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Diodes Incorporated AP3917DS7-13
- Part No.:
- AP3917DS7-13
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
AP3917DS7-13.pdf
- Description:
- IC OFFLINE SWITCH MULT TOP 7SO
- Quantity:
- Payment:
- Shipping:
Inventory:10,076
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Product details
Overview
AP3917DS7-13 from Diodes Incorporated is a universal AC-input step-down power switcher integrating a 700V Power MOSFET in SO-7 package, designed for non-isolated buck and offline flyback topologies in home appliances and IoT devices. It delivers up to 300mA rated output current, achieves <30mW no-load power consumption with external bias, and features frequency modulation for EMI suppression.
For engineers reviewing the AP3917DS7-13 datasheet, AP3917DS7-13 pinout, AP3917DS7-13 application, or AP3917DS7-13 equivalent, key selection criteria include its 85–300VAC input range, ±5% constant voltage regulation, integrated OTP/OLP/SCP protection, and SO-7 thermal performance (θJA = 91°C/W).
Technical Context
The AP3917DS7-13 implements a self-supplied, current-mode PWM controller with internal 700V MOSFET and adaptive frequency reduction at light load. Its VBP supply is managed by an internal HV regulator with hysteresis (VBP_HVOFF = 8.5V, VBP_HVON = 8.2V) and latch-off restart at 4.5V.
Feedback regulation uses a 2.5V reference (VFB) with OLP trigger at 1.7V and open-loop detection at 60mV. Protection logic includes leading-edge blanking (250–400ns), thermal shutdown at +150°C, and short-circuit current limit set at 800mA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–300VAC universal - enables single-BOM design across global mains voltages without input selector switches. |
| Integrated MOSFET | 700V VDSS, 10.5Ω RDS(ON) - supports direct rectified AC input without external HV switch in buck/flyback. |
| Output Regulation | ±5% constant voltage - achieved via 2.5V FB reference with 1.7V OLP threshold and 60mV open-loop detection. |
| Peak Current Limit | 500mA typical - sets maximum inductor current; reduces linearly under light load to suppress audible noise. |
| No-Load Power | <30mW with external bias - meets stringent standby energy requirements for CE/ERP Tier 2 compliance. |
| Thermal Shutdown | +150°C junction temperature - latches off until VBP drops to 4.5V, enabling safe thermal recovery. |
| Package | SO-7 - provides 91°C/W junction-to-ambient thermal resistance on 2oz FR-4 with 1in² copper area. |
Pinout & Package
AP3917DS7-13 is housed in a moisture-sensitive SO-7 package (MSL Level 3), with matte tin-plated leads compliant to JESD22-B102 Method 208. The package features 7 terminals: two NC pins (1,2), dual-source S pins (3,4), BP (5), FB (6), and Drain (7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 NC | Not Connected Internally | Recommended to tie to Source for improved heat dissipation; no electrical function. |
| 3, 4 S | MOSFET Source / Ground Reference | Common return for BP and FB; serves as power ground and thermal path to PCB copper. |
| 5 BP | Bypass Capacitor Connection | External capacitor powers internal control circuit; HV regulator toggles between 8.2V (ON) and 8.5V (OFF). |
| 6 FB | Feedback Input | Monitors output via resistor divider; triggers switching at 2.5V and OLP at 1.7V. |
| 7 Drain | High-Voltage MOSFET Drain | Connects directly to rectified AC input; withstands 700V transient stress. |
Key Features
| Feature | Design Value |
|---|---|
| Universal AC Input Support | Operates across 85–300VAC without input voltage sensing or configuration - eliminates auxiliary sensing circuitry. |
| Adaptive Frequency Modulation | Switching frequency decreases with load - maintains high efficiency down to milliwatt-level standby while avoiding audio-band noise. |
| Multi-Fault Protection Suite | OTP (+150°C), OLP (170ms delay), SCP (800mA threshold), open-loop (60mV), and UVLO - enables robust unattended operation. |
| Low Standby Power Architecture | <30mW no-load consumption with auxiliary VBP supply - meets EU ERP Stage 2 and Energy Star requirements. |
| SO-7 Thermal & Assembly Compatibility | 91°C/W θJA, MSL Level 3, matte tin leads - supports automated reflow and industrial thermal cycling reliability. |
Applications
| Non-Isolated Home Appliances | IoT Edge Devices |
|---|---|
|
Use Scenario: AC-powered kitchen appliances requiring compact, low-cost, non-isolated DC supplies. IC Role / Device Role / Timing Role: Primary-side power switcher controlling buck topology with single-winding inductor. Use Value: Eliminates transformer and optocoupler; enables <30mW standby in rice cookers and AC fans. |
Use Scenario: Battery-free smart sensors powered directly from AC mains or PoE-derived rails. IC Role / Device Role / Timing Role: Constant-voltage regulator providing stable 5V/12V for MCU, BLE radio, and sensor interface. Use Value: ±5% regulation and 170ms OLP delay prevent nuisance tripping during wireless burst transmission. |
| Industrial Auxiliary Supplies | Standby Power for Smart Meters |
|
Use Scenario: Low-power auxiliary rails for PLC I/O modules and motor drive control logic. IC Role / Device Role / Timing Role: Offline flyback controller delivering isolated 3.3V/5V from 240VAC line. Use Value: Integrated 700V MOSFET and 91°C/W SO-7 package support convection-cooled designs in sealed enclosures. |
Use Scenario: Always-on metering circuits requiring ultra-low standby power and long-term reliability. IC Role / Device Role / Timing Role: Primary-side regulated switcher powering real-time clock and communication ICs. Use Value: 4.5V restart threshold and thermal hysteresis ensure graceful recovery after overtemperature events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar universal AC-input step-down power switcher applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3927DS7-13 | Successor device with improved light-load efficiency, lower RDS(ON) (8.5Ω), and enhanced EMI performance. | Same SO-7 footprint and pinout; supports identical buck/flyback topologies with tighter CV tolerance (±3%). | Preferred for new designs due to extended lifecycle and higher efficiency at 10–50mA loads. |
| LNK3206G | Off-line switcher with integrated 725V MOSFET, but requires external feedback optocoupler and lacks adaptive frequency modulation. | Supports isolated flyback only; no native non-isolated buck capability or <30mW standby architecture. | Consider only when isolation is mandatory and system BOM allows extra components and higher standby loss. |
Compared with AP3927DS7-13, the AP3917DS7-13 offers proven field reliability but slightly higher RDS(ON) and less aggressive light-load optimization; versus LNK3206G, it eliminates optocoupler dependency and delivers superior no-load efficiency in non-isolated configurations.
Availability
AP3917DS7-13 is available at Aetrix Electronics and suitable for non-isolated home appliances, IoT edge nodes, and industrial auxiliary power supplies requiring stable component supply and long-lifecycle support.
Supply support for AP3917DS7-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, consumer, and computing markets.
The AP3917D belongs to Diodes' universal AC-input power switcher product line, engineered for cost-sensitive, space-constrained applications where transformerless buck or low-component-count flyback topologies are preferred.
FAQ
What is the recommended external bypass capacitor value for the BP pin?
A 10µF/25V low-ESR electrolytic capacitor is recommended for stable VBP regulation. The AP3917DS7-13's internal HV regulator charges this capacitor to 8.5V and discharges it during operation; larger values extend fault-restart timing but improve ripple rejection.
Can AP3917DS7-13 be used in isolated flyback configurations?
Yes - it supports both non-isolated buck and isolated flyback topologies. In flyback mode, the FB pin connects to an optocoupler-based secondary-side feedback network, and the BP capacitor is supplied from the auxiliary winding. No primary-side sensing is required.
How does the AP3917DS7-13 achieve <30mW no-load power consumption?
By combining ultra-low quiescent current (110–200µA IBP2), adaptive frequency reduction, and optional auxiliary VBP supply (via resistor R5 from output to BP), the device minimizes switching and bias losses during no-load conditions without compromising startup reliability.
Is AP3917DS7-13 pin-compatible with AP3927DS7-13?
Yes - both use identical SO-7 packaging and pin assignments (NC/NC/Drain/S/FB/BP/S). The AP3927DS7-13 is a direct drop-in replacement with improved specifications, including lower RDS(ON), tighter CV regulation, and enhanced EMI behavior.
AP3917DS7-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 700V
- Topology:
- Buck, Flyback
- Voltage - Start Up:
- -
- Voltage - Supply (Vcc/Vdd):
- 8.2V ~ 8.8V
- Duty Cycle:
- -
- Frequency - Switching:
- -
- Power (Watts):
- 1 W
- Fault Protection:
- Current Limiting, Open Loop, Over Load, Over Temperature, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 7-SO
- Mounting Type:
- Surface Mount
AP3917DS7-13 FAQ
1.How can I place an order for AP3917DS7-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3917DS7-13 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 AP3917DS7-13 reliable?
The price and inventory of AP3917DS7-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3917DS7-13 is usually 5 days.
3.What payment methods are accepted for AP3917DS7-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3917DS7-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3917DS7-13?
AP3917DS7-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3917DS7-13 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 AP3917DS7-13?
For technical support, including AP3917DS7-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3917DS7-13 requirements.
6.How does Aetrix verify that AP3917DS7-13 is sourced from the original manufacturer or authorized distributors?
All AP3917DS7-13 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 AP3917DS7-13 meets industry standards.
7.What is the process for return or replacement of AP3917DS7-13?
All AP3917DS7-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP3917DS7-13, 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 AP3917DS7-13 part is unused and in its original packaging.
Return procedure for AP3917DS7-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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