AP1661P-E1 - 14.5V 0.8A BCM PFC Controller | Diodes Inc.
MPN: AP1661P-E1 ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
AP1661P-E1 Overview
A power-factor-correction controller is a specialized power-management IC used in the hierarchy power supply control → PFC controller → AC/DC power conversion. In a boost PFC stage, it commands a switching power stage so that input current is drawn with a shape closer to the AC input voltage. That action reduces reactive current and helps the upstream system meet harmonic and power-factor targets while charging a downstream DC bus.
Verified source material identifies boundary-conduction mode, 14.5 V supply operation, 0.8 A output, -40°C to +85°C operation, an 8-DIP package, and RoHS compliance. The controller is intended for compact power-supply designs where active PFC is required, including offline AC/DC converters and boost pre-regulators. Its through-hole package supports conventional PCB assembly rather than a surface-mount land pattern.
The AP1661 family is associated with a BCM operating approach, allowing the power stage to conduct for a controlled interval during each switching cycle. This can reduce switching losses compared with continuous-conduction operation over part of the operating range, although actual efficiency depends on the switch, inductor, rectifier, input voltage, output voltage, and load. The controller does not provide the complete boost converter; external power-stage components are required.
A key design consideration is validating the complete PFC loop with the intended magnetics and switching components. Keep the high-current boost path compact and separate from sensitive control traces, provide suitable input and output capacitors, and verify startup, current-sense limits, gate-drive behavior, and thermal margin over the required line and load ranges. The controller’s -40°C to +85°C specification should be checked against the enclosure’s worst-case ambient temperature.
This product page combines verified AP1661P-E1 specifications, sourcing information, cross-reference results, and practical engineering guidance. It distinguishes verified values from unavailable manufacturer details and does not infer pricing, pin assignments, or electrical limits that were not supplied in the source data.
Drop-in alternatives for AP1661P-E1 — 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 AP1661P-E1 (same form factor and footprint) — differing in Mounting Type, Package Type, Configuration / Function, Lifecycle Status, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AP1661P-G1
✅ Drop-In📋 Reference alternative (not in catalog)
AP1661MTR-E1
✅ Drop-In✓ In Stock
$0.1235 / Unit
View Datasheet →AP1661M-G1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AP1661AP-G1
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →AP1661P-E1
✅ Drop-In✓ In Stock
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View Datasheet →AP1661P-E1 Maximum Ratings & Electrical Characteristics
| Product Type | Power Factor Correction (PFC) Controller |
| Control Mode | Boundary Conduction Mode (BCM) |
| Configuration / Function | Boost |
| Supply Voltage | 14.5 V |
| Output Current | 0.8 A |
| Startup Current | 50 µA |
| Operating Temperature | -40°C to +85°C |
| Package | 8-DIP |
| Package Type | SOIC, Other |
| Mounting Type | Through Hole |
| RoHS Status | RoHS Compliant |
| Lifecycle Stage | Active |
| Product Series | AP1661 |
| Manufacturer | Diodes Incorporated |
| Primary Application | PFC pre-converter |
AP1661P-E1 soic, other Pin Configuration Guide
Pin configuration for AP1661P-E1 (soic, other package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for AP1661P-E1.
Refer to the datasheet for full pin configuration.
Typical Applications
AP1661P-E1 is suitable for 6 applications: Offline AC/DC Boost PFC, Industrial Power-Supply Pre-Regulator, Consumer Power-Supply PFC Stage, Boost Pre-Converter for High-Voltage DC Buses, PFC-Enabled Telecom Power Supplies, Retrofitted Power-Supply Repair.
Offline AC/DC Boost PFC
The AP1661P-E1 fits an offline AC/DC boost pre-converter because the verified function is power-factor correction in boundary-conduction mode, with a 14.5 V supply rating and 0.8 A output rating. It controls an external switching stage rather than directly converting mains energy, so the boost MOSFET, inductor, rectifier, capacitors, and feedback network must be designed together. BCM operation can reduce conduction duration relative to continuous conduction in parts of the load range, but final efficiency and harmonic performance depend on the completed power stage and control-loop tuning. The -40°C to +85°C range also requires enclosure-temperature margin.
Recommended
Industrial Power-Supply Pre-Regulator
For industrial power-supply pre-regulation, the AP1661P-E1 provides an active PFC control function for a boost stage that shapes input current before the downstream DC bus is established. Its verified 0.8 A output rating is the relevant verified device-level figure, not a complete converter power rating. The external inductor and switch must be selected for the actual input/output voltage ratio, switching current, ripple target, and enclosure thermal conditions. Verify ripple current, surge tolerance, current-sense limits, and feedback stability against the manufacturer documentation before production.
Recommended
Consumer Power-Supply PFC Stage
The AP1661P-E1 can serve as the controller in a consumer AC/DC supply where active input-current shaping is required ahead of a main conversion stage. Its 8-DIP through-hole package is suitable for through-hole assembly and may simplify service or prototype construction compared with a fine-pitch surface-mount controller. The controller does not eliminate the need for input filtering, bridge rectification, boost magnetic design, safety-rated components, or output protection. Validate conducted emissions, power factor, line regulation, and standby behavior in the final appliance because those results depend on the complete system.
Recommended
Boost Pre-Converter for High-Voltage DC Buses
The AP1661P-E1 is applicable to a boost pre-converter used to raise and regulate an intermediate DC bus while improving input power factor. Its verified boundary-conduction-mode architecture provides the control basis for repeated switching cycles, while external power components determine the actual bus voltage and output current. Design the inductor for peak current, the MOSFET for switching stress, and the rectifier for reverse recovery and thermal loss. Because the supplied data does not include switching frequency or protection thresholds, those values must be taken from the current datasheet rather than estimated.
Recommended
PFC-Enabled Telecom Power Supplies
The AP1661P-E1 may be evaluated for PFC-enabled telecom-style power-supply front ends where a corrected input-current profile is desired ahead of a regulated DC output. The available 0.8 A output specification should not be interpreted as the final converter current without checking the external stage and operating conditions. A telecom-oriented design must add appropriate input surge protection, hold-up energy, redundancy strategy, thermal monitoring, and regulatory testing. The through-hole 8-DIP package can assist prototype or repair work, but production selection should rely on confirmed supply and lifecycle status.
Recommended
Retrofitted Power-Supply Repair
AP1661P-E1 is relevant to repair and redesign workflows for older through-hole PFC boards because the verified package is an 8-DIP through-hole part. The active lifecycle designation makes it a more defensible starting point than the listed obsolete AP1661P-G1, subject to confirming current distributor supply and the manufacturer datasheet. Before replacing a failed controller, inspect the switch, rectifier, current-sense network, feedback network, and boost inductor because a failed controller may be a symptom of broader power-stage damage. Confirm pin numbering and polarity on the actual board rather than relying only on the MPN.
Recommended
Recommended Products Summary
Engineering reference data for AP1661P-E1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AP1661P-G1 | AP1661MTR-E1 | AP1661M-G1 | AP1661AP-G1 |
|---|---|---|---|---|---|
| Product Type | Power Factor Correction (PFC) Controller | Power Factor Correction (PFC) Controller | AP1661 family PFC-related component | AP1661 family component | Power Factor Correction - PFC Series |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Package | 8-DIP | 8-DIP - same package classification | 8-DIP classification; mounting differs | 8-DIP classification; verify exact package | Package representation differs in supplied comparison |
Key Differentiators
- Verified active lifecycle status (vs AP1661P-G1)
- Verified through-hole mounting target (vs AP1661MTR-E1)
- Documented BCM boost-controller positioning (vs AP1661P-G1)
Design Notes
The AP1661P-E1 is a controller, not the complete boost PFC converter. Select the external MOSFET, inductor, rectifier, input/output capacitors, and current-sense network so that the actual converter rating—not the 0.8 A device specification alone—meets the load. The supplied data does not provide switching frequency or current-sense thresholds; obtain those values from the current manufacturer datasheet before selecting those parts.
Keep the AP1661P-E1 within the verified -40°C to +85°C operating-temperature range at the device location, not merely at the enclosure inlet. The through-hole 8-DIP package does not eliminate heat generated by the boost MOSFET, rectifier, inductor, and current-sense components. Validate the highest ambient temperature, startup inrush, sustained load, and worst-case line condition with thermal measurement or a documented estimated calculation.
Route the high-current boost loop compactly and keep it separate from feedback and gate-control traces. Place the controller’s decoupling and sensing connections away from the power-switch node, whose rapid voltage transitions can inject noise. Confirm the physical pin numbering and each pin function from the manufacturer datasheet before PCB release because the supplied sources identify an 8-DIP package but do not provide the pinout.
Do not treat AP1661P-G1 as an automatic replacement merely because it belongs to the AP1661 family; the supplied cross-reference identifies it as obsolete. Likewise, AP1661MTR-E1 is described as surface mount while AP1661P-E1 is through hole. Verify footprint, mounting, pin functions, lifecycle, and electrical limits before changing a production design.
Compliance Information
The supplied distributor specification identifies AP1661P-E1 as RoHS compliant. REACH, lead-free, halogen-free, conflict-minerals, and AEC-Q100 information was not provided, so those fields remain unknown or not applicable rather than inferred.
