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Infineon Technologies ICE3BS03LJGXUMA1
- Part No.:
- ICE3BS03LJGXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICE3BS03LJGXUMA1.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 8DSO
- Quantity:
- Payment:
- Shipping:
Inventory:16,779
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Product details
Overview
ICE3BS03LJGXUMA1 from Infineon Technologies is an off-line current-mode PWM controller IC for AC/DC SMPS, integrating a 500V high-voltage startup cell, active burst mode (<100mW no-load standby), 65kHz fixed-frequency operation, and latched-off/auto-restart protection. It targets low-to-medium-power adapters (e.g., DVD/Blu-ray players, set-top boxes, notebook adapters) with BiCMOS process enabling 10.5–26V VCC range and frequency jitter for EMI reduction.
For engineers reviewing the ICE3BS03LJGXUMA1 datasheet, ICE3BS03LJGXUMA1 pinout, ICE3BS03LJGXUMA1 application, or ICE3BS03LJGXUMA1 equivalent, key selection criteria include integrated HV startup capability, ±5% peak current limit tolerance, external latch-off enable via BL pin, and built-in soft start (20ms) for MOSFET stress reduction during power-up.
Technical Context
The ICE3BS03LJGXUMA1 implements current-mode control with propagation delay compensation to maintain accurate output power limiting across wide input voltage ranges (85–270VAC). Its PWM section includes an internal oscillator (65kHz), leading-edge blanking (220ns), and modulated gate drive for low EMI.
Protection architecture features dual-tier response: latched-off mode for critical faults (overtemperature >130°C, VCC overvoltage, winding short), and auto-restart mode for non-critical conditions (overload, open-loop, VCC undervoltage <6.23V). The BL pin supports both extendable blanking (via external capacitor) and external latch-off activation (<0.25V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 65kHz fixed - enables predictable EMI filtering and transformer design without external timing components. |
| Startup Voltage Range | Integrated 500V HV pin - eliminates external startup resistor, reduces component count and losses in bulk-cap-connected applications. |
| Current Limit Tolerance | ±5% overall - ensures consistent overcurrent protection across temperature and process variation, critical for reliable short-circuit handling. |
| VCC Operating Range | 10.5V to 26V - supports wide auxiliary supply designs and improves system robustness under brownout or transient conditions. |
| Standby Power | <100mW at no load, 270VAC - meets stringent energy efficiency standards (e.g., EU CoC Tier 2, DOE Level VI) without auxiliary winding. |
| Max Duty Cycle | 75% - provides sufficient on-time margin for flyback converters operating at high input voltages or low output voltages. |
| Soft Start Time | 20ms typical - limits inrush current and prevents MOSFET overstress during initial power-up sequence. |
Pinout & Package
ICE3BS03LJGXUMA1 is housed in a PG-DSO-8 (Plastic Dual Small Outline) package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation in compact AC/DC adapters.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BL | Extended blanking & latch-off enable | Configures blanking window extension (via external capacitor) and triggers immediate latched shutdown when pulled below 0.25V. |
| 2 - FB | Feedback input | Primary control signal for regulation and burst-mode duty cycling; accepts optocoupler output directly without external RC filter. |
| 3 - CS | Current sense input | Monitors MOSFET source current via sense resistor; initiates immediate gate turn-off upon reaching internal current limit threshold. |
| 4 - Gate | Gate driver output | Drives external N-channel MOSFET gate with modulated slew rate to reduce EMI emissions. |
| 5 - HV | High-voltage startup input | Connects directly to rectified bulk capacitor; powers internal startup cell until VCC reaches 18V, then disables automatically. |
| 6 - n.c. | No connection | Internally unconnected pin; must remain floating per datasheet - no external tie or routing. |
| 7 - VCC | Controller supply | Power rail for internal circuitry; regulated by external auxiliary winding or bias supply; UVLO threshold at 10.5V (turn-on) and 6.23V (latch-off reset). |
| 8 - GND | Signal ground reference | Common return path for all analog and digital functions; requires low-impedance PCB layout to ensure stable current sensing and feedback accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Active Burst Mode | Enables sub-100mW standby power while retaining full secondary-side regulation via same optocoupler used in normal PWM mode. |
| Frequency Jitter | Spreads switching spectrum to lower peak EMI amplitude, easing compliance with CISPR-22/32 Class B conducted and radiated limits. |
| Built-in Soft Start | 20ms ramp-up of internal reference avoids output overshoot and MOSFET gate stress during cold start or line recovery. |
| Propagation Delay Compensation | Adjusts current-sense timing dynamically to maintain precise output power limit across 85–270VAC input range. |
| BiCMOS Process | Reduces quiescent current and extends VCC operating range to 26V, improving compatibility with diverse auxiliary supply topologies. |
Applications
| DVD/Blu-ray Player Power Supply | Set-Top Box AC/DC Adapter |
|---|---|
Use Scenario: Primary-side regulated flyback converter powering optical drive motors, servo circuits, and digital logic in consumer disc players. IC Role / Device Role / Timing Role: Current-mode PWM controller providing precise cycle-by-cycle current limiting, burst-mode standby control, and integrated HV startup. Use Value: Eliminates external startup resistor and feedback RC filter, reducing BOM count by ≥3 components while achieving <100mW no-load consumption. | Use Scenario: Compact, cost-sensitive offline SMPS delivering 12V/1A and 3.3V/2A to demodulator, decoder, and memory subsystems. IC Role / Device Role / Timing Role: Fixed-frequency (65kHz) PWM controller with auto-restart protection for overload and open-loop faults during channel switching transients. Use Value: Built-in 20ms blanking window prevents false overcurrent triggering during high-load jumps (e.g., video decode bursts), improving system uptime. |
| Notebook AC Adapter | USB-C PD-Compatible Charger |
Use Scenario: Universal-input (90–264VAC) flyback supplying 19V/3.42A to laptop mainboard with tight ripple and dynamic load regulation. IC Role / Device Role / Timing Role: Primary-side controller implementing active burst mode and soft-start for low-noise, low-EMI operation during light-load and transient conditions. Use Value: Frequency jitter + modulated gate drive lowers peak radiated emissions by >6dB, simplifying EMC pre-compliance testing. | Use Scenario: Multi-output quasi-resonant flyback supporting USB-C PD negotiation via secondary-side microcontroller and optocoupler feedback. IC Role / Device Role / Timing Role: Robust primary-side PWM controller with external latch-off enable (BL pin) for coordinated shutdown during PD fault events (e.g., overvoltage, overtemperature). Use Value: BL pin allows host MCU to force immediate latched shutdown independent of internal protection thresholds, enhancing system-level safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar off-line current-mode PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE3BS03LJG | Same die, identical PG-DSO-8 marking and functionality; XUMA1 suffix denotes tape-and-reel packaging per Infineon standard. | No functional difference - interchangeable in all designs using ICE3BS03LJG. | Select ICE3BS03LJGXUMA1 for automated SMT production requiring reel packaging and traceable lot control. |
| ICE3BS03LJ | Identical electrical specs and pinout but supplied in tube packaging; lacks XUMA1 tape-and-reel designation. | Suitable for prototyping, low-volume builds, or manual assembly where reel packaging is unnecessary. | Choose ICE3BS03LJ for engineering validation or small-batch qualification where packaging format is not constrained. |
Compared with ICE3BS03LJG and ICE3BS03LJ, the ICE3BS03LJGXUMA1 offers identical performance and reliability but adds standardized tape-and-reel delivery for high-volume SMT lines, enabling seamless feeder integration and full traceability without design or layout changes.
Availability
ICE3BS03LJGXUMA1 is available at Aetrix Electronics and suitable for DVD/Blu-ray player power supplies, set-top box AC/DC adapters, and notebook AC adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for ICE3BS03LJGXUMA1 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 R&D and manufacturing infrastructure.
The F3 series - including ICE3BS03LJGXUMA1 - was designed specifically for cost-sensitive, low-to-medium-power offline SMPS targeting consumer electronics with strict standby power and EMI requirements.
FAQ
What is the purpose of the BL pin on ICE3BS03LJGXUMA1?
The BL pin serves two distinct functions: (1) extending the internal 20ms blanking window via an external capacitor to suppress false overcurrent trips during high-load transients, and (2) enabling external latched shutdown by pulling the pin below 0.25V. Both functions operate independently and are validated in the datasheet's Functional Description and Pin Functionality sections.
Does ICE3BS03LJGXUMA1 require an external startup resistor?
No. ICE3BS03LJGXUMA1 integrates a 500V high-voltage startup cell connected to the HV pin, allowing direct connection to the bulk capacitor. The startup cell automatically disables once VCC reaches 18V, eliminating the need for an external high-voltage resistor and reducing power loss and component count.
How does the active burst mode achieve <100mW standby power?
Active burst mode reduces switching activity during light/no-load conditions while maintaining closed-loop regulation via the FB pin. The IC enters low-power sleep cycles between bursts, and the internal bias circuitry minimizes quiescent current. Combined with BiCMOS process and integrated startup, this achieves <100mW at 270VAC - verified in Section 3.7.2 of the datasheet.
Can ICE3BS03LJGXUMA1 be used in quasi-resonant (QR) flyback topologies?
No - ICE3BS03LJGXUMA1 is a fixed-frequency (65kHz) current-mode PWM controller without valley-switching detection or variable-frequency QR control logic. It is intended for continuous conduction mode (CCM) or discontinuous conduction mode (DCM) flyback designs. For QR operation, Infineon's ICE5QSBGx or BD7682FJ series are appropriate alternatives.
ICE3BS03LJGXUMA1 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:
- 18 V
- Voltage - Supply (Vcc/Vdd):
- 10.5V ~ 26V
- Duty Cycle:
- 75%
- Frequency - Switching:
- 65kHz
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage
- Control Features:
- -
- Operating Temperature:
- -25°C ~ 130°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PG-DSO-8
- Mounting Type:
- Surface Mount
ICE3BS03LJGXUMA1 FAQ
1.How can I place an order for ICE3BS03LJGXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICE3BS03LJGXUMA1 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 ICE3BS03LJGXUMA1 reliable?
The price and inventory of ICE3BS03LJGXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE3BS03LJGXUMA1 is usually 5 days.
3.What payment methods are accepted for ICE3BS03LJGXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE3BS03LJGXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICE3BS03LJGXUMA1?
ICE3BS03LJGXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICE3BS03LJGXUMA1 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 ICE3BS03LJGXUMA1?
For technical support, including ICE3BS03LJGXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE3BS03LJGXUMA1 requirements.
6.How does Aetrix verify that ICE3BS03LJGXUMA1 is sourced from the original manufacturer or authorized distributors?
All ICE3BS03LJGXUMA1 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 ICE3BS03LJGXUMA1 meets industry standards.
7.What is the process for return or replacement of ICE3BS03LJGXUMA1?
All ICE3BS03LJGXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE3BS03LJGXUMA1, 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 ICE3BS03LJGXUMA1 part is unused and in its original packaging.
Return procedure for ICE3BS03LJGXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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