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TPS61195

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8-Kanal-Treiber für 96 weiße LEDs zur LCD-Hintergrundbeleuchtung mit SMBus-Schnittstelle

Produktdetails

Number of channels 8 Vin (min) (V) 4.5 Vin (max) (V) 21 Vout (min) (V) 15 Vout (max) (V) 45 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 8 Vin (min) (V) 4.5 Vin (max) (V) 21 Vout (min) (V) 15 Vout (max) (V) 45 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 (RUY) 28 16 mm² 4 x 4
  • 4.5V to 21V Input Voltage
  • Integrated 2.5A 50V MOSFET
  • 600kHz to 1MHz Programmable Switching Frequency
  • Adaptive Boost Output for Best Efficiency
  • Designed to Use Small L-C Components
  • Internal Loop Compensation
  • Eight Current Sinks of 30mA
  • Support up to Total 96 LEDs
  • 1% Current Matching
  • PWM and SMBus Brightness Interface
  • 8-bits (256 steps) Brightness Level
  • Programmable Over Voltage Threshold
  • Built-in WLED Open/Short Protection
  • Over Thermal Protection
  • 28L 4×4 WQFN
  • APPLICATIONS
    • Notebook/Netbook LCD Display Backlighting

  • 4.5V to 21V Input Voltage
  • Integrated 2.5A 50V MOSFET
  • 600kHz to 1MHz Programmable Switching Frequency
  • Adaptive Boost Output for Best Efficiency
  • Designed to Use Small L-C Components
  • Internal Loop Compensation
  • Eight Current Sinks of 30mA
  • Support up to Total 96 LEDs
  • 1% Current Matching
  • PWM and SMBus Brightness Interface
  • 8-bits (256 steps) Brightness Level
  • Programmable Over Voltage Threshold
  • Built-in WLED Open/Short Protection
  • Over Thermal Protection
  • 28L 4×4 WQFN
  • APPLICATIONS
    • Notebook/Netbook LCD Display Backlighting

The TPS61195 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2.5A/50V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 96 LEDs. Unused sinks are disabled by tying them to ground. The boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The TPS61195 supports multiple brightness dimming methods. During PWM dimming, each IFB pin’s current is turned on/off at the duty cycle and frequency determined by an integrated pulse width modulation (PWM). The frequency of this signal is resistor programmable, while the duty cycle is controlled directly either from an external PWM signal input to the DPWM pin or through the SMBUS interface. Additionally, the SMBUS interface provides some operational reporting data such as if one or more strings have failed or if the IC is over-heating. In direct PWM dimming mode, each IFB current is turned on/off at same duty cycle and frequency as the PWM signal input on the DPWM pin. In analog dimming mode, the input PWM duty cycle information is translated to analog signal to control the WLED current signal linearly over 1% to 100% brightness area.

The TPS61195 integrates over-current and short-circuit protection, soft start and over temperature protection circuit. The device also provides programmable output over-voltage protection, and the threshold is adjusted by external resistor divider combination.

The TPS61195 IC has built-in linear regulator for the IC supply. The device is in a 4×4 mm QFN package.

The TPS61195 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2.5A/50V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 96 LEDs. Unused sinks are disabled by tying them to ground. The boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The TPS61195 supports multiple brightness dimming methods. During PWM dimming, each IFB pin’s current is turned on/off at the duty cycle and frequency determined by an integrated pulse width modulation (PWM). The frequency of this signal is resistor programmable, while the duty cycle is controlled directly either from an external PWM signal input to the DPWM pin or through the SMBUS interface. Additionally, the SMBUS interface provides some operational reporting data such as if one or more strings have failed or if the IC is over-heating. In direct PWM dimming mode, each IFB current is turned on/off at same duty cycle and frequency as the PWM signal input on the DPWM pin. In analog dimming mode, the input PWM duty cycle information is translated to analog signal to control the WLED current signal linearly over 1% to 100% brightness area.

The TPS61195 integrates over-current and short-circuit protection, soft start and over temperature protection circuit. The device also provides programmable output over-voltage protection, and the threshold is adjusted by external resistor divider combination.

The TPS61195 IC has built-in linear regulator for the IC supply. The device is in a 4×4 mm QFN package.

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Technische Dokumentation

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Alle anzeigen 6
Typ Titel Datum
* Data sheet WLED Driver for LCD Backlighting With PWM and SMBus Control Interface datasheet (Rev. A) 20 Aug 2010
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Application note Some Guidelines and Tips for the LED Driver Application 14 Aug 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dez 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide TPS61195EVM-460 Useer's Guide 14 Mai 2010

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

TPS61195EVM-460 — Evaluierungsmodul für den 8-Kanal-Treiber TPS61195 für 96 weiße LEDs zur LCD-Hintergrundbeleuchtung

The TPS61195EVM-460 is a fully assembled and tested circuit for evaluating the TPS61195 Adjustable, 8-Channel White LED Driver IC. If LEDs are not available for connection to the evaluation module, the WLEDEVM-260 board can be ordered.
Benutzerhandbuch: PDF
GUI für Evaluierungsmodul (EVM)

TPS61195EVM-SW TPS61195EVM-SW Software Download

The TPS61195EVM software allows you to control the TPS61195EVM via the SMBus interface. This interface allows the user to:

  • Enable/disable the IC and switch between dimming modes,
  • Control the LED current through the ICs current sink, thereby dimming the attached LEDs and
  • Monitor fault conditions.

(...)

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
LED-Hintergrundbeleuchtungstreiber
TPS61195 8-Kanal-Treiber für 96 weiße LEDs zur LCD-Hintergrundbeleuchtung mit SMBus-Schnittstelle
Hardware-Entwicklung
Evaluierungsplatine
TPS61195EVM-460 Evaluierungsmodul für den 8-Kanal-Treiber TPS61195 für 96 weiße LEDs zur LCD-Hintergrundbeleuchtung
Software
Support-Software
TPS61195EVM-SW TPS61195-Evaluierungsmodul-Software
Simulationstool

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
WQFN (RUY) 28 Ultra Librarian

Bestellen & Qualität

Beinhaltete Information:
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  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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