DIODES AL5890-xx xEV5 10-40mA 400V Constant Current Regulator User Guide

DIODES AL5890-xx xEV5 10-40mA 400V Constant Current Regulator

General Description

The AL5890 is a two terminal constant current linear LED driver and it provides a cost-effective solution. It offers an excellent temperature stability and the current accuracy <±2.0mA (typ.) over a wide voltage range. The AL5890 simplifies the design for linear LED drivers allowing it to be designed as a high or low-side constant current regulator without any external components.

The AL5890 turns on immediately and can swing from 7V up to 400V enabling it drive long LED chains. The floating ground, 400V Voltage rating between Input and Output pins designed to withstand the high peak voltage incurred in DC and offline applications.

The AL5890 is available in thermally robust package PowerDI®123 (Type B), SOT89 and TO252 (Standard) packages.

Key Features

• Low Minimum Operating Voltage (7V to 400V)
• -40˚C to 125˚C Temperature Range
• <±2.0mA LED Current Accuracy
• PDI123, SOT89, and TO252 packages

Applications

• Constant LED Current Driver
• Isolated Offline LED Converters
• LED Signs
• Instrumentation Illumination

Specifications

Top-View EVM (AL5890EV5)

AL5890EV5 (TO252) or (SOT89) or (PDI123)

Evaluation Board Connection Setup

The AL5890 can also be used at the high side of the IC, see Figure 1 and 2. The minimum system input voltage can be calculated by: VIN(MIN) = VLED_CHAIN + 7V, Where VLED_CHAIN is the LED chain voltage.

High Current Requirement in Parallel Configuration

The LED current can be increased by connecting two or more AL5890 in parallel as Figure 5.

Schematic

For AL5890EV5 (PDI123)

Bill of Material

#| Name| Quantity| Part number| Manufacturer| Description
---|---|---|---|---|---
1| U1| 1| AL5890-xxP1-13 or AL5890-xxY-13 or AL5890-xxD-13| Diodes Inc| Constant Current Regulator in PDI123 or SOT-89 or TO252

Ordering Information

Marking Information

PowerDI123 (Type B)

SOT-89

TO252 (Standard)

Typical Performance Characteristics (20mA) PDI options

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AL5890-xx xEV5 Rev1 Page 8 of 8
March 2019
www.diodes.com

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