My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ1324DI-01
- Part No.:
- AOZ1324DI-01
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
AOZ1324DI-01.pdf
- Description:
- ECPOWER 20V 32M PROTECTION SWITC
- Quantity:
- Payment:
- Shipping:
Inventory:1,437
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ1324DI-01 from Alpha and Omega Semiconductor is a high-side protection switch with true reverse-current blocking (TRCB), programmable over-voltage protection, and auto-restart fault recovery. It operates from 3.4V to 22V input, delivers 32mΩ typical RON, supports up to 3.5A DC load current, and is rated for 28V absolute maximum on VIN/VOUT - designed specifically for USB Type-C PD power delivery paths in docking stations and portable computing systems.
For engineers reviewing the AOZ1324DI-01 datasheet, pinout, applications, or equivalent options, key selection criteria include its 26mV TRCB threshold, 64ms auto-restart interval, -40°C to +85°C operating range, DFN-12L thermal pad layout requirements, and compatibility with IEC61000-4-5 40V surge immunity without input capacitor.
Technical Context
The AOZ1324DI-01 integrates two back-to-back N-channel MOSFETs to enable bidirectional isolation and true reverse-current blocking at VOUT–VVIN ≥ 26mV. Its control logic includes UVLO (3.35V threshold), programmable OVP via POVP pin (24V or 5.8V options), and thermal shutdown at 140°C with 30°C hysteresis.
Soft-start is implemented via external capacitor CSS on SS pin, enabling linear VOUT ramp-up; turn-on delay is 21ms and rise time is 1.2ms under standard conditions. Fault reporting occurs through open-drain FLTB pin, pulled low during OVP, TRCB, or thermal events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 22V - supports full USB PD 3.0 voltage range including 20V PPS profiles. |
| RON (Typical) | 32mΩ at 20V - minimizes conduction loss and thermal rise at 3.5A load (≤390mW dissipation). |
| TRCB Threshold | 26mV - prevents reverse current flow even during fast transients or hot-plug events. |
| OVP Recovery | Auto-restart every 64ms - enables self-clearing fault handling without host intervention. |
| Ambient Temp Range | -40°C to +85°C - qualified for industrial and portable computing environments. |
| ESD Rating (VIN/VOUT) | ±8kV HBM - meets IEC61000-4-2 Level 4 for robust system-level ESD immunity. |
| Surge Immunity | IEC61000-4-5: 40V on VIN, no capacitor required - simplifies front-end protection design. |
Pinout & Package
AOZ1324DI-01 is housed in a thermally enhanced 3mm × 3mm DFN-12L package with exposed floating thermal pad (EXP) requiring multi-layer PCB copper fill and vias for optimal heat dissipation. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VOUT | Switch output node - connects to downstream USB VBUS rail; must be isolated from VIN when disabled. |
| 3 | POVP | OVP threshold programming input - internal 8µA bias sets 24V (POVP=0V) or 5.8V (POVP=open) thresholds. |
| 4 | FLTB | Open-drain fault indicator - pulled low during OVP, TRCB, or thermal shutdown; requires external pull-up. |
| 5 | ENB | Active-low enable - logic low (≤0.6V) enables switch; high (≥1.4V) disables with 18µA shutdown current. |
| 6 | GND | Power ground reference - must connect directly to solid ground plane; shared with CIN/COUT grounds. |
| 7 | SS | Soft-start timing node - external capacitor (CSS) sets 10%–90% VOUT ramp time (e.g., 21ms with 5.6nF). |
| 8–10 | NC | No-connect pins - must remain unconnected and floating; no internal circuitry attached. |
| 11, 12 | VIN | Input power terminal - handles full load current; requires low-ESR ceramic input capacitor placed adjacent. |
| EXP | Exposed Thermal Pad | Floating drain node - must be soldered to large copper area with multiple vias; no electrical connection allowed. |
Key Features
| Feature | Design Value |
|---|---|
| True Reverse Current Blocking | 26mV detection threshold ensures zero reverse leakage during hot-swap or sink-source reversal. |
| Programmable Over-Voltage Protection | Two selectable thresholds (24V or 5.8V) via single resistor or open-circuit POVP pin. |
| Auto-Restart Fault Recovery | 64ms fixed restart interval enables autonomous recovery after transient overvoltage or overtemperature events. |
| Adjustable Soft-Start Slew Rate | External CSS capacitor controls VOUT ramp time, preventing inrush into highly capacitive loads (e.g., 68µF USB PD sinks). |
| Integrated Protection Suite | Combines UVLO (3.35V), OVP, TRCB, thermal shutdown (140°C), and short-circuit response in single chip. |
Applications
| Thunderbolt/USB Type-C PD Power Switch | Portable Computing Docking Station |
|---|---|
Use Scenario: USB-C port delivering up to 100W (20V/5A) with dynamic voltage negotiation and hot-plug support. IC Role / Device Role / Timing Role: High-side protection switch managing VBUS path integrity, enforcing TRCB during cable insertion/removal, and responding to PD controller fault signals via ENB/FLTB. Use Value: Prevents reverse current damage to upstream PD controllers and eliminates need for discrete back-to-back MOSFETs or Schottky diodes. |
Use Scenario: Multi-port docking station with independent USB-C PD ports, each requiring independent overvoltage and reverse-current protection. IC Role / Device Role / Timing Role: Isolated power gate per port, coordinated by MCU via ENB lines; FLTB signals routed to interrupt controller for real-time fault logging. Use Value: Enables compact, thermally efficient layout with single-chip protection per port and auto-recovery during transient surges. |
| Notebook/Desktop System Power Management | USB-C Monitor Power Delivery Interface |
Use Scenario: Notebook motherboard implementing USB-C as primary charging and display interface with strict safety compliance. IC Role / Device Role / Timing Role: Primary VBUS switch between AC adapter and internal power rails; monitors VIN for OVP and die temperature for thermal derating. Use Value: Meets IEC61000-4-5 40V surge immunity without external TVS, reducing BOM count and board space. |
Use Scenario: USB-C monitor accepting power from laptop while simultaneously sourcing video/data - requiring bidirectional protection. IC Role / Device Role / Timing Role: VBUS guard device ensuring no reverse current flows from monitor's internal power supply to laptop during disconnect events. Use Value: Guarantees 26mV TRCB response within 500ns, eliminating risk of latch-up or bus contention during hot-unplug. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side protection switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCK127G | Lower RON (18mΩ), but fixed 6V OVP only; no TRCB; 2x2mm WSON-8 package. | Lacks true reverse-current blocking and programmable OVP - unsuitable for USB-C PD where VOUT > VIN is common. | Select only if OVP threshold is fixed at 6V and TRCB is not required; verify thermal performance at 3.5A in smaller package. |
| TPS25942L | Integrated eFuse with current limiting (1.5–5A), 28V abs max, but no TRCB; uses QFN-20 package. | Provides precise current limiting and telemetry (ISENSE), but cannot block reverse current - requires external diode for USB-C sink mode. | Choose when accurate current monitoring and foldback limiting are prioritized over TRCB; expect added complexity for reverse-blocking. |
Compared with TCK127G and TPS25942L, the AOZ1324DI-01 uniquely combines programmable OVP, 26mV TRCB, and auto-restart in a 3×3mm footprint - making it the only option that fully satisfies USB-C PD sink-source bidirectional safety without supplemental components.
Availability
AOZ1324DI-01 is available at Aetrix Electronics and suitable for USB Type-C PD power switches, portable computing docking stations, and notebook/desktop system power management requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AOZ1324DI-01 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
Alpha and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, power ICs, and integrated solutions for power conversion and protection.
The AOZ1324DI-01 belongs to AOS' ECPower™ family of smart power switches, engineered specifically for USB-C PD, Thunderbolt, and portable computing applications demanding ultra-low RON, robust fault protection, and minimal board space.
FAQ
What is the over-voltage protection threshold configuration for AOZ1324DI-01?
The AOZ1324DI-01 supports two selectable over-voltage protection thresholds: 24V when POVP is grounded via ROVP, or 5.8V when POVP is left open. This is achieved using an internal 8µA bias current source - no external voltage reference is needed. The AOZ1324DI-01 datasheet specifies these values under Electrical Characteristics on page 3, and Figure 9 confirms OVP behavior for the -01 variant.
How does AOZ1324DI-01 implement true reverse current blocking?
The AOZ1324DI-01 detects reverse voltage across VOUT–VIN with 26mV threshold and responds within 500ns by turning off both back-to-back N-MOSFETs. This prevents any reverse current flow regardless of load condition or power state. The AOZ1324DI-01's TRCB function operates independently of ENB status and is active during startup, steady-state, and fault recovery - confirmed in Detailed Description (page 9) and Figure 8.
What is the fault recovery behavior of AOZ1324DI-01 versus AOZ1324DI-02?
The AOZ1324DI-01 implements auto-restart with a fixed 64ms interval after fault clearance, allowing autonomous recovery without host intervention. In contrast, AOZ1324DI-02 latches off permanently until ENB is toggled or VIN is cycled. This distinction is explicitly defined in the Ordering Information table (page 2) and Fault Protection section (page 10) of the AOZ1324DI-01 datasheet.
Can AOZ1324DI-01 operate with input voltages below 3.4V?
No - the AOZ1324DI-01 has a 3.35V under-voltage lockout (UVLO) threshold with 300mV hysteresis, meaning it remains disabled until VIN rises above 3.35V and will not turn on below 3.4V. Operation below this level is prohibited per Absolute Maximum Ratings (page 3), and the AOZ1324DI-01 will not conduct or respond to ENB until UVLO is cleared.
What thermal design guidance applies to the exposed pad of AOZ1324DI-01?
The EXP pad of AOZ1324DI-01 is a floating thermal node requiring direct solder connection to a large, multi-layer copper pour with maximum vias - not an electrical ground. Layout Guidelines (page 10) specify it must be isolated from all signals, connected to inner-layer thermal planes, and surrounded by broad VIN/VOUT copper to achieve θJA = 36°C/W. Failure to follow this causes junction temperature exceedance above 140°C.
AOZ1324DI-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 14-WFDFN 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:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 3.4V ~ 22V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 3.5A
- Rds On (Typ):
- 32mOhm
- Input Type:
- Non-Inverting
- Features:
- Auto Restart, Slew Rate Controlled, Status Flag
- Fault Protection:
- Over Temperature, Over Voltage, Short Circuit, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (3x2)
AOZ1324DI-01 FAQ
1.How can I place an order for AOZ1324DI-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ1324DI-01 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 AOZ1324DI-01 reliable?
The price and inventory of AOZ1324DI-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ1324DI-01 is usually 5 days.
3.What payment methods are accepted for AOZ1324DI-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ1324DI-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ1324DI-01?
AOZ1324DI-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ1324DI-01 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 AOZ1324DI-01?
For technical support, including AOZ1324DI-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ1324DI-01 requirements.
6.How does Aetrix verify that AOZ1324DI-01 is sourced from the original manufacturer or authorized distributors?
All AOZ1324DI-01 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 AOZ1324DI-01 meets industry standards.
7.What is the process for return or replacement of AOZ1324DI-01?
All AOZ1324DI-01 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ1324DI-01, 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 AOZ1324DI-01 part is unused and in its original packaging.
Return procedure for AOZ1324DI-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ1324DI-01 Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
