MAX8648 Maxim Integrated Products, MAX8648 Datasheet - Page 9

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

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The MAX8647 is shutdown when all LEDs are turned off
through the I
active and ready to receive a command.
Figure 1. Block Diagram and Application Circuit
2.7V TO 5.5V
V
1μF
IN
C1
Six White/RGB LEDs in 3mm x 3mm Thin QFN
2
IN
GND
V
SCL (ENB)
SDA (ENC)
DD
C port. In shutdown, the I
(ENA)
_______________________________________________________________________________________
SERIAL PULSE
AND CONTROL
INTERFACE
I
( ) ARE FOR THE MAX8648
2
C OR
MAX8647
MAX8648
C1P
Shutdown Mode
1μF
Ultra-Efficient Charge Pumps for
C3
SHUTDOWN
CURRENT
CONTROL
THERMAL
SOURCE
CHARGE PUMP
OSCILATOR
C1N
INVERTING
2
C port is still
1MHz
C2P
BIAS
1μF
C2
C2N
REGULATOR
REGULATOR
REGULATOR
REGULATOR
REGULATOR
REGULATOR
CURRENT
CURRENT
CURRENT
CURRENT
CURRENT
CURRENT
The MAX8648 is shutdown when all three EN_ are held
low for 4ms or longer. In shutdown, NEG is pulled to
GND with a 10kΩ internal resistor.
SEL
MIN
LED1
LED2
LED3
LED4
LED5
LED6
NEG
EP
TP7
V
IN
C4
1μF
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