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부품번호 | MLX10803 기능 |
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기능 | Automotive high power LED driver | ||
제조업체 | Melexis | ||
로고 | |||
전체 25 페이지수
IC specification MLX10803
Automotive high power LED driver
Features
General
• Low cost power LED driver for external n-channel MOSFET
switching transistor
• 6V to 32V DC input range
• Applications from mA to several Ampere LED current
• Possible temperature dependent regulation using external
Negative Temperature Coefficient (NTC) resistor
• Small package allows compact module design with
minimised wire runs and short connections to achieve
improved EMC performance
• Built-in randomizer for improved EMC performance
• High temperature operation capable
• Load dump protected to 80V
LED driver
• High energy efficiency
• PWM dimming via VS/PWM pin
• Light output has minimized dependency on supply and
temperature variations
• LED regulation parameters set with external resistors
VREF
ROSC
IREF1
IREF2
1
2
3
4
10803
(SO8)
8 VS/PWM
7 DRVGATE
6 GND
5 RSENSE
Ordering Information
Part Nr
MLX10803
Temperature Code
K (-40°C to 125°C)
Package Code
DC (SOIC8)
General Description
The MLX10803 is a multi-purpose LED driver for high power LEDs designed for automotive applications.
Numerous adjustment possibilities allow for the design of different LED applications using only a few external
components.
The circuit is load dump protected for a 80V load dump pulse.
3901010803
Author: ALX, VAR revised: TFR/VAR
Page 1/25
Rev 018 28/SEP/05
Free Datasheet http://www.datasheet4u.com/
IC specification MLX10803
Automotive high power LED driver
1. Typical application data
1.1. LED driver applications
1.1.1. Principle complete schematic LED driver diagram
VBAT
Cap for EMC directly
on the connector
100nF...1uF
PWM
100nF
RS_SET
GND
VREF
ROSC
IREF1
IREF2
VS/PWM
DRVGATE
GND
RSENSE
NTC
Figure 1: Application with dimming via PWM/VS pin, a second light output set
by an analogue voltage on input VREF and temperature regulation
1.1.2. Principle minimum schematic LED driver diagram
Cap for EMC directly
on the connector
100nF...1uF
VBAT
100nF
VREF
ROSC
IREF1
IREF2
VS/PWM
DRVGATE
GND
RSENSE
GND
Figure 2: Basic application without dimming and temperature regulation
3901010803
Author: ALX, VAR revised: TFR/VAR
Page 4/25
Rev 018 28/SEP/05
Free Datasheet http://www.datasheet4u.com/
4페이지 IC specification MLX10803
Automotive high power LED driver
2. Application pins
Nr. Name
1 VREF
2 ROSC
3 IREF1
4 IREF2
5 RSENSE
6 GND
7 DRVGATE
8 VS/PWM
Function
CMOS input, peak current reference
External resistor sets internal Oscillator frequency. Sets the average discharge time of the coil
External NTC resistor for temperature down regulation
External resistor sets the temperature breakpoint when the NTC resistor starts down regulation
External sense resistor pin for peak current detection
Ground
Pin driving the gate of the switching transistor
Supply Voltage / PWM signal
3. Absolute maximum ratings
Parameter
Power supply (VS/PWM)
Symbol
vs
Condition Min
DC -0.3
Power supply, non operational function (off)
max. 0.5s (Load dump)
Maximum input current in protection circuitry
on any pin
Maximum input voltage on RSENSE
Maximum input voltage on IREF2, IREF1,
VREF
Maximum input voltage on ROSC
vsmax
max 0.5s 32
Iprot
virsense
Vihv
In case of
maximum
supply
ratings
-10
-0.3
-0.3
vdrvgatmax with load -0.3
Maximum junction temperature
Lifetime
Dynamic
Storage temperature
Ambient temperature range
Thermal resistance junction to ambient
Tjunc
tambient
rth
-40C
-40
-40
-55
Max
32
Unit
V
80 V
10 mA
11
80
Vdd+0.3
140
150
150
125
120 (SO8)
V
V
C
C
K/W
3901010803
Author: ALX, VAR revised: TFR/VAR
Page 7/25
Rev 018 28/SEP/05
Free
Da
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부품번호 | 상세설명 및 기능 | 제조사 |
MLX10801 | Power LED driver | Melexis |
MLX10803 | Automotive high power LED driver | Melexis |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |