Diodes Incorporated AP1662M-G1

Overview

AP1662M-G1 from Diodes Incorporated is a high-performance active power factor correction (PFC) controller IC designed for DCM boundary conduction mode operation in electronic ballasts, AC-DC adapters, and off-line SMPS. It integrates a one-quadrant multiplier, zero-current detector, totem-pole gate driver (600mA source / 800mA sink), 2.5V ±1% internal reference, and full protection suite including OVP, UVLO with 2.5V hysteresis, and multiplier output clamping. It meets IEC61000-3-2 with THD <10% at high line/full load.

For engineers reviewing the AP1662M-G1 datasheet, AP1662M-G1 pinout, AP1662M-G1 application, or AP1662M-G1 equivalent, this page delivers verified technical context, SO-8 package details, functional block-level timing behavior, real-world PFC design constraints, and validated alternative options for legacy system maintenance and redesign.

Technical Context

The AP1662M-G1 implements a current-mode DCM boundary conduction control architecture where the external MOSFET is turned on at zero-inductor-current (via ZCD pin threshold of 1.6V falling edge) and turned off when sensed current exceeds a dynamically scaled reference (from multiplier output, max 1.8V). Its proprietary one-quadrant multiplier accepts VMULT (0–3.5V) and VCOMP (2–5.8V) inputs to generate a sinusoidal current reference aligned with input AC phase.

Internal regulation includes a 2.5V reference with ±0.5% drift over –40°C to +125°C, error amplifier with 80dB open-loop gain and 1MHz GBW, and dual OVP detection: fast dynamic OVP triggered by >40μA current into COMP pin, plus static OVP at VCOMP <2.25V. The start-up timer (75–300μs) enables stand-alone operation without external circuitry.

Key Specifications

Pinout & Package

AP1662M-G1 is housed in an SO-8 surface-mount package (6.20 × 5.10 × 1.75 mm), RoHS-compliant and halogen-free per Diodes Inc. Green standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar active PFC controller applications.

Compared with AL6562A and ICE2PCS01, AP1662M-G1 provides superior THD performance, integrated DCM timing via ZCD, and lower system-level BOM count due to internal start-up timer and disable function - making it optimal for space-constrained, high-efficiency PFC designs where regulatory compliance and light-load efficiency are critical.

Availability

AP1662M-G1 is available at Aetrix Electronics and suitable for electronic ballasts, AC-DC adapters, and off-line SMPS requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP1662M-G1 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP1662 belongs to Diodes' high-performance PFC controller product line, engineered specifically for DCM boundary-mode operation in universal-input AC-DC conversion systems demanding low THD, high PF, and minimal external components.

FAQ

What is the purpose of the ZCD pin on the AP1662M-G1?

The ZCD (Zero Current Detection) pin monitors auxiliary winding voltage to detect inductor current zero-crossing. When voltage falls below 1.6V, the IC triggers MOSFET turn-on for DCM boundary operation. Pulling ZCD ≤150mV disables the IC, reducing quiescent current to 20–90μA for standby mode - a key feature for energy-efficient designs meeting EU CoC Tier 2 standards.

How does the AP1662M-G1 achieve compliance with IEC61000-3-2?

The AP1662M-G1 meets IEC61000-3-2 Class C through DCM boundary conduction control, a one-quadrant multiplier that shapes input current to match AC voltage phase, and precise 2.5V reference regulation. Measured THD remains below 10% at 265VAC full load without external harmonic filters, validated per Diodes' DS40914 Rev.1 test data on page 1.

Can the AP1662M-G1 drive a 650V MOSFET directly?

Yes - the totem-pole GD output supports 600mA source and 800mA sink capability, sufficient to drive common 650V superjunction MOSFETs (e.g., 11N65C3) with gate charge ≤35nC. Output clamp voltage is 9–13V at VCC=20V, ensuring safe gate overvoltage protection without external zener clamping in most designs.

What is the significance of the 40μA dynamic OVP threshold on the COMP pin?

The 40μA dynamic OVP threshold enables rapid response to output overvoltage events: excess current from the feedback capacitor flows into COMP, triggering immediate shutdown before output overshoot exceeds safe limits. This complements the slower static OVP (VCOMP <2.25V), providing dual-layer protection essential for reliability in unregulated AC-DC systems with variable loads.