MAX8648 Maxim Integrated Products, MAX8648 Datasheet - Page 6

• Manufacturer Part Number: MAX8648
• Description: (MAX8647 / MAX8648) Ultra-Efficient Charge Pumps
• Manufacturer: Maxim Integrated Products

www.DataSheet4U.com
Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
(V
6
IN
30
25
20
15
10
_______________________________________________________________________________________
5
0
= 3.6V, V
-40
LED CURRENT vs. TEMPERATURE
-15
EN_
I
I
V
LED5
LED6
EN_
V
V
I
I
IN
IN
TEMPERATURE (°C)
IN
IN
= V
10
IN
(V
, circuit of Figure 1, T
LINE-TRANSIENT RESPONSE
STARTUP AND SHUTDOWN
IN
35
= 4.3V TO 3.8V TO 4.3V)
(MAX8648)
60
1ms/div
1ms/div
85
ENA = ENB = ENC
MAX8647/48 toc16
MAX8647/48 toc18
A
I
V
LED
I
IN
IN
= +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
1x MODE OPERATING WAVEFORMS
200mA/div
200mA/div
24mA
20mA/div
2V/div
AC-COUPLED
20mV/div
0A
2V/div
0A
4.3V
3.8V
0A
(V
400ns/div
IN
= 4V)
ALL LEDs ON
I
LED
MAX8647/48 toc14
TOTAL I
= 24mA
V
LED5
I
LED6
EN_
V
I
IN
IN
100mA/div
0A
20mA/div
0A
AC-COUPLED
100mV/div
LINE-TRANSIENT RESPONSE WITH MODE
CHANGE (V
SINGLE-WIRE PULSE DIMMING
I
LED
V
I
IN
IN
IN
(MAX8648)
= 3.8V TO 3.4V TO 3.8V)
1.5x MODE OPERATING WAVEFORMS
10ms/div
1ms/div
OPERATING IN 1x
MODE, ALL 6 LEDs
OPERATING
MAX8647/48 toc17
(V
MAX8647/48 toc19
400ns/div
IN
= 3V)
20mA/div
0A
5V/div
200mA/div
24mA
20mA/div
3.8V
3.4V
0mA
ALL LEDs ON
I
LED
MAX8647/48 toc15
= 24mA
100mA/div
20mA/div
0A
AC-COUPLED
100mV/div
0A