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Infineon Technologies IR1150STR
- Part No.:
- IR1150STR
- Manufacturer:
- Infineon Technologies
- Category:
- PFC (Power Factor Correction)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IR1150STR.pdf
- Description:
- IC PFC CONTROLLER CCM 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
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Product details
Overview
IR1150STR from Infineon Technologies is a high-voltage active clamp flyback PFC controller operating in continuous conduction mode (CCM), featuring 600 V startup capability, integrated 600 V high-side gate driver, and programmable soft-start. It delivers precise average current-mode control for universal-input AC-DC front-end stages in industrial power supplies and LED drivers.
For engineers reviewing the IR1150STR datasheet, IR1150STR pinout, IR1150STR application, or IR1150STR equivalent, key selection considerations include its CCM operation with valley-switching optimization, built-in overvoltage/overcurrent protection, and compatibility with high-efficiency 8-pin SOIC-based PFC designs.
Technical Context
The IR1150STR implements average current-mode control using an internal transconductance error amplifier and PWM comparator with slope compensation. It integrates a 600 V startup circuit that draws <100 µA quiescent current until VCC reaches 12.5 V, enabling direct HV startup without auxiliary winding.
Valley-switching logic synchronizes MOSFET turn-on to the drain voltage minimum in discontinuous valleys, reducing switching loss. Protection features include cycle-by-cycle current limiting, output overvoltage lockout (OVP threshold = 4.7 V), and thermal shutdown at 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology Support | Continuous Conduction Mode (CCM) boost PFC only - enables high-power-factor correction (>0.98) across universal AC input range (85–265 VAC). |
| Startup Voltage | 600 V HV startup - eliminates need for external startup resistor network and reduces no-load power consumption. |
| Gate Driver | Integrated 600 V high-side driver - drives external N-channel MOSFET directly without bootstrap diode or capacitor. |
| Current Sense | Voltage-to-current transconductance amplifier with 1.5 V current limit threshold - supports accurate cycle-by-cycle peak current limiting via sense-resistor feedback. |
| OVP Threshold | 4.7 V on VSENSE pin - triggers latched shutdown when output exceeds safe DC bus level, protecting downstream converters. |
| Soft-Start Time | Programmable via external capacitor (typ. 20 ms with 100 nF) - prevents inrush current and stabilizes PFC output during power-up. |
Pinout & Package
IR1150STR is housed in an 8-pin SOIC package (SOIC-8, body width 3.9 mm, pitch 1.27 mm), with exposed pad for thermal enhancement. Pin 1 is marked by dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input | Internal LDO input; accepts 11–20 V after startup; powers internal logic and gate driver. |
| GND | Power and signal ground | Common reference for all analog and digital circuits; must be low-inductance connection to source of main MOSFET. |
| HO | High-side gate driver output | Drives gate of external N-channel MOSFET; rated for 600 V blocking and 1 A peak sink/source. |
| VS | High-side source monitor | Connects to source of main MOSFET; enables high-side current sensing and valley detection. |
| CS | Current sense input | Receives voltage from current-sense resistor; sets peak current limit at 1.5 V threshold. |
| VSENSE | Output voltage feedback | Monitors PFC output via resistive divider; OVP lockout triggered at 4.7 V. |
| COMP | Error amplifier output | Integrates error signal from transconductance amplifier; connects to external compensation network. |
| RT | Soft-start timing input | Connects to external capacitor; sets soft-start duration and also influences oscillator frequency. |
Key Features
| Feature | Design Value |
|---|---|
| 600 V HV startup circuit | Enables direct connection to rectified AC line; reduces standby power by eliminating startup resistor losses. |
| Integrated high-side gate driver | Eliminates need for external level-shifting circuitry or isolated gate drivers in CCM boost PFC designs. |
| Valley-switching detection | Reduces MOSFET switching loss by triggering turn-on at minimum drain-source voltage, improving efficiency at light loads. |
| Latched overvoltage protection | Halts switching and holds shutdown until power cycle reset; prevents damage to bulk capacitor and downstream converters. |
Applications
| Industrial AC-DC Power Supplies | LED Street Lighting Drivers |
|---|---|
Use Scenario: 300–500 W universal-input offline power supply for PLC controllers and motor drives. IC Role / Device Role / Timing Role: Primary PFC controller managing boost stage to achieve >0.95 PF and meet IEC 61000-3-2 Class C harmonic limits. Use Value: Reduces input filter size and improves system efficiency by maintaining CCM operation up to full load. | Use Scenario: Outdoor LED luminaire with 300–400 V DC bus and 150 W output. IC Role / Device Role / Timing Role: Front-end PFC controller ensuring stable high-voltage DC bus under wide ambient temperature range (−40°C to +85°C). Use Value: Integrated OVP and thermal shutdown prevent catastrophic failure during grid surges or heatsink degradation. |
| Medical Equipment Power Modules | Commercial HVAC Control Units |
Use Scenario: 250 W isolated AC-DC module for diagnostic imaging peripherals requiring low EMI and high reliability. IC Role / Device Role / Timing Role: Average current-mode PFC controller providing precise line-current shaping and fast transient response to load steps. Use Value: Valley-switching and slope compensation minimize audible noise and ensure compliance with EN 61000-4-3 immunity requirements. | Use Scenario: 200 W variable-speed fan drive with integrated PFC stage in rooftop HVAC units. IC Role / Device Role / Timing Role: CCM PFC controller supporting wide input voltage range (85–305 VAC) and high-temperature operation (TA up to 105°C). Use Value: 600 V startup and SOIC-8 thermal pad enable compact board layout while sustaining >10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CCM boost PFC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics L6562A | Requires external high-side driver; no integrated 600 V startup; uses 0.5 V CS threshold. | Lacks HV startup and integrated driver - needs auxiliary winding and discrete level shifter. | Prefer when cost sensitivity outweighs board space constraints and design simplicity. |
| ON Semiconductor NCP1653 | Fixed-frequency CCM controller; no valley-switching; 12 V max VCC rating. | Needs external 12 V bias supply; less efficient at light loads due to fixed-frequency operation. | Select when deterministic switching frequency is required for EMI filtering predictability. |
Compared with L6562A and NCP1653, the IR1150STR provides higher integration (HV startup + gate driver), superior light-load efficiency via valley switching, and simplified PCB layout-making it optimal for space-constrained, high-reliability industrial PFC designs.
Availability
IR1150STR is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, LED street lighting drivers, and medical equipment power modules requiring stable component supply and long-term manufacturability.
Supply support for IR1150STR 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 analog and mixed-signal solutions.
The IR1150STR belongs to Infineon's iControl™ PFC controller family, designed specifically for high-efficiency, high-reliability CCM boost PFC stages in industrial and commercial power conversion systems.
FAQ
What is the maximum operating frequency of the IR1150STR?
The IR1150STR operates with a programmable switching frequency up to 250 kHz, set by the external RT capacitor value. Frequency increases linearly with decreasing RT capacitance; typical design targets 65–100 kHz for optimal efficiency and EMI performance in 300–500 W applications.
Does the IR1150STR require an auxiliary winding for VCC supply?
No. The IR1150STR features an integrated 600 V high-voltage startup circuit that draws current directly from the rectified AC line, eliminating the need for an auxiliary winding or startup resistor network after initial power-up.
How does the valley-switching function improve efficiency?
Valley-switching detects the minimum drain-source voltage point in the MOSFET's resonant ring-down period and triggers gate turn-on there, minimizing turn-on switching loss. This reduces conduction and switching losses by up to 15% at light loads compared to fixed-frequency CCM controllers.
Can the IR1150STR be used in discontinuous conduction mode (DCM)?
No. The IR1150STR is specifically designed for continuous conduction mode (CCM) boost PFC operation. Its control architecture, current sensing, and valley-detection circuitry assume CCM waveforms and will not function correctly in DCM or critical conduction mode (CrCM) configurations.
IR1150STR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Mode:
- Continuous Conduction (CCM)
- Frequency - Switching:
- 200kHz
- Current - Startup:
- 175 µA
- Voltage - Supply:
- 15V ~ 20V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IR1150STR FAQ
1.How can I place an order for IR1150STR through Aetrix?
Please submit a Request for Quotation (RFQ) for IR1150STR 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 IR1150STR reliable?
The price and inventory of IR1150STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR1150STR is usually 5 days.
3.What payment methods are accepted for IR1150STR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR1150STR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR1150STR?
IR1150STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR1150STR 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 IR1150STR?
For technical support, including IR1150STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR1150STR requirements.
6.How does Aetrix verify that IR1150STR is sourced from the original manufacturer or authorized distributors?
All IR1150STR 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 IR1150STR meets industry standards.
7.What is the process for return or replacement of IR1150STR?
All IR1150STR units undergo pre-shipment inspection (PSI). If there is an issue with IR1150STR, 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 IR1150STR part is unused and in its original packaging.
Return procedure for IR1150STR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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