DIODES AL5816QEV2 4.5V 60VDC Linear LED Driver User Guide

DIODES AL5816QEV2 4.5V 60VDC Linear LED Driver

General Description

The AL5816Q is a 5-terminal adjustable constant current linear LED controller offering excellent temperature stability and current capability. The AL5816Q can work with a wide input voltage range from 4.5V to 60V. With its low 200mV current sense FB voltage, it controls the regulation of LED current with minimum power dissipation compared with traditional linear LED drivers. This makes it ideal for medium to high current LEDs. The device has an internal output drive up to 15mA, which enables it to drive external bipolar transistors or MOSFETs. It also provides the capability to drive longer LED chains with low drop-out voltage and multiple LED channels.

The AL5816Q has an LED currently adjusted and controlled by a sense resistor connected across FB pin and GND. The voltage across this resistor is controlled to a precise 0.2V thus controlling the current. The AL5816Q can be dimmed by a PWM signal through a PWM pin, it can run at frequencies higher than 200Hz. The AL5816Q is available in SOT25 package, and is Automotive- Compliant, qualified to AEC-Q100 Grade 1, supporting PPAP documentation.

Applications

• Linear LED Driver
• LED Signs
• Instrumentation Illumination
• Refrigerator Lights

Key Features

• Qualified to AEC-Q100 Grade 1
• Wide Input Voltage Range from 4.5~ 60V
• Low Reference Voltage (VFB = 0.2V)
• 5% Reference Voltage Tolerance
• Up to 15mA Driver Capability for Bipolar Transistor
• PWM Dimming Capable
• Input Under Voltage Lock-out
• Over Temperature Shutdown

AL5816QEV2 Specifications

Overview

Connection Instructions

• Power Supply Input: 4.5~16VDC (VIN+, GND)
• Connect 8 channels LED string anode to Vo+ of P1 connector;
• Connect LED string cathode to LED1- ~ LED8- of P1 connector;
• For PWM dimming operation: supply a 0-3.3V 200Hz~500Hz signal between PWM & GND.

Evaluation Board Schematic

Evaluation Board Schematic

Evaluation Board Layout

Evaluation Board Schematic

PCB Board Layout Top View

Quick Start Guide

1. By default, the LED current of the evaluation board is preset at 150mA per channel.
2. Ensure that the DC source is switched OFF or disconnected before soldering or connecting.
3. Connect the anode wire of the external LED string to Vo+ of P1 connector.
4. Connect the cathode wire of external LED string to LEDx- of P1 connector.
5. Connect two DC line wires to the VIN and GND terminals on the evaluation board.
6. Ensure that the area around the board is clear and safe, and preferably that the board and LEDs are enclosed in a transparent safety cover.
7. Turn on the main switch. LED string should light up.

Bill of Material

SOT223
R1,R2,R3,R4,R5,R6,R7,R8| 10ohm, 1%, 0805| 0805
RS2,RS4,RS6,RS8,RS10,RS12,RS14,RS16| 2R7, 1%, 1206| 1206
RS1,RS3,RS5,RS7,RS9,RS11,RS13,RS15| 2R4, 1%, 1206| 1206
R9| 10ohm, 5%, 0805| 0805
C1,C2| MLCC, 10uF,50V, 1210| 1210
C3| MLCC, 3.3uF,50V, 1206| 1206
C7,C8,C9,C10,C11,C12,C13,C14| MLCC, 100nF,50V, 0805| 0805
C5| MLCC, 330nF,50V, 0805| 0805
P1| Connector,9Pin,Pitch=2.54mm| –
VIN| PC test point, 0.06inch(1.6mm), red| –
PWM| PC test point, 0.06inch(1.6mm), white| –
GND| PC test point, 0.06inch(1.6mm), black| –
VCC| PC test point, 0.06inch(1.6mm), yellow| –
OUT| PC test point, 0.06inch(1.6mm), yellow| –
FB| PC test point, 0.06inch(1.6mm), yellow| –
PCB| FR4, 2oz, 90mm x 65mm| –
U1| IC, AL5816Q, AEC-Q100 Grade 1, DIODES| SOT25

System Performance

Test @ VLEDx = 9.1V

Waveforms

Turn ON:

Turn OFF:

PWM Dimming (fPWM=200Hz):

PWM Dimming Curve in 200Hz

BCI Test:
EVB can pass ISO11452-4 200mA BCI test without LED flicker and output current decrease.

EMI Test:
CE Test: (CISPR 25 Class 5, minimum margin = 9.27dB)

Critical_Freqs

RE Test: (CISPR 25 Class 5, minimum margin = 10.25dB)

150kHz~28MHz

Critical_Freqs

Frequency| MaxPeak| Average| Limit| Margin| Corr.
---|---|---|---|---|---
MHz| dBμV/m| dBμV/m| dBμV/m| dB| dB/m
53.00| 10.09| —| 28.00| 17.91| -14.3
54.25| 17.75| —| 28.00| 10.25| -14.5
86.75| —| -4.22| 15.00| 19.23| -14.6
164.10| —| 0.19| 15.00| 14.81| -10.4
173.45| 13.34| —| 26.00| 12.66| -10.0
174.05| —| 0.84| 15.00| 14.16| -9.9

30MHz~200MHz

Critical_Freqs

200MHz~960MHz

Critical_Freqs

Frequency| MaxPeak| Average| Limit| Margin| Corr.|  | Frequency| MaxPeak| Average| Limit| Margin| Corr.
---|---|---|---|---|---|---|---|---|---|---|---|---
MHz| dBμV/m| dBμV/m| dBμV/m| dB| dB/m| MHz| dBμV/m| dBμV/m| dBμV/m| dB| dB/m
219.70| 11.67| —| 26| 14.33| -13.3| 228.25| 10.83| —| 26| 15.17| -12.9
244.90| 12.25| —| 26| 13.75| -12.1| 240.75| 11.14| —| 26| 14.86| -12.2
433.60| —| 3.44| 18| 14.56| -7.7| 437.75| —| 3.39| 18| 14.61| -7.5
433.80| 17.28| —| 32| 14.72| -7.7| 443.70| —| 3.84| 18| 14.16| -7.3
444.85| —| 3.99| 18| 14.01| -7.2| 444.45| 16.79| —| 32| 15.21| -7.2
915.65| —| 9.73| 24| 14.27| -0.8| 913.30| —| 9.42| 24| 14.58| -0.8

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