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TPS61187

現行

具 PWM 介面和自動相移功能，且適用筆記本電腦的 WLED 驅動器

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產品規格表

TPS61187

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 6 Vin (min) (V) 5 Vin (max) (V) 24 Vout (min) (V) 5 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 94 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 6 Vin (min) (V) 5 Vin (max) (V) 24 Vout (min) (V) 5 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 94 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTJ) 20 16 mm² (4 mm × 4 mm)
  • Input Voltage 4.5 V to 24 V
  • Maximum Output Voltage 38 V
  • Integrated 2-A, 40-V MOSFET
  • Programmable Switching Frequency 300 kHz to 1 MHz
  • Adaptive Boost Output to WLED Voltages
  • Wide PWM Dimming Frequency Range
    • 100 Hz to 50 KHz for Direct PWM Mode
    • 100 Hz to 22 KHz for Frequency Programmable Mode
  • 100:1 Dimming Ratio at 20 kHz
  • 10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sinks of 30 mA Maximum
  • 1.5% (Typical) Current Matching
  • PWM Brightness Interface Control
  • PWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming Method
  • HBM ESD Protection 4 kV
  • Programmable Overvoltage Threshold
  • Built-in WLED Open/Short Protection
  • Thermal Shutdown
  • Input Voltage 4.5 V to 24 V
  • Maximum Output Voltage 38 V
  • Integrated 2-A, 40-V MOSFET
  • Programmable Switching Frequency 300 kHz to 1 MHz
  • Adaptive Boost Output to WLED Voltages
  • Wide PWM Dimming Frequency Range
    • 100 Hz to 50 KHz for Direct PWM Mode
    • 100 Hz to 22 KHz for Frequency Programmable Mode
  • 100:1 Dimming Ratio at 20 kHz
  • 10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sinks of 30 mA Maximum
  • 1.5% (Typical) Current Matching
  • PWM Brightness Interface Control
  • PWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming Method
  • HBM ESD Protection 4 kV
  • Programmable Overvoltage Threshold
  • Built-in WLED Open/Short Protection
  • Thermal Shutdown

The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.

For all available packages, see the orderable addendum at the end of the data sheet.

The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.

For all available packages, see the orderable addendum at the end of the data sheet.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPS61187 White-LED Driver For Notebooks With PWM Interface and Automatic Phase Shift datasheet (Rev. E) PDF | HTML 2016/12/29
白皮書 Common LED Functions and LED Driver Design Considerations 2020/9/21
應用說明 Some Guidelines and Tips for the LED Driver Application 2019/8/14
應用說明 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018/12/11
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25

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TPS61187EVM-528 — TPS61187EVM-528 評估模組

The TPS61183/7EVM-528 evaluation module contains Texas Instruments' either the TPS61183 or TPS61187 IC configured as a WLED power solution providing up to six independently regulated current outputs using a single inductor step-up (boost) converter. The current outputs are ideal for driving a WLED (...)
使用指南: PDF
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