Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Infineon Technologies IRS21856STRPBF

Name: IRS21856STRPBF
Brand: Infineon Technologies
SKU: IRS21856STRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IRS21856STRPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: IRS21856STRPBF.pdf

Description:: IC GATE DRVR HALF-BRIDGE 14SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,465

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

IRS21856STRPBF from Infineon Technologies is a high-voltage, high-speed half-bridge gate driver IC with integrated bootstrap diode, 600 V high-side voltage rating, 1.4 A peak source/sink current, and 120 ns propagation delay. It drives N-channel MOSFETs or IGBTs in motor control inverters and DC-DC resonant converters.

For engineers reviewing the IRS21856STRPBF datasheet, IRS21856STRPBF pinout, IRS21856STRPBF application, or IRS21856STRPBF equivalent, key selection criteria include bootstrap-enabled high-side drive capability, matched propagation delays between high- and low-side channels, under-voltage lockout thresholds for both sides, and SOIC-14 thermal performance in 48 V industrial motor drives.

Technical Context

This driver implements independent high- and low-side output stages with non-overlapping logic to prevent shoot-through. It features separate IN and SD inputs with TTL/CMOS-compatible thresholds, and internal level-shifting for high-side operation up to 600 V DC bus.

UVLO is implemented separately on both high- and low-side supplies (V_BS and V_CC), with turn-on thresholds at 10.1 V / 9.8 V and hysteresis of 0.7 V. The device operates from –40 °C to 125 °C ambient and supports switching frequencies up to 100 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Half-bridge gate driver with independent high-/low-side outputs
Max High-Side Voltage	600 V - supports 400–450 V DC bus systems with margin
Peak Output Current	±1.4 A - sufficient to drive 10 nF gate capacitance at 50 ns rise/fall
Propagation Delay	120 ns - ensures tight timing control in synchronous rectification
UVLO Thresholds	V_CC: 9.8 V (on) / 9.1 V (off); V_BS: 10.1 V (on) / 9.4 V (off)
Operating Temp	–40 °C to +125 °C - qualified for industrial motor drive environments

Pinout & Package

IRS21856STRPBF is housed in a 14-pin SOIC package with exposed thermal pad (SOIC-14 NB), rated for 1.2 W power dissipation at T_A = 70 °C.

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Low-side supply input	Provides power for logic and low-side driver stage; requires 10–20 V
V_BS	Bootstrap supply input	Connects to bootstrap capacitor; enables floating high-side drive up to 600 V
HIN	High-side input	TTL/CMOS-compatible signal controlling high-side output (HO)
LIN	Low-side input	TTL/CMOS-compatible signal controlling low-side output (LO)
HO	High-side gate output	Drives gate of high-side N-channel MOSFET/IGBT referenced to floating VS node
LO	Low-side gate output	Drives gate of low-side N-channel MOSFET/IGBT referenced to ground
V_S	High-side return	Source connection point for high-side switch; serves as floating reference for HO
COM	Low-side return	Ground reference for LO, LIN, V_CC, and logic circuitry

Key Features

Feature	Design Value
Integrated bootstrap diode	Eliminates external diode, reducing BOM count and layout area in half-bridge designs
Matched propagation delays	Ensures <±10 ns skew between HO and LO edges for precise dead-time control
Dual independent UVLO	Prevents erratic switching by disabling outputs if either V_CC or V_BS falls below threshold
Non-overlap logic	Guarantees minimum 500 ns dead time between HO and LO transitions to avoid shoot-through

Applications

Brushless DC Motor Drive

Induction Motor Inverter

Use Scenario: 3-phase BLDC inverter for HVAC blowers and power tools operating from 24–48 V DC bus.

IC Role / Device Role / Timing Role: Half-bridge gate driver providing synchronized, shoot-through-protected gate signals to three half-bridge legs.

Use Value: Integrated bootstrap diode and matched delays simplify PCB layout and improve commutation timing accuracy at 20–50 kHz PWM.

Use Scenario: Variable-frequency drive for 0.5–2 kW industrial induction motors fed from 380 V AC rectified to ~540 V DC bus.

IC Role / Device Role / Timing Role: High-voltage gate driver enabling robust high-side switching with 600 V blocking capability and fast 120 ns response.

Use Value: Dual UVLO ensures safe shutdown during brownout conditions on both high- and low-side supplies, preventing partial conduction faults.

Resonant LLC Converter

UPS Half-Bridge Stage

Use Scenario: Primary-side half-bridge in 1–3 kW telecom/server LLC resonant DC-DC converters.

IC Role / Device Role / Timing Role: Gate driver delivering precise, low-jitter gate timing to high-frequency GaN FETs or Si MOSFETs.

Use Value: 1.4 A peak current and 120 ns delay support clean 300–500 kHz switching with minimal gate ringing and EMI.

Use Scenario: Bidirectional half-bridge in online UPS inverters converting 400 V DC bus to 230 V AC output.

IC Role / Device Role / Timing Role: Reliable high-side driver with thermal robustness for continuous 50/60 Hz line-frequency modulation plus PWM bursts.

Use Value: SOIC-14 NB package with exposed pad enables stable thermal performance at 1.2 W dissipation in sealed UPS enclosures.

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
IR21844STRPBF	Same pinout, no integrated bootstrap diode; requires external diode and higher board area	Limited to lower-power designs where layout space is not constrained	Choose when legacy design reuse or cost-sensitive BOM optimization outweighs integration benefit
FAN7382MX	Lower 500 V high-side rating; 0.65 A peak output; no UVLO on V_BS	Suitable only for ≤300 V DC bus systems with reduced gate drive strength	Select only for cost-driven consumer-grade inverters with relaxed voltage and drive requirements

Compared with IR21844STRPBF and FAN7382MX, IRS21856STRPBF delivers superior integration (integrated bootstrap diode), higher voltage margin (600 V), and dual UVLO-making it optimal for industrial 48 V–400 V systems requiring reliability and layout simplicity.

Availability

IRS21856STRPBF is available at Aetrix Electronics and suitable for industrial motor drives, resonant DC-DC converters, and UPS inverters requiring stable component supply across multi-year production cycles.

Supply support for IRS21856STRPBF 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 management, automotive, and industrial control ICs, with global manufacturing and qualification standards.

The IRS218xx family targets high-reliability half-bridge gate driving in motor control and power conversion, emphasizing robust high-side operation, integrated protection, and thermal resilience.

FAQ

What is the purpose of the V_S pin on IRS21856STRPBF?

V_S is the high-side return terminal and serves as the floating reference node for the high-side driver stage. It connects directly to the source of the high-side MOSFET and enables level-shifted gate drive relative to the switching node. This pin must be routed with low-inductance traces to minimize noise coupling and ensure stable high-side operation up to 600 V.

Does IRS21856STRPBF require an external bootstrap diode?

No. IRS21856STRPBF integrates a bootstrap diode internally between V_CC and V_BS, eliminating the need for an external diode. This reduces bill-of-materials count, saves PCB area, and improves reliability by removing a potential failure point in high-vibration or thermally cycled environments.

Can IRS21856STRPBF drive IGBTs directly?

Yes. With ±1.4 A peak output current and 120 ns propagation delay, IRS21856STRPBF can directly drive medium-power IGBTs (up to 50 A, 600 V) used in motor inverters and UPS systems. Gate resistor selection must ensure gate charge delivery within required switching times while limiting peak current to within the driver's rating.

How does the dual UVLO function protect the system?

The dual UVLO independently monitors V_CC (low-side supply) and V_BS (bootstrap supply). If either drops below its respective turn-off threshold (9.1 V or 9.4 V), both HO and LO outputs are forced low. This prevents partial turn-on of power switches, avoiding shoot-through, overheating, or bus short-circuits during supply transients or capacitor discharge.

IRS21856STRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

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:: 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):: 30ns, 20ns

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

IRS21856STRPBF FAQ

1.How can I place an order for IRS21856STRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS21856STRPBF 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 IRS21856STRPBF reliable?

The price and inventory of IRS21856STRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS21856STRPBF is usually 5 days.

3.What payment methods are accepted for IRS21856STRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS21856STRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS21856STRPBF?

IRS21856STRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS21856STRPBF 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 IRS21856STRPBF?

For technical support, including IRS21856STRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS21856STRPBF requirements.

6.How does Aetrix verify that IRS21856STRPBF is sourced from the original manufacturer or authorized distributors?

All IRS21856STRPBF 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 IRS21856STRPBF meets industry standards.

7.What is the process for return or replacement of IRS21856STRPBF?

All IRS21856STRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS21856STRPBF, 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 IRS21856STRPBF part is unused and in its original packaging.

Return procedure for IRS21856STRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…