MAX8647 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Lista de partido
MAX8647 Datasheet PDF : 15 Pages
| |||
Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
Typical Operating Characteristics (continued)
(VIN = 3.6V, VEN_ = VIN, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
LED CURRENT vs. TEMPERATURE
30
1x MODE OPERATING WAVEFORMS
(VIN = 4V)
MAX8647/48 toc14
1.5x MODE OPERATING WAVEFORMS
(VIN = 3V)
MAX8647/48 toc15
25
20
15
10
5
0
-40
-15
10
35
60
TEMPERATURE (°C)
VIN
IIN
ILED
85
AC-COUPLED
100mV/div
VIN
400ns/div
IIN
100mA/div
0A
20mA/div
ALL LEDs ON 0A
ILED
ILED = 24mA
AC-COUPLED
100mV/div
100mA/div
0A
20mA/div
400ns/div
ALL LEDs ON 0A
ILED = 24mA
STARTUP AND SHUTDOWN
(MAX8648)
MAX8647/48 toc16
ENA = ENB = ENC
2V/div
VEN_
AC-COUPLED
VIN
20mV/div
IIN
200mA/div
0A
ILED5
2V/div
0A
1ms/div
SINGLE-WIRE PULSE DIMMING
(MAX8648)
MAX8647/48 toc17
VEN_
5V/div
OPERATING IN 1x
MODE, ALL 6 LEDs
OPERATING
TOTAL ILED5
10ms/div
20mA/div
0A
LINE-TRANSIENT RESPONSE
(VIN = 4.3V TO 3.8V TO 4.3V)
MAX8647/48 toc18
4.3V
VIN
3.8V
LINE-TRANSIENT RESPONSE WITH MODE
CHANGE (VIN = 3.8V TO 3.4V TO 3.8V)
MAX8647/48 toc19
3.8V
VIN
3.4V
IIN
200mA/div
0A
24mA
ILED6
20mA/div
1ms/div
IIN
200mA/div
0mA
ILED6
24mA
20mA/div
1ms/div
6 _______________________________________________________________________________________
Share Link: 