Diodes Incorporated AL9910-5SP-13

Overview

AL9910-5SP-13 from Diodes Incorporated is a universal high-voltage PWM LED driver-controller designed for offline LED lamp applications operating directly from rectified AC mains (85–277VAC). It drives external MOSFETs at up to 300kHz, regulates LED current via a 250mV current-sense threshold (±5% tolerance), supports both linear (LD pin) and PWM (PWM_D pin) dimming, and withstands input transients up to 500V. It is used in high-brightness architectural lighting and signage where thermal robustness and wide-input resilience are critical.

For engineers reviewing the AL9910-5SP-13 datasheet, AL9910-5SP-13 pinout, AL9910-5SP-13 application, or AL9910-5SP-13 equivalent, key selection criteria include its SO-8EP thermally enhanced package, 7.5V gate drive (AL9910 variant), 105°C max ambient rating, internal LDO eliminating startup resistors, and dual-dimming interface compatibility with legacy and smart lighting control systems.

Technical Context

The AL9910-5SP-13 implements a constant-current buck controller architecture using peak-current-mode regulation with blanking-interval compensation (t_BLANK = 160–440ns). Its internal 7.5V LDO powers the gate driver and logic, enabling direct high-side MOSFET drive without auxiliary bias windings.

It operates in either fixed-frequency PWM mode (set by ROSC resistor) or constant-off-time (COT) mode (ROSC tied to GATE), supporting stable operation across wide input voltage ranges (15–500VDC) and LED string configurations-from single high-current strings to multi-LED arrays-while maintaining >90% efficiency and power factor >0.9 at 220V RMS.

Key Specifications

Pinout & Package

AL9910-5SP-13 is housed in a thermally enhanced SO-8EP (Exposed Pad) package, featuring an exposed copper pad on the underside electrically and thermally connected to GND for improved heat dissipation (θ_JC = 9 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage LED driver applications.

Compared with AL9910-5SP-13, the AL9910A-5SP-13 offers higher gate drive for improved MOSFET efficiency at high currents, while the AL9910-5S-13 sacrifices thermal capability for lower cost-making the -5SP-13 the optimal choice for sealed, high-ambient outdoor LED drivers requiring long-term reliability without forced air.

Availability

AL9910-5SP-13 is available at Aetrix Electronics and suitable for architectural lighting, commercial signage, industrial machine vision backlights, and smart streetlight systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for AL9910-5SP-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 solutions, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.

The AL9910/A family belongs to Diodes' high-voltage LED driver product line, engineered specifically for cost-effective, thermally robust, offline LED lamp control-targeting applications where reliability under harsh AC-line conditions is non-negotiable.

FAQ

What is the maximum allowable ambient temperature for continuous operation of AL9910-5SP-13?

The AL9910-5SP-13 supports continuous operation up to +105°C ambient temperature, enabled by its SO-8EP package with 66°C/W junction-to-ambient thermal resistance. This rating assumes proper PCB layout: 51mm × 51mm 2oz copper top layer, thermal vias to internal ground plane, and direct connection of the exposed pad to GND. Exceeding this temperature risks activation of the 150°C thermal shutdown.

Can AL9910-5SP-13 operate without an external MOSFET?

No. The AL9910-5SP-13 is a controller-only IC and requires an external N-channel MOSFET to switch the LED current path. It provides 7.5V gate drive capable of driving MOSFETs with gate charge ≤30nC. Attempting to operate without an external MOSFET will result in no LED current flow, as the GATE pin has no internal power switch and cannot source load current.

How does the LD pin interact with PWM dimming on the PWM_D pin?

The LD pin sets the maximum current limit (by scaling the 250mV sense threshold down to 45mV), while the PWM_D pin enables/disables the entire controller. When both are used, LD defines the peak current during each PWM ON cycle, and PWM_D determines duty cycle. For example, applying 125mV to LD reduces max current to 50%, then applying 60% PWM to PWM_D yields 30% average light output-enabling precise hybrid dimming without flicker.

Is AL9910-5SP-13 compliant with IEC 61000-4-5 surge immunity requirements?

The AL9910-5SP-13 itself is not certified to IEC 61000-4-5, but its 500V absolute maximum VIN rating and robust internal structure allow it to survive common-mode surges typical in 277VAC lighting systems when paired with appropriate external MOVs and Y-capacitors. System-level compliance depends on full front-end protection design-not solely on the IC's voltage rating.