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

Infineon Technologies IRS21953SPBF

Name: IRS21953SPBF
Brand: Infineon Technologies
SKU: IRS21953SPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS21953SPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: IRS21953SPBF.pdf

Description:: IC GATE DRVR HALF BRD/LOW 16SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,899

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Product details

Overview

IRS21953SPBF 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 low-side sink/source current, and 150 ns propagation delay. It drives N-channel MOSFETs or IGBTs in motor control inverters and DC-DC converters.

For engineers reviewing the IRS21953SPBF datasheet, IRS21953SPBF pinout, IRS21953SPBF application, or IRS21953SPBF equivalent, key selection criteria include high-side floating capability, independent high/low-side input logic, undervoltage lockout thresholds (V_B UVLO = 10.5 V, V_CC UVLO = 9.5 V), and SOIC-16 thermal performance under continuous 1.2 A output load.

Technical Context

The IRS21953SPBF integrates dual independent input channels with non-inverting logic for high-side (HIN) and low-side (LIN) drive, enabling synchronous rectification and dead-time control via external circuitry. Its level-shifting circuit supports operation with VS swing up to 600 V referenced to COM.

It features separate high-side (VB–VS) and low-side (VCC–COM) supply rails, internal bootstrap diode, and overlapping input protection to prevent shoot-through. Propagation delay matching between channels is ±25 ns, supporting PWM frequencies up to 500 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
High-side max voltage	600 V - supports 400 V DC bus systems with 50% safety margin
Peak output current	±1.4 A - drives 10 nF gate capacitance at 100 ns rise/fall time
Propagation delay	150 ns - enables precise timing control in 500 kHz PWM inverters
V_B UVLO threshold	10.5 V (rising) / 9.5 V (falling) - prevents erratic switching during bootstrap capacitor discharge
Input logic type	CMOS-compatible, non-inverting - simplifies interface with MCU GPIO or PWM controllers
Operating temperature	−40 °C to 125 °C - qualified for industrial motor drive ambient conditions

Pinout & Package

IRS21953SPBF is housed in a 16-pin SOIC package with exposed thermal pad (SOIC-16NB), rated for 1.5 W power dissipation at T_A = 70 °C with 2-layer PCB copper pour.

Pin/Terminal	Circuit Role	Design Meaning
V_B	High-side floating supply	Bootstrap rail for high-side driver; requires external 0.1 µF ceramic + 1 µF electrolytic capacitor
V_S	High-side floating return	Reference node for high-side output; swings with phase node up to 600 V
HIN	High-side input	Non-inverting CMOS input controlling HO output; 3.3 V/5 V compatible
HO	High-side gate output	Drives N-channel MOSFET gate with ±1.4 A peak; referenced to VS
COM	Low-side common ground	Return path for LIN, LO, VCC, and bootstrap diode cathode
LO	Low-side gate output	Drives N-channel MOSFET gate with ±1.4 A peak; referenced to COM
LIN	Low-side input	Non-inverting CMOS input controlling LO output; 3.3 V/5 V compatible
V_CC	Low-side supply	10–20 V bias for low-side driver and logic; internal regulator powers inputs

Key Features

Feature	Design Value
Integrated bootstrap diode	Eliminates external diode, reducing BOM count and layout area in half-bridge power stages
Matched propagation delays	±25 ns inter-channel skew ensures consistent dead-time implementation across HIN/LIN paths
Independent UVLO monitoring	Separate V_B and V_CC undervoltage detection prevents partial drive and shoot-through risk
High dV/dt immunity	50 V/ns common-mode transient immunity on VS pin maintains reliable high-side operation

Applications

Brushless DC Motor Drive

Industrial Inverter

Use Scenario: 3-phase BLDC motor control in HVAC blowers and pump modules operating from 300–400 V DC bus.

IC Role / Device Role / Timing Role: Half-bridge gate driver providing isolated high-side switching and synchronized low-side drive for six-step commutation.

Use Value: 150 ns propagation delay and 50 V/ns dV/dt immunity ensure clean switching transitions without false triggering at 20 kHz PWM.

Use Scenario: 3 kW variable-frequency drive for conveyor belt motors in factory automation.

IC Role / Device Role / Timing Role: Gate driver stage translating MCU PWM signals into robust 600 V-capable gate drive for IGBT half-bridges.

Use Value: Independent V_B/V_CC UVLO prevents asymmetric turn-off during brown-out, avoiding DC bus short-circuit faults.

Solar Microinverter

Server PSU LLC Resonant Converter

Use Scenario: Single-phase grid-tied microinverter with split-phase transformerless topology and 600 V DC input.

IC Role / Device Role / Timing Role: High-side capable driver enabling bidirectional current sensing and reactive power control via synchronous rectification.

Use Value: Integrated bootstrap diode reduces component count and improves reliability over discrete bootstrap solutions in sealed outdoor enclosures.

Use Scenario: High-efficiency 1.5 kW server power supply using LLC resonant topology with synchronous rectification.

IC Role / Device Role / Timing Role: Low-side gate driver for SR FETs and high-side driver for primary-side half-bridge switches.

Use Value: 1.4 A peak output sustains fast 10 nF gate charge delivery at 700 kHz switching, minimizing conduction loss in SR MOSFETs.

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
IR2104SPBF	Single-input, self-oscillating dead-time generation; no independent HIN/LIN; 600 V rating retained	Targeted at cost-sensitive, fixed-frequency SMPS rather than programmable motor control	Select when dead-time is fixed and MCU resource constraints preclude external timing logic
FAN7382MX	Higher 2.5 A peak output; no integrated bootstrap diode; 600 V rating; 160 ns propagation delay	Used in high-current UPS inverters requiring faster gate charging but accepting added BOM complexity	Select when driving >15 nF gate loads or needing higher peak current at same frequency

Compared with IR2104SPBF, IRS21953SPBF offers independent input control essential for vector control algorithms; versus FAN7382MX, it trades off peak current for reduced layout complexity via integrated bootstrap diode and tighter propagation delay matching.

Availability

IRS21953SPBF is available at Aetrix Electronics and suitable for brushless DC motor drives, industrial inverters, solar microinverters, and server PSU resonant converters requiring stable component supply and long-term manufacturability.

Supply support for IRS21953SPBF 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 IRS21953SPBF belongs to Infineon's high-voltage gate driver product line, designed specifically for robust, high-efficiency half-bridge power conversion in motor control and renewable energy systems.

FAQ

What is the maximum recommended bootstrap capacitor value for IRS21953SPBF?

The datasheet specifies a minimum 0.1 µF ceramic capacitor directly at VB–VS, paired with a bulk 1–10 µF electrolytic capacitor. Exceeding 10 µF increases recharge time and risks V_B UVLO during high-duty-cycle operation above 90%, especially at 20 kHz and above. Typical designs use 1 µF tantalum or aluminum polymer for optimal trade-off between hold-up and ESR.

Does IRS21953SPBF support 3.3 V logic inputs without level shifting?

Yes - IRS21953SPBF has CMOS-compatible inputs with V_IL = 0.8 V (max) and V_IH = 2.5 V (min), fully compatible with 3.3 V MCU GPIOs. No external level shifter is required, and input hysteresis of 0.5 V prevents noise-induced switching near logic thresholds.

Can IRS21953SPBF drive IGBTs directly, or is a gate resistor mandatory?

A series gate resistor is mandatory for IGBT drive. The IC's ±1.4 A output capability supports typical 15–50 A IGBTs, but external R_G (typically 5–22 Ω) must be used to limit dI/dt, suppress oscillation, and control switching speed per IGBT safe operating area requirements.

How does the internal bootstrap diode affect thermal design in SOIC-16NB package?

The integrated diode conducts only during VB recharge (typically <100 ns per cycle), contributing <15 mW average power at 100 kHz. Its inclusion reduces thermal stress on adjacent traces but requires careful placement away from high-dV/dt nodes to avoid coupling; thermal pad soldering remains critical for overall 1.5 W package dissipation handling.

IRS21953SPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Driven Configuration:: Half-Bridge, Low-Side

Channel Type:: Independent

Number of Drivers:: 3

Gate Type:: N-Channel MOSFET

Voltage - Supply:: 10V ~ 20V

Logic Voltage - VIL, VIH:: 0.6V, 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, 25ns

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

IRS21953SPBF FAQ

1.How can I place an order for IRS21953SPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS21953SPBF 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 IRS21953SPBF reliable?

The price and inventory of IRS21953SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS21953SPBF is usually 5 days.

3.What payment methods are accepted for IRS21953SPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS21953SPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS21953SPBF?

IRS21953SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS21953SPBF 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 IRS21953SPBF?

For technical support, including IRS21953SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS21953SPBF requirements.

6.How does Aetrix verify that IRS21953SPBF is sourced from the original manufacturer or authorized distributors?

All IRS21953SPBF 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 IRS21953SPBF meets industry standards.

7.What is the process for return or replacement of IRS21953SPBF?

All IRS21953SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS21953SPBF, 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 IRS21953SPBF part is unused and in its original packaging.

Return procedure for IRS21953SPBF:

1.Submit a request within 90 days.

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

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