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Vishay Siliconix SI9976DY-T1-E3
- Part No.:
- SI9976DY-T1-E3
- Manufacturer:
- Vishay Siliconix
- Category:
- Gate Drivers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI9976DY-T1-E3.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,106
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Product details
Overview
SI9976DY-T1-E3 from Vishay Siliconix is an N-channel half-bridge gate driver IC designed to directly drive high-side and low-side MOSFETs in 20–40 V power systems. It features integrated bootstrap level-shifting, static (dc) high-side operation via internal charge pump, cross-conduction protection with 250 ns/300 ns dead-time delays, undervoltage lockout on VDD and CBOOT, and latched fault feedback. It is used in motor drives and industrial DC-DC converters requiring robust gate drive with short-circuit detection.
For engineers reviewing the SI9976DY-T1-E3 datasheet, SI9976DY-T1-E3 pinout, SI9976DY-T1-E3 application, or SI9976DY-T1-E3 equivalent, key selection considerations include bootstrap capacitor support (0.01 µF), dual UVLO thresholds (11 V and 14 V), fault latch reset via EN rising edge, and SOIC-14 package compatibility with industrial −40 °C to +85 °C operation.
Technical Context
The SI9976DY-T1-E3 implements a single-input, dual-output half-bridge driver architecture with Schmitt-trigger logic inputs for noise immunity. Its internal low-voltage regulator generates VDD (~16 V) from the 20–40 V V+ supply, powering logic and gate drivers while enabling direct system-supply interfacing without auxiliary rails.
Charge-pump-based high-side drive supports true dc operation: the internal pump replenishes CBOOT leakage during sustained high-side conduction, eliminating duty-cycle limitations typical of passive bootstrap circuits. Fault detection monitors S1 node voltage transitions (300 ns high-side, 200 ns low-side short-detection windows) and latches FAULT output on overcurrent or UVLO events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V+ Supply Range | 20 V to 40 V - Directly powers half-bridge MOSFETs and internal regulators; no auxiliary supply needed for gate drive. |
| Output Drive Capability | G1/G2: 10 mA sink / 60 mA source - Sufficient for driving standard N-channel MOSFET gates up to ~1 nF load at 100 kHz. |
| Propagation Delay | tPLH/tPHL: 50–400 ns - Matches fast-switching power stages; asymmetry enables precise dead-time control. |
| UVLO Thresholds | UVL1 = 11 V, UVL2 = 14 V - Independent monitoring of VDD and bootstrap voltage ensures safe startup and sustained high-side operation. |
| Fault Response | Latched FAULT output with EN-reset - Prevents uncontrolled re-start after short-circuit; requires explicit enable toggle to resume. |
| Operating Temperature | −40 °C to +85 °C - Qualified for industrial motor control and power supply environments without derating. |
Pinout & Package
SI9976DY-T1-E3 is housed in a 14-pin SOIC (Narrow) surface-mount package (JEDEC MS-012AC), with exposed pad not present. Pin 1 and Pins 11 & 14 are NC; thermal performance relies on PCB copper area under pins 10 (GND) and 3 (V+).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2 (CAP) | Bootstrap capacitor positive terminal | Connects to + terminal of 0.01 µF CBOOT; internal charge pump uses this node to generate floating high-side gate voltage. |
| Pin 3 (V+) | Main high-voltage supply input | Single 20–40 V rail powers both external half-bridge and internal regulators; no separate gate-drive supply required. |
| Pin 5 (IN) | Logic input for bridge state control | Single signal determines complementary G1/G2 outputs; Schmitt trigger provides 0.5 V hysteresis against noise. |
| Pin 6 (EN) | Enable with fault reset function | Low disables outputs; rising edge clears latched FAULT condition and resumes operation per IN state. |
| Pin 9 (G2) | Low-side gate driver output | Directly drives source-connected NMOS gate; referenced to GND (Pin 10); capable of 60 mA source current. |
| Pin 12 (G1) | High-side gate driver output | Drives drain-connected NMOS gate referenced to S1 (Pin 13); enabled only when CBOOT voltage exceeds UVL2 (14 V). |
| Pin 13 (S1) | Half-bridge output node | Connects to high-side source, low-side drain, load, and CBOOT negative terminal; monitored for short-circuit detection. |
Key Features
| Feature | Design Value |
|---|---|
| Static (dc) high-side drive | Internal charge pump sustains G1 gate voltage indefinitely-enables 100% duty cycle high-side conduction without external circuitry. |
| Cross-conduction prevention | Asymmetric 250 ns (G2→G1) and 300 ns (G1→G2) dead-time delays prevent shoot-through during switching transitions. |
| Short-circuit fault detection | Monitors S1 voltage slew rate; asserts latched FAULT if expected transition fails within 200/300 ns window-detects hard shorts and excessive capacitive loads. |
| Two-stage undervoltage lockout | Separate UVLO on VDD (11 V) and bootstrap (14 V) ensures safe startup and prevents high-side turn-on with insufficient gate drive margin. |
Applications
| Brushless DC Motor Control | Industrial DC-DC Converters |
|---|---|
Use Scenario: Driving three-phase BLDC inverter legs using external N-channel MOSFETs in HVAC blowers or automated valves. IC Role / Device Role / Timing Role: Half-bridge gate driver providing synchronized, shoot-through–protected G1/G2 outputs with fault feedback to MCU. Use Value: Enables compact, cost-effective inverter design with single 36 V bus, eliminating isolated gate supplies and simplifying layout. | Use Scenario: Controlling synchronous rectification in non-isolated buck or half-bridge DC-DC modules for PLC I/O power rails. IC Role / Device Role / Timing Role: Gate driver delivering precise timing and UVLO-protected high-side/low-side control for 20–40 V input stages. Use Value: Supports continuous conduction mode (CCM) operation with dc-capable high-side drive, improving efficiency over bootstrap-only alternatives. |
| Medical Infusion Pump Drivers | Office Automation Power Stages |
Use Scenario: Driving microstepping H-bridges in precision syringe pump actuators requiring silent, jitter-free current control. IC Role / Device Role / Timing Role: Low-jitter gate driver with Schmitt-trigger inputs and latched fault reporting for safety-critical motor sequencing. Use Value: Fault latch prevents unintended restart after overcurrent, meeting IEC 60601-1 risk management requirements for medical devices. | Use Scenario: Powering paper-handling motors and solenoids in multifunction printers with shared 24 V system rail. IC Role / Device Role / Timing Role: Robust gate driver with ESD protection on logic pins and short-circuit detection for intermittent mechanical jams. Use Value: Reduces field failures from motor stall-induced MOSFET failure via automatic shutdown and visible FAULT flag to system controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR2104PBF | Lower V+ range (10–20 V); no internal charge pump-requires external bootstrap diode/cap; no latched FAULT. | Suitable for lower-voltage (<20 V) DC-DC but lacks dc high-side capability and fault persistence. | Select IR2104PBF only if system V+ ≤ 20 V and fault handling is managed externally. |
| LM5109BMAX/NOPB | Wider V+ range (8–100 V); independent high/low inputs; no integrated UVLO on bootstrap; FAULT is open-drain, non-latching. | Better for wide-input industrial supplies but requires external logic for dead-time and fault management. | Choose LM5109BMAX/NOPB when flexible input control and higher voltage tolerance outweigh integrated protection needs. |
Compared with IR2104PBF and LM5109BMAX/NOPB, the SI9976DY-T1-E3 uniquely combines dc-capable high-side drive, dual UVLO, and latched fault reporting in a single SOIC-14 package-reducing BOM count and simplifying safety-critical designs where sustained high-side conduction and autonomous fault response are required.
Availability
SI9976DY-T1-E3 is available at Aetrix Electronics and suitable for motor drives, industrial DC-DC converters, and medical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SI9976DY-T1-E3 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
Vishay Siliconix is a global semiconductor manufacturer specializing in discrete MOSFETs, diodes, optoelectronics, and analog ICs, with emphasis on power efficiency and reliability.
The SI9976DY-T1-E3 belongs to Vishay's high-voltage gate driver product line, engineered for industrial and medical systems demanding robust short-circuit protection, dc high-side operation, and simplified bootstrap implementation.
FAQ
What is the minimum V+ supply voltage required for reliable operation of the SI9976DY-T1-E3?
The SI9976DY-T1-E3 requires a minimum V+ supply of 20 V for guaranteed operation across the full −40 °C to +85 °C temperature range. Below 20 V, internal regulation of VDD may fail, triggering undervoltage lockout (UVL1 = 11 V). At 20 V, the device delivers full gate drive strength and maintains fault detection integrity. The SI9976DY-T1-E3 is not rated for operation below this threshold.
Can the SI9976DY-T1-E3 drive high-side N-channel MOSFETs continuously (100% duty cycle)?
Yes, the SI9976DY-T1-E3 supports true dc high-side operation via its integrated charge pump, which actively replenishes leakage current in the bootstrap capacitor. This allows indefinite high-side conduction without external circuitry-unlike passive bootstrap drivers. The SI9976DY-T1-E3 achieves this while maintaining UVLO monitoring on the CBOOT node (UVL2 = 14 V), ensuring gate voltage remains sufficient throughout.
How does the FAULT output of the SI9976DY-T1-E3 behave during a short-circuit event?
Upon detecting a short (e.g., S1 stuck at V+ or GND), the SI9976DY-T1-E3 asserts FAULT high and latches it. The output remains high until a rising edge is applied to EN-this reset action clears the latch and restores normal G1/G2 operation based on the current IN state. UVLO on VDD also pulls FAULT high but clears automatically when voltage recovers; only short-circuit faults require manual EN reset. The SI9976DY-T1-E3 thus distinguishes between recoverable and persistent faults.
What is the recommended bootstrap capacitor value for the SI9976DY-T1-E3, and why?
Vishay specifies a 0.01 µF ceramic capacitor for CBOOT (connected between CAP and S1 pins) for most applications. This value balances charge retention during high-duty-cycle operation with fast recharge via the low-side switch. Larger values increase stored energy but slow recharge time; smaller values risk voltage droop under heavy gate charge demand. The SI9976DY-T1-E3's internal charge pump mitigates droop, making 0.01 µF optimal for reliability and layout simplicity.
Is the SI9976DY-T1-E3 pin-compatible with other Vishay half-bridge drivers such as the SI9955?
No, the SI9976DY-T1-E3 is not pin-compatible with the SI9955. The SI9955 is a dual N-channel power MOSFET pair (not a driver), while the SI9976DY-T1-E3 is a gate driver IC with distinct pin functions-including CAP, FAULT, EN, and separate G1/G2 outputs. Their footprints, electrical roles, and system integration requirements differ fundamentally. The SI9976DY-T1-E3 must be used with external discrete MOSFETs, whereas the SI9955 integrates them.
SI9976DY-T1-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 16.5V
- Logic Voltage - VIL, VIH:
- 1V, 4V
- Current - Peak Output (Source, Sink):
- 500mA, 500mA
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 40 V
- Rise / Fall Time (Typ):
- 110ns, 50ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SI9976DY-T1-E3 FAQ
1.How can I place an order for SI9976DY-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9976DY-T1-E3 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 SI9976DY-T1-E3 reliable?
The price and inventory of SI9976DY-T1-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI9976DY-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9976DY-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9976DY-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9976DY-T1-E3?
SI9976DY-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9976DY-T1-E3 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 SI9976DY-T1-E3?
For technical support, including SI9976DY-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9976DY-T1-E3 requirements.
6.How does Aetrix verify that SI9976DY-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9976DY-T1-E3 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 SI9976DY-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9976DY-T1-E3?
All SI9976DY-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9976DY-T1-E3, 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 SI9976DY-T1-E3 part is unused and in its original packaging.
Return procedure for SI9976DY-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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