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PMIC - AC DC Converters, Offline Switchers

Image Part Number Description / PDF Quantity Rfq
ICE2B0565

ICE2B0565

IR (Infineon Technologies)

SWITCHING REGULATOR

20000
ICE2QR0665XKLA1

ICE2QR0665XKLA1

IR (Infineon Technologies)

IC CTRLR SMPS QUASI-RESON 8DIP

1957
ICE2A0565GXUMA1

ICE2A0565GXUMA1

IR (Infineon Technologies)

SWITCHING REGULATOR

3736
ICE3RBR0665JGXUMA1

ICE3RBR0665JGXUMA1

IR (Infineon Technologies)

IC OFFLINE CTRLR SMPS OTP DSO-12

0
ICE5QSAGXUMA1

ICE5QSAGXUMA1

IR (Infineon Technologies)

IC OFFLN CTRLR QUASI-RESON DSO8

2155
ICE3BR4765JFKLA1

ICE3BR4765JFKLA1

IR (Infineon Technologies)

IC OFFLINE CTRLR SMPS OTP 8DIP

1970
ICE5QR2280AZXKLA1

ICE5QR2280AZXKLA1

IR (Infineon Technologies)

IC CTLR QUASI-RES 7DIP

0
ICE5AR4770BZSXKLA1

ICE5AR4770BZSXKLA1

IR (Infineon Technologies)

100KHZ OFFLINE 700V 4.7 DIP-7

2000
ICE5AR0680AGXUMA1

ICE5AR0680AGXUMA1

IR (Infineon Technologies)

100KHZ OFFLINE 800V 0.6 DSO12

1571
ICE3A2065ZXKLA1

ICE3A2065ZXKLA1

IR (Infineon Technologies)

IC OFFLINE CTRLR SMPS CM 7DIP

0
ICE5AR0680BZSXKLA1

ICE5AR0680BZSXKLA1

IR (Infineon Technologies)

IC OFFLINE 800V FLYBACK 7DIP

1950
ICE1HS01G

ICE1HS01G

IR (Infineon Technologies)

BUFFER/INVERTER PERIPHL DRIVER

11500
ICE5QR2270AZXKLA1

ICE5QR2270AZXKLA1

IR (Infineon Technologies)

IC CTRLR SPS QUASI-RESON 7DIP

0
ICE3AR1080VJZXKLA1

ICE3AR1080VJZXKLA1

IR (Infineon Technologies)

IC OFFLINE CTRLR SMPS CM 7DIP

0
ICE5QR4780AZXKLA1

ICE5QR4780AZXKLA1

IR (Infineon Technologies)

IC CTLR QUASI-RES 7DIP

1421
ICE5AR4780BZSXKLA1

ICE5AR4780BZSXKLA1

IR (Infineon Technologies)

100KHZ OFFLINE 800V 4.7 DIP-7

120
ICE2QR0665

ICE2QR0665

IR (Infineon Technologies)

ICE2QR0665 - QUASI RESONANT COOL

1098
ICE3A2065I

ICE3A2065I

IR (Infineon Technologies)

100KHZ SWITCHING FREQ-MAX

2000
ICE5QR1070AZXKLA1

ICE5QR1070AZXKLA1

IR (Infineon Technologies)

.DP LITE COOLSET

0
ICE3BR1065JFXKSA2

ICE3BR1065JFXKSA2

IR (Infineon Technologies)

SMPS CURRENT MODE CONTROLLER

0

PMIC - AC DC Converters, Offline Switchers

1. Overview

AC-DC converters and offline switchers are critical subcategories of Power Management Integrated Circuits (PMICs) that convert alternating current (AC) from mains power to direct current (DC) for electronic devices. Offline switchers directly regulate input voltage without requiring a line-frequency transformer, enabling compact and efficient designs. These components are essential in modern electronics for ensuring stable power delivery, energy efficiency, and compliance with global standards like Energy Star and CoC Tier-2.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Flyback ControllersIsolated topology with energy storage in transformer; suitable for low-to-medium powerMobile chargers, adapter supplies
Forward ControllersHigher efficiency for medium-to-high power; requires reset circuitryIndustrial power supplies, telecom rectifiers
Resonant ControllersZVS/ZCS techniques for minimal switching losses; high-frequency operationHigh-end server PSUs, wireless charging
PFC-PrecursorsBoosts power factor to meet regulatory limits; often paired with main convertersAppliances, LED drivers

3. Structure and Components

Typical physical structure includes:

  • Package Types: DIP, SOP, QFN, or custom power packages
  • Internal Components:
    • Power MOSFET/BJT switches
    • PWM/PFM controllers
    • Voltage/current feedback circuits
    • Protection modules (OVP, OCP, OTP)
    • High-voltage startup circuits

Technical composition integrates primary-side regulation (PSR) or secondary-side feedback with optocouplers, often supporting synchronous rectification for efficiency optimization.

4. Key Technical Parameters

ParameterDescriptionImportance
Input Voltage Range85-265V AC or 120-400V DCGlobal compatibility and surge tolerance
Output Power1W-500W depending on topologyDetermines application scope
Switching Frequency20kHz-2MHzAffects EMI, transformer size, and efficiency
Efficiency85%-96% (varies with load)Thermal performance and energy costs
Protection FeaturesOvervoltage, overcurrent, thermal shutdownSystem reliability and safety compliance

5. Application Fields

  • Consumer Electronics: Phone chargers, notebook adapters, smart home devices
  • Industrial: Automation equipment, PLCs, test instruments
  • Medical: Isolated power supplies for diagnostic equipment
  • Telecom: 48V rectifiers, base station power systems
  • Automotive: On-board chargers, vehicle AC-DC systems

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
Texas InstrumentsUCC28780High-frequency resonant controller with GaN support
STMicroelectronicsL6565Current-mode flyback controller for adapters
InfineonICE3BR1765Integrated CoolSET for SMPS
ON SemiconductorNCP1342Quasi-resonant flyback controller
Monolithic Power SystemsMP44010Primary-side regulated controller

7. Selection Guidelines

  • Define input/output requirements (voltage, current, power)
  • Choose topology based on isolation needs and efficiency targets
  • Evaluate protection features for mission-critical applications
  • Consider package thermal performance (e.g., exposed pads)
  • Verify compliance with standards (UL, CE, FCC)
  • Balance cost vs. integration level (e.g., controller vs. digital PMIC)

Case Study: For a 65W USB-C laptop adapter, select a high-frequency resonant controller with synchronous rectification to achieve >92% efficiency and compact form factor.

8. Industry Trends

  • Integration: Combining PFC + LLC stages into single chips
  • Wide Bandgap: SiC/GaN FETs enabling >1MHz switching
  • Digital Control: Programmable PMICs with real-time optimization
  • Green Standards: Meeting EU CoC Tier-2 no-load <10mW requirements
  • AEC-Q Compliance: Growth in automotive-grade offline converters
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