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IC manufacturers Diodes Incorporated

Diodes Incorporated AL8861 | Demoboard AL8861EV1

40V 1.5A BUCK LED DRIVER

Overview

TopologyBuck Converter
Input voltage4.5-40 V
Switching frequency1000 kHz
IC revision1

Description

The AL8861EV1, Figure 1, is a double sided evaluation board for the AL8861 step-down, or ‘buck’, LED driver with internal switch. The evaluation board is preset to drive 680mA into a single LED, or multiple LEDs, the maximum number of which depends on their total forward voltage drop and the supply voltage. (The maximum drive current of the AL8861 is 1000mA)

Features

  • Low BOM Counts
  • Wide Input Voltage Range: 4.5V to 40V
  • Output Current up to 1.5A
  • Internal 40V NDMOS Switch
  • Typical 5% Output Current Accuracy
  • Single Pin for On/Off and Brightness Control by DC Voltage or PWM Signal
  • Recommended Analog Dimming Range: 5% ~100%
  • Soft-Start
  • High Efficiency (up to 97%)
  • LED Short Protection
  • Inherent Open-Circuit LED Protection
  • Rs Short Protection
  • Over Temperature Protection (OTP)
  • Up to 1MHz Switching Frequency
  • Pb-free TSOT25 and SOT89-5 Packages

Typical applications

  • External Driver with Multiple Channels
  • LED Retrofit for Low Voltage Halogen / Low Voltage Industrial Lighting / LED Backlighting / Illuminated Signs

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
7447713220SPEC
9 files WE-PD SMT Power Inductor 22 1.7 2.7 111 133 17.5 1030 Performance
7447713330SPEC
9 files WE-PD SMT Power Inductor 33 1.35 2.2 170 204 13 1030 Performance
7447713470SPEC
9 files WE-PD SMT Power Inductor 47 1.2 1.9 207 248 11.4 1030 Performance
7447713680SPEC
9 files WE-PD SMT Power Inductor 68 1.1 1.6 275 330 9.4 1030 Performance
7447713101SPEC
9 files WE-PD SMT Power Inductor 100 0.9 1.4 398 478 7.7 1030 Performance
7447713151SPEC
9 files WE-PD SMT Power Inductor 150 0.7 1.1 570 684 6.1 1030 Performance
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples