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Infineon Technologies ICE2QS03HKLA1
- Part No.:
- ICE2QS03HKLA1
- Manufacturer:
- Infineon Technologies
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICE2QS03HKLA1.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,733
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Product details
Overview
ICE2QS03HKLA1 from Infineon Technologies is a quasi-resonant PWM controller IC for off-line flyback converters, featuring digital frequency reduction, active burst mode (standby power < 100 mW), and integrated VCC pre-charge power cell. It operates across 85–265 Vac input, supports ZC-based switch-on timing, and delivers cycle-by-cycle current limiting and latch-off OVP for LCD TV, CRT TV, and notebook adapter power supplies.
For engineers reviewing the ICE2QS03HKLA1 datasheet, ICE2QS03HKLA1 pinout, ICE2QS03HKLA1 application, or ICE2QS03HKLA1 equivalent, key selection criteria include zero-crossing detection accuracy, digital soft-start timing (12 ms), VCC operating range (9.5–26 V), burst-mode ripple control, and protection modes (OVP, UVP, open-loop, short-winding).
Technical Context
The ICE2QS03HKLA1 implements peak-current-mode control with dual-path decision logic: digital up/down counter + ZC counter governs switch-on timing based on feedback voltage (VFB) and demagnetization detection, while analog comparators determine switch-off using CS and FB signals. Its BiCMOS process enables 26 V VCC operation and low quiescent current.
Digital frequency reduction dynamically adjusts switching frequency by ignoring 1–7 zero crossings per cycle-mapped to VFB thresholds (VRH/VRM/VRL)-enabling QR operation down to light load. Active burst mode disables switching cycles entirely below threshold VFB, reducing standby consumption without compromising output regulation stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 9.5 V to 26 V - supports wide-input offline supplies with robust startup and brownout immunity |
| Standby Power | < 100 mW - achieved via active burst mode with controllable output ripple |
| Soft-Start Time | 12 ms (4-step digital ramp) - limits inrush stress on MOSFET, diode, and transformer |
| Zero-Crossing Detection | Digital ZC counter with ringing suppression - prevents false triggering during transformer ringback |
| Current Limit Threshold | 0.32 V to 1.0 V (soft-start ramped) - enables precise primary-side overcurrent protection |
| OVP Protection | Latch-off mode - triggered by ZC pin voltage exceeding internal threshold for fast output overvoltage shutdown |
| Startup Current Source | ~1.05 mA constant-current HV pin source - enables reliable VCC pre-charge independent of AC line level |
Pinout & Package
ICE2QS03HKLA1 is housed in PG-DIP-8 (dual in-line package, 8-pin, through-hole), with creepage/clearance optimized for 265 Vac isolation requirements and standard PCB assembly compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ZC | Zero-Crossing Input | Detects auxiliary winding voltage zero crossing for QR switch-on timing; also used for output OVP sensing |
| 2 FB | Feedback Input | Primary-side regulation signal path for PWM off-time, digital frequency reduction, and open-loop/overload protection |
| 3 CS | Current Sense Input | Connects to primary shunt resistor; enables cycle-by-cycle peak current limiting and short-winding detection |
| 4 & 5 HV | High-Voltage Startup Input | Provides constant-current (~1.05 mA) VCC pre-charge from rectified bus; dual pins reduce trace resistance |
| 6 GATE | Gate Drive Output | Push-pull driver capable of sourcing/sinking >1 A peak - directly drives external power MOSFET gate |
| 7 VCC | IC Supply Voltage | Regulated supply rail (9.5–26 V); powers all internal blocks; monitored for UVP/OVP auto-restart |
| 8 GND | Controller Ground | Reference node for all analog and digital circuitry; must be low-impedance connection to power ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Digital Frequency Reduction | Adjusts off-time by ignoring 1–7 zero crossings per cycle, mapped to VFB - maintains QR operation down to ~5% load |
| Active Burst Mode | Disables entire switching cycles at light/no load - achieves <100 mW standby while maintaining tight output voltage ripple |
| Integrated Power Cell | HV pin delivers constant ~1.05 mA current to charge VCC capacitor - eliminates external high-voltage start-up resistor |
| Built-in Digital Soft-Start | 12 ms, 4-step linear ramp of CS threshold (0.32 V → 1.0 V) - prevents transformer saturation and MOSFET overstress at turn-on |
| Multi-Mode Protection | Auto-restart for VCC UVP/OVP and open-loop; latch-off for output OVP and short-winding - ensures fail-safe system behavior |
Applications
| LCD TV Power Supply | Notebook Adapter |
|---|---|
Use Scenario: 24–48 W off-line flyback converter powering main logic board and backlight inverter. IC Role / Device Role / Timing Role: Quasi-resonant PWM controller managing ZC-synchronized MOSFET switching, digital load-adaptive frequency scaling, and burst-mode standby. Use Value: Enables >85% full-load efficiency and <100 mW no-load consumption compliant with Energy Star 6.0 and EU CoC Tier 2. | Use Scenario: Universal-input (90–264 Vac), 65 W flyback adapter for portable computing devices. IC Role / Device Role / Timing Role: Primary-side controller executing digital soft-start, foldback current limiting, and VCC-supervised protection sequencing. Use Value: Eliminates need for optocoupler feedback loop compensation and reduces BOM count by integrating HV startup and burst-mode logic. |
| CRT TV SMPS | Industrial Display PSU |
Use Scenario: 75–120 W flyback-based switched-mode power supply for legacy CRT television sets. IC Role / Device Role / Timing Role: QR controller coordinating demagnetization detection, adaptive frequency reduction, and multi-level overvoltage response. Use Value: Maintains stable output under wide line/load variations and suppresses audible transformer noise via controlled ZC switching. | Use Scenario: Ruggedized 36 W flyback supply for industrial HMI panels operating in extended temperature (-25°C to +70°C). IC Role / Device Role / Timing Role: Fault-tolerant controller implementing latch-off OVP, short-winding detection, and auto-restart UVP for field reliability. Use Value: Reduces field failure rate by detecting winding faults before catastrophic MOSFET failure and enabling safe recovery from brownout events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quasi-resonant flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS01G | Lower VCC UVLO (8.5 V), no digital frequency reduction - fixed-frequency QR with analog burst | Suitable for lower-cost, lower-efficiency adapters where <100 mW standby is not required | Select when cost sensitivity outweighs efficiency compliance needs and design simplicity is prioritized |
| UCC28600D | Texas Instruments part with analog frequency foldback and different ZC conditioning; requires external HV startup resistor | Used in UL-certified lighting drivers and medical adapters requiring tighter EMI control | Choose if existing TI ecosystem support, analog design familiarity, or specific safety certification paths are critical |
Compared with ICE2QS01G and UCC28600D, ICE2QS03HKLA1 uniquely combines digital frequency reduction, integrated HV startup, and latch-off OVP in a single DIP-8 package - delivering superior light-load efficiency and reduced component count for consumer display power supplies.
Availability
ICE2QS03HKLA1 is available at Aetrix Electronics and suitable for LCD TV power supplies, notebook adapters, CRT TV SMPS, and industrial display PSUs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ICE2QS03HKLA1 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 AG is a German semiconductor leader specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The ICE2QS series targets high-efficiency, low-standby off-line flyback converters - designed specifically for consumer display and adapter markets demanding regulatory compliance, thermal robustness, and integration density.
FAQ
What is the purpose of the dual HV pins (pins 4 and 5) on ICE2QS03HKLA1?
Pins 4 and 5 are both HV inputs connected internally to the same high-voltage startup cell. Their duplication reduces trace resistance and power dissipation during VCC pre-charge, improves thermal distribution, and enhances reliability under sustained high-line conditions (265 Vac). They are not separate functional inputs.
How does the digital frequency reduction improve efficiency compared to analog QR controllers?
Digital frequency reduction in ICE2QS03HKLA1 ignores 1–7 zero crossings based on real-time VFB level, extending QR operation down to ~5% load. Analog QR controllers typically revert to fixed-frequency operation below 20–30% load, increasing switching losses. This digital adaptation sustains valley-switching efficiency across the full load range.
Can ICE2QS03HKLA1 operate without an optocoupler in the feedback path?
No - ICE2QS03HKLA1 requires an optocoupler-connected feedback network (e.g., TL431 + optocoupler) on the FB pin for primary-side regulation. The FB pin processes the isolated error signal to control PWM duty and frequency; it does not support direct secondary-side sensing or auxiliary winding regulation alone.
What triggers the latch-off OVP versus auto-restart OVP in ICE2QS03HKLA1?
Latch-off OVP activates when ZC pin voltage exceeds the internal threshold (indicating output overvoltage), forcing immediate shutdown until power cycle. Auto-restart OVP applies only to VCC overvoltage (e.g., due to auxiliary winding fault) - the IC halts, discharges VCC, then restarts after VCC drops below UVLO threshold.
ICE2QS03HKLA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- -
- Topology:
- Flyback
- Voltage - Start Up:
- 18 V
- Voltage - Supply (Vcc/Vdd):
- 10.5V ~ 27V
- Duty Cycle:
- 50%
- Frequency - Switching:
- 52kHz
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage
- Control Features:
- -
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PG-DIP-8
- Mounting Type:
- Through Hole
ICE2QS03HKLA1 FAQ
1.How can I place an order for ICE2QS03HKLA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICE2QS03HKLA1 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 ICE2QS03HKLA1 reliable?
The price and inventory of ICE2QS03HKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE2QS03HKLA1 is usually 5 days.
3.What payment methods are accepted for ICE2QS03HKLA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE2QS03HKLA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICE2QS03HKLA1?
ICE2QS03HKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICE2QS03HKLA1 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 ICE2QS03HKLA1?
For technical support, including ICE2QS03HKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE2QS03HKLA1 requirements.
6.How does Aetrix verify that ICE2QS03HKLA1 is sourced from the original manufacturer or authorized distributors?
All ICE2QS03HKLA1 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 ICE2QS03HKLA1 meets industry standards.
7.What is the process for return or replacement of ICE2QS03HKLA1?
All ICE2QS03HKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE2QS03HKLA1, 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 ICE2QS03HKLA1 part is unused and in its original packaging.
Return procedure for ICE2QS03HKLA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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