AUIRS21271STR - 600V High-Side Gate Driver, 290mA | Infineon
料号： AUIRS21271STR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.29 | $1.29 |
| 10 | $1.16 | $11.60 |
| 100 | $1.04 | $104.00 |
| 500 | $0.93 | $465.00 |
| 1,000 | $0.83 | $830.00 |
AUIRS21271STR 概述
A gate driver is a power-management IC that sits between a low-power controller (MCU, DSP, or logic gate) and a high-power switching device such as a MOSFET, IGBT, or GaN transistor. Gate drivers belong to the broader family of PMIC (Power Management IC) gate driver ICs, which are themselves part of the power management semiconductor category. High-side gate drivers like the AUIRS21271STR switch the high-side of a half-bridge or floating load referenced to a switching node, providing level shifting and bootstrap-compatible drive in compact surface-mount packages.
Key differentiating features of the AUIRS21271STR include 80 ns typical rise time and 40 ns typical fall time, an integrated over-current comparator with an external sense input, and automotive-grade qualification per AEC-Q100. The single-channel topology simplifies PCB routing compared to half-bridge drivers, while the 600 V absolute maximum rating provides ample margin for 400 V or 500 V bus systems typical of EV traction and industrial drives.
Architecturally, the part uses a level-shifted high-side drive stage with an internal charge pump and a current-sense amplifier path that compares the CS pin against an internal threshold. The non-inverting input logic requires a single logic-level PWM signal from the controller. The IC draws a low quiescent current from VCC and is qualified for automotive temperature ranges, making it suited for under-hood and chassis electronics.
Typical applications include automotive DC-DC converters, traction inverter gate drivers, industrial motor drives, and switch-mode power supplies (SMPS) where the load is high-side referenced. The part is also used in plug-in hybrid (EV) onboard chargers, solar inverters, and welding equipment. Designers value the integrated over-current protection, which reduces external component count and BOM cost.
When designing with this driver, ensure that the bootstrap capacitor is sized to maintain VBS above the UVLO threshold during the high-side on-time, and that the CS pin filter network rejects switching noise to avoid false over-current trips. A local 0.1 µF ceramic decoupling capacitor on VCC placed within 5 mm of the pin is essential.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-brand equivalents and PCB layout guidance.
直接替换替代料： AUIRS21271STR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AUIRS21271STR （相同外形与封装尺寸） ——差异在于 Package, Driver Type, Logic Input Compatibility, MSL Level, Over-Current Protection.
快速对比工具——选择替代料号进行并排对比：
AUIRS21271S
✅ 直接替换📋 参考替代料（不在目录中）
IRS21271STRPBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.02 / 个
查看数据手册 →IRS2127STRPBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.28 / 个
查看数据手册 →AUIRS21271STR 最大额定值与电气特性
| Driver Type | High-Side Gate Driver |
| Configuration | Non-Inverting |
| Number of Channels | 1 |
| Maximum Offset (Bootstrap) Voltage | 600 V |
| Supply Voltage (VCC) | 10 V to 20 V |
| Output Current (Source/Sink) | 290 mA / 290 mA (typ) |
| 上升时间 | 80 ns (typ) |
| 下降时间 | 40 ns (typ) |
| Propagation Delay | 175 ns (typ) |
| 封装 | 8-SOIC (SOIC-8) |
| 安装类型 | Surface Mount |
| Automotive Grade | AEC-Q100 Qualified |
| Over-Current Protection | Yes (integrated CS comparator) |
| RoHS 状态 | Compliant |
AUIRS21271STR 引脚配置
| 引脚 1 | VCC — Logic supply voltage (10 V to 20 V) |
| 引脚 2 | IN — Logic input for gate drive signal |
| 引脚 3 | GND — Logic ground reference |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | CS — Current sense input for over-current protection |
| 引脚 6 | COM — High-side return / bootstrap return |
| 引脚 7 | VB — Bootstrap supply for high-side driver |
| 引脚 8 | HO — High-side gate drive output |
典型应用
AUIRS21271STR 适用于 6 应用s: Automotive DC-DC Converters, EV Traction Inverter Gate Drivers, Industrial Motor Drives, Switch-Mode Power Supplies (SMPS), Solar Inverter Power Stages, On-Board Chargers (Plug-in Hybrid/EV).
Automotive DC-DC Converters
The AUIRS21271STR drives the high-side N-channel MOSFET in 48 V to 12 V automotive DC-DC converter stages. Its 600 V maximum rating and AEC-Q100 qualification suit under-hood environments, while 290 mA gate drive current can switch MOSFETs with total gate charge Qg up to approximately 30 nC at switching frequencies up to 100 kHz. The integrated CS comparator protects against output over-current conditions without a dedicated external monitor IC, reducing BOM by 2-3 components.
推荐
EV Traction Inverter Gate Drivers
In electric vehicle traction inverters, the AUIRS21271STR drives individual IGBT or SiC MOSFET high-side switches in auxiliary or pre-charge stages. The 600 V offset rating exceeds typical 400 V battery bus voltages with substantial margin for transients. Its 175 ns propagation delay supports deterministic PWM timing in torque-control loops, while automotive-grade qualification per AEC-Q100 allows direct qualification for chassis and powertrain ECUs. The integrated over-current protection enables cycle-by-cycle current limiting during motor regeneration.
推荐
Industrial Motor Drives
Industrial motor drives use the AUIRS21271STR to switch high-side power devices in variable-frequency drives (VFDs) up to 480 VAC class. The 600 V rating comfortably exceeds rectified 380 VAC bus voltage (~537 VDC), and the 290 mA drive strength handles IGBT modules in the 20-50 A class. The CS pin senses shunt-resistor current and trips the driver off within microseconds, protecting the IGBT from short-circuit events. A bootstrap diode and 1 µF ceramic capacitor complete the high-side supply.
推荐
Switch-Mode Power Supplies (SMPS)
Off-line SMPS designs for industrial power supplies use the AUIRS21271STR as the high-side primary-side MOSFET driver in flyback, forward, or half-bridge converters. The 80 ns rise and 40 ns fall times support switching frequencies of 100-200 kHz typical of modern SMPS. The integrated over-current protection eliminates an external comparator, while AEC-Q100 qualification provides headroom in harsh industrial environments with high ambient temperatures and vibration. Bootstrap supply is typically 1 µF to 4.7 µF.
推荐
Solar Inverter Power Stages
Solar inverter boost and buck stages operate at DC bus voltages up to 600 VDC, well within the AUIRS21271STR's 600 V absolute maximum rating. The driver switches high-side IGBTs or MOSFETs with Qg up to 30 nC and propagation delay of 175 ns, supporting PWM frequencies up to 100 kHz. The CS over-current protection is essential for short-circuit detection in photovoltaic strings. Automotive-grade qualification is overkill but provides long-term reliability margin in outdoor installations.
推荐
On-Board Chargers (Plug-in Hybrid/EV)
Plug-in hybrid and electric vehicle on-board chargers (OBCs) convert 110/220 VAC to 400 VDC battery bus voltages, requiring high-side switching stages that operate reliably in harsh automotive thermal environments. The AUIRS21271STR's 600 V rating and AEC-Q100 qualification make it suitable for the PFC and DC-DC high-side stages of OBC modules. The integrated CS comparator simplifies the current-mode control loop and provides hardware-level over-current protection independent of the MCU firmware, a critical safety feature for automotive chargers.
推荐
推荐产品汇总
工程参考数据： AUIRS21271STR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AUIRS21271S | IRS21271STRPBF | IRS2127STRPBF |
|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | 8-SOIC | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) |
| Maximum Offset Voltage | 600 V | 600 V | 600 V | 600 V |
| Output Current | 290 mA | 290 mA | 290 mA | 290 mA |
| Propagation Delay | 175 ns | 175 ns | 175 ns | 175 ns |
| Automotive Grade (AEC-Q100) | Yes | Yes | No | No |
| Over-Current Protection | Yes (integrated CS comparator) | Yes (integrated CS comparator) | Yes (integrated CS comparator) | No |
| Configuration | Non-Inverting, Single Channel | Non-Inverting, Single Channel | Non-Inverting, Single Channel | Non-Inverting, Single Channel |
| Packaging | Tape & Reel (2500 pcs) | Tube (100 pcs) | Tape & Reel (2500 pcs) | Tape & Reel (2500 pcs) |
关键差异点
- Integrated over-current protection comparator on CS pin （对比 IRS2127STRPBF)
- Automotive AEC-Q100 qualification （对比 IRS21271STRPBF)
- Tape and reel packaging for high-volume assembly （对比 AUIRS21271S)
设计说明
Bootstrap capacitor sizing is critical for high-side operation. Estimated: for 100 kHz switching, Qg=20 nC, and 10% ripple tolerance on VBS, the minimum bootstrap capacitance is approximately C_boot >= Qg * 2 / (0.1 * VCC) = 0.08 µF. Use 0.1 µF to 1 µF ceramic X7R for typical applications. Place the bootstrap diode (UF4007 or similar fast-recovery) in series with VCC to VB, with the cathode at VB.
Place the VCC decoupling capacitor (0.1 µF X7R ceramic) within 5 mm of pin 1 with a short, wide ground return to pin 3. The CS pin filter (typically 100 Ω and 1 nF RC) must be located within 10 mm of pin 5 to reject switching noise and avoid false over-current trips. Keep high-voltage traces (VB, HO, COM) away from logic signals by at least 3 mm to prevent dv/dt coupling.
Do not exceed 600 V offset on the high-side rail - this is the absolute maximum and brief transients can permanently damage the device. Ensure the CS pin voltage does not exceed its absolute maximum rating during fault conditions; add a TVS clamp if the shunt inductance is high. The NC pin (pin 4) MUST be left floating or grounded - connecting it to VCC will inject noise into the substrate and may cause latch-up.
合规信息
AEC-Q100 qualified per Infineon automotive-grade product line. RoHS and REACH compliant per product page. Lead-free and halogen-free per datasheet materials declaration.
