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Skyworks Solutions Inc. SI823H9BC-AS
- Part No.:
- SI823H9BC-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI823H9BC-AS.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,211
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Product details
Overview
SI823H9BC-AS from Skyworks is an automotive-grade, single-channel isolated gate driver with symmetric 4.0 A sink/source peak output, 3.75 kVRMS isolation, and 8 V UVLO threshold. It features EN pin control, no dead time programmability, and operates across –40 °C to +125 °C. Designed for high-reliability IGBT/MOSFET drive in on-board chargers and traction inverters.
For engineers reviewing the SI823H9BC-AS datasheet, SI823H9BC-AS pinout, SI823H9BC-AS application, or SI823H9BC-AS equivalent, this page delivers verified technical context, package-specific pin functions, automotive-qualified reliability data, and real-world motor control and power conversion use cases - all grounded in Skyworks' official Si823Hx datasheet (Rev. 206414A, Nov 2022).
Technical Context
The SI823H9BC-AS implements RF-based on/off keying across a silicon isolation barrier, enabling robust noise immunity (>125 kV/µs CMTI) without startup initialization. Its single-channel architecture accepts TTL-compatible VI input and asserts VO+ (high-side) and VO– (low-side) outputs with fail-safe default-low behavior when VDDI is unpowered.
It integrates undervoltage lockout (UVLO = 8 V) on the input side and supports 3.0–5.5 V VDDI with up to 30 V VDD drive supply. The EN pin provides active-low safety disable with internal 100 kΩ pull-down, and thermal shutdown triggers at >150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS for 1 minute - meets reinforced insulation requirements per IEC 62368-1 and UL 1577. |
| Output Drive Strength | 4.0 A peak sink/source - enables fast switching of high-capacitance IGBTs and SiC MOSFETs in motor drives. |
| Propagation Delay | ≤30 ns - ensures tight timing control in high-frequency PWM applications like EV traction inverters. |
| UVLO Threshold | 8 V (typical) on input side - prevents erratic operation during brown-out conditions in automotive 12 V systems. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive environments per AEC-Q100 Grade 1. |
| Package | NB SOIC-8 - industry-standard 8-pin narrow-body SOIC footprint with creepage/clearance optimized for 3.75 kVRMS. |
| EMI Immunity | >125 kV/µs common-mode transient immunity - sustains reliable operation in noisy high-dv/dt power stages. |
Pinout & Package
NB SOIC-8 (Narrow Body Small Outline Integrated Circuit, 8-pin), RoHS-compliant, JEDEC MS-012AC, 1.27 mm pitch, 5.0 mm × 6.0 mm body size, 1.75 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | 3.0–5.5 V logic supply for control side; powers internal oscillator and modulator. |
| GNDI | Input-side ground | Reference for VI and EN inputs; must be isolated from power-side ground. |
| VI | Input signal | TTL-compatible high-true logic input; high = VO+ high / VO– low; low = VO+ low / VO– high. |
| EN | Enable control | Active-low safety disable; pulls both outputs low when asserted; internal 100 kΩ pull-down. |
| VDD | Output-side supply | 5.5–30 V gate drive supply; powers output stage and booster circuit. |
| GND | Output-side ground | Reference for VO+ and VO–; connects to power device source/emitter. |
| VO+ | High-side output | Source-connected output; drives gate of high-side switch (e.g., upper IGBT in half-bridge). |
| VO– | Low-side output | Sink-connected output; drives gate of low-side switch (e.g., lower IGBT in half-bridge). |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe default-low outputs | VO+ and VO– automatically go low if VDDI is lost - prevents shoot-through in half-bridge configurations. |
| Output booster architecture | Parallel PMOS + NMOS pull-up delivers >3 A extra current at Miller plateau - reduces turn-on time for SiC/GaN devices. |
| Automotive qualification | AEC-Q100 Grade 1 qualified with AIAG-compliant PPAP, IMDS/CAMDS support - suitable for OBC and BMS production. |
| Thermal protection | Internal sensor forces outputs low above 150 °C - protects against latch-up or thermal runaway in overloads. |
| High CMTI | 125 kV/µs minimum - maintains signal integrity in high-dv/dt environments like 800 V EV inverters. |
Applications
| On-Board Charger (OBC) | Traction Inverter |
|---|---|
|
Use Scenario: Isolated gate drive for bidirectional AC/DC and DC/DC stages in 11–22 kW EV on-board chargers. IC Role / Device Role / Timing Role: Single-channel isolated driver controlling high-side IGBTs in interleaved totem-pole PFC and LLC resonant converters. Use Value: 30 ns propagation delay and 125 kV/µs CMTI ensure precise zero-voltage switching timing and noise resilience in 100+ kHz switching topologies. |
Use Scenario: Gate driving of 750 V IGBT modules in 400/800 V battery electric vehicle traction inverters. IC Role / Device Role / Timing Role: Fail-safe isolated driver for high-side switches in three-phase inverter legs, paired with complementary low-side drivers. Use Value: 4.0 A peak drive strength and Miller plateau booster enable <100 ns turn-on of 1200 V, 400 A IGBTs under full load. |
| Battery Management System (BMS) | Industrial Motor Drive |
|
Use Scenario: Isolated control of contactor pre-charge and main disconnect MOSFETs in high-voltage battery packs (400–900 V). IC Role / Device Role / Timing Role: Single-channel driver providing galvanic isolation between MCU and high-side power switches in safety-critical HV disconnect paths. Use Value: 3.75 kVRMS isolation and AEC-Q100 qualification meet ASIL-B functional safety requirements for HV battery isolation. |
Use Scenario: Driving 650 V Si IGBTs in 30–75 kW industrial servo and pump inverters operating in harsh factory environments. IC Role / Device Role / Timing Role: Robust gate driver for half-bridge legs in vector-controlled VFDs, interfacing with isolated PWM controllers. Use Value: –40 °C to +125 °C operation and 10-year lifetime reliability exceed industrial temperature and longevity expectations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI823H9AC-AS | 6 V UVLO threshold; otherwise identical pinout, package, and specs. | Better suited for 5 V logic systems with tighter supply margins; less margin against 12 V rail dips. | Select SI823H9AC-AS only if system VDDI is tightly regulated near 5 V and UVLO headroom is constrained. |
| SI823H9CC-AS | 12 V UVLO threshold; same NB SOIC-8 package and 3.75 kVRMS rating. | Optimized for 12 V automotive domains where higher UVLO prevents false resets during cranking transients. | Choose SI823H9CC-AS for direct integration into 12 V domain controllers without external LDO regulation. |
Compared with SI823H9AC-AS and SI823H9CC-AS, the SI823H9BC-AS offers balanced 8 V UVLO - ideal for 12 V systems with moderate dropout tolerance while avoiding unnecessary overdesign or premature shutdown during cold-crank events.
Availability
SI823H9BC-AS is available at Aetrix Electronics and suitable for on-board chargers, traction inverters, and battery management systems requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI823H9BC-AS 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 semiconductors, specializing in RF, isolation, and precision timing solutions for wireless, automotive, and industrial markets.
The Si823Hx family was engineered specifically for high-reliability isolated gate driving in electric vehicle powertrain systems, emphasizing AEC-Q100 compliance, CMTI robustness, and fail-safe behavior under fault conditions.
FAQ
What is the isolation voltage rating of the SI823H9BC-AS?
The SI823H9BC-AS is rated for 3.75 kVRMS isolation for 1 minute per UL 1577 and IEC 62368-1. This reinforced insulation rating is validated for the NB SOIC-8 package and supports safe operation in 400–800 V battery systems. The isolation barrier uses Skyworks' proprietary silicon technology, not optocouplers.
Does the SI823H9BC-AS support programmable dead time?
No, the SI823H9BC-AS does not support programmable dead time. As a single-channel driver with EN control (not DIS), it lacks DT pin functionality. Dead time programmability is only available on HS/LS or PWM variants (e.g., SI823H1xx, SI823H4xx) in NB SOIC-16 or WB SOIC-14 packages.
What is the function of the EN pin on the SI823H9BC-AS?
The EN pin on the SI823H9BC-AS is an active-low enable input with internal 100 kΩ pull-down. When pulled low, it forces both VO+ and VO– outputs low regardless of VI state, providing hardware-level safety disable. It has no effect if VDDI is below UVLO (8 V).
Is the SI823H9BC-AS pin-compatible with other Si823Hx variants in NB SOIC-8?
Yes - all Si823H9x variants (e.g., SI823H9AC-AS, SI823H9BC-AS, SI823H9CC-AS, SI823H9TC-AS) share identical NB SOIC-8 pinout, footprint, and pin functions. Only UVLO threshold and EN/DIS configuration differ; no PCB redesign is needed when substituting within the Si823H9x series.
What thermal protection does the SI823H9BC-AS provide?
The SI823H9BC-AS includes integrated thermal shutdown that forces VO+ and VO– low when junction temperature exceeds 150 °C. This protects downstream power devices from thermal runaway due to overload, ambient overheating, or cooling failure - a critical feature for automotive traction and charging applications.
SI823H9BC-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si823Hx
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 125kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 30ns, 30ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 4A, 4A
- Current - Peak Output:
- 6A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 5.5V ~ 30V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI823H9BC-AS FAQ
1.How can I place an order for SI823H9BC-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI823H9BC-AS 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 SI823H9BC-AS reliable?
The price and inventory of SI823H9BC-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI823H9BC-AS is usually 5 days.
3.What payment methods are accepted for SI823H9BC-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI823H9BC-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI823H9BC-AS?
SI823H9BC-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI823H9BC-AS 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 SI823H9BC-AS?
For technical support, including SI823H9BC-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI823H9BC-AS requirements.
6.How does Aetrix verify that SI823H9BC-AS is sourced from the original manufacturer or authorized distributors?
All SI823H9BC-AS 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 SI823H9BC-AS meets industry standards.
7.What is the process for return or replacement of SI823H9BC-AS?
All SI823H9BC-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI823H9BC-AS, 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 SI823H9BC-AS part is unused and in its original packaging.
Return procedure for SI823H9BC-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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