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TPS61055

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具有标准逻辑接口的 500mA 大功率白光 LED 驱动器

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TPS61055

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产品详情

Topology Boost, current mode Vin (min) (V) 2.5 Vin (max) (V) 6 Iout (max) (A) 0.5 Iq (typ) (mA) 8.5 Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Number of channels 1 Rating Catalog
Topology Boost, current mode Vin (min) (V) 2.5 Vin (max) (V) 6 Iout (max) (A) 0.5 Iq (typ) (mA) 8.5 Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Number of channels 1 Rating Catalog
VSON (DRC) 10 9 mm² 3 x 3
  • Four Operational Modes
    • Torch and Flash up to ILED = 700 mA
    • Voltage-Regulated Boost Converter: 5.0 V
    • Shutdown: 0.3 µA (Typical)
  • Total Solution Circuit Area < 25 mm2
  • Up to 96% Efficiency
  • Integrated LED Turnon Safety Timer
  • Zero Latency TX-Masking Input
  • Integrated Low Light Dimming Mode
  • LED Disconnect During Shutdown
  • Open/Shorted LED Protection
  • Over-Temperature Protection
  • Available in a 12-Pin NanoFree™ (CSP) and 10-
    Pin VSON Packaging
  • Four Operational Modes
    • Torch and Flash up to ILED = 700 mA
    • Voltage-Regulated Boost Converter: 5.0 V
    • Shutdown: 0.3 µA (Typical)
  • Total Solution Circuit Area < 25 mm2
  • Up to 96% Efficiency
  • Integrated LED Turnon Safety Timer
  • Zero Latency TX-Masking Input
  • Integrated Low Light Dimming Mode
  • LED Disconnect During Shutdown
  • Open/Shorted LED Protection
  • Over-Temperature Protection
  • Available in a 12-Pin NanoFree™ (CSP) and 10-
    Pin VSON Packaging

The TPS6105x device uses a high-frequency synchronous-boost topology with constant current sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current.

The 2-MHz switching frequency allows the use of small and low-profile 2.2-µH inductors. To optimize overall efficiency, the device operates with only a 250-mV LED feedback voltage.

The TPS6105x device not only operates as a regulated current source, but also as a standard voltage-boost regulator. This additional operating mode can be useful to supply other high-power devices in the system, such as a hands-free audio power amplifier, or any other component requiring a supply voltage higher than the battery voltage.

The LED current or the desired output voltage can be programmed through two logic signals (MODE0/1). To simplify flash synchronization with the camera module, the device offers a trigger pin (FLASH_SYNC) for fast LED turnon time.

When the TPS6105x is not in use, it can be put into shutdown mode, reducing the input current to 0.3 µA (typical). During shutdown, the LED pin is high impedance to avoid leakage current through the LED.

The TPS6105x device uses a high-frequency synchronous-boost topology with constant current sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current.

The 2-MHz switching frequency allows the use of small and low-profile 2.2-µH inductors. To optimize overall efficiency, the device operates with only a 250-mV LED feedback voltage.

The TPS6105x device not only operates as a regulated current source, but also as a standard voltage-boost regulator. This additional operating mode can be useful to supply other high-power devices in the system, such as a hands-free audio power amplifier, or any other component requiring a supply voltage higher than the battery voltage.

The LED current or the desired output voltage can be programmed through two logic signals (MODE0/1). To simplify flash synchronization with the camera module, the device offers a trigger pin (FLASH_SYNC) for fast LED turnon time.

When the TPS6105x is not in use, it can be put into shutdown mode, reducing the input current to 0.3 µA (typical). During shutdown, the LED pin is high impedance to avoid leakage current through the LED.
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类型 标题 下载最新的英语版本 日期
* 数据表 高功率白光 LED 驱动器 2MHz 同步升压转换器 数据表 (Rev. B) 2015年 9月 11日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日
应用手册 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018年 12月 11日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
应用手册 Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 2017年 11月 29日
应用手册 Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 2017年 6月 15日
应用手册 优化具有内部补偿功能的 DC-DC 转换器的瞬态响应 最新英语版本 (Rev.B) 2008年 7月 15日

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