Infineon Technologies ICE3B0365

Overview

ICE3B0365 from Infineon Technologies is an off-line AC/DC current-mode PWM controller with integrated 650V depletion-mode CoolMOS™ power transistor and startup cell, housed in PG-DIP-8 package. It delivers up to 22W input power at 230VAC ±15%, operates at fixed 67kHz switching frequency, features <±5% peak current limit tolerance, and enables <100mW standby power via Active Burst Mode - used in compact open-frame SMPS for consumer adapters and auxiliary supplies.

For engineers reviewing the ICE3B0365 datasheet, ICE3B0365 pinout, ICE3B0365 application, or ICE3B0365 equivalent, this device requires attention to its integrated high-voltage drain configuration, soft-start timing control, feedback loop stability under burst mode, and thermal derating in DIP-8 without heatsink - all critical for low-cost, no-load efficiency compliance in Class VI energy standards.

Technical Context

The ICE3B0365 integrates a 650V avalanche-rugged CoolMOS™ transistor with internal switchable startup cell, eliminating external high-voltage resistors. Its current-mode control uses leading-edge blanking and propagation delay compensation to ensure precise peak current sensing across load transients.

It implements Auto Restart Mode for overtemperature, VCC overvoltage, output open-loop, overload, and VCC undervoltage faults, while Active Burst Mode maintains regulation at light loads with immediate response to load jumps - avoiding output voltage blackout during dynamic transitions.

Key Specifications

Pinout & Package

ICE3B0365 is packaged in PG-DIP-8 with isolated drain terminals (pins 4 and 5 internally shorted), enabling direct PCB creepage compliance for reinforced insulation. Pin 6 is not connected; pins 4/5 serve as high-voltage drain path for the integrated CoolMOS™.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar off-line SMPS controller applications.

Compared with ICE3B0565, ICE3B0365 trades 3W input power headroom and 1.75Ω higher R_DS(on) for lower gate charge and reduced EMI at 67kHz; versus ICE3A0365, it sacrifices high-frequency size advantage for improved thermal performance and lower switching loss in thermally constrained DIP-8 layouts.

Availability

ICE3B0365 is available at Aetrix Electronics and suitable for USB wall adapters, smart home hub PSUs, LED driver auxiliary supplies, and industrial sensor node power supplies requiring stable component supply and long-term lifecycle support.

Supply support for ICE3B0365 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 CoolSET™-F3 product line targets cost-sensitive, high-efficiency offline SMPS designs - integrating controller and CoolMOS™ to reduce BOM count and simplify compliance with international energy efficiency standards.

FAQ

What is the purpose of the internally shorted Drain pins (4 and 5) in the PG-DIP-8 package?

Pins 4 and 5 are internally connected to the drain of the integrated 650V CoolMOS™ transistor. This dual-pin layout increases current handling capacity and improves thermal dissipation through parallel PCB copper paths, while maintaining required creepage distance for reinforced insulation in universal-input applications.

How does the Active Burst Mode differ from traditional skip-cycle mode in ICE3B0365?

Unlike conventional skip-cycle, ICE3B0365's Active Burst Mode keeps the controller fully active during low-load periods - continuously monitoring feedback and adjusting burst frequency in real time. This eliminates output voltage dropout during sudden load steps and reduces output ripple to <1%, enabling tighter regulation without auxiliary winding.

Can ICE3B0365 operate without an auxiliary winding for VCC supply?

Yes - its integrated 650V startup cell powers VCC directly from the rectified AC line until the auxiliary winding begins supplying power after startup. This allows single-winding transformer designs, reducing cost and board space, though auxiliary winding is recommended for sustained full-load operation to avoid VCC UVLO.

What protection mechanisms trigger Auto Restart Mode in ICE3B0365?

Auto Restart Mode activates on five independent fault conditions: overtemperature (via internal thermal sensor), VCC overvoltage (>25 V), VCC undervoltage (<9.5 V), output open-loop (loss of feedback signal), and overload (excessive current sense duration). Recovery occurs automatically after fault removal and VCC reset.