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Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
C3
1 μ F
C2
1 μ F
V IN
2.7V TO 5.5V
IN
C1P
C1N C2P
INVERTING
C2N
NEG
TP7
C1
1 μ F
GND
CHARGE PUMP
EP
C4
1 μ F
SEL
MIN
1MHz
OSCILATOR
CURRENT
V DD (ENA)
REGULATOR
LED1
V IN
SCL (ENB)
SDA (ENC)
I 2 C OR
SERIAL PULSE
INTERFACE
AND CONTROL
CURRENT
SOURCE
CONTROL
BIAS
CURRENT
LED2
REGULATOR
THERMAL
SHUTDOWN
MAX8647
MAX8648
CURRENT
REGULATOR
CURRENT
REGULATOR
CURRENT
REGULATOR
CURRENT
LED3
LED4
LED5
LED6
( ) ARE FOR THE MAX8648
Figure 1. Block Diagram and Application Circuit
Shutdown Mode
The MAX8647 is shutdown when all LEDs are turned off
through the I 2 C port. In shutdown, the I 2 C port is still
active and ready to receive a command.
REGULATOR
The MAX8648 is shutdown when all three EN_ are held
low for 4ms or longer. In shutdown, NEG is pulled to
GND with a 10k Ω internal resistor.
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相关代理商/技术参数
MAX8648ETE 制造商:MAXIM 功能描述:Pb Free
MAX8648ETE+ 功能描述:LED照明驱动器 Charge Pump for 6 White/RGB LEDs RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MAX8648ETE+T 功能描述:LED照明驱动器 Charge Pump for 6 White/RGB LEDs RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MAX8648EVKIT+ 制造商:Maxim Integrated Products 功能描述:MAX8648 EVAL KIT - Rail/Tube
MAX8649AEWE+T 功能描述:直流/直流开关调节器 1.8A Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX8649BEWE+T 功能描述:直流/直流开关调节器 1.8A Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX8649EVKIT+ 制造商:Maxim Integrated Products 功能描述:1.8A STEP-DOWN REGULATOR W/DIFFERENTIAL REMOTE SENSE IN 2MM - Boxed Product (Development Kits)
MAX8649EWE+ 制造商:Maxim Integrated Products 功能描述:1.8A STEP-DOWN REGULATOR W/DIFFEREN - Rail/Tube