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MIC2297 Datasheet(PDF) 4 Page - Micrel Semiconductor

Part # MIC2297
Description  40V PWM Boost Regulator White LED Driver
PDF  11 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2297 Datasheet(HTML) 4 Page - Micrel Semiconductor

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Micrel
MIC2297
Mach 2008
4
M9999-032708
Typical Characteristics
3
3.5
4
4.5
5
5.5
6
23
45
67
89 10
INPUT VOLTAGE (V)
Supply Current
vs. Input Voltage
Not Switching
VFB = 1V
95
96
97
98
99
100
23
45
67
89 10
INPUT VOLTAGE (V)
Max Duty Cycle
vs. Input Voltage
400
500
600
700
800
23
45
67
89 10
INPUT VOLTAGE (V)
Frequency
vs. Input Voltage
0
200
400
600
800
1000
1200
0
500
1000
1500
SWITCH CURRENT (mA)
Switch Current
vs. Switch Voltage
VIN = 3.6V
190
195
200
205
210
215
220
23
45
67
89 10
INPUT VOLTAGE (V)
Switch Voltage
vs. Input Voltage
IFSWITCH = 0.5A
10
12
14
16
18
20
23
45
67
89 10
INPUT VOLTAGE (V)
LED Current
vs. Input Voltage
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
23
45
67
89 10
INPUT VOLTAGE (V)
BRT Voltage
vs. Input Voltage
100
120
140
160
180
200
220
240
260
280
300
23
45
67
89 10
INPUT VOLTAGE (V)
FB Voltage
vs. Input Voltage
0
5
10
15
20
25
30
10001200
BRT VOLTAGE (mV)
LED Current
vs. BRT Voltage
RSENSE
0
50
100
150
200
250
300
FB Voltage
vs. BRT Voltage
10001200
BRT VOLTAGE (mV)
70
72
74
76
78
80
23
45
67
89 10
INPUT VOLTAGE (V)
Efficiency for 10 LEDs @ 20mA
vs. Input Voltage
L = 6.8µH
40
45
50
55
60
65
70
75
80
0
5
10 15 20 25 30 35
LED CURRENT (mA)
Efficiency for 10 LEDs
vs. LED Current
L = 6.8µH
VIN = 3.2V
VIN = 3.6V
VIN = 4.2V



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