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Infineon Technologies IRS21531DPBF
- Part No.:
- IRS21531DPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Gate Drivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
IRS21531DPBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,933
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Product details
Overview
IRS21531DPBF from Infineon Technologies is a self-oscillating 600 V half-bridge gate driver IC with integrated bootstrap FET, 0.6 µs typical deadtime, 180 mA/260 mA source/sink current, and 15.4 V VCC zener clamp. It drives high-side and low-side MOSFETs in offline SMPS, CFL/LED ballasts, and resonant converters.
For engineers reviewing the IRS21531DPBF datasheet, IRS21531DPBF pinout, IRS21531DPBF application, or IRS21531DPBF equivalent, key selection criteria include oscillator programmability via RT/CT, dV/dt immunity (±50 V/ns), micropower startup current (130 µA), and UVLO hysteresis (2.0 V).
Technical Context
The IRS21531DPBF implements a CMOS-based 555-timer-like oscillator front-end with CT ramping between 4.66 V and 9.32 V, triggering internal logic to generate complementary HO/LO outputs. Its HVIC process enables direct 600 V floating operation referenced to VS.
Deadtime is fixed at 0.6 µs (typ.) via internal delay circuitry-shorter than the IRS2153D's 1.1 µs-enabling higher-frequency operation up to 100 kHz. The integrated bootstrap FET eliminates external diode requirements while sourcing 55 mA at VB = 13.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOFFSET | 600 V max - supports direct connection to rectified AC line without level-shifting circuitry |
| Deadtime | 0.6 µs typ. - reduces shoot-through risk in high-frequency half-bridge topologies |
| IO+/IO− | 180 mA / 260 mA - sufficient to drive 1 nF gate capacitance with <220 ns rise time |
| VCC Clamp | 15.4 V typ. - protects internal logic from overvoltage; requires current-limited VCC supply |
| dV/dt Immunity | ±50 V/ns - ensures reliable operation during fast VS node transitions in bridge configurations |
| Startup Current | 130 µA typ. - enables low-power auxiliary supply design for offline systems |
| Oscillator Freq | 88–100 kHz - programmable via RT (1–100 kΩ) and CT (330 pF–10 nF) |
Pinout & Package
IRS21531DPBF is housed in an 8-lead SOIC package (body width 3.9 mm, lead pitch 1.27 mm), RoHS-compliant and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RT) | Oscillator timing resistor input | Sets oscillator frequency and duty cycle; internal pull-up enables UVLO-triggered shutdown when CT < 1/6×VCC |
| 2 (CT) | Oscillator timing capacitor node | Charges/discharges between 4.66 V and 9.32 V to define switching period; fault detection threshold at 2.3 V |
| 3 (COM) | Logic ground reference | Common return for VCC, LO, and control logic; isolated from VS and VB domains |
| 4 (VCC) | Logic supply input | Powered by auxiliary winding or DC supply; clamped at 15.4 V to protect internal circuitry |
| 5 (LO) | Low-side gate driver output | Drives N-channel MOSFET source to COM; sink capability dominates for fast turn-off |
| 6 (VS) | Floating supply return | Reference node for high-side driver; must withstand −5 V negative spikes during switching |
| 7 (HO) | High-side gate driver output | Drives N-channel MOSFET source to VS; operates with bootstrap-supplied VB voltage |
| 8 (VB) | Bootstrap supply input | Receives charge via internal FET and external bootstrap capacitor; regulates at ~13.7 V |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap FET | Eliminates external bootstrap diode; delivers 55 mA at 13.7 V to sustain VB during continuous conduction |
| Non-latched CT shutdown | Triggers immediate disable when CT falls below 1/6×VCC, enabling soft-restart after overcurrent events |
| Micropower startup | Draws only 130 µA before VCC reaches UVLO threshold, reducing auxiliary supply burden |
| ±50 V/ns dV/dt immunity | Prevents false triggering during rapid VS transients in high dv/dt bridge environments |
| Internal deadtime | Fixed 0.6 µs prevents simultaneous HO/LO conduction without external timing components |
Applications
| Compact Fluorescent Lamp Ballast | LED Driver for AC Mains |
|---|---|
Use Scenario: Driving resonant half-bridge in electronic ballasts for T5/T8 lamps with 220–240 VAC input. IC Role / Device Role / Timing Role: Self-oscillating gate driver generating complementary 50% duty-cycle outputs synchronized to resonant tank zero-voltage switching. Use Value: Eliminates external oscillator and level-shifters; 0.6 µs deadtime enables stable 40–60 kHz operation with minimal EMI. | Use Scenario: High-efficiency constant-current LED driver for street lighting using bridgeless PFC + half-bridge LLC topology. IC Role / Device Role / Timing Role: Controls high-side/low-side MOSFETs in LLC primary side; RT/CT sets resonant frequency and regulates light output via frequency modulation. Use Value: Integrated 15.4 V clamp protects logic under wide-input-voltage transients; ±50 V/ns immunity maintains reliability during lightning surge tests. |
| Offline SMPS Auxiliary Supply | Induction Heating Half-Bridge |
Use Scenario: Generating regulated 15 V auxiliary supply for main controller ICs in 300 W industrial SMPS. IC Role / Device Role / Timing Role: Drives low-Rds(on) MOSFETs in self-oscillating flyback/half-bridge configuration powered directly from rectified line. Use Value: Micropower startup (130 µA) allows use of high-value startup resistors; 600 V VOFFSET avoids isolation transformers. | Use Scenario: Driving 1200 V SiC MOSFETs in 20–50 kHz resonant heating inverters for cooktops and industrial furnaces. IC Role / Device Role / Timing Role: Gate driver with robust VS node handling and fast 120 ns rise time to minimize switching losses in high-dI/dt loads. Use Value: Internal bootstrap FET sustains VB >13 V even at 50 kHz; dV/dt immunity prevents misfiring during rapid load transients. |
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 deadtime (vs. 0.6 µs); no internal bootstrap FET | Requires external bootstrap diode; lower max frequency due to longer deadtime | Select when legacy compatibility or cost sensitivity outweighs need for integrated FET and tighter deadtime |
| IR21531PbF | Same core architecture but PDIP-8 package; identical electrical specs | Preferred for through-hole prototyping or high-temperature PCB layouts requiring thermal mass | Select for manual assembly, thermal testing, or where SOIC reflow constraints exist |
Compared with IRS2153DPBF, the IRS21531DPBF offers faster switching via shorter deadtime and reduced BOM count via integrated bootstrap FET; versus IR21531PbF, it provides superior thermal performance and board space savings in SOIC-8.
Availability
IRS21531DPBF is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, offline SMPS auxiliary supplies, and induction heating inverters requiring stable component supply across extended production lifecycles.
Supply support for IRS21531DPBF 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 drivers and silicon carbide solutions.
The IRS2153x family targets cost-sensitive, self-oscillating half-bridge applications in lighting, appliance, and industrial power conversion-designed to replace discrete oscillator+driver combinations with monolithic reliability.
FAQ
What is the minimum recommended CT capacitor value for stable oscillation?
The datasheet specifies a minimum CT value of 330 pF for stable oscillator operation across temperature and supply variations. Using smaller values risks jitter, frequency drift, or failure to start-especially below 250 pF where internal comparator noise dominates timing accuracy.
Can IRS21531DPBF drive SiC MOSFETs directly?
Yes-it can drive SiC MOSFETs with gate charges ≤25 nC at 50–100 kHz, provided layout minimizes parasitic inductance and bootstrap capacitor (≥0.22 µF) is placed near VB/VS pins. Its 260 mA sink current ensures fast turn-off critical for SiC devices.
How does the CT pin shutdown function during overload?
When CT voltage drops below 2.3 V (1/6 × VCC), the IC disables both HO and LO outputs immediately without latching. Recovery occurs automatically once CT recharges above 2.3 V, enabling hiccup-mode protection during sustained overloads or short circuits.
Is external bootstrap diode required with IRS21531DPBF?
No-the device integrates a bootstrap FET that replaces the external diode. A standard 0.1–0.22 µF ceramic bootstrap capacitor between VB and VS is still required, but no series diode is needed, reducing component count and forward-voltage drop losses.
IRS21531DPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
IRS21531DPBF FAQ
1.How can I place an order for IRS21531DPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS21531DPBF 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 IRS21531DPBF reliable?
The price and inventory of IRS21531DPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS21531DPBF is usually 5 days.
3.What payment methods are accepted for IRS21531DPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS21531DPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS21531DPBF?
IRS21531DPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS21531DPBF 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 IRS21531DPBF?
For technical support, including IRS21531DPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS21531DPBF requirements.
6.How does Aetrix verify that IRS21531DPBF is sourced from the original manufacturer or authorized distributors?
All IRS21531DPBF 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 IRS21531DPBF meets industry standards.
7.What is the process for return or replacement of IRS21531DPBF?
All IRS21531DPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS21531DPBF, 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 IRS21531DPBF part is unused and in its original packaging.
Return procedure for IRS21531DPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IRS21531DPBF Tags
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