IRS2308STRPBF - 600V Half-Bridge Gate Driver | Infineon
MPN: IRS2308STRPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.96 | $0.96 |
| 10 | $0.86 | $8.60 |
| 100 | $0.72 | $72.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.54 | $540.00 |
IRS2308STRPBF Overview
A half-bridge gate driver is a power-management IC that produces two synchronized gate-drive signals (high-side and low-side) for the two switches in a half-bridge converter topology. In the broader taxonomy, it belongs to gate drivers -> power MOSFET/IGBT drivers -> power management ICs -> integrated circuits. These drivers sit between a low-voltage logic controller (3.3 V CMOS or LSTTL) and the high-power switching devices, providing level shifting, dead-time control, and shoot-through protection that discrete gate-drive circuits cannot deliver reliably at high dV/dt.
Key features include integrated shoot-through protection, 220 ns typical delay time, and a floating channel designed for bootstrap operation. The output drivers feature a high pulse current buffer stage designed for minimum driver cross-conduction. The IRS2308 is fully operational to +600 V, tolerant to negative transient voltage and high dV/dt, and offers undervoltage lockout (UVLO) protection for both VCC and VBS supplies to prevent the power switches from operating in a partially-enhanced linear region.
Architecturally, the IRS2308 uses a level-shifted high-side channel with a floating bootstrap supply (VBS) referenced to the switching node (VS), enabling true ground-referenced low-side control while the high-side driver swings with the phase node. This eliminates the need for an isolated bias supply and significantly simplifies half-bridge, full-bridge, and three-phase inverter designs. Logic inputs are compatible with 3.3 V CMOS or LSTTL outputs, allowing direct connection to microcontrollers and DSPs.
Typical applications include motor drive inverters, switch-mode power supplies (SMPS), uninterruptible power supplies (UPS), solar inverters, induction cooking, and general-purpose high-voltage half-bridge converters. Its 600 V rating makes it a strong fit for 120/230 V AC line-rectified bus applications up to 400 VDC.
When designing with this part, ensure the bootstrap capacitor and diode are sized for the high-side quiescent current and the maximum switching frequency. Place the VCC bypass capacitor (typically 0.1 uF ceramic) as close as possible to pins 1 and 8, and keep the gate-drive loop area minimal to limit ringing at the power switch gate.
Drop-in alternatives for IRS2308STRPBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with IRS2308STRPBF (same form factor and footprint) β differing in Configuration, Number of Outputs, Package, Operating Temperature Range, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
IRS2308SPBF
β Drop-Inβ In Stock
$0.92 / Unit
View Datasheet βIR2104STRPBF
β Drop-Inβ In Stock
$0.59 / Unit
View Datasheet βIR2104SPBF
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
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View Datasheet βIRS2308STRPBF Maximum Ratings & Electrical Characteristics
| Configuration | Half-Bridge |
| Driver Type | High-Side / Low-Side, Non-Inverting |
| Number of Outputs | 2 (High Side and Low Side) |
| High-Side Offset Voltage | Up to +600 V |
| Supply Voltage (VCC, VBS) | 10 V to 20 V |
| Source Current (typical) | 0.29 A |
| Sink Current (typical) | 0.6 A |
| Logic Input Compatibility | 3.3 V CMOS / LSTTL |
| Delay Time (typical) | 220 ns |
| Bootstrap Supply | Floating channel designed for bootstrap operation |
| UVLO | Undervoltage lockout on VCC and VBS |
| Protection Features | Shoot-through protection, UVLO, negative transient voltage tolerance, dV/dt immunity |
| Operating Temperature | -40C to +125C |
| Package | 8-SOIC (0.154 inch / 3.90 mm width) |
| Mounting Type | Surface Mount |
| Packaging | Tape and Reel |
| RoHS Status | Compliant |
IRS2308STRPBF Pin Configuration
| Pin 1 | VCC β Low-side and logic supply voltage (10 V to 20 V) |
| Pin 2 | HIN β Logic input for high-side output (3.3 V CMOS/LSTTL compatible) |
| Pin 3 | LIN β Logic input for low-side output (3.3 V CMOS/LSTTL compatible) |
| Pin 4 | GND β Logic and low-side driver ground |
| Pin 5 | LO β Low-side gate drive output |
| Pin 6 | VS β High-side floating supply return (switching node reference) |
| Pin 7 | HO β High-side gate drive output |
| Pin 8 | VB β High-side floating bootstrap supply |
Typical Applications
IRS2308STRPBF is suitable for 6 applications: Motor Drive Inverter (3-Phase Variable Frequency Drive), Switch-Mode Power Supply (Half-Bridge / Full-Bridge Topology), Uninterruptible Power Supply (UPS) - Line-Interactive / Online, Solar Microinverter / String Inverter, Induction Cooking / Induction Heating, Electronic Ballast / HID Lighting.
Motor Drive Inverter (3-Phase Variable Frequency Drive)
The IRS2308STRPBF drives the six switches of a 3-phase VFD inverter with three half-bridge stages. Its 600 V high-side rating covers 400-480 VAC class drives with margin; the 0.6 A sink current cleanly turns off 600 V/10-20 A IGBT modules within 220 ns, limiting switching losses. Integrated shoot-through protection prevents cross-conduction during the dead-time window - a critical feature when driving large IGBT modules where shoot-through would draw hundreds of amps and destroy the switch leg. Bootstrap operation eliminates isolated bias supplies, reducing the gate-drive PCB area by 50% compared to opto-isolated or transformer-coupled designs.
Recommended
Switch-Mode Power Supply (Half-Bridge / Full-Bridge Topology)
In a 600 V half-bridge or full-bridge SMPS, the IRS2308STRPBF provides synchronized high-side and low-side gate drive for the primary-side switches. The 600 V floating channel rating supports 350-400 VDC bus operation from universal mains input, while 3.3 V logic-compatible inputs allow direct connection to a UC3842-family or digital controller. The 220 ns propagation delay keeps dead-time predictable, simplifying ZVS (zero-voltage switching) timing. Bootstrap supply (VBS) eliminates the need for an auxiliary isolated bias, reducing BOM cost and PCB area in telecom and industrial SMPS designs.
Recommended
Uninterruptible Power Supply (UPS) - Line-Interactive / Online
Online UPS systems use a high-frequency PWM inverter stage to convert battery DC into clean AC mains output. The IRS2308STRPBF drives the half-bridge inverter switches with 600 V headroom for 220 VAC output. Its integrated UVLO on VCC and VBS prevents the IGBTs from operating in the linear region during battery undervoltage conditions, which would otherwise cause thermal runaway. The 0.6 A sink current is well matched to 600 V/20-50 A IGBT modules common in 1-3 kVA UPS systems. Shoot-through protection is especially valuable here because a shoot-through event during a mains glitch could blow the battery fuse and disable the entire UPS.
Recommended
Solar Microinverter / String Inverter
Single-phase string solar inverters up to 3 kW typically operate from 400 VDC PV bus and produce 230 VAC grid output. The IRS2308STRPBF's 600 V rating provides 50% voltage margin above the maximum PV open-circuit voltage, supporting 1500 VDC PV string applications when paired with appropriate IGBTs. Bootstrap operation allows a compact, low-cost gate-drive layout for the full-bridge unfolding stage. The integrated shoot-through protection is required in transformerless topologies where any cross-conduction would create a ground fault and trip the residual-current device.
Recommended
Induction Cooking / Induction Heating
Induction cooktops use a resonant half-bridge or full-bridge inverter driving an induction coil at 20-100 kHz. The IRS2308STRPBF's 220 ns delay and 0.6 A sink current can drive 600 V/30-50 A IGBTs at 30 kHz, delivering 1-3 kW per cooking zone. The bootstrap supply is appropriate for fixed-frequency operation; for variable-frequency designs with very long low-side on-times, a charge-pump or isolated bias may be preferred. The 600 V rating supports universal mains input (90-265 VAC) with a rectified 400 VDC bus.
Recommended
Electronic Ballast / HID Lighting
High-intensity discharge (HID) and fluorescent electronic ballasts use a half-bridge resonant inverter to drive the lamp at high frequency. The IRS2308STRPBF provides 600 V headroom for universal mains and the 0.6 A sink current cleanly switches the half-bridge IGBTs or MOSFETs. Its UVLO ensures the switches remain off during ballast startup when the bus capacitor is still charging, preventing stress on the lamp filaments. The compact 8-SOIC package fits inside the small ballast enclosure common in commercial HID lighting fixtures.
Recommended
Recommended Products Summary
Engineering reference data for IRS2308STRPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRS2308SPBF | IR2104STRPBF | IR2104SPBF |
|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| High-Side Offset Voltage (max) | 600 V | 600 V | 600 V | 600 V |
| Source Current (typical) | 0.29 A | 0.29 A | 0.13 A | 0.13 A |
| Sink Current (typical) | 0.6 A | 0.6 A | 0.27 A | 0.27 A |
| Shoot-Through Protection | Yes (integrated) | Yes (integrated) | No | No |
| Supply Voltage Range | 10 V to 20 V | 10 V to 20 V | 10 V to 20 V | 10 V to 20 V |
| Logic Input Compatibility | 3.3 V CMOS / LSTTL | 3.3 V CMOS / LSTTL | 3.3 V CMOS / LSTTL | 3.3 V CMOS / LSTTL |
| RoHS Status | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Integrated shoot-through protection (vs IR2104STRPBF)
- Higher source and sink drive current (vs IR2104STRPBF)
- 600 V high-side rating with negative transient immunity (vs IR2104STRPBF)
Design Notes
Estimated: The IRS2308STRPBF itself draws low quiescent current (low-side VCC quiescent plus high-side VBS quiescent). For a half-bridge switching at 20 kHz with a 600 V/20 A IGBT, the bootstrap capacitor must supply the high-side quiescent current plus the gate charge per cycle (Q_g). A conservative rule is C_boot >= 10 * Q_g / (VCC - V_diode - V_GS_th). A 1 uF to 4.7 uF ceramic X7R in parallel with a small electrolytic typically provides clean bootstrap operation. Place the bootstrap diode (preferably a fast-recovery or Schottky) as close to pins 8 (VB) and 6 (VS) as possible to minimize parasitic inductance.
Keep the gate-drive loop (HO -> gate resistor -> IGBT gate/emitter -> VS -> pin 6 -> back to driver) as small as physically possible. The IRS2308STRPBF's 220 ns transition time produces dV/dt above 5 V/ns at the gate; even a 10 nH loop inductance will create ringing of several volts. Place the VCC bypass (0.1 uF ceramic + 10 uF tantalum or electrolytic) within 5 mm of pins 1 and 4. Use a 4-layer PCB with a continuous ground plane directly under the driver for best results.
Three common pitfalls: (1) Omitting the bootstrap capacitor or undersizing it causes the high-side drive to fail at high duty cycle or high switching frequency - the VBS voltage droops below the UVLO threshold and the high-side switch turns off unexpectedly. (2) Exposing the VS pin to negative transients below -0.7 V (relative to GND) without a clamp can damage the level-shift circuitry; in motor-drive and bridge applications, place a small Schottky diode from VS to GND to catch inductive kickback. (3) Driving an IGBT module (rather than a discrete MOSFET) requires a gate resistor; the IRS2308's 0.6 A sink current without a gate resistor will produce sub-100 ns switching edges that radiate significant EMI - a 10-33 ohm gate resistor is typical.
The 8-SOIC package has limited thermal dissipation (theta_JA approximately 150 C/W on a standard JEDEC 1s0p test board). At 25C ambient the package can dissipate about 800 mW. The IRS2308STRPBF does not dissipate significant power itself (it is a driver, not the switch), but if the gate is loaded heavily at high frequency the driver IC may warm up; increase PCB copper area around pins 1, 4, 5, and 8 (the dissipating pads) to keep junction temperature below 125C.
Compliance Information
RoHS compliant per Infineon product page. Lead-free and halogen-free per datasheet marking. Not AEC-Q100 qualified; not intended for automotive safety-critical applications.
