Diodes Incorporated AL1772T16E-13

Overview

AL1772T16E-13 from Diodes Incorporated is a dual-channel dimmable linear LED driver integrated with an offline quasi-resonant PFC controller in a single TSSOP-16EP (Type DX) package. It delivers 250mA per channel with ±4% LED current accuracy, supports 4kHz–40kHz PWM dimming down to 0.4% duty cycle, and operates across 6.5V–30V DVCC input for tunable-white smart bulbs and connected troffers.

For engineers reviewing the AL1772T16E-13 datasheet, AL1772T16E-13 pinout, AL1772T16E-13 application, or AL1772T16E-13 equivalent, this device serves as a system-level 2-stage lighting IC enabling PFC + dual-channel CC regulation without optocouplers, supporting Energy Star-compliant standby power and adaptive thermal management in compact form factors.

Technical Context

The AL1772 implements a primary-side regulated (PSR), valley-switching quasi-resonant PFC stage that regulates output voltage via FB pin sampling of auxiliary winding voltage, with constant-on-time control and OVP-triggered max-off-time recovery. Its dual linear LED driver uses independent REF1/REF2 current references and PWM1/PWM2 inputs to deliver precise, flicker-free dimming per channel.

Adaptive Thermal Management (ATM) dynamically adjusts LED current via LEDPG pin feedback to prevent thermal runaway, while fault reporting on FAULTB pin covers UVLO, OTP, LED open/short, and PFC OVP/OSP conditions-each with dedicated deglitch timing and hiccup-mode recovery.

Key Specifications

Pinout & Package

TSSOP-16EP (Type DX) package with exposed thermal pad (EP) requiring direct connection to PCB ground plane and thermal vias for θJC = 15°C/W performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel linear LED driver + PFC controller applications.

Compared with AL1771T16E-13, the AL1772T16E-13 adds full dual-channel support without increasing package size; versus NCL30488DR2G, it reduces total component count by 6+ parts and eliminates optocoupler-related reliability risks.

Availability

AL1772T16E-13 is available at Aetrix Electronics and suitable for smart LED bulbs, tunable-white luminaires, and connected troffers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant green packaging.

Supply support for AL1772T16E-13 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and lighting applications.

The AL1772 belongs to Diodes' Connected Lighting Solutions product line, engineered specifically for smart, energy-efficient LED drivers with integrated PFC and digital dimming interfaces.

FAQ

What is the maximum total LED current supported by AL1772T16E-13?

The AL1772T16E-13 supports up to 250mA per channel, for a total of 500mA across both LED1 and LED2 outputs. This is defined by internal current mirrors and validated under RSET1 = RSET2 = 12kΩ at TA = 25°C, with derating above 85°C ambient per θJA = 50°C/W.

Does AL1772T16E-13 require an external optocoupler for PFC regulation?

No. The AL1772T16E-13 uses primary-side regulation (PSR) with FB pin sampling of the transformer's auxiliary winding voltage, eliminating the need for optocouplers, TL431 references, or secondary-side feedback circuitry-reducing BOM cost and improving reliability.

How does Adaptive Thermal Management (ATM) function in practice?

ATM monitors die temperature via on-chip sensor and scales LED current downward by sinking 0.5–32µA from LEDPG pin. At 150°C junction, LED current reduces ~30%; full thermal shutdown occurs only at 160°C, with automatic recovery once temperature falls below 130°C.

Can AL1772T16E-13 operate with 120VAC and 230VAC inputs?

Yes. The integrated PFC controller supports universal 85–265VAC input, as confirmed in Figure 1 and Figure 2 of DS41314. The PFC stage generates a stable DC bus (typically 12–24V) regardless of input voltage, enabling single-BOM designs for global markets.