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Six-String WLED Driver with Integrated
Step-Up Converter
Shutdown
The MAX17127 can be placed into shutdown by pulling
the EN pin low. When a critical failure is detected, the
IC also enters shutdown mode. In shutdown mode, all
functions of the IC are turned off, including the 5V lin-
ear regulator. Only a crude linear regulator remains on,
providing a 3.3V (typ) output voltage to V DDIO with 1 F A
current-sourcing capability.
Frequency Selection
The boost converter switching frequency can be adjust-
ed by the external resistor on the FSLCT pin. The
switching frequency adjustable range is 250kHz to
1MHz. High-frequency (1MHz) operation optimizes the
regulator for the smallest component size at the expense
of efficiency due to increased switching losses. Low-
frequency (250kHz) operation offers the best overall effi-
ciency, but requires larger components and PCB area.
V IN
0V
V OUT
I LED
0V
V EN
0V
V DDIO
0V
Figure 3. Startup Sequence
CHECK LED
STEP-UP REGULATOR
SOFT-START
MIN FB_ CONTROL
(1ms)
14
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相关代理商/技术参数
MAX17127ETP+T 功能描述:LED照明驱动器 Six String WLED Drvr w/Integrated MOSFET 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
MAX17127EVKIT+ 功能描述:电源管理IC开发工具 MAX17127 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
MAX17129AETE+ 功能描述:LED照明驱动器 Six String WLED Drvr w/Integrated MOSFET 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
MAX17129AETE+T 功能描述:LED照明驱动器 Six String WLED Drvr w/Integrated MOSFET 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
MAX17129ETE+ 功能描述:LED照明驱动器 Six String WLED Drvr w/Integrated MOSFET 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
MAX17129ETE+T 功能描述:LED照明驱动器 Six String WLED Drvr w/Integrated MOSFET 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
MAX17129EVKIT+ 功能描述:电源管理IC开发工具 MAX17129 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
MAX1712EEG 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:Swithed-Mode Power Supply Controller, Current Mode Type, 24 Pin, Plastic, SSOP