IRS21271STRPBF - 600V High-Side Gate Driver IC | Infineon
料号： IRS21271STRPBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.94 | $1.94 |
| 10 | $1.75 | $17.50 |
| 100 | $1.46 | $146.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.02 | $1,020.00 |
IRS21271STRPBF 概述
What is a high-side gate driver? A high-side gate driver is a power-management IC that level-shifts a low-voltage logic command (typically 3.3 V or 5 V from a microcontroller) up to the floating source connection of a high-side switch (such as the upper MOSFET in a half-bridge). Without a high-side driver, a controller cannot reliably turn on a switch whose source is floating on top of the bus voltage. High-side drivers sit inside the broader gate-driver hierarchy: gate driver -> half-bridge driver -> motor/power driver -> power management IC, and they are essential building blocks in motor drives, solar inverters, industrial SMPS, and automotive powertrain electronics.
Key features of the IRS21271STRPBF include integrated current-sense comparator input, dedicated FAULT output pin for hardware protection, dV/dt noise immunity, tolerance to negative transient voltages on the VS pin, and compatibility with bootstrap supply generation for the floating high-side rail. The 8-SOIC package is JEDEC-standard and supports automated SMT assembly lines.
Technically, the IRS21271STRPBF uses Infineon's proprietary HVIC (high-voltage integrated circuit) process combined with latch-immune CMOS, allowing the high-side channel to float up to 600 V continuously while the low-voltage logic stays referenced to ground. The internal current-sense comparator allows direct shunt-resistor monitoring without an external op-amp, which simplifies PCB layout and reduces BOM cost.
Typical applications include automotive 12 V and 24 V motor drives, HVAC blower and pump controls, e-bike and e-scooter inverter stages, solenoid and relay drivers, and small appliance BLDC/PMSM motor control. The over-current fault output is especially useful in safety-critical automotive subsystems.
When designing with this device, always include a bootstrap diode and capacitor on VB and VS to refresh the floating supply each switching cycle. Size the bootstrap capacitor to deliver at least 10x the total gate charge of the driven MOSFET/IGBT to keep VBS above the UVLO threshold. Use a low-ESR ceramic bypass cap on VCC and place the current-sense filter RC network within 5 mm of the CS pin to avoid false tripping.
直接替换替代料： IRS21271STRPBF ——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： IRS21271STRPBF （相同外形与封装尺寸） ——差异在于 Driver Type, Package, Configuration, Logic Input Compatibility, MSL Level.
快速对比工具——选择替代料号进行并排对比：
IRS2127STRPBF
✅ 直接替换✓ 有现货
$1.28 / 个
查看数据手册 →IRS21271SPBF
✅ 直接替换📋 参考替代料（不在目录中）
IRS21281STRPBF
✅ 直接替换📋 参考替代料（不在目录中）
IR2117STRPBF
✅ 直接替换✓ 有现货
$0.58 / 个
查看数据手册 →IR2114SSTRPBF
✅ 直接替换✓ 有现货
$1.84 / 个
查看数据手册 →IRS21271STRPBF 最大额定值与电气特性
| 功能 | High-Side Gate Driver with Current Sense and Fault Output |
| Number of Channels | 1 |
| Input Type | Non-Inverting |
| Maximum Offset (Bootstrap) Voltage | 600 V |
| Gate Drive Voltage Range | 9 V to 20 V (automotive VBS range) |
| VCC Supply Voltage | 12 V to 20 V |
| Source Current (typical) | 0.29 A |
| Sink Current (typical) | 0.6 A |
| Logic Input Compatibility | CMOS / LSTTL, down to 3.3 V |
| Current Sense Comparator | Integrated (CS pin with reference) |
| Fault Output | Yes (open-drain FAULT pin) |
| Floating Channel Transient Immunity | Negative VS transient tolerant, dV/dt immune |
| 工作温度范围 | -40C to +125C |
| 封装 | 8-SOIC (3.90 mm body width) |
| 安装类型 | Surface Mount |
| MSL 等级 | MSL 3 |
| Lead-Free / RoHS | Yes (PBF suffix indicates lead-free) |
IRS21271STRPBF 引脚配置
| 引脚 1 | VCC — Logic and low-side supply voltage (12V-20V) |
| 引脚 2 | IN — Logic input, non-inverting, CMOS/LSTTL compatible |
| 引脚 3 | CS — Current sense comparator input (vs internal reference) |
| 引脚 4 | FAULT — Open-drain fault output (active low on overcurrent) |
| 引脚 5 | GND — Logic ground return for VCC and input signals |
| 引脚 6 | VS — High-side floating supply return / load connection |
| 引脚 7 | VB — High-side floating supply (bootstrap) referenced to VS |
| 引脚 8 | HO — High-side gate drive output (referenced to VS) |
典型应用
IRS21271STRPBF 适用于 6 应用s: Automotive 12V / 24V Motor Drive, BLDC / PMSM Motor Control Half-Bridge, Solenoid and Relay Driver Module, E-Bike and E-Scooter Inverter, Small Appliance Universal Motor / BLDC Drive, Solar Micro-Inverter and Power Optimizer.
Automotive 12V / 24V Motor Drive
The IRS21271STRPBF's 600V floating channel and 9V-20V automotive-grade VBS range make it a strong fit for driving the high-side IGBT or MOSFET in 12V and 24V automotive motor half-bridges. Its integrated current-sense comparator with FAULT output eliminates an external op-amp, which is critical for compact ECU designs. The 0.29A source / 0.6A sink rating covers sub-1kW blower, pump, and HVAC actuators common in body and chassis ECUs. Cold-crank tolerance down to 9V VBS is explicitly supported per the automotive gate range.
推荐
BLDC / PMSM Motor Control Half-Bridge
In a 3-phase BLDC or PMSM inverter, the IRS21271STRPBF can drive one high-side switch per phase, paired with a low-side gate driver such as the IRS2003 or IR2104 on the same 8-SOIC footprint family. The 600V rating gives ample margin for 48V bus rails (max 60V rectified). The integrated CS pin allows per-phase current monitoring, enabling field-oriented control (FOC) without external current-sense amplifiers. The 0.6A sink current ensures fast turn-off of the high-side MOSFET, minimizing switching losses at 20kHz PWM.
推荐
Solenoid and Relay Driver Module
The IRS21271STRPBF suits high-side solenoid and relay switching because of its integrated fault reporting and 600V transient tolerance. For 12V/24V automotive relay coils and hydraulic solenoids, the high-side drive lets the controller ground one side of every coil, simplifying harness routing. The FAULT output interfaces directly to a microcontroller interrupt pin for hardware-managed overcurrent protection. 0.6A sink current rapidly de-energizes inductive loads, reducing flyback stress on the freewheel diode.
推荐
E-Bike and E-Scooter Inverter
In 36V-48V e-bike and e-scooter traction inverters, the IRS21271STRPBF drives the upper switch of each phase leg with 600V headroom for inductive ringing. The 9V-20V VBS range tolerates wide battery-pack voltage variations under load transients, which is critical during regen braking. Integrated current sensing enables torque-loop control without external shunt amplifiers, reducing BOM cost and PCB area in space-constrained battery enclosures. The -40C to +125C operating range covers outdoor winter and summer thermal extremes.
推荐
Small Appliance Universal Motor / BLDC Drive
White-goods and power-tool applications benefit from the IRS21271STRPBF's 600V rating in 120V/230V rectified mains environments where voltage spikes easily exceed 400V. The integrated CS comparator enables cost-effective overcurrent protection for universal motor and small BLDC drives in washing machines, vacuum cleaners, and handheld tools. The 8-SOIC footprint allows drop-in use with the IRS2127 in regions requiring different VBS ranges without PCB rework. Surface-mount construction supports automated high-volume manufacturing.
推荐
Solar Micro-Inverter and Power Optimizer
Micro-inverters and DC power optimizers in residential photovoltaic systems use 600V-class gate drivers to switch the high-side MOSFET in boost and full-bridge topologies. The IRS21271STRPBF's dV/dt immunity and negative-VS transient tolerance make it robust against the ringing common on long PV string harnesses. The integrated current-sense comparator with FAULT output enables per-panel arc-fault and over-current detection, supporting rapid-shutdown requirements. 9V-20V VBS range covers 24V-48V battery-based energy-storage variants.
推荐
推荐产品汇总
工程参考数据： IRS21271STRPBF ——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 | IRS2127STRPBF | IRS21271SPBF | IRS21281STRPBF | IR2117STRPBF | IR2114SSTRPBF |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | 8-SOIC | 8-SOIC - same | 8-PDIP - same die, different footprint | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Topology | 1-ch high-side + CS | 1-ch high-side + CS | 1-ch high-side + CS | 1-ch high-side + CS | 1-ch high-side (no CS) | Half-bridge (no CS) |
| Max Offset Voltage | 600 V | 600 V | 600 V | 600 V | 600 V | 600 V |
| VBS Gate Drive Range | 9 V - 20 V (automotive) | 12 V - 20 V (motor drive) | 9 V - 20 V (automotive) | 9 V - 20 V (automotive) | 10 V - 20 V | 10 V - 20 V |
| Current Sense Comparator | Yes (integrated) | Yes | Yes | Yes | No | No |
| FAULT Output | Yes (open-drain) | Yes | Yes | Yes | No | No |
| Input Logic Polarity | Non-Inverting | Non-Inverting | Non-Inverting | Inverting | Non-Inverting | Non-Inverting |
| RoHS / Lead-Free | Yes (PBF suffix) | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Integrated current-sense comparator and FAULT output （对比 IR2117STRPBF)
- Automotive-grade 9V-20V VBS gate drive range （对比 IRS2127STRPBF)
- Single high-side topology (not half-bridge) （对比 IR2114SSTRPBF)
设计说明
The bootstrap capacitor on VB (pin 7) must be sized to deliver at least 10x the total gate charge (Qg) of the driven MOSFET or IGBT per switching cycle. For a typical 50 nC Qg MOSFET at 20 kHz, this gives a required Q_bootstrap of 500 nC, equivalent to roughly 25 nF of voltage drop per cycle. A 0.1 uF to 1 uF ceramic X7R bootstrap cap is a practical starting point; insufficient capacitance causes VBS to dip below the UVLO threshold and skip switching pulses. Refresh the bootstrap with a fast-recovery diode (e.g. UF4007 or Schottky) from VCC to VB per Infineon's typical-application circuit.
Place the current-sense filter RC network within 5 mm of the CS pin (pin 3) to avoid false tripping from switching noise. Use a 100 ohm resistor and 1 nF capacitor as a starting filter, with the cap tied to GND (pin 5). Keep the high-side loop (VB to VS to HO to gate to source) physically small to minimize parasitic inductance that causes ringing on the gate drive. Place a local 0.1 uF ceramic bypass on VCC (pin 1) directly at the IC pin per Infineon datasheet layout guidelines.
Do not exceed the 600V absolute-maximum rating on VS (pin 6); transient overshoot on inductive loads can easily exceed this. Add a TVS or snubber across the high-side switch if the bus voltage can ring above 600V during hard turn-off. Also, the FAULT pin (pin 4) is open-drain and requires an external pull-up resistor (typically 10 kohm to VCC) - omitting the pull-up causes the FAULT signal to float and never reach a logic-low state. Estimated: a 10 kohm pull-up with VCC = 15 V gives a FAULT-low sink current budget of 1.5 mA, sufficient for direct microcontroller interrupt pins.
The 8-SOIC package has limited thermal dissipation (theta_JA typically 150 C/W on a 1 sq inch 2-layer board). At 20 kHz switching and 0.29A source current, the IC's internal dissipation is modest (<100 mW), so thermal management is rarely a concern for the IRS21271STRPBF. However, in a sealed enclosure at 85 C ambient, ensure the copper area around the exposed lead frame pad is maximized for heat spreading. No external heatsink is required under normal automotive or industrial conditions.
合规信息
RoHS compliant and lead-free per PBF suffix and Infineon product page. AEC-Q100 qualification status is not explicitly stated for IRS21271STRPBF (the variant with -Q1 suffix would carry AEC-Q100); confirmed lead-free per PBF designation. Halogen-free status not found in available data - marked unknown.
