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Infineon Technologies IRS21531DSTRPBF
- Part No.:
- IRS21531DSTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IRS21531DSTRPBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,441
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Product details
Overview
IRS21531DSTRPBF from Infineon Technologies is a self-oscillating 600 V half-bridge gate driver IC with integrated bootstrap FET, 0.6 µs typical deadtime, 15.4 V VCC zener clamp, and 180 mA/260 mA source/sink current. It drives high-side and low-side MOSFETs in offline SMPS, CFL/LED ballasts, and resonant converters.
For engineers reviewing the IRS21531DSTRPBF datasheet, IRS21531DSTRPBF pinout, IRS21531DSTRPBF application, or IRS21531DSTRPBF equivalent, key selection criteria include oscillator programmability via RT/CT, dV/dt immunity (±50 V/ns), micropower startup current (130–170 µA), and SOIC-8 package compatibility with board-level thermal management.
Technical Context
The IRS21531DSTRPBF integrates a CMOS 555-style oscillator front-end with HVIC-level-shifted outputs, enabling autonomous half-bridge switching without external timing controllers. Its internal deadtime generator enforces 0.6 µs minimum separation between HO and LO transitions to prevent shoot-through.
It features non-latched shutdown triggered when CT voltage drops below 1/6 × VCC, and a dedicated 15.4 V zener clamp on VCC that regulates supply rail integrity during transient load conditions - critical for stable operation in unregulated rectified-line supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOFFSET | 600 V max - supports direct connection to rectified AC mains up to 400 VDC with margin |
| Deadtime | 0.6 µs typ. - ensures safe commutation in high-frequency half-bridge topologies |
| VCC Clamp | 15.4 V typ. - internal zener limits supply rail to protect logic and drivers under overvoltage |
| Driver Current | 180 mA source / 260 mA sink - sufficient to drive 1 nF gate capacitance at >100 kHz |
| Oscillator Freq | 88–100 kHz (RT = 7.15–36.9 kΩ, CT = 1 nF) - enables adjustable switching frequency for EMI optimization |
| dV/dt Immunity | ±50 V/ns - maintains reliable operation during fast high-side switching transients |
| Startup Current | 130–170 µA - minimizes power loss during initial power-up before bootstrap capacitor charges |
Pinout & Package
IRS21531DSTRPBF is housed in an 8-lead SOIC package (SO8) with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Thermal resistance RthJA = 128 °C/W under still-air conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RT) | Oscillator timing resistor input | Sets oscillator frequency with external resistor; open-circuit disables oscillation |
| 2 (CT) | Oscillator timing capacitor input | Forms RC network with RT; voltage threshold detection triggers shutdown if <1/6×VCC |
| 3 (COM) | Power and signal ground reference | Common return for VCC, LO, and control logic; must be low-inductance path to minimize noise coupling |
| 4 (VCC) | Logic and gate drive supply input | Powered externally; internally clamped at 15.4 V; requires ≥5 mA for stable operation |
| 5 (LO) | Low-side gate driver output | Drives N-channel MOSFET source-connected to COM; referenced to COM |
| 6 (VS) | Floating supply return | Reference node for high-side driver; tied to low-side MOSFET source in half-bridge configuration |
| 7 (HO) | High-side gate driver output | Drives N-channel MOSFET source-connected to VS; level-shifted and isolated from COM |
| 8 (VB) | High-side floating supply input | Connected to bootstrap capacitor; supplies gate drive for HO; must remain ≥8 V above VS |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap FET | Eliminates external diode and reduces component count in bootstrap supply path |
| Non-latched CT shutdown | Allows automatic recovery after transient overcurrent without requiring reset pulse |
| Micropower startup | Enables reliable start-up from weak auxiliary supplies before bootstrap capacitor charges |
| ±50 V/ns dV/dt immunity | Prevents false triggering during rapid high-side voltage transitions in noisy bridge environments |
| Internal deadtime | Hardware-enforced 0.6 µs delay prevents simultaneous conduction of high- and low-side switches |
Applications
| Compact Fluorescent Lamp Ballast | LED Driver for AC Mains |
|---|---|
Use Scenario: Driving resonant half-bridge in electronic ballasts for 18–40 W CFL lamps powered directly from rectified AC line. IC Role / Device Role / Timing Role: Self-oscillating gate driver providing synchronized HO/LO outputs with fixed 50% duty cycle and programmable frequency. Use Value: Eliminates need for external oscillator and level-shifter; internal 15.4 V clamp protects against rectifier ripple-induced overvoltage. | Use Scenario: Powering isolated LED arrays in streetlight and industrial lighting using flyback-derived half-bridge topology. IC Role / Device Role / Timing Role: High-voltage gate driver controlling primary-side MOSFETs with built-in bootstrap FET and UVLO protection. Use Value: Micropower startup (130 µA) enables reliable ignition from low-power auxiliary windings; ±50 V/ns immunity suppresses false triggering during dimming transients. |
| Offline SMPS | Induction Heating Inverter |
Use Scenario: Half-bridge stage in 100–300 W offline switch-mode power supplies with universal AC input (85–265 VAC). IC Role / Device Role / Timing Role: Autonomous gate driver generating complementary outputs with hardware deadtime and VCC regulation. Use Value: Internal 600 V rating allows direct integration into high-side floating domain; 0.6 µs deadtime balances efficiency and shoot-through risk at 100 kHz. | Use Scenario: Driving parallel MOSFETs in 1–3 kW induction heating inverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Robust high-current gate driver with latch-immune outputs and fast rise/fall times (120/50 ns). Use Value: 260 mA sink current ensures rapid turn-off of large gate capacitances; dV/dt immunity prevents spurious switching during high di/dt load currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar self-oscillating half-bridge driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS2153DPBF | 1.1 µs typical deadtime vs. 0.6 µs; same SOIC-8 package and pinout | Lower switching frequency ceiling due to longer deadtime; less suitable for >100 kHz designs | Select when lower gate drive speed suffices and legacy design reuse is prioritized |
| IR21531PBF | DIP-8 package only; identical electrical specs but no SOIC option | Not suitable for surface-mount production; higher thermal resistance (85 °C/W vs. 128 °C/W) | Select only for through-hole prototyping or legacy DIP-based systems |
Compared with IRS2153DPBF and IR21531PBF, the IRS21531DSTRPBF offers optimal trade-off between high-frequency capability (0.6 µs deadtime), surface-mount manufacturability (SOIC-8), and thermal performance - making it preferred for new compact, high-efficiency offline converters.
Availability
IRS21531DSTRPBF is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, offline SMPS, and LED drivers requiring stable component supply across industrial production cycles.
Supply support for IRS21531DSTRPBF 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 management, automotive, and industrial control ICs, with leadership in high-voltage gate driver technology.
The IRS2153x family targets cost-sensitive, self-contained half-bridge applications where integration of oscillator, level-shifting, and protection reduces BOM count - especially in lighting and auxiliary power supplies.
FAQ
What is the function of the CT pin in IRS21531DSTRPBF?
The CT pin connects to an external capacitor that forms the oscillator timing network with the RT resistor. Its voltage ramps between 4.66 V and 9.32 V to set frequency; dropping below 2.3 V triggers non-latched shutdown. This provides both timing control and fault detection without external circuitry.
Can IRS21531DSTRPBF drive SiC MOSFETs?
No - IRS21531DSTRPBF is optimized for silicon MOSFETs with gate thresholds near 4–5 V. Its 15.4 V VCC clamp and 180 mA source current are insufficient for robust SiC gate driving, which typically requires >20 V gate bias and faster slew rates than this IC supports.
How does the internal bootstrap FET improve system design?
The integrated bootstrap FET replaces the traditional bootstrap diode, reducing forward voltage drop and enabling faster recharge of the VB capacitor during high-duty-cycle operation. This improves reliability in continuous conduction mode and eliminates one discrete component and its associated PCB footprint and parasitic inductance.
Is IRS21531DSTRPBF RoHS compliant and halogen-free?
Yes - the "PbF" suffix confirms lead-free (RoHS-compliant) construction, and Infineon's official product documentation states full compliance with JEDEC JS709E halogen-free requirements for this device family, including bromine and chlorine content limits.
IRS21531DSTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 10V ~ 15.4V
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- 180mA, 260mA
- Input Type:
- RC Input Circuit
- High Side Voltage - Max (Bootstrap):
- 600 V
- Rise / Fall Time (Typ):
- 120ns, 50ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IRS21531DSTRPBF FAQ
1.How can I place an order for IRS21531DSTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS21531DSTRPBF 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 IRS21531DSTRPBF reliable?
The price and inventory of IRS21531DSTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS21531DSTRPBF is usually 5 days.
3.What payment methods are accepted for IRS21531DSTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS21531DSTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS21531DSTRPBF?
IRS21531DSTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS21531DSTRPBF 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 IRS21531DSTRPBF?
For technical support, including IRS21531DSTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS21531DSTRPBF requirements.
6.How does Aetrix verify that IRS21531DSTRPBF is sourced from the original manufacturer or authorized distributors?
All IRS21531DSTRPBF 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 IRS21531DSTRPBF meets industry standards.
7.What is the process for return or replacement of IRS21531DSTRPBF?
All IRS21531DSTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS21531DSTRPBF, 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 IRS21531DSTRPBF part is unused and in its original packaging.
Return procedure for IRS21531DSTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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