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Diodes Incorporated AP3101P-E1
- Part No.:
- AP3101P-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AP3101P-E1.pdf
- Description:
- IC PWM CONTROLLER SO-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,418
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Product details
Overview
AP3101P-E1 from BCD Semiconductor Manufacturing Limited is a green-mode current-mode PWM controller IC for off-line AC-DC adapters and battery chargers, featuring 60–70 kHz adjustable oscillator frequency (via RI pin), 30 µA start-up current, 3 mA operating current, and integrated skip-cycle mode for low standby power. It delivers cycle-by-cycle current limiting, leading-edge blanking, and accurate over-temperature protection with 25°C hysteresis.
For engineers reviewing the AP3101P-E1 datasheet, AP3101P-E1 pinout, AP3101P-E1 application, or AP3101P-E1 equivalent, key selection criteria include UVLO thresholds (16 V turn-on / 10 V turn-off), 0.85 V current-sense threshold, totem-pole gate drive (600 mA sink/source), and DIP-8 package compatibility with legacy flyback designs requiring high thermal robustness.
Technical Context
The AP3101P-E1 implements fixed-frequency current-mode control with automatic transition to skip-cycle mode under light load, reducing no-load power consumption. Its BiCMOS process enables ultra-low start-up (30 µA) and operating (3 mA) currents, supporting high-value start-up resistors and smaller VCC hold-up capacitors.
Internal architecture includes synchronized slope compensation for >50% duty-cycle stability, built-in 270 ns leading-edge blanking to suppress MOSFET turn-on spikes, and short-circuit protection with 23 ms delay and auto-restart after VCC dropout. The ADJ pin sets skip-level threshold via external resistor, enabling precise light-load efficiency tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 60–70 kHz (set by RI resistor; supports 50–100 kHz range) |
| Start-up Current | 30 µA (enables >1 MΩ start-up resistor at 85 VAC input) |
| Operating Current | 3 mA (reduces VCC capacitor size and dissipation) |
| UVLO Thresholds | 16 V turn-on / 10 V turn-off (ensures reliable startup and brownout recovery) |
| Current Sense Threshold | 0.85 V (defines peak switch current limit with ±5% tolerance) |
| Gate Drive Output | 600 mA sink/source (drives 1 Ω gate resistance with <350 ns rise/fall) |
| Over-Temperature Shutdown | 155°C with 25°C hysteresis (prevents thermal runaway in enclosed adapters) |
Pinout & Package
AP3101P-E1 is housed in an 8-pin DIP package (0.300" wide, 7.62 mm lead pitch), optimized for through-hole assembly and thermal dissipation in AC-DC adapter PCBs. Pinout matches industry-standard DIP-8 footprint with GND, FB, VIN, RI, ADJ, SENSE, VCC, and GATE terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Common return for internal bias, feedback, and sense circuits; must be low-impedance connection to primary-side ground |
| 2 FB | Feedback voltage input | Compares optocoupler output to set duty cycle; 3 kΩ input impedance enables direct connection to TL431-based error amplifiers |
| 3 VIN | Start-up current input | Sinks 30 µA to charge VCC capacitor from rectified line; high-impedance node minimizes standby loss |
| 4 RI | Oscillator timing resistor | Programs switching frequency via constant-current charging of internal capacitor; 26 kΩ yields 65 kHz nominal |
| 5 ADJ | Skip-cycle threshold adjust | Sets light-load entry point for green mode; voltage = VFB − 0.9 V; external resistor to GND defines threshold |
| 6 SENSE | Primary-side current sense | Monitors MOSFET source voltage; 200 ns blanking prevents false triggering on turn-on spike |
| 7 VCC | IC supply rail | Powered after startup; regulated internally to 12 V; UVLO protects against undervoltage operation |
| 8 GATE | Driver output | Totem-pole stage drives N-channel MOSFET gate; soft-start behavior reduces EMI during power-up |
Key Features
| Feature | Design Value |
|---|---|
| Green-mode skip-cycle operation | Reduces no-load power to <300 mW in 12 V/3 A adapter designs without auxiliary winding |
| Built-in synchronized slope compensation | Eliminates need for external ramp generator in continuous-conduction-mode flyback converters |
| Accurate over-temperature protection | 155°C shutdown with 25°C hysteresis ensures safe thermal margin in sealed enclosures |
| Low start-up and operating current | Enables use of 1.2 MΩ start-up resistor and 470 µF VCC capacitor in universal-input 85–265 VAC adapters |
| Integrated short-circuit protection | 23 ms delay before shutdown prevents nuisance tripping during transient overloads |
Applications
| USB-C Wall Adapter | Laptop AC Adapter |
|---|---|
Use Scenario: 5 V/3 A USB-C wall charger operating from 85–265 VAC input with <300 mW no-load consumption. IC Role / Device Role / Timing Role: Primary-side PWM controller managing flyback transformer switching, current sensing, and feedback regulation via optocoupler. Use Value: Skip-cycle mode and 30 µA start-up current meet DOE Level VI and EU CoC v5 standby requirements without auxiliary winding. | Use Scenario: 19.5 V/3.34 A laptop adapter with over-temperature and short-circuit protection for unattended operation. IC Role / Device Role / Timing Role: Current-mode controller providing cycle-by-cycle current limiting, synchronized slope compensation, and 23 ms short-circuit response. Use Value: Integrated OTP with 25°C hysteresis prevents thermal shutdown cycling during sustained 40°C ambient operation. |
| Smartphone Fast Charger | Industrial Battery Charger |
Use Scenario: 9 V/2 A fast-charging adapter using QR flyback topology with variable-frequency control. IC Role / Device Role / Timing Role: Green-mode PWM controller adjusting frequency and entering skip-cycle mode dynamically based on load and line voltage. Use Value: Adjustable RI resistor and ADJ pin enable optimization across 5–12 V output ranges while maintaining <75 mW standby. | Use Scenario: 24 V/2 A sealed lead-acid battery charger for industrial gateways with extended temperature operation. IC Role / Device Role / Timing Role: Primary-side controller implementing constant-current/constant-voltage charge profile with over-temperature foldback. Use Value: 150°C max junction temperature rating and DIP-8 package support operation up to 85°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar green-mode current-mode PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OB2262MP-H | Higher start-up current (50 µA), no ADJ pin for skip-level adjustment, fixed 65 kHz frequency | Lacks programmable skip-cycle threshold; requires external circuitry for light-load efficiency tuning | Select when cost sensitivity outweighs fine-grained green-mode control needs |
| SG6841Z | Integrated 650 V MOSFET, higher VCC UVLO (18 V/10 V), no slope compensation | Single-chip solution eliminates external MOSFET but limits max output power to ~15 W | Select for ultra-compact <10 W adapters where board space is critical |
Compared with OB2262MP-H and SG6841Z, AP3101P-E1 offers unique adjustability of both switching frequency (RI) and skip-cycle threshold (ADJ), enabling optimal efficiency across wide input/output ranges in 12–24 W AC-DC adapters without sacrificing thermal robustness or protection granularity.
Availability
AP3101P-E1 is available at Aetrix Electronics and suitable for USB-C wall adapters, laptop AC adapters, and industrial battery chargers requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for AP3101P-E1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC design house specializing in high-efficiency, high-reliability controllers and drivers for power conversion.
The AP3101 product line targets cost-sensitive, thermally constrained off-line SMPS applications-specifically AC-DC adapters and battery chargers-where low standby power, integrated protection, and DIP-8 manufacturability are critical.
FAQ
What is the recommended minimum value for the RI timing resistor?
The RI pin operates as a constant-current source charging an internal capacitor. For stable 60–70 kHz operation, BCD recommends 18–30 kΩ. Values below 12 kΩ risk excessive frequency drift and reduced skip-cycle accuracy due to internal current-source nonlinearity above 100 kHz.
Can AP3101P-E1 drive a 600 V MOSFET directly?
Yes-the GATE pin provides 600 mA sink/source capability and is rated for 30 V VCC, sufficient to fully enhance common 600 V superjunction MOSFETs (e.g., 7N60) with gate thresholds ≤4 V. External gate resistor (10–22 Ω) is still required to damp ringing and limit dV/dt.
How does the ADJ pin interact with the FB pin in skip-cycle mode?
The ADJ pin compares (VFB − 0.9 V) to its own voltage. When VFB drops below (VADJ + 0.9 V), the controller blanks output pulses. A 10 kΩ resistor from ADJ to GND sets default skip at ~1.2 V FB, matching typical TL431-based feedback networks.
Is the SENSE pin compatible with high-side current sensing?
No-the SENSE pin is designed exclusively for low-side (source) current sensing with referenced ground. High-side sensing requires external differential amplifier or isolated current sensor; the internal comparator expects negative-going pulses relative to GND.
AP3101P-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Isolation:
- Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- -
- Topology:
- Flyback
- Voltage - Start Up:
- 16 V
- Voltage - Supply (Vcc/Vdd):
- 10V ~ 20V
- Duty Cycle:
- 80%
- Frequency - Switching:
- 65kHz
- Power (Watts):
- -
- Fault Protection:
- Over Temperature, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-DIP
- Mounting Type:
- Through Hole
AP3101P-E1 FAQ
1.How can I place an order for AP3101P-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3101P-E1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP3101P-E1 reliable?
The price and inventory of AP3101P-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3101P-E1 is usually 5 days.
3.What payment methods are accepted for AP3101P-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3101P-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3101P-E1?
AP3101P-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3101P-E1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP3101P-E1?
For technical support, including AP3101P-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3101P-E1 requirements.
6.How does Aetrix verify that AP3101P-E1 is sourced from the original manufacturer or authorized distributors?
All AP3101P-E1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP3101P-E1 meets industry standards.
7.What is the process for return or replacement of AP3101P-E1?
All AP3101P-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3101P-E1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP3101P-E1 part is unused and in its original packaging.
Return procedure for AP3101P-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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