EVB10803 Melexis Company, EVB10803 Datasheet

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EVB10803

Manufacturer Part Number
EVB10803
Description
Evaluation Board Evb10803 Power Led Driver For Automotive Applications
Manufacturer
Melexis Company
Datasheet
1.
This document describes the design and use of the MLX10803 evaluation board. For a general description about
the functionality of the MLX10803 please refer to the MLX10803 data sheet.
Note: Evaluation boards produced before Q1 2006 use the MLX10803A. Some resistor values and corresponding
parameters differ from the circuit presented in this document. Please consult the MLX10803 internet product page
at
2.
The MLX10803 evaluation board is intended to be used as an application example of the MLX10803 Power LED
driver. It was developed to demonstrate the features of the circuit and is suitable to be used in prototypes and
mock ups to allow quick implementation of the MLX10803 in a LED lighting application.
3.
LED(s):
Optional NTC: - external temperature sensor
4.
Figure 1: Evaluation board schematic
390121080301
20/Mar/2006
Author: SSZ
http://www.melexis.com
Scope
Applications
Other Components Needed
Application Circuit
- all High Brightness LEDs, e.g.:
Rev. 5.01
Lumileds Luxeon
Cree XLamp™ 3 7090 series, Cree XLamp™ 7090 series
OSRAM (Advanced) Power TOPLED
Nichia POWER LED Series
Standard NTC thermistor with R
for the latest updates.
®
Evaluation board EVB10803
, Lumileds Luxeon III
Power LED driver for automotive applications
T=25° C
= 100k ..470k
®
, OSRAM Golden Dragon
®
Page 1/8

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EVB10803 Summary of contents

Page 1

... Optional NTC: - external temperature sensor Standard NTC thermistor with R 4. Application Circuit Figure 1: Evaluation board schematic 390121080301 Rev. 5.01 20/Mar/2006 Author: SSZ Evaluation board EVB10803 Power LED driver for automotive applications ® , Lumileds Luxeon III ® , OSRAM Golden Dragon = 100k ..470k T=25° C ® ...

Page 2

... Pin6 GND Figure 2: Evaluation board dimensions and locations 390121080301 Rev. 5.01 20/Mar/2006 Author: SSZ Evaluation board EVB10803 Power LED driver for automotive applications Connection general load and IC supply, 6..32V DC supply ground Separate IC supply for PWM usage Additional ground for VS/PWM signal Voltage reference input VREF ...

Page 3

... IC correctly. The PWM signal must be able to drive the IC’s supply current which is maximum 700µA @13.8V and 2mA @32V. 390121080301 Rev. 5.01 20/Mar/2006 Author: SSZ Evaluation board EVB10803 Power LED driver for automotive applications ) of the selected coil. Thus, the average LED current is sat Page 3/8 ...

Page 4

... So, the overall resistance of IREF1 is similar to the resistance on pin IREF2 at that corner temperature. For a better illustration, an example is given below IREF Start 390121080301 Rev. 5.01 20/Mar/2006 Author: SSZ Evaluation board EVB10803 Power LED driver for automotive applications nd LED current/light output used for example in combined Page 4/8 ...

Page 5

... Depending on the thermal design and the ambient temperatures of the module, the regulation works faster or slower around the adjusted corner temperature point. The following schematic shows the connection of an external temperature sensor to the EVB10803: Figure 4: External NTC for temperature down regulation 390121080301 Rev ...

Page 6

... R6, R7 Resistor 0805 type manufacturer codes: FCH = Fairchild Semiconductor WE = Würth Elektronik INF = Infineon YG = Yageo 390121080301 Rev. 5.01 20/Mar/2006 Author: SSZ Evaluation board EVB10803 Power LED driver for automotive applications Part Name Alternative Part(s) (Manufacturer) (Manufacturer) SS24 many (FCH) ES2D many, e.g. (FCH) ...

Page 7

... EMI Measurement of the EVB10803 The EVB10803 is designed for a good electromagnetic emission behaviour. Please refer to the MLX10803 IC specification as well as to the available application notes for general EMC considerations. The test was performed on the original evaluation board and the settings shown below. No additional filter components had been used. ...

Page 8

... Thus, size and cost can be reduced once more. 390121080301 Rev. 5.01 20/Mar/2006 Author: SSZ Evaluation board EVB10803 Power LED driver for automotive applications For the latest version of this document our website at: www.melexis.com Or for additional information contact Melexis Direct: ...

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