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MIC4801 Datasheet(PDF) 4 Page - Micrel Semiconductor

Part # MIC4801
Description  High Efficiency 600mA Single Channel Linear WLED Driver with Ultra Fast PWM??Control
PDF  12 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC4801 Datasheet(HTML) 4 Page - Micrel Semiconductor

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Micrel Inc.
MIC4801
January 2011
4
M9999-011811-A
Typical Characteristics
LED Current
vs. LED Anode Voltage
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
2.5
3
3.5
4
4.5
5
5.5
LED ANODE VOLTAGE (V)
VIN = 5.5V
VIN = 3.5V
VIN = 3.0V
Dropout Voltage
vs. LED Current
0
25
50
75
100
125
150
175
200
225
250
275
300
0
100 200 300 400 500 600 700 800
LED CURRENT (mA)
VIN = 5V
Supply Bias Current
vs. LED Anode Voltage
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
2.5
3
3.5
4
4.5
5
5.5
LED ANODE VOLTAGE (V)
VIN = 5.5V
VIN = 2.5V
VIN = 3.0V
RSET = 4.64kΩ
Peak LED Current
vs. RSET
1
10
100
1000
1
10
100
1000
10000
RSET (kΩ)
LED Current
vs. PWM Duty Cycle
0
100
200
300
400
500
600
700
800
900
0
2040
6080
100
DUTY CYCLE (%)
fPWM = 10kHz
fPWM = 5kHz
fPWM = 1kHz
VIN = 5V
LED Current
vs. PWM Duty Cycle
0
100
200
300
400
500
600
700
800
900
0
2040
6080
100
DUTY CYCLE (%)
fPWM = 20kHz
fPWM = 200kHz
fPWM = 100kHz
fPWM = 500kHz
RSET Voltage
vs. LED Current
1.25
1.26
1.27
1.28
1.29
1.3
1.31
1.32
1.33
1.34
0
100 200 300 400 500 600 700 800
LED CURRENT (mA)
VIN = 5V
Typical ILED vs. VLED
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.4
2.6
2.8
3
3.2
3.4
3.6
LED FORWARD VOLTAGE (V)
VIN = 5.0V



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