전원 관리 LED 드라이버 백라이트 LED 드라이버

TPS61177A

활성

노트북 및 태블릿 디스플레이용 WLED 드라이버

제품 상세 정보

Number of channels 6 Vin (min) (V) 2.5 Vin (max) (V) 24 Vout (min) (V) 4.5 Vout (max) (V) 39 Type Inductive Switching frequency (max) (kHz) 1200 Duty cycle (max) (%) 95 LED current per channel (mA) 30 Peak efficiency (%) 95 Topology Boost Features Analog Dimming, Analog/PWM mixed dimming, CABC, Direct PWM Dimming Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 6 Vin (min) (V) 2.5 Vin (max) (V) 24 Vout (min) (V) 4.5 Vout (max) (V) 39 Type Inductive Switching frequency (max) (kHz) 1200 Duty cycle (max) (%) 95 LED current per channel (mA) 30 Peak efficiency (%) 95 Topology Boost Features Analog Dimming, Analog/PWM mixed dimming, CABC, Direct PWM Dimming Operating temperature range (°C) -40 to 85 Rating Catalog
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • 2.5-V to 24-V Input Voltage Range
  • 39-V Maximum Output Voltage
  • Integrated 1.8-A, 40-V MOSFET
  • 450-kHz to 1.2-MHz Programmable Switching Frequency
  • Adaptive Boost Output to WLED Voltages
  • 100-Hz to 25-kHz Wide Input PWM Dimming Frequency Range
  • 1% Minimum Dimming Duty Cycle
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sinks of 30 mA Maximum
  • 1% (Typical) Current Matching
  • Input PWM Glitch Filter
  • PWM Brightness Interface Control
  • Three Optional Dimming Methods, including Direct PWM Dimming, Analog Dimming, and Analog and PWM Mixed Dimming
  • Built-in WLED Open Protection
  • Thermal Shutdown
  • 2.5-V to 24-V Input Voltage Range
  • 39-V Maximum Output Voltage
  • Integrated 1.8-A, 40-V MOSFET
  • 450-kHz to 1.2-MHz Programmable Switching Frequency
  • Adaptive Boost Output to WLED Voltages
  • 100-Hz to 25-kHz Wide Input PWM Dimming Frequency Range
  • 1% Minimum Dimming Duty Cycle
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sinks of 30 mA Maximum
  • 1% (Typical) Current Matching
  • Input PWM Glitch Filter
  • PWM Brightness Interface Control
  • Three Optional Dimming Methods, including Direct PWM Dimming, Analog Dimming, and Analog and PWM Mixed Dimming
  • Built-in WLED Open Protection
  • Thermal Shutdown

The TPS61177A device provides a highly integrated white LED (WLED) driver solution for notebook LCD backlight. This device has a built-in high-efficiency boost regulator with integrated 1.8-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 72 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61177A supports the analog dimming, analog and PWM dimming, and direct PWM dimming method. During analog dimming mode, each CS current linearly varies depending on the duty cycle information on the PWMB pin. During analog and PWM mixed dimming mode, the input PWM duty cycle information is translated to an analog signal to control the WLED current linearly over 25% to 100% brightness area. The device also allows adding PWM dimming when the analog current is down to 25%. Below 25%, the analog signal translates to PWM duty cycle information to control the on or off of WLED current and averages the WLED current down to 1%. The frequency of adding PWM dimming is same to input PWM frequency on the PWMB pin. While the TPS61177A also supports a direct PWM dimming method, in direct PWM dimming mode the WLED current is turned on or off, synchronized with the input PWM signal.

The TPS61177A device provides a highly integrated white LED (WLED) driver solution for notebook LCD backlight. This device has a built-in high-efficiency boost regulator with integrated 1.8-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 72 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61177A supports the analog dimming, analog and PWM dimming, and direct PWM dimming method. During analog dimming mode, each CS current linearly varies depending on the duty cycle information on the PWMB pin. During analog and PWM mixed dimming mode, the input PWM duty cycle information is translated to an analog signal to control the WLED current linearly over 25% to 100% brightness area. The device also allows adding PWM dimming when the analog current is down to 25%. Below 25%, the analog signal translates to PWM duty cycle information to control the on or off of WLED current and averages the WLED current down to 1%. The frequency of adding PWM dimming is same to input PWM frequency on the PWMB pin. While the TPS61177A also supports a direct PWM dimming method, in direct PWM dimming mode the WLED current is turned on or off, synchronized with the input PWM signal.

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기술 자료

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유형 직함 날짜
* Data sheet TPS61177A WLED Driver for Notebooks With PWM Interface and Mixed Dimming Mode datasheet (Rev. B) PDF | HTML 2017/03/14
White paper Common LED Functions and LED Driver Design Considerations 2020/09/21
User guide Using the TPS61177A Evaluation Board 2015/09/11

설계 및 개발

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평가 보드

TPS61177AEVM — TPS61177A 노트북 애플리케이션용 WLED 드라이버용 평가 모듈

TPS61177AEVM is eval platform for WLED Driver application for Notebooks and tablet PCs with PWM Interface and Mixed Dimming Mode. EVM tool kit includes USB2ANY box for I2C communication to configure/control TPS61177A WLED driver's EEPROM registers such as boost switch freq, LED string current, (...)

사용 설명서: PDF
TI.com에서 구매 불가
평가 모듈(EVM)용 GUI

SLVC649 TPS61177A EVM GUI

지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
백라이트 LED 드라이버
TPS61177A 노트북 및 태블릿 디스플레이용 WLED 드라이버
시뮬레이션 툴

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TI용 PSpice®는 아날로그 회로의 기능을 평가하는 데 사용되는 설계 및 시뮬레이션 환경입니다. 완전한 기능을 갖춘 이 설계 및 시뮬레이션 제품군은 Cadence®의 아날로그 분석 엔진을 사용합니다. 무료로 제공되는 TI용 PSpice에는 아날로그 및 전력 포트폴리오뿐 아니라 아날로그 행동 모델에 이르기까지 업계에서 가장 방대한 모델 라이브러리 중 하나가 포함되어 있습니다.

TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
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VQFN (RGR) 20 Ultra Librarian

주문 및 품질

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  • REACH
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  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
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  • 조립 위치

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