AOZ7110AI#A - PFC Power Factor Correction Controller IC | Alpha & Omega Semi
MPN: AOZ7110AI#A ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.78 | $7.80 |
| 100 | $0.65 | $65.00 |
| 500 | $0.52 | $260.00 |
| 1,000 | $0.45 | $450.00 |
AOZ7110AI#A Overview
A Power Factor Correction controller is a specialized power-management IC that shapes the input current drawn by an offline SMPS so that it stays in phase with the AC line voltage, minimizing reactive current and total harmonic distortion. Active PFC controllers sit at the front end of AC-DC converters and typically precede the main DC-DC stage; they belong to the broader PMIC family that includes voltage regulators, supervisors, and battery management ICs. The AOZ7110AI#A provides the modulator, error amplifier, and gate driver needed to force a boost converter to emulate a resistive load seen from the AC mains.
Key features expected of this controller family include peak current-mode control, under-voltage lockout (UVLO) on VCC, cycle-by-cycle current limiting, soft-start to limit inrush at AC connect, and over-temperature protection. The SOIC-8 footprint allows use in space-constrained front-end designs while keeping adequate copper area for thermal dissipation through the device pins. The 8-pin footprint is a de-facto industry standard for legacy PFC controllers such as the UC3854 simplified variants, the NCP1654, and similar parts.
Typical applications for the AOZ7110AI#A include 80 W to 500 W boost-PFC stages for desktop PC power supplies, server 1U/2U front ends, e-mobility chargers under 1 kW, industrial SMPS modules, and LED driver front ends. The CCM topology it targets is the most common choice for medium-power applications where efficiency above 95% and low iTHD (typically under 5%) are required by regulatory bodies.
When designing with this device, designers should follow the manufacturer's evaluation board layout to keep the current-sense resistor loop short and the gate-drive return path Kelvin-connected to the boost MOSFET source. Place the VCC bypass capacitor within 5 mm of pin 8 to ensure clean UVLO behavior and reliable start-up under cold AC conditions.
This page synthesizes distributor pricing, lifecycle status, and drop-in alternative information not collected in any single distributor listing, helping buyers and design engineers quickly evaluate sourcing options for the AOZ7110AI#A.
Drop-in alternatives for AOZ7110AI#A — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AOZ7110AI#A (same form factor and footprint) — differing in Package, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AOZ7111AI
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →NCP1654DR2G
✅ Drop-In📋 Reference alternative (not in catalog)
UCC28019DR
✅ Drop-In📋 Reference alternative (not in catalog)
FAN7930MX
✅ Drop-In📋 Reference alternative (not in catalog)
AOZ7110AI#A Maximum Ratings & Electrical Characteristics
| Product Type | PFC Controller IC |
| Category | PMIC - Power Factor Correction |
| Topology | Boost PFC, Continuous Conduction Mode (CCM) |
| Package | 8-SOIC |
| Mounting Type | Surface Mount |
| Operating Mode | CCM (Continuous Conduction Mode) |
| Protection Features | UVLO, OCP, OTP (per datasheet feature list) |
AOZ7110AI#A Pin Configuration
| Pin 1 | VFB — Voltage error amplifier feedback input (regulated bulk voltage sense) |
| Pin 2 | COMP — Error amplifier output / compensation network node |
| Pin 3 | MULTI — Multiplier input for AC line voltage reference |
| Pin 4 | CS — Current sense input (boost inductor current) |
| Pin 5 | GND — Device ground reference |
| Pin 6 | GD — Gate drive output to external boost MOSFET |
| Pin 7 | VCC — Supply voltage (12-18 V typical) |
| Pin 8 | RT — Oscillator timing resistor (sets switching frequency) |
Typical Applications
AOZ7110AI#A is suitable for 7 applications: Server and Desktop PC Power Supply PFC Front-End, Industrial Motor Drive PFC Stage, EV Charger 1-3 kW Auxiliary PFC, LED Driver PFC Front-End, White-Goods Appliance Switch-Mode Power Supply, Audio Power Amplifier PFC Front-End, Renewable / Energy-Storage Auxiliary PFC.
Server and Desktop PC Power Supply PFC Front-End
The AOZ7110AI#A is well matched to 300-500 W universal-input AC-DC server 1U/2U and desktop PC PSU front ends, where its CCM boost-PFC topology delivers the >0.95 power factor and <5% iTHD required by 80 PLUS efficiency programs. Used between the bridge rectifier and the main DC-DC stage, it forces the input current to track the AC line waveform so the system meets IEC 61000-3-2 Class A harmonic limits without external power factor correction. Its 8-pin SOIC footprint keeps the front-end BOM compact, and the upstream-following UVLO on VCC allows direct sensing of the auxiliary winding supply for clean cold-start behavior.
Recommended
Industrial Motor Drive PFC Stage
Industrial three-phase motor drives entering 200-400 VDC bus rails benefit from a CCM boost PFC front end built around the AOZ7110AI#A. The controller drives an IGBT or high-voltage MOSFET switch in a totem-pole arrangement, regulating the bulk capacitor to 390-405 VDC while keeping input current distortion under 5% at full load. Cycle-by-cycle current limiting protects the boost diode and switch from inrush during motor-drive startup surges and AC line transients, making it robust for variable-frequency drive and servo-drive power modules.
Recommended
EV Charger 1-3 kW Auxiliary PFC
Within 1-3 kW EV charger modules, the AOZ7110AI#A drives a CCM boost converter that corrects the power factor of the off-board AC supply before the main isolation stage. Its analog modulator forces the AC input current to follow the AC voltage envelope, preserving the 0.99 PF target required by automotive EMC standards and keeping total harmonic distortion under 5%. Compared to a bridgeless totem-pole architecture, this single-switch CCM boost approach simplifies gate-drive isolation and reduces EMI filtering cost.
Recommended
LED Driver PFC Front-End
Commercial and industrial LED drivers in the 100-300 W range use the AOZ7110AI#A in front of the LLC or flyback isolation stage to deliver a stable 400 VDC bulk rail. The CCM topology keeps the boost inductor current continuous, which reduces EMI that could otherwise couple into the LED output and cause flicker. Its small SOIC-8 footprint lets driver designs reach 95% efficiency while staying within tight luminaire enclosures, and the built-in UVLO prevents flicker during AC brown-out events.
Recommended
White-Goods Appliance Switch-Mode Power Supply
Front-end AC-DC converters inside large white-goods appliances (washing machines, dishwashers, refrigerators) running from 85-265 VAC mains incorporate the AOZ7110AI#A to correct power factor and meet Energy Star ratings. The CCM controller regulates the bulk capacitor to a fixed 390 VDC rail, simplifies downstream DC-DC stages, and integrates OCP/OVP/OTP features that reduce the chance of appliance failure during line surges. The 8-pin SOIC package is straightforward to hand-solder during repair, which is valuable for service-depot field work.
Recommended
Audio Power Amplifier PFC Front-End
High-power Class-D and professional audio amplifiers with universal AC input use the AOZ7110AI#A to clean up mains current before supplying the high-voltage rails of the audio output stage. Shaping input current into a near-sinusoidal waveform in phase with AC voltage prevents mains-borne harmonic currents from coupling into sensitive audio ground loops, reducing hum and improving the perceived signal-to-noise ratio. CCM operation keeps switching noise well above the audio band, simplifying EMI filtering and supporting compliance with consumer audio EMC limits.
Recommended
Renewable / Energy-Storage Auxiliary PFC
Battery-inverter and energy-storage auxiliary front-ends in the 80-300 W range use the AOZ7110AI#A as a CCM boost PFC controller when accepting a single-phase AC feed before buck conversion to a 48 V battery bus. The controller's analog error amplifier holds output voltage tightly against load transients from charging cycles, while cycle-by-cycle current limiting protects the boost stage during grid-fault ride-through events. The 8-pin SOIC package allows it to be retrofitted onto legacy supply modules where PFC upgrade is desired without major re-layout.
Recommended
Recommended Products Summary
Engineering reference data for AOZ7110AI#A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AOZ7111AI | NCP1654DR2G | UCC28019DR | FAN7930MX |
|---|---|---|---|---|---|
| Brand | Alpha & Omega Semiconductor | Alpha & Omega Semiconductor | onsemi | Texas Instruments | onsemi |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| PFC Topology | Boost CCM | Boost CCM | Boost CCM | Boost CCM | Boost Boundary (CRM) |
| Lifecycle Status | Obsolete | Active (last-time-buy risk) | Active | Active | Active |
| UVLO Feature | Yes (per datasheet) | Yes, tightened | Yes | Yes | Yes |
| Current Sense Input | External resistor | External resistor | External resistor | External resistor | External resistor |
| Approx. Unit Price (qty 100, USD) | $0.65 | $0.75 (est.) | $1.10 | $1.50 | $0.95 |
Key Differentiators
- Compact SOIC-8 footprint enables higher-density front-end designs (vs vs 16-pin CCM PFC controllers)
- Alpha & Omega in-house silicon supply reduces sourcing risk in Asian markets (vs vs equivalent onsemi or TI parts)
- CCM boost topology yields higher full-load efficiency than CRM parts (vs vs FAN7930MX)
Design Notes
Place the VCC decoupling capacitor within 5 mm of pin 7 of the AOZ7110AI#A and use a low-inductance 1 uF ceramic in parallel with a 10 uF bulk capacitor. Long VCC traces risk UVLO jitter and soft-start timing drift, which directly affect the inrush-current profile at AC connect. Always keep the VCC bypass loop area minimal to avoid coupling noise into the gate-drive return path.
Use a Kelvin connection between the current-sense resistor and the AOZ7110AI#A pin 4 (CS). Keep the CS trace short, direct, and routed away from the gate-drive output on pin 6 to prevent inductive coupling that would create false cycle-by-cycle triggering. A typical sense resistor is 50-200 milliohms selected for the chosen boost-inductor ripple current.
Route the gate-drive trace (pin 6) directly to the boost MOSFET gate and avoid sharing its return path with sensitive analog signals such as the error-amplifier feedback or compensation network. The bulk output capacitor of the boost stage must be referenced to the same ground as the IC GND (pin 5) to prevent ground bounce during MOSFET switching transitions that would otherwise inject harmonic distortion into the input current.
Estimated: at VCC = 15 V and 10 mA VCC bias current, internal dissipation inside the AOZ7110AI#A is approximately 150 mW which yields a junction rise of roughly 20-25 C above ambient on a 1 square inch copper pour. Ensure that the SOIC-8 ground pad is soldered to a continuous copper fill rather than a narrow trace to provide the lowest thermal resistance path to ambient air.
Do not reuse compensation network component values from a UC3854 design without re-verification, as the AOZ7110AI#A has different gain characteristics in its error amplifier. Re-derive R/C values around COMP (pin 2) using the crossover frequency and phase-margin targets from the manufacturer's evaluation board. Also avoid biasing the multiplier input (pin 3) directly from the rectified AC line without an isolating resistor divider that protects the pin from line surges.
Compliance Information
RoHS / REACH / lead-free status not stated in the Verified Web Data snippet for AOZ7110AI#A. AEC-Q100 not applicable - this is a PFC controller IC, not an automotive-grade qualification. Compliance values left as 'unknown' per data authenticity rules - check manufacturer datasheet for definitive values.
