW.
Integrated Frequency Jittering for EMI Suppression
Incorporates an active internal frequency hopping mechanism that spreads the electromagnetic interference spectral density across multiple bands, allowing compliance with global EMI standards using simplified filtering layouts.
Comprehensive Protective Safety Matrix
Features embedded safety layers including cycle-by-cycle overcurrent protection (OCP), overtemperature thermal shutdown (OTP), under-voltage lockout (UVLO), output short-circuit protection (SCP), overload protection (OLP), abnormal overcurrent protection (AOCP) and leading edge blanking (LEB), with auto-recovery logic after fault removal.
Key Specifications
| Brand | Kiwi Instruments |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free / Green Molding Standards |
| EDA/CAD Model | 3D CAD Step Models, Schematic Symbols & Footprints available upon request |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | ASOP-7-150mil (SOP-7) |
| Mounting Type | Surface Mount SMD |
| Surface Marking / Silkscreen | KP311AWPA Marking |
| Circuit Topology Class | Non-Isolated Buck Offline Switching Core |
| Internal MOSFET Breakdown Voltage (VDS) | 500 V Minimum Threshold Rating |
| Maximum Output Current Capacity | Up to 100 mA Continuous Output (Limited by internal power MOSFET rating) |
| Nominal Operational Switching Frequency | Adjustable/Adaptive Multi-Mode Regulation up to 31 kHz Typical |
| Standby Power Dissipation | < 50 mW at 230 V AC No-Load Input Baseline |
| Fixed Internal Output Targets | Configurable internal feedback metrics supporting stable low-voltage rails (e.g., 5V / 12V configurations) |
| Operating Junction Temperature Window | -40°C to +125°C (Industrial/Household Grade Operating Thermal Profile) |
| Input Voltage Range (AC) | 85 VAC ~ 264 VAC Full Universal Mains Input |
| HV Startup Current | Internal High-Voltage Startup Circuit, No External Startup Resistor Required |
| Control Mode | Peak Current Mode Control with PWM/PFM Multi-Mode Switching |
| EMI Optimization | Built-in Frequency Jitter Function to Reduce Conducted & Radiated EMI |
| Protection Functions | Cycle-by-cycle OCP, OTP Thermal Shutdown, UVLO, SCP Short-Circuit, OLP Overload, AOCP Abnormal Overcurrent, LEB Leading Edge Blanking, Auto-Recovery After Fault Removal |
| Feedback Scheme | Primary-Side Regulation (PSR), No Optocoupler & TL431 Needed |
| Storage Temperature Range | -55°C ~ +150°C |
| Tape & Reel Packaging Spec | 3,000 Units per Standard 7-inch Tape Reel |
Typical Applications
- Small Domestic Home Appliances (Electric Rice Cookers, Coffee Makers, Induction Cooktops)
- Smart Home IoT Standby Power Boards, Smart Wall Switches, and Intelligent Receptacles
- Industrial Linear Regulator Replacements and Auxiliary Non-Isolated Bias Power Rails
- LED Lighting Driver Auxiliary Modules and Smart Electric Utility Power Meters
- Electric Shifter Controllers, Smart Thermostats, and Residential HVAC Control Subsystems
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: Is your currently available stock of the KP311AWPA power switch 100% genuine and original?
A: Yes, we guarantee that all KP311AWPA chips in our inventory are 100% brand-new, factory-original products directly from Kiwi Instruments. Every shipment undergoes internal lot tracking audits and is dispatched in compliance with strict antistatic ESD packaging safety criteria.
Q2: What is the main structural advantage of a non-isolated buck switcher over a standard isolated flyback configuration?
A: Non-isolated switcher topologies like the one powered by the KP311AWPA eliminate the need for a bulky, customized multi-winding isolation transformer, opting instead for a standard, low-cost power inductor. This significantly reduces overall physical dimensions and cuts manufacturing costs, making it ideal for low-power consumer electronics that don’t require user-facing electrical isolation blocks.
Q3: How does the KP311AWPA handle electromagnetic interference (EMI) challenges during operation?
A: The KP311AWPA includes built-in frequency jittering circuitry. By constantly sweeping the switching frequency slightly around its nominal value, the IC spreads the localized peak RF energy across a broader spectrum. This greatly suppresses peak EMI signatures and minimizes the cost and footprint of the required external EMI filter network.
Q4: How can our hardware development group request an official PDF data guide, reference schematic layouts, or request tiered volume quotes?
A: Please complete the Quick Inquiry web form found on this product profile presentation. Our localized technical application desk will process your inquiry details and respond with a complete set of engineering assets within 24 hours.
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