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AL8821 (NRND)

NRND = Not Recommended for New Design

50V, 2A BOOST LED DRIVER

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Description

The AL8821 is a boost converter that delivers an accurate constant current for MR16 and similar LED Lamps. With proprietary control scheme, the LED driver is compatible with many commonly used electronic transformers and provides designs with High Power Factor (PF) and low Total Harmonic Distortion (THD) for these applications. The operation frequency is up to 1MHz that allows the use of small size inductor. With the package of SO-8EP, the AL8821 has small thermal resistance and can be used for wide range of output power. The driver can be used for dimmable MR16 application and can be compatible with leading-edge dimmer and trailing-edge dimmer.

Feature(s)

Wide Input Voltage Range: 5V to 36V
Internal 40V NDMOS Switches
Continuous Conduction Mode (CCM) Operation
Up to 1MHz Switching Frequency
High PF > 0.9 and Low THD < 30% and low Ripple < 20%
Compatible With Leading-edge Dimmer And Trailing-edge Dimmer
Internal Protections
Under Voltage Lock Out (UVLO)
Output Open
Over Temperature Protection (OTP)

Application(s)

Non-dimmable MR16 Lamps
Dimmable MR16 Lamps
General Illumination Lamps

Specifications & Technical Documents

Product Parameters

AEC Qualified	No
AEC-Q100 Grade	No
Compliance (Only Automotive Supports PPAP)	Standard
Dimming (Analog)	No
Dimming (PWM)	No
Efficiency (%)	85
Efficiency (%)	85
LED Current Accuracy (%)	5
LED Current Accuracy (%)	5
MaximumInput Voltage (V)	36
Maximum LED Current (A)	1
Maximum LED Current (A)	1
Maximum Output Voltage (V)	36
Maximum Output Voltage (V)	36
MinimumInput Voltage (V)	5
OperatingTemperatureRange (°C)	-40 to 105
Operating Temperature Range (°C)	-40 to 105
AEC Qualified	No
Sense/Feedback Voltage (mV)	100
Sense/Feedback Voltage (mV)	100
Switching Frequency Maximum (kHz)	1000
Switching Frequency Maximum (kHz)	1000
Topologies (Boost)	Yes
Topologies (Buck-Boost)	No
Topologies (Buck)	No
Topologies (SEPIC)	No

Technical Documents

SPICE Model

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2602	2023-01-31	2023-07-31	Device End of Life (EOL)
PCN-2512	2021-04-16	2021-07-16	Qualified Additional Assembly & Test (A/T) Site