MAX8821 Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
производитель
MAX8821 Datasheet PDF : 29 Pages
| |||
White LED Charge Pump with Mono Class D
Audio Amp and Dual LDO
Typical Operating Characteristics (continued)
(VIN1 = VIN2 = VIN3 = VDD = 3.6V, VAGND = VPGND1 = VPGND2 = 0V, circuit of Figure 2, TA = +25°C, unless otherwise noted.)
LED CURRENT vs. AMBIENT
TEMPERATURE
30
25
20
15
10
5
0
-40 -20
CURRENT DERATING ENABLED
0 20 40 60 80 100
TEMPERATURE (°C)
1x MODE OPERATING
WAVEFORMS (VIN = 4V)
MAX8821 toc08
AC-COUPLED
VIN
100mV/div
2V/div
VNEG
0V
IIN
200mA/div
0A
20mA/div
ILED
ALL LEDs ON, ILED = 25.6mA
0A
400ns/div
1.5x MODE OPERATING
WAVEFORMS (VIN = 3V)
MAX8821 toc09
LED LINE TRANSIENT WITH MODE CHANGE
(VIN = 3.8V TO 3.4V TO 3.8V)
MAX8821 toc10
LED LINE TRANSIENT WITH MODE CHANGE
(VIN = 4.2V TO 3.8V TO 4.2V)
MAX8821 toc11
AC-COUPLED
100mV/div VIN
3.8V
VIN
4.2V
VIN
3.4V
3.8V
0V
VNEG
2V/div
IIN
200mA/div
IIN
IIN
200mA/div
200mA/div
0A
0A
0A
ILED
20mA/div ILED6
20mA/div ILED6
20mA/div
ALL LEDs ON, ILED = 25.6mA
0A
400ns/div
ALL LEDs AT 25.6mA SETTING 0A
1ms/div
ALL LEDs AT 25.6mA SETTING 0A
1ms/div
LED STARTUP WAVEFORMS
(VIN = 4V)
MAX8821 toc12
LED SHUTDOWN WAVEFORMS
(VIN = 4V)
MAX8821 toc13
LED RAMP-UP
MAX8821 toc14
VIN
AC-COUPLED
50mV/div
VIN
AC-COUPLED
50mV/div
10mA/div
ILED6
0A
50mA/div
IIN
50mA/div
IIN
0A
0A
10mA/div
20mA/div ILED6
20mA/div
ILED5
0A
0A
ILED6
0A
1ms/div
1ms/div
400ms/div
_______________________________________________________________________________________ 9
Share Link: 