Infineon Technologies ICE2A280

Overview

ICE2A280 from Infineon Technologies is an off-line SMPS current-mode controller with integrated 800V CoolMOS™, designed for primary-side regulation in universal-input (85–265 VAC) flyback converters. It delivers up to 54W at 75°C with 0.8Ω R_DS(on), operates at 100kHz (reducible to 21.5kHz in standby), and features precise ±5% peak current limiting for transformer/diode cost optimization in low-power AC/DC adapters.

For engineers reviewing the ICE2A280 datasheet, ICE2A280 pinout, ICE2A280 application, or ICE2A280 equivalent, key selection considerations include its integrated 800V avalanche-rugged CoolMOS™, auto-restart protection architecture, soft-start control via external capacitor, and thermal shutdown with hysteresis-critical for reliable, no-heatsink, low-standby-power designs meeting European Commission requirements.

Technical Context

The ICE2A280 implements an improved current-mode control architecture where duty cycle is determined by comparing the amplified current-sense signal (gain = 3.65) against feedback voltage (V_FB), with leading-edge blanking (200ns) and propagation-delay compensation. Its oscillator supports frequency reduction from 100kHz to 21.5kHz during light-load standby to suppress audible noise while maintaining output regulation.

Protection is managed by a dedicated unit enabling auto-restart on overload, open-loop, overvoltage, or thermal events (T_j > 140°C). The SoftS pin serves dual roles: initiating controlled soft-start at power-up and defining auto-restart timing after fault detection via external RC network.

Key Specifications

Pinout & Package

ICE2A280 is housed in a P-DIP-8-6 package (plastic dual-in-line, 8-pin, 6.35 mm pitch), optimized for through-hole mounting and high-voltage creepage in compact AC/DC power supplies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2A265 and ICE3B0565J, ICE2A280 provides superior high-line surge immunity (800V vs. 650V), tighter current-limit tolerance (±5% vs. ±7%), and higher power density in DIP-8-making it optimal for universal-input, space-constrained, low-standby-power applications demanding robust fault recovery.

Availability

ICE2A280 is available at Aetrix Electronics and suitable for USB wall adapters, smart home power supplies, industrial IoT gateways, and LED driver auxiliary supplies requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for ICE2A280 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 including CECC approval.

The CoolSET™-F2 product line was engineered specifically for cost-sensitive, high-reliability off-line SMPS applications requiring integrated high-voltage switching, ultra-low standby power, and comprehensive auto-restart protection-targeting consumer, industrial, and lighting power supplies.

FAQ

What is the maximum continuous output power achievable with ICE2A280 in a standard DIP-8 PCB layout?

At T_a = 75°C with 6 cm² copper area on FR-4 PCB, ICE2A280 delivers 54W under 230VAC ±15% input and 34W across universal 85–265VAC input. This rating assumes proper thermal design, correct snubber implementation, and adherence to the recommended minimum trace widths and spacing per Infineon's layout guidelines in the September 2001 datasheet.

How does the SoftS pin function during normal operation versus fault recovery?

During startup, SoftS charges externally to initiate a linear voltage ramp that gradually increases duty cycle, preventing inrush current. During fault detection (e.g., overload), the pin discharges and recharges via the same RC network to define auto-restart interval-typically 0.5–2 seconds depending on C_SoftS and R_SoftS values specified in Section 3.3 of the datasheet.

Can ICE2A280 be used in discontinuous conduction mode (DCM) flyback topologies?

Yes-ICE2A280 supports both DCM and CCM operation. Its current-mode architecture inherently adapts to variable peak current and duty cycle. In DCM, the device maintains regulation by adjusting on-time based on sensed primary current slope and FB voltage, with no external mode-setting required.

What is the purpose of pins 4 and 5 being tied to the same internal Drain node?

Pins 4 and 5 are paralleled internal drain connections to reduce effective package inductance and improve high-frequency switching behavior. This dual-pin configuration lowers EMI emissions and minimizes voltage overshoot during CoolMOS™ turn-off-critical for meeting EN55022 Class B conducted emission limits without excessive snubber losses.