Typical operating characteristics (continued) – Rainbow Electronics MAX8645Y User Manual
Page 6
MAX8645X/MAX8645Y
1x/1.5x/2x White LED Charge Pumps with Two
LDOs in 4mm x 4mm TQFN
6
_______________________________________________________________________________________
INDIVIDUAL FLASH LED CURRENT
vs. R
SETF
MAX8645Y toc13
R
SETF
(k
Ω)
FLASH LED CURRENT (mA)
10
20
200
2000
2
1
100
OPERATING WAVEFORMS (1x MODE)
MAX8645Y toc14
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
2mA/div
AC-COUPLED
V
OUT
V
IN
I
IN
400ns/div
6 MAIN LEDS AT 20mA EACH
OPERATING WAVEFORMS (1.5x MODE)
MAX8645Y toc15
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
2mA/div
AC-COUPLED
V
OUT
V
IN
I
IN
400ns/div
6 MAIN LEDS AT 20mA EACH
OPERATING WAVEFORMS (2x MODE)
MAX8645Y toc16
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
2mA/div
AC-COUPLED
V
OUT
V
IN
I
IN
400ns/div
6 MAIN LEDS AT 20mA EACH,
FLASH AT 400mA TOTAL
STARTUP AND SHUTDOWN
MAIN LED RESPONSE
MAX8645Y toc17
5V/div
0V
100mA/div
5V/div
0V
0A
V
ENM_
I
OUT
V
OUT
1ms/div
6 MAIN LEDS AT 20mA EACH
STARTUP AND SHUTDOWN
FLASH LED RESPONSE
MAX8645Y toc18
5V/div
0V
500mA/div
500mA/div
5V/div
0V
0A
0A
V
ENF
I
IN
V
OUT
I
OUT
1ms/div
6 MAIN LEDS AT 20mA EACH,
400mA TOTAL FLASH
Typical Operating Characteristics (continued)
(V
IN
= V
EN_
= 3.6V, circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)