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International Test Instruments Corporation IRS21956SPBF
- Part No.:
- IRS21956SPBF
- Manufacturer:
- International Test Instruments Corporation
- Category:
- Gate Drivers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
IRS21956SPBF.pdf
- Description:
- BUFFER/INVERTER BASED PERIPHERAL
- Quantity:
- Payment:
- Shipping:
Inventory:16,344
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Product details
Overview
IRS21956SPBF from Infineon Technologies is a high-voltage, high-speed half-bridge gate driver IC with integrated bootstrap diode, 600 V high-side voltage rating, 2.5 A peak sink/source current, and 150 ns propagation delay. It drives N-channel MOSFETs or IGBTs in motor control inverters and DC-DC resonant converters.
For engineers reviewing the IRS21956SPBF datasheet, IRS21956SPBF pinout, IRS21956SPBF application, or IRS21956SPBF equivalent, key selection criteria include bootstrap operation capability, high-side floating supply tolerance, undervoltage lockout thresholds for both channels, and matched propagation delays across high- and low-side paths.
Technical Context
The IRS21956SPBF integrates independent high-side and low-side drivers with non-overlapping logic to prevent shoot-through. Its level-shift circuit supports up to 600 V DC bus voltage with ±50 V transient immunity on the high-side output.
It features separate IN and SD inputs for PWM control and shutdown, internal 0.47 Ω bootstrap diode, and UVLO thresholds of 10.5 V (on) / 8.5 V (off) for VDD and 9.5 V (on) / 7.5 V (off) for VB. Propagation delay matching is ±25 ns between channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max High-Side Voltage | 600 V – supports operation with DC bus up to 400 V RMS line-to-line in 3-phase inverters |
| Peak Output Current | ±2.5 A – sufficient to drive 10 nF gate capacitance at 100 kHz switching frequency |
| Propagation Delay | 150 ns – enables precise timing control in high-frequency resonant topologies |
| VDD UVLO Threshold | 10.5 V (turn-on), 8.5 V (turn-off) – prevents erratic switching during power-up/down transients |
| VB UVLO Threshold | 9.5 V (turn-on), 7.5 V (turn-off) – ensures reliable high-side gate drive under bootstrap capacitor droop |
| Delay Matching | ±25 ns – minimizes dead-time uncertainty between high- and low-side outputs |
Pinout & Package
IRS21956SPBF is housed in a 20-pin SOIC package with exposed thermal pad (SOIC-20W), optimized for high-power density motor drive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Low-side supply input | Provides power for logic and low-side driver; requires local 10–22 µF decoupling |
| IN | PWM input | Accepts TTL/CMOS-compatible signal to control both high- and low-side outputs |
| SD | Shutdown input | Active-low input that disables both outputs and resets internal logic |
| HO | High-side output | Drives gate of high-side N-channel device; referenced to floating VS node |
| VS | High-side source reference | Return path for high-side driver; connects to switch node between high- and low-side devices |
| VB | High-side floating supply | Bootstrap-supplied rail; must be ≥12 V above VS for proper high-side turn-on |
| LO | Low-side output | Drives gate of low-side N-channel device; referenced to ground (COM) |
| COM | Ground reference | Logic and low-side return; must be connected to system power ground |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | 0.47 Ω forward resistance reduces external component count and improves reliability over discrete diode solutions |
| Matched propagation delays | ±25 ns inter-channel skew enables consistent dead-time implementation without external compensation |
| Independent UVLO monitoring | Dual undervoltage lockout circuits prevent partial drive conditions on either side during brownout events |
| Non-overlap logic | Hardware-enforced minimum 500 ns dead time prevents simultaneous conduction in half-bridge configurations |
Applications
| BLDC Motor Inverter | Induction Motor Drive |
|---|---|
Use Scenario: 3-phase inverter driving 1–3 kW brushless DC motors in HVAC blowers and industrial fans. IC Role / Device Role / Timing Role: Half-bridge gate driver providing synchronized, shoot-through-protected gate signals to six external MOSFETs. Use Value: Integrated bootstrap diode and matched delays reduce BOM count and improve torque ripple consistency at 20 kHz PWM. | Use Scenario: Variable-frequency drive controlling 0.75–2.2 kW induction motors in pump and conveyor systems. IC Role / Device Role / Timing Role: Gate driver stage translating controller PWM into high-current gate pulses with robust noise immunity on VS node. Use Value: 600 V high-side rating and ±50 V transient tolerance ensure stable operation during IGBT switching-induced voltage spikes. |
| Resonant DC-DC Converter | Appliance Main Inverter |
Use Scenario: LLC resonant converter in server PSUs delivering 500 W at >95% efficiency. IC Role / Device Role / Timing Role: High-frequency half-bridge driver enabling ZVS operation with precise timing control. Use Value: 150 ns propagation delay and ±25 ns matching support accurate phase-shift control at 300–500 kHz switching frequencies. | Use Scenario: Main inverter stage in premium washing machines with direct-drive drum motors. IC Role / Device Role / Timing Role: Isolated gate driver interface between MCU and power stage, handling 400 V DC link. Use Value: Dual UVLO thresholds and active shutdown (SD) enable safe fault response during stall or overcurrent events. |
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 |
|---|---|---|---|
| IR2110PbF | Higher 500 ns propagation delay; no integrated bootstrap diode; requires external diode and higher VB decoupling | Suitable for lower-frequency (<100 kHz) industrial inverters where timing precision is less critical | Select when cost sensitivity outweighs layout simplicity and timing performance |
| UCC27211D | 60 V max high-side voltage; no floating channel; designed for low-side + high-side dual low-side configuration | Limited to sub-100 V DC bus applications such as e-bike controllers or small UPS modules | Choose only for low-voltage, space-constrained designs where 600 V capability is unnecessary |
Compared with IR2110PbF, IRS21956SPBF reduces external component count and improves timing accuracy; versus UCC27211D, it enables direct integration into 400 V AC-input systems without level-shifting circuitry.
Availability
IRS21956SPBF is available at Aetrix Electronics and suitable for BLDC motor inverters, industrial variable-frequency drives, and resonant DC-DC power supplies requiring stable component supply and long-term manufacturability.
Supply support for IRS21956SPBF 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
Infineon Technologies is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.
The IRS21956SPBF belongs to Infineon's high-voltage gate driver product line, engineered for robust half-bridge control in motor drives and switched-mode power supplies operating up to 600 V DC bus.
FAQ
What is the recommended bootstrap capacitor value for IRS21956SPBF?
A 0.1 µF ceramic capacitor plus a 1–10 µF electrolytic or tantalum capacitor is recommended across VB and VS. The ceramic provides high-frequency charge replenishment during switching, while the bulk capacitor sustains voltage during extended low-side on-time. Total capacitance must maintain VB ≥12 V above VS under worst-case duty cycle and load.
Does IRS21956SPBF require an external level-shifter for microcontroller interfacing?
No. IRS21956SPBF accepts standard 3.3 V or 5 V logic-level PWM inputs directly on its IN pin. Its input threshold is compatible with TTL and CMOS logic families, eliminating need for external level-shifting circuitry when driven by common MCUs or DSPs.
Can IRS21956SPBF drive IGBTs as well as MOSFETs?
Yes. With ±2.5 A peak output current and 150 ns propagation delay, IRS21956SPBF is qualified to drive both fast-switching MOSFETs and medium-speed IGBTs used in motor drives and industrial inverters. Gate resistor selection must be adjusted per device gate charge and desired switching speed.
Is the thermal pad on the SOIC-20W package electrically connected?
No. The exposed thermal pad on the IRS21956SPBF SOIC-20W package is electrically isolated and intended solely for thermal conduction. It must be soldered to a large copper pour connected to the PCB ground plane for optimal thermal performance, but no electrical connection to any internal node is required or recommended.
IRS21956SPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- International Test Instruments Corporation
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- IGBT, N-Channel MOSFET
- Voltage - Supply:
- 10V ~ 20V
- Logic Voltage - VIL, VIH:
- 0.8V, 3.5V
- Current - Peak Output (Source, Sink):
- 500mA, 500mA
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 600 V
- Rise / Fall Time (Typ):
- 25ns, 15ns
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
IRS21956SPBF FAQ
1.How can I place an order for IRS21956SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS21956SPBF 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 IRS21956SPBF reliable?
The price and inventory of IRS21956SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS21956SPBF is usually 5 days.
3.What payment methods are accepted for IRS21956SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS21956SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS21956SPBF?
IRS21956SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS21956SPBF 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 IRS21956SPBF?
For technical support, including IRS21956SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS21956SPBF requirements.
6.How does Aetrix verify that IRS21956SPBF is sourced from the original manufacturer or authorized distributors?
All IRS21956SPBF 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 IRS21956SPBF meets industry standards.
7.What is the process for return or replacement of IRS21956SPBF?
All IRS21956SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS21956SPBF, 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 IRS21956SPBF part is unused and in its original packaging.
Return procedure for IRS21956SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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