MAX8647 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8647 Datasheet PDF : 15 Pages
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Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
C3
C2
1μF
1μF
VIN
2.7V TO 5.5V
IN
C1
1μF
GND
C1P
C1N C2P
C2N
INVERTING
CHARGE PUMP
1MHz
OSCILATOR
SEL
MIN
CURRENT
REGULATOR
VDD (ENA)
SCL (ENB)
SDA (ENC)
I2C OR
SERIAL PULSE
INTERFACE
AND CONTROL
CURRENT BIAS
SOURCE
CONTROL
THERMAL
SHUTDOWN
CURRENT
REGULATOR
CURRENT
REGULATOR
TP7
NEG
C4
EP
1μF
VIN
LED1
LED2
LED3
CURRENT
LED4
REGULATOR
MAX8647
MAX8648
CURRENT
LED5
REGULATOR
CURRENT
LED6
( ) ARE FOR THE MAX8648
REGULATOR
Figure 1. Block Diagram and Application Circuit
Shutdown Mode
The MAX8647 is shutdown when all LEDs are turned off
through the I2C port. In shutdown, the I2C port is still
active and ready to receive a command.
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.
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