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Infineon Technologies ICE1QS01G
- Part No.:
- ICE1QS01G
- Manufacturer:
- Infineon Technologies
- Category:
- PFC (Power Factor Correction)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICE1QS01G.pdf
- Description:
- IC PFC CTRLR 8DSO
- Quantity:
- Payment:
- Shipping:
Inventory:4,854
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Product details
Overview
ICE1QS01G from Infineon Technologies is a quasiresonant flyback controller IC optimized for AC/DC SMPS with integrated PFC charge-pump support, 20 kHz minimum standby frequency, <1 W standby input power, and primary current simulation. It drives external MOSFETs in TV, DVD, and satellite receiver power supplies up to 300 W.
For engineers reviewing the ICE1QS01G datasheet, ICE1QS01G pinout, ICE1QS01G application, or ICE1QS01G equivalent, key selection criteria include quasiresonant zero-voltage switching timing, mains-dependent foldback correction, digital load-dependent frequency stepping, and burst-mode operation without external control signal.
Technical Context
The ICE1QS01G implements digital frequency reduction via an UP/DOWN counter synchronized to zero-crossing detection at RZI, enabling precise 20 kHz–130 kHz stepping without jitter. Its primary current simulation (PCS) eliminates leading-edge spikes by reconstructing Iprimary using R2/C2 network and clamping to 1.5 V during switch-off.
Regulation combines primary-side sensing (RZI comparator threshold at 50 mV) and secondary-side optocoupler feedback compatibility. Mains undervoltage lockout, VCC over/undervoltage protection, and ringing suppression timed from output voltage provide robust fault handling in consumer-grade offline converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standby Input Power | <1 W - enables Energy Star-compliant low-power standby in consumer electronics |
| Minimum Switching Frequency | 20 kHz - sets lowest operating point in burst mode to avoid audible noise |
| Start-up Current | 60 µA - reduces auxiliary winding losses and enables high-impedance start-up networks |
| RZI Threshold Voltage | 50 mV - defines zero-current detection point for quasiresonant turn-on timing |
| PCS Clamping Voltage | 1.5 V - stabilizes primary current simulation during MOSFET off-time |
| VCC UVLO Threshold | 12.5 V (typ.) - ensures reliable operation only after sufficient bulk capacitor charging |
| Burst Mode Trigger | Automatic or signal-controlled - supports adapter applications without standby pin |
Pinout & Package
P-DSO-8 surface-mount package with exposed thermal pad (JEDEC MS-012AC variant), 8-pin SOIC footprint, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 N.C. | No-connect terminal | Internally unconnected; must remain floating or grounded per layout guidelines |
| 2 PCS | Primary current simulation input | Receives RC-reconstructed Iprimary signal; clamped to 1.5 V for spike-free sensing |
| 3 RZI | Zero-crossing and regulation input | Detects transformer demagnetization; 50 mV threshold triggers MOSFET turn-on |
| 4 SRC | Soft-start and regulation capacitor node | Controls soft-start ramp and UP/DOWN counter step rate via external capacitor |
| 5 OFC | Overvoltage fault comparator input | Monitors output overvoltage via optocoupler; latches OFF on fault |
| 6 GND | Analog ground reference | Common return for internal error amplifier, comparators, and driver logic |
| 7 OUT | High-current MOSFET gate driver output | Capable of 500 mA sink/source; directly drives power MOSFET gate |
| 8 VCC | Supply voltage input | Accepts 10–22 V; includes 12.5 V UVLO and 20 V OVP protection |
Key Features
| Feature | Design Value |
|---|---|
| Digital frequency stepping | 20–130 kHz in discrete steps - eliminates jitter under pulsed loads while maintaining EMI compliance |
| Primary current simulation | 1.5 V clamped PCS input - removes need for current-sense resistor and associated power loss |
| Mains-dependent foldback correction | Adjusts current limit threshold based on rectified AC line voltage - maintains consistent power delivery across 85–265 VAC |
| Ringing suppression timing | Controlled by output voltage level - prevents false zero-crossing detection during transformer ringing |
| Free-use fault comparator | OFC pin configurable as general-purpose comparator - enables custom overtemperature or overcurrent protection |
Applications
| TV Power Supply | DVD Player SMPS |
|---|---|
Use Scenario: 150 W offline flyback converter with integrated PFC charge pump for flat-panel TV main power. IC Role / Device Role / Timing Role: Quasiresonant controller managing ZVS turn-on, digital frequency scaling, and burst-mode transition at light load. Use Value: Achieves <1 W standby consumption and meets IEC 61000-3-2 Class D harmonic limits without auxiliary PFC controller. | Use Scenario: 45 W dual-output (12 V/5 V) flyback supply for portable DVD player with battery backup interface. IC Role / Device Role / Timing Role: Primary-side regulated controller using RZI zero-crossing detection and PCS-based current limiting. Use Value: Eliminates optocoupler in constant-voltage output path, reducing BOM cost and improving long-term stability. |
| Satellite Receiver PSU | Set-Top Box Adapter |
Use Scenario: 65 W quasi-resonant flyback powering LNB bias and digital board in satellite receiver. IC Role / Device Role / Timing Role: Standby-burst controller with automatic entry/exit and mains-voltage-compensated foldback. Use Value: Maintains 0.8 W no-load input power across universal AC input while supporting fast wake-up response. | Use Scenario: Wall-mounted 24 W AC/DC adapter for IPTV set-top box with no standby control signal. IC Role / Device Role / Timing Role: Self-triggered burst-mode controller using internal load-sensing and SRC-based timing. Use Value: Enables true "zero-pin" standby implementation-no external enable line required for sub-1 W operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quasiresonant flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | Integrated 650 V avalanche-rated MOSFET; higher VCC UVLO (14.5 V); no PCS pin | Eliminates external MOSFET but lacks primary current simulation for spike-free sensing | Select when board space is constrained and primary-side sensing is not required |
| UCC28600D | Programmable burst-mode threshold; analog frequency scaling; no digital stepping or mains foldback correction | Requires external circuitry for line-voltage compensation and has higher standby current (120 µA) | Select when design flexibility in burst entry point outweighs fixed-frequency jitter requirements |
Compared with ICE2QS03G, ICE1QS01G offers superior primary current simulation and lower start-up current but requires external MOSFET; versus UCC28600D, it delivers deterministic digital frequency stepping and built-in mains foldback-critical for universal-input consumer SMPS with strict EMI and efficiency targets.
Availability
ICE1QS01G is available at Aetrix Electronics and suitable for TV power supplies, DVD player SMPS, satellite receiver PSUs, and set-top box adapters requiring stable component supply and long-lifecycle support.
Supply support for ICE1QS01G 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 manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q100 standards.
The ICE1QS01G belongs to Infineon's ICE1x family of quasiresonant controllers, designed specifically for cost-sensitive, high-efficiency offline SMPS in consumer electronics where standby power, EMI, and reliability are critical.
FAQ
What is the purpose of the PCS pin on the ICE1QS01G?
The PCS (Primary Current Simulation) pin accepts a voltage derived from an RC network across the primary winding, clamped to 1.5 V during MOSFET off-time. This reconstructs primary current without a sense resistor, eliminating leading-edge spikes and enabling accurate cycle-by-cycle current limiting in quasiresonant operation.
How does the ICE1QS01G achieve <1 W standby power?
It combines ultra-low 60 µA start-up current, automatic burst-mode entry at light load, digital frequency stepping down to 20 kHz, and complete shutdown of internal references and drivers during burst intervals-reducing total IC consumption to under 300 µW in deep standby.
Can the ICE1QS01G operate without an optocoupler?
Yes-it supports primary-side regulation using the RZI pin for zero-crossing detection and internal error amplifier feedback. Optocoupler use is optional for tighter secondary-side voltage regulation or safety-isolated designs; OFC pin remains available for overvoltage monitoring regardless.
What protection features are integrated into the ICE1QS01G?
It integrates VCC overvoltage (20 V) and undervoltage (12.5 V) lockout, mains undervoltage detection, output overvoltage latch via OFC, current limiting via PCS, and ringing suppression timed from output voltage. All protections trigger immediate gate shutdown without external components.
ICE1QS01G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Mode:
- -
- Frequency - Switching:
- -
- Current - Startup:
- 60 µA
- Voltage - Supply:
- 9V ~ 20V
- Operating Temperature:
- -25°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-8-3
ICE1QS01G FAQ
1.How can I place an order for ICE1QS01G through Aetrix?
Please submit a Request for Quotation (RFQ) for ICE1QS01G 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 ICE1QS01G reliable?
The price and inventory of ICE1QS01G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE1QS01G is usually 5 days.
3.What payment methods are accepted for ICE1QS01G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE1QS01G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICE1QS01G?
ICE1QS01G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICE1QS01G 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 ICE1QS01G?
For technical support, including ICE1QS01G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE1QS01G requirements.
6.How does Aetrix verify that ICE1QS01G is sourced from the original manufacturer or authorized distributors?
All ICE1QS01G 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 ICE1QS01G meets industry standards.
7.What is the process for return or replacement of ICE1QS01G?
All ICE1QS01G units undergo pre-shipment inspection (PSI). If there is an issue with ICE1QS01G, 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 ICE1QS01G part is unused and in its original packaging.
Return procedure for ICE1QS01G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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