MAX1575 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1575 Datasheet PDF : 9 Pages
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White LED 1x/1.5x Charge Pump
for Main and Sub-Displays
Typical Operating Characteristics (continued)
(VIN = 3.6V, ENM = ENS = IN, circuit of Figure 2, TA = +25°C, unless otherwise noted.)
OUTPUT CURRENT vs. SUPPLY VOLTAGE
DRIVING SIX LEDs AT 20mA EACH
123
100
LED CURRENT vs. RSET
122
121
120
10
119
118
100% BRIGHTNESS SETTING
117
1
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
1
10
100
SUPPLY VOLTAGE (V)
RSET (kΩ)
OPERATING WAVEFORMS (1x)
MAX1575 toc09
VOUT
200mV/div
AC-COUPLED
VIN
50mV/div
AC-COUPLED
IIN
50mA/div
0mA
400ns/div
OPERATING WAVEFORMS (1.5x)
MAX1575 toc10
200mV/div
VENM
VOUT
AC-COUPLED AND VENS
VIN
50mV/div
AC-COUPLED
IIN
50mA/div
IIN
VOUT
0
400ns/div
STARTUP WAVEFORMS
MAX1575 toc11
5V/div
MAIN STARTUP WITH SUB-DISPLAY ON
MAX1575 toc12
VENM
5V/div
1ms/div
100mA/div IIN
0
VOUT
2V/div
0
1ms/div
100mA/div
0
500mV/div
VENM
AND VENS
IOUT
VOUT
DIMMING RESPONSE
MAX1575 toc13
2V/div
LINE TRANSIENT 3.8V TO 3.3V TO 3.8V
MAX1575 toc14
VIN
1V/div
10ms/div
50mA/div
VOUT
0
IOUT
2V/div
40μs/div
1V/div
AC-COUPLED
50mA/div
0mA
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