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FAN4800AMY
onsemi
IC PFC CTLR CCM/DCM 84KHZ 16SOIC
1909 Pcs New Original In Stock
PFC IC Continuous Conduction (CCM), Discontinuous Conduction (DCM) 66kHz ~ 84kHz 16-SOIC
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5.0 / 5.0
- (21 Ratings)
FAN4800AMY
Product Overview
7825818
DiGi Electronics Part Number
FAN4800AMY-DGManufacturer
onsemi
FAN4800AMY
Description
IC PFC CTLR CCM/DCM 84KHZ 16SOICInventory
1909 Pcs New Original In Stock
PFC IC Continuous Conduction (CCM), Discontinuous Conduction (DCM) 66kHz ~ 84kHz 16-SOIC
Quantity
Minimum 1
Minimum 1
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365 - Day Quality Guarantee - Every part fully backed.
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FAN4800AMY Technical Specifications
Category
Power Management (PMIC), PFC (Power Factor Correction)
Packaging
-
Series
-
Product Status
Obsolete
Mode
Continuous Conduction (CCM), Discontinuous Conduction (DCM)
Frequency - Switching
66kHz ~ 84kHz
Current - Startup
100 µA
Voltage - Supply
11V ~ 16.5V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.154", 3.90mm Width)
Supplier Device Package
16-SOIC
Base Product Number
FAN4800
Datasheet & Documents
HTML Datasheet
FAN4800AMY-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
FAN4800AMYDKR
FAN4800AMYTR
FAN4800AMYCT
Standard Package
2,500
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
배송 속도가 빠르고, 고객센터가 친절하게 안내해줘서 매우 만족스럽습니다.
de desembre 02, 2025
Qualität steht bei DiGi Electronics an erster Stelle. Ich bin sehr zufrieden mit meinen Einkäufen.
de desembre 02, 2025
Their friendly customer support team makes troubleshooting straightforward and hassle-free.
de desembre 02, 2025
Their commitment to diversity and price transparency makes every shopping experience positive.
de desembre 02, 2025
DiGi Electronics offers a trustworthy shopping environment with great customer support.
de desembre 02, 2025
The company's approach to inventory control helps us reduce waste and optimize costs.
de desembre 02, 2025
Their team responds swiftly to after-sales support requests, demonstrating true professionalism.
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Frequently Asked Questions (FAQ)
Can the FAN4800AMY be safely used as a drop-in replacement for the FAN4800AUM in an existing PFC design operating in mixed CCM/DCM mode?
While the FAN4800AMY and FAN4800AUM share nearly identical electrical characteristics and pinouts, the FAN4800AMY is marked as obsolete by onsemi, which introduces supply chain and long-term reliability risks. Although they are functionally compatible in most CCM/DCM PFC applications, subtle differences in internal gate drive strength or soft-start timing—not always captured in datasheets—can affect startup behavior under low-line or light-load conditions. Before committing to a drop-in replacement, validate startup transients, loop stability, and overcurrent protection response on a prototype board. If redesigning, consider migrating to the active FAN4800AUM or newer alternatives like the FAN4803A for better support and longevity.
What are the key reliability risks when designing with the FAN4800AMY given its obsolete status and MSL 1 rating?
The primary risk with the FAN4800AMY stems from its obsolete status, which increases the likelihood of counterfeit or degraded stock despite being labeled 'new original.' Although its MSL 1 (unlimited floor life) simplifies handling, long-term availability cannot be guaranteed, jeopardizing production continuity. Additionally, obsolete parts may lack updated reliability data or application support from onsemi. To mitigate risk, source only from authorized distributors with traceable lot codes, perform incoming inspection for marking consistency and package integrity, and maintain a second-source strategy using the FAN4800AUM or pin-compatible modern PFC controllers such as the UCC28056 from TI.
How does the FAN4800AMY’s 66kHz–84kHz switching frequency range impact EMI filter design and efficiency in a 230VAC offline PFC stage?
The FAN4800AMY’s variable frequency operation across 66kHz to 84kHz complicates EMI filter design because conducted emissions must be suppressed over a broader spectrum compared to fixed-frequency controllers. This often necessitates larger common-mode chokes and X-capacitors to meet CISPR 32 Class B limits, increasing BOM cost and board space. Additionally, operating near the upper end of the frequency range increases switching losses in the boost MOSFET and diode, reducing efficiency—especially at high loads. To optimize, use frequency dithering-aware filter topologies and select low-Qg MOSFETs (e.g., 600V CoolMOS P7) to balance EMI and conduction losses. Always validate emissions with a pre-compliance scan across the full load range.
Is the FAN4800AMY suitable for high-reliability industrial applications requiring operation at 125°C ambient, and what derating considerations apply?
Although the FAN4800AMY is rated for -40°C to 125°C junction temperature, operating near the upper limit in a 125°C ambient environment leaves minimal thermal headroom, risking thermal shutdown or accelerated degradation. The controller’s internal reference and error amplifier performance can drift at extreme temperatures, potentially affecting output regulation and loop stability. For industrial use, ensure the PCB layout includes adequate copper pour for thermal dissipation and consider forced airflow. Derate the maximum duty cycle and monitor VCC supply stability, as internal bias currents increase with temperature. For mission-critical systems, evaluate more robust alternatives like the FAN4803A, which offers enhanced thermal performance and active status.
What design trade-offs should I consider when replacing the FAN4800AMY with a modern PFC controller like the UCC28056 in a legacy power supply?
Replacing the FAN4800AMY with a modern controller such as the UCC28056 offers benefits like higher efficiency, integrated protection features, and active manufacturer support—but introduces compatibility challenges. The UCC28056 uses a different control algorithm (transition-mode with valley switching), which may require redesigning the feedback compensation network and adjusting the current sense circuitry. Additionally, gate drive levels and timing parameters differ, potentially affecting MOSFET selection and dead-time optimization. While the UCC28056 supports lower standby power and better light-load efficiency, it may increase BOM complexity due to additional external components. Conduct a full loop stability analysis and thermal validation before transitioning, and consider whether the performance gains justify the redesign effort for your application.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
FAN4800AMY CAD Models
onsemi FAN4800AMY PCB symbols & footprints
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