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Infineon Technologies ICE2QS02GXUMA1
- Part No.:
- ICE2QS02GXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICE2QS02GXUMA1.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 8DSO
- Quantity:
- Payment:
- Shipping:
Inventory:5,851
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Product details
Overview
ICE2QS02GXUMA1 from Infineon Technologies is a second-generation quasi-resonant PWM controller IC for off-line flyback converters with auxiliary supply, featuring digital frequency reduction (down to 25 kHz at light load), 100 ns gate rise time, 25 ns fall time into 2.2 nF, and integrated cycle-by-cycle current limiting with adjustable leading-edge blanking. It targets LCD TV, audio amplifiers, and printer power supplies.
For engineers reviewing the ICE2QS02GXUMA1 datasheet, ICE2QS02GXUMA1 pinout, ICE2QS02GXUMA1 application, or ICE2QS02GXUMA1 equivalent, key selection criteria include zero-crossing detection accuracy (100 mV threshold), mains undervoltage protection hysteresis (adjustable via VINS), foldback point correction, latch-mode overvoltage/short-winding protection, and digital soft-start timing (16 ms, 4-step).
Technical Context
This IC implements peak-current-mode control with dual-path decision logic: switch-on is determined digitally using zero-crossing detection and an up/down counter synchronized to transformer demagnetization, while switch-off is analog-determined by CS and FB signals. The ZC pin serves triple duty-demagnetization sensing, output overvoltage fault detection (VZCOVP = 4.5 V), and mains voltage feedforward for current limit scaling.
Digital frequency reduction dynamically adjusts switching period based on feedback voltage (VFB) thresholds (VFBZL, VFBZH, VFBZR1), enabling quasi-resonant operation down to very low loads. Protection functions-including adjustable blanking time (BL pin), restart delay, foldback correction, and maximum on-time limitation-are fully configurable via external RC networks without firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology Support | Quasi-resonant flyback with auxiliary VCC supply - enables valley-switching for reduced EMI and conduction loss. |
| Switching Frequency Range | 25 kHz to 130 kHz (digital frequency reduction) - maintains QR operation across full load range, not just at peak load. |
| Gate Drive Rise/Fall Time | 100 ns / 25 ns into 2.2 nF - ensures fast MOSFET turn-on/off for minimal switching loss in high-frequency QR designs. |
| ZC Detection Threshold | 100 mV (VZCCT) - precise transformer demagnetization detection for reliable valley switching. |
| VINS Undervoltage Threshold | 1.25 V with adjustable hysteresis - enables robust brown-out protection tailored to mains input variation. |
| Soft-Start Duration | 16 ms, 4-step digital ramp (1.8 V → 4.0 V reference) - eliminates inrush stress on primary switch, diode, and transformer. |
| Overvoltage Fault Threshold (ZC) | 4.5 V (VZCOVP) - detects secondary-side overvoltage via reflected ZC signal, triggering latch-off. |
Pinout & Package
ICE2QS02GXUMA1 is housed in a PG-DSO-8-8 package (8-pin SOIC, exposed pad, RoHS-compliant lead plating), optimized for thermal dissipation and surface-mount assembly in compact AC/DC adapters and auxiliary supplies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BL | Adjustable blanking & restart timing | RC network sets overload blanking duration and auto-restart delay - prevents nuisance tripping during transient surges. |
| ZC | Zero-crossing detection & OVP sensing | Tri-function pin: detects transformer demagnetization (≤100 mV), flags output overvoltage (>4.5 V), and scales current limit with mains voltage. |
| FB | Feedback input & overload monitoring | Connects to optocoupler output; used for PWM off-determination and open-loop/overload protection (VFB < 0.8 V triggers latch). |
| CS | Primary current sense input | Direct connection to shunt resistor; enables cycle-by-cycle peak current limiting and short-winding detection during MOSFET on-time. |
| VINS | Mains voltage sensing | Provides input for undervoltage lockout with user-adjustable hysteresis - critical for stable operation under brown-out conditions. |
| GATE | High-speed MOSFET driver output | Capable of driving 2.2 nF load with 100 ns rise / 25 ns fall - minimizes switching losses in CoolMOS™-based QR designs. |
| VCC | Controller supply input | Requires external auxiliary supply (11–20 V); includes internal UVLO (11 V turn-on, 10 V turn-off) for safe startup and shutdown. |
| GND | Power and signal reference ground | Common return for all internal blocks; must be low-impedance and separated from power ground to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Digital frequency reduction | Adapts switching period in real time using VFB-driven up/down counter - sustains QR efficiency below 10% load without burst mode artifacts. |
| Foldback Point Correction | Digitally adjusted current limit slope compensates for transformer leakage and winding resistance - improves cross-regulation in multi-output flybacks. |
| Adjustable blanking time (BL) | External RC sets both OLP blanking window and restart delay - allows system-level tuning of surge immunity vs. fault response speed. |
| Latch-mode protections | Independent latch-off for output overvoltage (ZC > 4.5 V) and short-winding (CS overvoltage during on-time) - prevents thermal runaway in fault conditions. |
| Integrated digital soft-start | 16 ms, 4-step voltage ramp (1.8 V → 4.0 V) - eliminates startup current spikes and transformer saturation risk without external components. |
Applications
| LCD TV Auxiliary Supply | Printer Main Power Converter |
|---|---|
|
Use Scenario: Standby and main power generation for LCD TV systems requiring low no-load consumption and EMI compliance. IC Role / Device Role / Timing Role: Quasi-resonant PWM controller managing valley-switching timing, current limiting, and auxiliary supply sequencing. Use Value: Digital frequency reduction maintains >75% efficiency at 10 mW load; ZC-based demagnetization detection ensures consistent valley switching across line/load variations. |
Use Scenario: Primary offline flyback converter powering logic, motors, and heaters in multifunction printers. IC Role / Device Role / Timing Role: Core timing and protection controller coordinating gate drive, current sensing, and fault latching. Use Value: Adjustable BL pin enables robust handling of motor startup surges; latch-mode short-winding protection prevents transformer burnout during paper jam events. |
| Audio Amplifier SMPS | Industrial Display Power Module |
|
Use Scenario: Low-noise, high-efficiency power supply for Class D audio amplifiers where EMI affects signal integrity. IC Role / Device Role / Timing Role: QR controller optimizing switching node dV/dt through precise ZC-triggered turn-on and soft-start-controlled ramp-up. Use Value: 100 mV ZC threshold and 25 ns gate fall time minimize high-frequency ringing; digital frequency reduction avoids audible beat frequencies. |
Use Scenario: Reliable front-panel display power in industrial HMIs operating across wide ambient temperature and input voltage ranges. IC Role / Device Role / Timing Role: Mains-monitoring PWM controller providing VINS-based brown-out recovery and foldback-corrected current limiting. Use Value: Adjustable VINS hysteresis ensures clean restart after 150-ms dips; maximum on-time limitation prevents core saturation during cold-start at low line. |
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 |
|---|---|---|---|
| ICE2QS03GXUMA1 | Higher max frequency (150 kHz vs. 130 kHz); identical pinout and protection set; adds enhanced foldback linearity. | Better suited for higher-power (≥65 W) or higher-density designs requiring tighter regulation at light load. | Select when upgrading power rating or needing improved cross-regulation in 3+ output flybacks. |
| UCC28600DR | Analog frequency reduction (not digital); no ZC pin - uses auxiliary winding sensing; lacks BL-adjustable restart and VINS hysteresis. | Requires auxiliary winding design; less flexible for mains-varying environments; simpler BOM but lower fault-tuning granularity. | Choose for cost-sensitive, single-output designs where digital configurability is non-critical and auxiliary winding is already present. |
Compared with ICE2QS02GXUMA1, ICE2QS03GXUMA1 offers higher frequency headroom and refined foldback, while UCC28600DR trades digital flexibility for analog simplicity and auxiliary-winding dependency - making ICE2QS02GXUMA1 optimal for mid-power, mains-adaptive, and surge-resilient auxiliary supply designs.
Availability
ICE2QS02GXUMA1 is available at Aetrix Electronics and suitable for LCD TV auxiliary supplies, printer main power converters, and audio amplifier SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ICE2QS02GXUMA1 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 (CECC-approved).
ICE2QS02GXUMA1 belongs to Infineon's CoolSET™ family of integrated quasi-resonant controllers, designed specifically for high-efficiency, low-EMI offline flyback converters in consumer and industrial power supplies with auxiliary VCC architecture.
FAQ
What is the purpose of the BL pin on ICE2QS02GXUMA1?
The BL (Blanking Time) pin accepts an external RC network to configure two independent timing parameters: the blanking window for Over Load Protection (OLP) and the restart delay after OLP latch-off. This allows designers to tune surge immunity - e.g., tolerate brief inrush currents during motor startup - without compromising fault response speed under sustained overload.
How does the ZC pin support both demagnetization detection and overvoltage protection?
The ZC pin performs three distinct functions: (1) it monitors transformer demagnetization via a 100 mV threshold (VZCCT) to enable valley switching; (2) it detects secondary overvoltage when voltage exceeds 4.5 V (VZCOVP), triggering latch-off; and (3) it sources a current proportional to mains voltage during MOSFET on-time, feeding into foldback correction. These are implemented in separate internal circuits sharing one pin.
Can ICE2QS02GXUMA1 operate without an auxiliary supply?
No - ICE2QS02GXUMA1 requires an external auxiliary supply connected to the VCC pin (11–20 V). It lacks a high-voltage start-up circuit and is explicitly designed for systems where standby or auxiliary power is pre-established, such as LCD TVs with dedicated standby rails. Attempting direct HV start-up will prevent operation.
What distinguishes digital frequency reduction from conventional burst-mode operation?
Digital frequency reduction continuously adjusts switching period based on load (via VFB-driven up/down counter), maintaining true quasi-resonant valley switching across the entire load range - including light load - without entering discontinuous conduction or audible burst modes. Burst mode interrupts switching entirely, causing EMI spikes and audible noise; digital frequency reduction preserves smooth, low-noise QR operation down to 10 mW.
ICE2QS02GXUMA1 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
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- -
- Topology:
- Flyback
- Voltage - Start Up:
- 12 V
- Voltage - Supply (Vcc/Vdd):
- 11V ~ 25V
- Duty Cycle:
- -
- Frequency - Switching:
- 20kHz ~ 150kHz
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Open Loop, Over Load, Over Voltage
- Control Features:
- -
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PG-DSO-8
- Mounting Type:
- Surface Mount
ICE2QS02GXUMA1 FAQ
1.How can I place an order for ICE2QS02GXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICE2QS02GXUMA1 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 ICE2QS02GXUMA1 reliable?
The price and inventory of ICE2QS02GXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE2QS02GXUMA1 is usually 5 days.
3.What payment methods are accepted for ICE2QS02GXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE2QS02GXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICE2QS02GXUMA1?
ICE2QS02GXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICE2QS02GXUMA1 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 ICE2QS02GXUMA1?
For technical support, including ICE2QS02GXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE2QS02GXUMA1 requirements.
6.How does Aetrix verify that ICE2QS02GXUMA1 is sourced from the original manufacturer or authorized distributors?
All ICE2QS02GXUMA1 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 ICE2QS02GXUMA1 meets industry standards.
7.What is the process for return or replacement of ICE2QS02GXUMA1?
All ICE2QS02GXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE2QS02GXUMA1, 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 ICE2QS02GXUMA1 part is unused and in its original packaging.
Return procedure for ICE2QS02GXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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