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Skyworks Solutions Inc. SI8752AB-ASR
- Part No.:
- SI8752AB-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8752AB-ASR.pdf
- Description:
- DGTL ISO 2.5KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,528
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Product details
Overview
SI8752AB-ASR from Skyworks Solutions is an isolated FET driver with diode-emulator input, designed to replace mechanical relays and optocoupler-based SSRs in high-reliability AC/DC load switching. It delivers 10 V gate drive at 1 mA input current, achieves 82 μs turn-on time at 30 mA input, features Active Miller Clamp, and operates across –40 to +125 °C for automotive use.
For engineers reviewing the SI8752AB-ASR datasheet, SI8752AB-ASR pinout, SI8752AB-ASR application, or SI8752AB-ASR equivalent, this page provides verified technical context, SOIC-8 package mapping, automotive-grade isolation specs (2.5 kVrms, AEC-Q100), and real-world SSR design guidance - all confirmed from Skyworks' official Si8751/52 datasheet Rev. A (July 2022).
Technical Context
The SI8752AB-ASR uses RF-based CMOS isolation to transmit both signal and power across a semiconductor barrier, eliminating need for external isolated supply. Its diode-emulator input (ANODE/CATHODE) accepts 1–30 mA forward current to modulate gate drive strength and timing.
It integrates dual Miller clamp inputs (MCAP1/MCAP2) that activate internal low-impedance gate-source paths when dV/dt exceeds threshold, preventing unintended FET turn-on during high-slew transients - critical for AC mains and motor drive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVrms - certified to UL1577, VDE 0884-10, CSA C22.2 No. 5A, CQC GB4943.1 for reinforced insulation |
| Operating Temperature | –40 to +125 °C - qualified per AEC-Q100 Grade 1 for automotive under-hood and charging systems |
| Input Type | Diode emulator (ANODE/CATHODE) - replaces LED input of legacy opto-SSRs; supports 1–30 mA control current |
| Gate Drive Output | 10 V nominal (8–13 V range) - sufficient to fully enhance standard N-channel MOSFETs without external level shifters |
| Turn-on Time | 82 μs at 30 mA input - enables fast switching in battery monitoring and HVAC relay replacement |
| Common-Mode Transient Immunity | 20 kV/μs - ensures robust operation in noisy motor control and AC line environments |
| Miller Clamp Current | 6 mA max - actively sinks gate charge during high dV/dt events to suppress inductive chatter |
Pinout & Package
SI8752AB-ASR is housed in a ROHS-compliant narrow-body SOIC-8 package (5.0 × 4.0 mm footprint, 1.27 mm pitch), with creepage/clearance margins exceeding IEC 60664-1 requirements for 600 VRMS basic insulation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - must be left floating; not internally bonded |
| 2 | ANODE | Positive terminal of diode-emulator input - connects to controller-side current source |
| 3 | NC | No connect - must be left floating; not internally bonded |
| 4 | CATHODE | Negative terminal of diode-emulator input - connects to system ground or return path |
| 5 | SOURCE | Reference node for output side - ties to source of external N-channel FET |
| 6 | MCAP2 | Miller clamp input 2 - optional capacitor connection to drain of second FET in AC switch configuration |
| 7 | MCAP1 | Miller clamp input 1 - optional capacitor connection to drain of primary FET |
| 8 | GATE | Output gate drive node - directly drives gate of external N-channel FET |
Key Features
| Feature | Design Value |
|---|---|
| Self-powered isolated output | Generates its own secondary-side gate drive voltage - no isolated DC/DC converter required |
| Diode-emulator input | Replaces legacy optocoupler LED interface - eliminates temperature-limited lifetime and supports full automotive temp range |
| Dual Miller clamp inputs | Enables independent protection of two FETs in back-to-back AC switch topologies - prevents shoot-through and chatter |
| AEC-Q100 qualification | Validated for automotive applications including HEV/EV charging and battery disconnect - meets stress test requirements for Grade 1 |
| SOIC-8 industrial footprint | Drop-in compatible with standard PCB assembly processes - 4.7 mm clearance / 3.9 mm creepage meets safety standards |
Applications
| Motor Control | Valve Control |
|---|---|
Use Scenario: Brushless DC motor phase switching in automotive HVAC actuators and power seat modules. IC Role / Device Role / Timing Role: Isolated gate driver enabling microcontroller-level logic to safely switch 24 V/48 V FETs driving inductive loads. Use Value: Eliminates mechanical relay wear-out and contact bounce; supports 82 μs switching for precise PWM commutation timing. |
Use Scenario: On/off control of solenoid valves in EV thermal management systems and industrial pneumatic controls. IC Role / Device Role / Timing Role: Solid-state relay driver interfacing MCU GPIO to high-side FETs controlling 12–48 V valve coils. Use Value: Enables silent, spark-free operation with AEC-Q100 reliability - critical for sealed, maintenance-free valve enclosures. |
| HVAC Relay Replacement | HEV/EV Automotive Charging |
Use Scenario: Replacing 25 A mechanical relays in residential/commercial HVAC compressor and fan control panels. IC Role / Device Role / Timing Role: Dual-FET gate driver supporting AC mains (120/240 VAC) switching via back-to-back N-channel configuration. Use Value: Achieves >100 k-cycle lifetime vs. <100 k mechanical cycles; 2.5 kVrms isolation meets UL 60335-1 creepage requirements. |
Use Scenario: Controlling bidirectional energy flow in on-board chargers (OBC) and DC fast-charging contactors. IC Role / Device Role / Timing Role: Isolated driver for high-voltage N-channel FETs in pre-charge and main contactor circuits (up to 1000 VDC). Use Value: Supports fast turn-off (<35 μs) to interrupt fault currents; Miller clamp prevents false triggering during high dV/dt transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated FET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SIL1117BD-IS | Single-channel, digital-input isolated driver; 5 kVrms isolation; no diode-emulator input | Requires logic-level MCU interface; lacks ANODE/CATHODE compatibility with legacy opto-SSR designs | Choose for new designs needing higher isolation voltage and digital control - not drop-in for Si8752AB-ASR |
| ADUM4122BRIZ | 2.5 kVrms, digital-input isolated gate driver; 4 A peak output; no Miller clamp or self-powered output | Requires external isolated supply; optimized for high-speed IGBT/SiC gate driving, not SSR replacement | Choose when driving high-capacitance wide-bandgap devices - not suitable for cost-sensitive SSR retrofit |
Compared with SIL1117BD-IS and ADUM4122BRIZ, SI8752AB-ASR uniquely combines diode-emulator compatibility, self-powered gate drive, integrated Miller clamp, and AEC-Q100 qualification - making it the only direct solution for automotive SSR upgrades requiring zero MCU firmware changes and no external power rails.
Availability
SI8752AB-ASR is available at Aetrix Electronics and suitable for automotive charging, battery monitoring, and HVAC relay replacement requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SI8752AB-ASR 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
Skyworks Solutions is a global leader in analog and mixed-signal semiconductors, specializing in RF, isolation, and precision timing solutions for wireless infrastructure, automotive, and industrial markets.
The Si875x product line was developed specifically to enable solid-state relay architectures with optocoupler-compatible interfaces, targeting mechanical relay replacement in harsh automotive and industrial environments where reliability, lifetime, and temperature stability are critical.
FAQ
What is the function of the NC pins on SI8752AB-ASR?
Pin 1 and Pin 3 of SI8752AB-ASR are designated No Connect (NC) and are not internally bonded. They must remain unconnected on the PCB - routing traces or placing vias to these pins may compromise isolation integrity or cause latch-up. This NC configuration is consistent across all Si8752 variants in SOIC-8 packaging per Skyworks' datasheet Figure 5.2 and Table 5.2.
Does SI8752AB-ASR require an external isolated power supply?
No, SI8752AB-ASR does not require an external isolated power supply. It generates its own gate drive voltage on the secondary side using RF-based power transmission across the isolation barrier. This self-contained architecture eliminates the need for isolated DC/DC converters or auxiliary windings - a key differentiator from non-integrated gate drivers like ADUM4122BRIZ.
How does the Miller Clamp feature work in SI8752AB-ASR?
In SI8752AB-ASR, the Miller Clamp activates when a fast-rising dV/dt signal appears on either MCAP1 or MCAP2, causing internal circuitry to short GATE to SOURCE. This prevents unintended FET turn-on during high-slew transients. A 10 pF capacitor (typical) connects each FET drain to its respective MCAP pin - per datasheet Section 2.6.2 and Figure 3.2.
What is the maximum input current rating for SI8752AB-ASR's diode-emulator input?
The absolute maximum average forward anode current for SI8752AB-ASR is 30 mA, as specified in Table 4.8 Absolute Maximum Ratings. Operation above this value risks permanent damage. The device delivers optimal performance (e.g., 82 μs turn-on) at 30 mA, with diminishing returns beyond 15 mA per Section 2.4 and Table 4.1.
Is SI8752AB-ASR pin-compatible with other Si875x variants?
Yes, SI8752AB-ASR shares identical SOIC-8 pinout and footprint with all Si8751/52 family members (e.g., SI8752AB-IS, SI8751AB-AS), including matching NC, ANODE, CATHODE, SOURCE, MCAP1, MCAP2, and GATE assignments. However, input behavior differs: SI8752AB-ASR uses diode-emulator control, while SI8751 variants use digital CMOS input - substitution requires circuit redesign.
SI8752AB-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- -
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -
- Current - Output High, Low:
- -
- Current - Peak Output:
- -
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI8752AB-ASR FAQ
1.How can I place an order for SI8752AB-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8752AB-ASR 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 SI8752AB-ASR reliable?
The price and inventory of SI8752AB-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8752AB-ASR is usually 5 days.
3.What payment methods are accepted for SI8752AB-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8752AB-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8752AB-ASR?
SI8752AB-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8752AB-ASR 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 SI8752AB-ASR?
For technical support, including SI8752AB-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8752AB-ASR requirements.
6.How does Aetrix verify that SI8752AB-ASR is sourced from the original manufacturer or authorized distributors?
All SI8752AB-ASR 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 SI8752AB-ASR meets industry standards.
7.What is the process for return or replacement of SI8752AB-ASR?
All SI8752AB-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8752AB-ASR, 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 SI8752AB-ASR part is unused and in its original packaging.
Return procedure for SI8752AB-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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