Home > Integrated Circuits ICs > IRS21864STRPBF

IRS21864STRPBF

600V half-bridge gate driver, 4A, SOIC-14, 170ns, 3.3V logic, UVLO, dV/dt immune

11509

Effective Inventory

Go to Inquiry

Image for reference only

Manufacturer Part：

IRS21864STRPBF

Package：

SOIC-14 (8.65 x 3.90 x 1.50 mm, 14N package)

Description

Product Overview

The IRS21864STRPBF from Infineon (formerly IR) is a 600V high and low side gate driver in a SOIC-14 package. With 4A source/sink output current, 170ns propagation delay, and independent high/low side channels, it drives IGBTs and MOSFETs in half-bridge power conversion circuits.

Key Specifications

Offset Voltage	600 V (high-side bootstrap)
Output Current	+4A / -4A (source/sink)
Gate Drive Supply	10 V to 20 V
Propagation Delay	170 ns typical (matched H/L)
Rise/Fall Time	22 ns / 18 ns typical
Logic Input	3.3V and 5V compatible
UVLO Threshold	8.9V (both channels)
Operating Temperature	-40C to +125C

Features

600V high-side bootstrap operation for half-bridge IGBT/MOSFET driving
4A peak source/sink output current for fast gate charging
3.3V and 5V logic-compatible inputs with matched propagation delays
Undervoltage lockout on both high-side and low-side channels
dV/dt immune and tolerant to negative transient voltage
SOIC-14 package with separate VSS logic ground for noise immunity

Applications

Motor drive half-bridge inverter gate driving at 600V bus
Switch-mode power supply half-bridge converter control
Solar inverter and UPS IGBT/MOSFET gate driving
Induction heating and welding equipment power stage

Product Introduction:IRS21864STRPBF Product Introduction

The IRS21864STRPBF from Infineon (formerly International Rectifier) is a high-voltage, high-speed gate driver IC with independent high-side and low-side referenced output channels in a SOIC-14 package. The proprietary HVIC and latch-immune CMOS technologies enable rugged monolithic construction. The floating high-side channel is designed for bootstrap operation and can drive an N-channel MOSFET or IGBT operating at up to 600V. The 4A peak output current (source and sink) provides fast gate charging and discharging for efficient switching of power devices. The logic inputs are compatible with standard CMOS or LSTTL outputs, down to 3.3V logic levels. The matched propagation delay of 170ns typical for both channels ensures symmetrical half-bridge operation. Undervoltage lockout (UVLO) on both channels prevents insufficient gate drive voltage during startup or supply brownout conditions. The high-side channel is tolerant to negative VS transients and dV/dt immune, ensuring reliable operation in noisy power conversion environments. The SOIC-14 version (IRS21864) provides a separate VSS logic ground pin for improved noise immunity, allowing the logic ground to be offset from the power ground by up to +/-5V.

Working Principle:IRS21864STRPBF Working Principle

The IRS21864STRPBF uses a level-shifting architecture to drive high-side and low-side power switches. (1) Low-Side Channel: The low-side driver is directly referenced to COM (power ground). When LIN goes high, the output LO drives the gate of the low-side switch to VCC through the output buffer. (2) High-Side Channel: The high-side driver is referenced to the floating VS node (the switch node of the half-bridge). When HIN goes high, a short pulse is generated and level-shifted across the high-voltage isolation barrier to set the latch that drives HO high. The bootstrap capacitor between VB and VS provides the floating supply for the high-side driver. (3) Bootstrap Operation: The bootstrap capacitor is charged from VCC through the bootstrap diode when VS is low (low-side switch on). When the high-side switch turns on, VS rises to the bus voltage, and the bootstrap capacitor provides the gate drive voltage (VB – VS) for the high-side switch. (4) UVLO: Both channels have undervoltage lockout that disables the output when the respective supply voltage (VCC for low-side, VB-VS for high-side) falls below the threshold (8.9V typical), preventing partial gate drive that could cause excessive power dissipation in the switch.

Pin Description:IRS21864STRPBF Pin Definition and Functions

Pin	Name	Type	Function
1	VCC	Power	Logic and low-side supply (10-20V)
2	HIN	Input	High-side logic input
3	LIN	Input	Low-side logic input
4	VSS	Ground	Logic ground (IRS21864)
5	NC	–	No connection
6	NC	–	No connection
7	LO	Output	Low-side gate drive output
8	COM	Ground	Power ground
9	NC	–	No connection
10	NC	–	No connection
11	NC	–	No connection
12	VB	Power	High-side floating supply
13	HO	Output	High-side gate drive output
14	VS	Power	High-side floating return

Application Scenarios:In which products and applications isIRS21864STRPBF used

Motor drive half-bridge inverter gate driving at 600V with 4A output
Switch-mode power supply half-bridge converter control with UVLO
Solar inverter and UPS IGBT/MOSFET gate driving with dV/dt immunity
Induction heating and welding equipment power stage at 170ns delay

Alternative Models:What chips are recommended as replacements for IRS21864STRPBF

Manufacturer	Part Number	Package	Notes
Infineon	IRS2186STRPBF	SOIC-8	8-pin version, no separate VSS
Infineon	IR2110STRPBF	SOIC-14	2A, 500V, classic driver
TI	UCC27714DR	SOIC-14	600V, 4A, similar function
Infineon	2ED21084S06FXUMA1	DSO-14	650V, SOI, newer