Home Energiemanagement LED-Treiber LED-Hintergrundbeleuchtungstreiber

TPS61042

AKTIV

Aufwärtswandler mit integriertem Schalter, 30 V, 500 mA, in QFN-8 für weiße LED-Anwendungen

Eine neuere Version dieses Produkts ist verfügbar

Ähnliche Funktionalität wie der verglichene Baustein.
NEU TPS923610 AKTIV Synchr. Aufwärts-LED-Treiber mit PWM-gesteuerter Analogdimmung, mit 0,1 %-Verhältnis, 24,5 V, 1,8 A Newer Device with market 1st synchronous boost topology

Produktdetails

Number of channels 1 Vin (min) (V) 1.8 Vin (max) (V) 6 Vout (min) (V) 1.8 Vout (max) (V) 28 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 88 LED current per channel (mA) 50 Peak efficiency (%) 85 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 1 Vin (min) (V) 1.8 Vin (max) (V) 6 Vout (min) (V) 1.8 Vout (max) (V) 28 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 88 LED current per channel (mA) 50 Peak efficiency (%) 85 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
VSON (DRB) 8 9 mm² (3 mm × 3 mm)
  • Current Source With Overvoltage Protection
  • Input Voltage Range: 1.8 V to 6 V
  • Internal 30 V Switch
  • Up to 85% Efficiency
  • Precise Brightness Control Using PWM Signal or
    Analog Signal
  • Switching Frequency: Up to 1 MHz
  • Internal Power MOSFET Switch: 500 mA
  • Operates With Small Output Capacitors Down to 100 nF
  • Disconnects LEDs During Shutdown
  • No Load Quiescent Current: 38 µA Typ
  • Shutdown Current: 0.1 µA Typ
  • Available in a Small 3 mm × 3 mm QFN Package
  • Current Source With Overvoltage Protection
  • Input Voltage Range: 1.8 V to 6 V
  • Internal 30 V Switch
  • Up to 85% Efficiency
  • Precise Brightness Control Using PWM Signal or
    Analog Signal
  • Switching Frequency: Up to 1 MHz
  • Internal Power MOSFET Switch: 500 mA
  • Operates With Small Output Capacitors Down to 100 nF
  • Disconnects LEDs During Shutdown
  • No Load Quiescent Current: 38 µA Typ
  • Shutdown Current: 0.1 µA Typ
  • Available in a Small 3 mm × 3 mm QFN Package

The TPS61042 is a high frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typ). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured where the brightness can be controlled by an analog signal as well, as described in the application information section. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device in case of a high impedance output (e.g. faulty LED).

The TPS61042 is a high frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typ). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured where the brightness can be controlled by an analog signal as well, as described in the application information section. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device in case of a high impedance output (e.g. faulty LED).

Herunterladen Video mit Transkript ansehen Video

Technische Dokumentation

Keine Ergebnisse gefunden. Bitte geben Sie einen anderen Begriff ein und versuchen Sie es erneut.
Alle anzeigen 13
Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt TPS61042 Constant Current LED Driver datasheet (Rev. D) PDF | HTML 03.12.2014
Anwendungshinweis QFN and SON PCB Attachment (Rev. C) PDF | HTML 06.12.2023
Whitepaper Common LED Functions and LED Driver Design Considerations 21.09.2020
Anwendungshinweis Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11.12.2018
Auswahlhilfe Power Management Guide 2018 (Rev. R) 25.06.2018
Anwendungshinweis Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 29.11.2017
Anwendungshinweis Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15.06.2017
Analog Design Journal Design considerations for a resistive feedback divider in a DC/DC converter 26.04.2012
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17.06.2011
Anwendungshinweis White Light LED Driver With Gradual Dimming (Rev. A) 10.01.2007
Anwendungshinweis Single Cell TPS61041 LED Driver 09.06.2003
Whitepaper White LED Power Supply Design Techniques 18.02.2003
Anwendungshinweis High Voltage Power Supply Using the TPS61040 09.07.2002

Design und Entwicklung

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

Evaluierungsplatine

TPS61042EVM-226 — TPS61042 EVM für Konstantstrom-weiße LED-Versorgung mit PWM-Helligkeitssteuerung

The TPS61042EVM-226 is an evaluation tool for the TPS61042 inductive boost converter in 3x3mm2 QFN that can supply voltages up to 28V from input voltages in the range of 1.8V to 6V. The EVM is configured to supply a 20-mA bias current to 4 on-board white LEDs. The EVM can also be used to evaluate (...)

Benutzerhandbuch: PDF
Unterstützte Produkte und Hardware
Vorrätig
Limit:
??asset.out-of-stock-ti_de_DE??
Nicht verfügbar
Referenzdesign

TIDM-CONNECTED-ETHERNET — Angeschlossenes Ethernet, USB und LCD – Referenzdesign

This reference design will demonstrate several Ethernet- and LCD-enabled applications such as remote sensor monitoring, Ethernet configuration via web-based and LCD dashboards and aware applications that interface with weather websites.

Unterstützte Produkte und Hardware
Referenzdesign

TIDM-TM4C129CAMERA — Kamera-Referenzdesign für ARM®-Cortex®-M-Mikrocontroller (MCUs)

Dieses Design implementiert eine Netzwerkkamera mit einem QVGA-Anzeigefeld und einem integrierten Webserver zur Fernüberwachung.  Mit einem Speicherbedarf von 250 kB für den Webserver steht auf dem TM4C129x-Mikrocontroller genügend Speicher für weitere Anpassungen zur Verfügung.

Unterstützte Produkte und Hardware
Referenzdesign

TIDM-TM4C129XSDRAM — SDRAM-Speicherschnittstelle für Hochleistungs-Mikrocontroller

This reference design demonstrates how to implement and interface SDRAM Memory to the performance microcontroller TM4C129XNCZAD. The implementation is made possible by using the EPI Interface of the Microcontroller to interface a 256Mbit SDRAM at 60MHz which allows developers to implement (...)

Unterstützte Produkte und Hardware
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VSON (DRB) 8 Ultra Librarian

Bestellen & Qualität

Empfohlene Produkte können Parameter, Evaluierungsmodule oder Referenzdesigns zu diesem TI-Produkt beinhalten.

Support und Schulungen

TI E2E™-Foren mit technischem Support von TI-Ingenieuren

Inhalte werden ohne Gewähr von TI und der Community bereitgestellt. Sie stellen keine Spezifikationen von TI dar. Siehe Nutzungsbedingungen.

Bei Fragen zu den Themen Qualität, Gehäuse oder Bestellung von TI-Produkten siehe TI-Support. ​​​​​​​​​​​​​​

Videos