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MAX1553 Fiches technique(PDF) 5 Page - Maxim Integrated Products

No de pièce MAX1553
Description  High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs
Download  11 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1553 Fiches technique(HTML) 5 Page - Maxim Integrated Products

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High-Efficiency, 40V Step-Up
Converters for 2 to 10 White LEDs
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(MAX1553 driving six white LEDs, VCC = VEN = 3.6V, Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
SWITCHING WAVEFORMS
(CONTINUOUS OPERATION,
3.75V Li+ BATTERY, 18mA OUTPUT)
MAX1553/54 toc10
2
µs/div
VLX
VOUT
IL
10V/div
200mV/div
200mA/div
L1 = 47
µH, 4700pF CAPACITOR ACROSS LEDs
SWITCHING WAVEFORMS
(DISCONTINUOUS OPERATION,
3.75V Li+ BATTERY, 10mA OUTPUT)
MAX1553/54 toc11
2
µs/div
VLX
VOUT
IL
10V/div
200mV/div
200mA/div
L1 = 47
µH, 4700pF CAPACITOR ACROSS LEDs
STARTUP/SHUTDOWN WAVEFORMS
MAX1553/54 toc12
40ms/div
VEN
VFB
VOUT
5V/div
200mV/div
10V/div
L1 = 22
µH
BRT STEP RESPONSE
MAX1553/54 toc13
20ms/div
VBRT
VFB
VOUT
1V/div
200mV/div
2V/div
L1 = 22
µH,
VBRT = 0.5V TO 1.25V TO O.5V


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