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Diodes Incorporated AP2191DFMG-7
- Part No.:
- AP2191DFMG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2191DFMG-7.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,630
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Product details
Overview
AP2191DFMG-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with 2.1A current limiting, 90mΩ RDS(ON), and integrated output discharge. It delivers controlled 0.6ms rise time, reverse current blocking, and 7ms deglitched fault reporting for USB 2.0-compliant hot-swap applications in laptops and docking stations.
For engineers reviewing the AP2191DFMG-7 datasheet, AP2191DFMG-7 pinout, AP2191DFMG-7 application, or AP2191DFMG-7 equivalent, key selection criteria include enable polarity (active-high), thermal shutdown threshold (140°C), output discharge resistance (100Ω), and SO-8/MSOP-8/U-DFN2018-6 package compatibility with USB port power sequencing requirements.
Technical Context
The AP2191DFMG-7 implements a thermally protected, slew-rate-controlled high-side NMOS switch with integrated current sensing via a dedicated sense FET - eliminating external shunt resistors. Its UVLO circuit (1.9V typ) ensures turn-on only after stable input rail establishment.
It features dual-protection coordination: overcurrent detection triggers constant-current limiting at 2.1A (typ), while sustained faults activate thermal shutdown at 140°C with 25°C hysteresis. The open-drain FLG pin asserts low after 7ms deglitch for both overcurrent and overtemperature events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.1A typical - clamps output current during overload without shutdown, enabling safe hot-swap recovery |
| RDS(ON) | 90mΩ max (U-DFN2018-6, VIN=5V) - minimizes conduction loss and self-heating under 1.5A continuous load |
| Enable Polarity | Active-high - simplifies interface with host GPIOs that drive high to enable power delivery |
| Output Discharge | 100Ω internal path - discharges output capacitors rapidly upon disable, preventing backfeed and bus contention |
| FLG Blanking Time | 7ms typical - suppresses false fault reports during inrush or transient capacitive loading, no external RC needed |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 operating range including low-voltage battery-backed operation |
| Shutdown Current | 1µA max - enables ultra-low-power standby in portable systems with strict quiescent budget |
Pinout & Package
AP2191DFMG-7 is packaged in U-DFN2018-6 - a 2.0mm × 1.8mm, 0.5mm pitch, thermally enhanced leadless package with exposed pad for GND connection and improved θJA (70°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference and thermal pad anchor - must be soldered to PCB ground plane via thermal vias |
| 2 | IN | Main power input - connects to 2.7–5.5V source; requires local 0.1µF ceramic bypass |
| 3 | EN | Active-high enable control - driven high (>2V) to activate switch; pulled low to disable and engage discharge |
| 4 | FLG | Open-drain fault indicator - pulls low during overcurrent or overtemperature; requires external pull-up |
| 5, 6 | OUT | Switched output - supplies load; pins internally tied; supports up to 1.5A continuous with proper layout |
Key Features
| Feature | Design Value |
|---|---|
| Controlled Rise Time | 0.6ms typical - limits inrush current to <1.5A during hot-plug, reducing stress on upstream supply and connectors |
| Reverse Current Blocking | Active when disabled - prevents backflow from loaded output to input rail, critical for multi-rail USB hubs |
| Thermal Hysteresis | 25°C - enables automatic recovery after fault removal without external reset logic or manual intervention |
| UVLO Threshold | 1.9V typical - ensures switch remains off until input stabilizes, avoiding brown-out misoperation during power ramp |
| ESD Robustness | 4kV HBM - protects against handling ESD in manufacturing and field service environments without external TVS |
Applications
| USB 2.0 Host Port Protection | Laptop Docking Station Power Management |
|---|---|
|
Use Scenario: A laptop USB-A port supplies power to peripherals such as keyboards, webcams, or flash drives during hot insertion. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery with inrush limiting and fault isolation. Use Value: Prevents host voltage droop and system reset during plug-in; 7ms FLG blanking avoids nuisance trips from cable capacitance. |
Use Scenario: Docking station routes 5V power to multiple downstream USB ports, monitors each for overcurrent independently. IC Role / Device Role / Timing Role: Per-port power gate with discharge function ensuring clean power-down before peripheral removal. Use Value: Enables safe hot-unplug of peripherals without disrupting other connected devices or host stability. |
| Set-Top Box USB Peripheral Interface | Smartphone Charging Hub Power Control |
|
Use Scenario: STB provides USB power to external HDDs or Wi-Fi adapters used for media streaming or firmware updates. IC Role / Device Role / Timing Role: Load switch with thermal protection guarding against enclosure overheating during extended HDD operation. Use Value: Sustains 1.5A continuous load while throttling only under sustained short-circuit - no latch-off behavior. |
Use Scenario: Multi-port charging hub manages power delivery to smartphones, tablets, and accessories simultaneously. IC Role / Device Role / Timing Role: Independent channel switch per port, coordinating with USB PD controller for priority allocation. Use Value: Output discharge clears residual charge before re-enabling, preventing data corruption during rapid port cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side USB power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCK107AG,314 (Toshiba) | Active-high enable, 2.0A limit, 110mΩ RDS(ON), no integrated discharge | Lacks output discharge path - requires external MOSFET + resistor for same functionality | Select when board space allows discrete discharge implementation and lower cost outweighs integration benefit |
| TPS22945DRCR (TI) | Active-high enable, 2.2A limit, 46mΩ RDS(ON), 1.2ms rise time, no UVLO | No undervoltage lockout - risks turn-on during brown-out; higher RDS(ON) not applicable due to lower value | Select for ultra-low-loss applications where input rail stability is guaranteed and UVLO is managed externally |
Compared with TCK107AG,314 and TPS22945DRCR, the AP2191DFMG-7 uniquely integrates discharge, UVLO, and 7ms deglitch in a 2mm×1.8mm package - delivering complete USB 2.0 port protection with zero external components beyond pull-ups and bypass caps.
Availability
AP2191DFMG-7 is available at Aetrix Electronics and suitable for USB 2.0 host ports, laptop docking stations, and set-top box peripheral interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2191DFMG-7 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 consumer, computing, and industrial markets.
The AP2191D product line targets USB-compliant hot-swap power distribution, emphasizing integration of protection, timing control, and thermal resilience in compact surface-mount packages for space-constrained endpoints.
FAQ
What is the maximum continuous load current supported by AP2191DFMG-7?
The AP2191DFMG-7 supports 1.5A maximum continuous load current under recommended operating conditions (TA ≤ +85°C, proper PCB thermal design). Its 2.1A current limit is a trip threshold - sustained operation above 1.5A risks thermal shutdown depending on ambient temperature and copper area.
Does AP2191DFMG-7 require external components for basic USB port protection?
No external components are required for core functionality: UVLO, current limiting, thermal shutdown, and FLG reporting operate autonomously. Only a 0.1µF ceramic capacitor on IN-GND and an external pull-up on FLG are recommended for robust operation - no RC networks, TVS diodes, or discharge MOSFETs needed.
How does the 7ms FLG deglitch time affect system fault response?
The 7ms deglitch ensures FLG only asserts for faults lasting longer than 7ms - effectively ignoring inrush spikes from 120µF output capacitors or connector mating transients. This eliminates false interrupts to the host MCU while preserving fast response to genuine short circuits or thermal runaways.
Can AP2191DFMG-7 be used in USB-C applications?
AP2191DFMG-7 is specified for USB 2.0 (5V-only) applications and lacks native USB-C features like CC logic, VCONN support, or 20V tolerance. It may serve as a VBUS switch in legacy USB-C receptacles supporting only USB 2.0 data + 5V power, but not in full-featured USB-C PD implementations.
AP2191DFMG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 6-UFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1.5A
- Rds On (Typ):
- 90mOhm
- Input Type:
- Non-Inverting
- Features:
- Load Discharge, Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2018-6
AP2191DFMG-7 FAQ
1.How can I place an order for AP2191DFMG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2191DFMG-7 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 AP2191DFMG-7 reliable?
The price and inventory of AP2191DFMG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2191DFMG-7 is usually 5 days.
3.What payment methods are accepted for AP2191DFMG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2191DFMG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2191DFMG-7?
AP2191DFMG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2191DFMG-7 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 AP2191DFMG-7?
For technical support, including AP2191DFMG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2191DFMG-7 requirements.
6.How does Aetrix verify that AP2191DFMG-7 is sourced from the original manufacturer or authorized distributors?
All AP2191DFMG-7 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 AP2191DFMG-7 meets industry standards.
7.What is the process for return or replacement of AP2191DFMG-7?
All AP2191DFMG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2191DFMG-7, 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 AP2191DFMG-7 part is unused and in its original packaging.
Return procedure for AP2191DFMG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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