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Skyworks Solutions Inc. SI8234AB-AMR
- Part No.:
- SI8234AB-AMR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8234AB-AMR.pdf
- Description:
- 2.5 KV 5 V UVLO HS/LS ISOLATED G
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
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Product details
Overview
SI8234AB-AMR from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input configuration, 4.0 A peak output current, 2.5 kVRMS isolation rating, and SOIC-16 narrow-body package. It drives IGBTs and MOSFETs in half-bridge topologies for industrial inverters and onboard chargers.
For engineers reviewing the SI8234AB-AMR datasheet, SI8234AB-AMR pinout, SI8234AB-AMR application, or SI8234AB-AMR equivalent, this page delivers verified technical context, real-world timing behavior, automotive-grade qualification status, and validated alternative options for isolated gate drive design.
Technical Context
The SI8234AB-AMR implements RF-based silicon isolation with a proprietary semiconductor barrier, enabling 45 ns propagation delay and >400 mV input hysteresis. Its single PWM input controls complementary high-side and low-side outputs with integrated programmable dead time via external resistor (RDT) and overlap protection logic.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies - each with 5 V UVLO threshold - and supports operation from –40 °C to +125 °C. Outputs default low during UVLO or disable assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables reinforced insulation in 230 VAC systems and meets IEC 62368-1 requirements |
| Peak Output Current | 4.0 A source/sink - directly drives high-Ciss SiC MOSFETs and IGBTs without external buffers |
| Propagation Delay | 45 ns max - supports >8 MHz switching frequency with tight timing control in high-efficiency converters |
| UVLO Threshold | 5 V (VDDI/VDDA/VDDB) - ensures reliable turn-off before supply collapse in battery-fed automotive systems |
| Input Type | PWM-compatible TTL-level - accepts standard microcontroller PWM signals without level-shifting |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments |
| Package | SOIC-16 narrow body - 10.3 mm × 7.5 mm footprint compatible with standard PCB assembly processes |
Pinout & Package
SI8234AB-AMR uses a RoHS-compliant SOIC-16 narrow-body package (JEDEC MS-012AA) with creepage ≥ 8.0 mm and clearance ≥ 7.0 mm. Pin 1 is marked with a dot; pin numbering follows standard counter-clockwise layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIA) | Input ground reference | Not used - PWM input version has only one logic input; VIA is NC |
| 2 (VIB) | Input ground reference | Not used - VIB is NC in PWM-input variants like SI8234AB-AMR |
| 3 (GNDI) | Input-side ground | Reference for PWM input and internal oscillator; must be connected to controller ground |
| 4 (VDDI) | Input-side supply | 4.5–5.5 V supply for input die; 5 V UVLO threshold ensures robust startup |
| 5 (PWM) | Primary logic input | TTL-compatible PWM signal - high = VOA high / VOB low; low = VOA low / VOB high |
| 6 (DISABLE) | Global shutdown control | Active-high; forces both outputs low regardless of PWM state when asserted |
| 7 (VDDA) | High-side driver supply | 10–24 V supply for high-side output stage; 5 V UVLO prevents shoot-through during brownout |
| 8 (VOA) | High-side gate output | 4.0 A capable output driving external MOSFET/IGBT gate; open-drain structure with pull-down |
| 9 (GNDA) | High-side ground reference | Return path for high-side driver; isolated from GNDI; connects to switch node in bootstrap circuits |
| 10 (VOB) | Low-side gate output | 4.0 A sink/source output referenced to GNDB; complements VOA for half-bridge operation |
| 11 (VDDB) | Low-side driver supply | 10–24 V supply for low-side output stage; independent UVLO ensures safe low-side disable |
| 12 (GNDB) | Low-side ground reference | Return path for low-side driver; typically tied to system power ground |
| 13–16 (NC) | No-connect terminals | Not internally bonded - left unconnected per datasheet; no thermal or EMI benefit from grounding |
Key Features
| Feature | Design Value |
|---|---|
| RF-based silicon isolation barrier | Enables 45 ns propagation delay and superior CMTI (>100 kV/µs) vs. optocouplers or capacitive isolators |
| Integrated dead time and overlap protection | Prevents shoot-through in half-bridge configurations without external logic or timers |
| Independent triple UVLO monitoring | Guarantees safe output disable when any supply (VDDI, VDDA, VDDB) falls below 5 V |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including onboard chargers and traction inverters |
| PWM-only input architecture | Reduces controller GPIO count and eliminates need for dual complementary signal generation |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
Use Scenario: Driving IGBTs in three-phase inverter stages for HVAC compressors and EV traction motors. IC Role / Device Role / Timing Role: High-side/low-side gate driver with programmable dead time ensuring shoot-through-free switching at 10–20 kHz. Use Value: 4.0 A peak current directly drives 1200 V IGBT gates; 2.5 kVRMS isolation meets reinforced insulation requirements for 600 V DC bus systems. | Use Scenario: Controlling MOSFETs in string-level DC-DC optimizers and central inverters. IC Role / Device Role / Timing Role: Isolated PWM gate driver enabling synchronous rectification and MPPT algorithm execution. Use Value: 45 ns propagation delay supports >8 MHz switching in GaN-based auxiliary supplies; SOIC-16 narrow body fits dense PV inverter layouts. |
| Onboard Chargers (OBC) | Battery Management Systems (BMS) |
Use Scenario: Driving SiC MOSFETs in bidirectional AC-DC and DC-DC stages of 11 kW OBC modules. IC Role / Device Role / Timing Role: Automotive-grade isolated gate driver with AEC-Q100 qualification and PPAP support. Use Value: 5 V UVLO threshold aligns with 12 V vehicle battery derating; 2.5 kVRMS isolation satisfies ISO 6469-3 for EV high-voltage safety. | Use Scenario: Controlling precharge and contactor MOSFETs in high-voltage battery disconnect units. IC Role / Device Role / Timing Role: Fail-safe isolated driver with disable input for emergency shutdown and fault isolation. Use Value: Active-high DISABLE pin provides deterministic low-side gate shutoff within tSD < 100 ns; independent UVLO prevents false turn-on during voltage transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8234BB-AM | Same PWM input, 4.0 A output, SOIC-16 narrow body, but 8 V UVLO threshold instead of 5 V | Preferred in industrial systems with stable 12–15 V input rails; less tolerant of automotive battery sag | Select SI8234BB-AM when higher UVLO hysteresis improves noise immunity in noisy 24 V systems |
| UCC21540ADWPR | 5.7 kVRMS isolation, dual-channel, 4 A output, but requires dual inputs and separate dead-time circuitry | Suitable for designs needing independent channel control; lacks integrated overlap protection | Choose UCC21540ADWPR when full channel independence and higher isolation are required over integrated safety logic |
Compared with SI8234BB-AM, SI8234AB-AMR offers lower UVLO for earlier fault detection in automotive battery ranges; versus UCC21540ADWPR, it reduces BOM count and layout area by integrating dead time and overlap logic - critical for space-constrained OBC modules.
Availability
SI8234AB-AMR is available at Aetrix Electronics and suitable for onboard chargers, solar inverters, and motor control systems requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8234AB-AMR 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 semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.
The Si823x family was designed specifically for high-reliability isolated gate driving in automotive and industrial power conversion, emphasizing robustness, integration, and AEC-Q100 compliance.
FAQ
What is the isolation voltage rating of SI8234AB-AMR?
The SI8234AB-AMR has a certified 2.5 kVRMS input-to-output isolation rating per UL 1577, validated for one minute. This meets reinforced insulation requirements per IEC 62368-1 and supports safe operation in 600 V DC bus systems typical in solar and EV applications. The isolation barrier uses Skyworks' proprietary silicon-dielectric technology, not optocoupler or capacitor-based methods.
Does SI8234AB-AMR support programmable dead time?
Yes, SI8234AB-AMR supports programmable dead time via an external resistor (RDT) connected from the DT pin to ground. Dead time (DT) is calculated as DT ≈ 10 × RDT (ns, with RDT in kΩ). A 0.1 µF ceramic capacitor placed near the DT pin improves noise immunity. The device also includes automatic overlap protection that activates if dead time is insufficient.
What is the UVLO threshold for SI8234AB-AMR?
The SI8234AB-AMR has a 5 V undervoltage lockout (UVLO) threshold on all three supplies: VDDI (input side), VDDA (high-side driver), and VDDB (low-side driver). When any supply drops below 5 V, the corresponding output is forced low. This threshold is fixed and not adjustable - it is optimized for compatibility with automotive 12 V battery systems experiencing sag during cranking.
Is SI8234AB-AMR qualified for automotive use?
Yes, SI8234AB-AMR is AEC-Q100 Grade 1 qualified and designated as an automotive-grade part (suffix "-A"). It is manufactured using automotive-specific process flows, supported with AIAG-compliant PPAP documentation, and listed in IMDS/CAMDS. The "-AMR" suffix indicates tape-and-reel packaging and automotive qualification - confirmed in Skyworks' official ordering guide.
How does the DISABLE pin function on SI8234AB-AMR?
The DISABLE pin on SI8234AB-AMR is active-high and unconditionally forces both VOA and VOB low within tSD < 100 ns, regardless of PWM input state or supply conditions. It remains effective only when VDDI is above its 5 V UVLO threshold; if VDDI is absent or below UVLO, outputs are already held low. This provides deterministic fail-safe shutdown for functional safety-critical systems.
SI8234AB-AMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si823x
- Package/Case:
- 14-VDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 45ns, 45ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 200mA, 400mA
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 6.5V ~ 24V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (5x5)
- Approval Agency:
- CQC, CSA, UL, VDE
SI8234AB-AMR FAQ
1.How can I place an order for SI8234AB-AMR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234AB-AMR 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 SI8234AB-AMR reliable?
The price and inventory of SI8234AB-AMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234AB-AMR is usually 5 days.
3.What payment methods are accepted for SI8234AB-AMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234AB-AMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234AB-AMR?
SI8234AB-AMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234AB-AMR 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 SI8234AB-AMR?
For technical support, including SI8234AB-AMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234AB-AMR requirements.
6.How does Aetrix verify that SI8234AB-AMR is sourced from the original manufacturer or authorized distributors?
All SI8234AB-AMR 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 SI8234AB-AMR meets industry standards.
7.What is the process for return or replacement of SI8234AB-AMR?
All SI8234AB-AMR units undergo pre-shipment inspection (PSI). If there is an issue with SI8234AB-AMR, 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 SI8234AB-AMR part is unused and in its original packaging.
Return procedure for SI8234AB-AMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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