 English |
|
|
|
|
|
|
|
| MAX1553_15 Datasheet, PDF (5/10 Pages) Maxim Integrated Products – High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs | |||
| |||
| ◁ |
MAX1553/MAX1554
High-Efficiency, 40V Step-Up
Converters for 2 to 10 White LEDs
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
SWITCHING WAVEFORMS
(DISCONTINUOUS OPERATION,
3.75V Li+ BATTERY, 10mA OUTPUT)
MAX1553/54 toc11
VLX
10V/div
VLX
10V/div
VOUT
200mV/div
IL
200mA/div
2μs/div
L1 = 47μH, 4700pF CAPACITOR ACROSS LEDs
STARTUP/SHUTDOWN WAVEFORMS
MAX1553/54 toc12
VEN
5V/div
VFB
VOUT
L1 = 22μH
40ms/div
200mV/div
10V/div
VOUT
200mV/div
IL
200mA/div
2μs/div
L1 = 47μH, 4700pF CAPACITOR ACROSS LEDs
BRT STEP RESPONSE
MAX1553/54 toc13
VBRT
1V/div
VFB
200mV/div
VOUT
2V/div
20ms/div
L1 = 22μH,
VBRT = 0.5V TO 1.25V TO O.5V
www.maximintegrated.com
Maxim Integrated | 5
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese