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IC manufacturers Diodes Incorporated

Diodes Incorporated AL8861 | Demoboard AL8861EV2

AL8861EV2 EVALUATION BOARD USER GUIDE

Overview

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

Description

The AL8861EV2, 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 1.5A 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 1.5A)

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
744771122SPEC
9 files WE-PD SMT Power Inductor 22 3.37 3.77 31 36 13.5 1260 Standard
744771133SPEC
9 files WE-PD SMT Power Inductor 33 2.68 3 49 57 11 1260 Standard
744771147SPEC
9 files WE-PD SMT Power Inductor 47 2.21 2.6 72 75 9.2 1260 Standard
744771168SPEC
9 files WE-PD SMT Power Inductor 68 1.91 2.19 96 120 7.6 1260 Standard
74477120SPEC
9 files WE-PD SMT Power Inductor 100 1.53 1.7 150 160 6.6 1260 Standard
744771215SPEC
9 files WE-PD SMT Power Inductor 150 1.21 1.43 185 230 4.4 1260 Standard
744771220SPEC
9 files WE-PD SMT Power Inductor 220 0.96 1.2 290 400 3.8 1260 Standard
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples