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TPS61141

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1,2-MHz-Aufwärtswandler mit 2x 27 V, 700-mA-Schalter – weißer LED- und OLED-Treiber mit einem Indukt

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TPS61141

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Produktdetails

Number of channels 2 Vin (min) (V) 3 Vin (max) (V) 6 Vout (min) (V) 2.5 Vout (max) (V) 27 Type Inductive Switching frequency (max) (kHz) 1200 Duty cycle (max) (%) 93 LED current per channel (mA) 23 Peak efficiency (%) 85 Topology Boost Features Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 3 Vin (max) (V) 6 Vout (min) (V) 2.5 Vout (max) (V) 27 Type Inductive Switching frequency (max) (kHz) 1200 Duty cycle (max) (%) 93 LED current per channel (mA) 23 Peak efficiency (%) 85 Topology Boost Features Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • 2.5-V to 6-V Input Voltage Range
  • Two Outputs Each up to 27 V
  • 0.7-A Integrated Switch
  • Built-In Power Diode
  • 1.2-MHz PWM for WLED Driver
  • PFM for OLED Supply
  • Individually Programmable Output
  • Input to Output Isolation
  • Short-Circuit Protection
  • Built-In Soft Start
  • Overvoltage Protection
  • Up to 82% Efficiency
  • Up to 30 kHz PWM Dimming Frequency
  • Available in a 10 Pin, 3 × 3 mm QFN Package
  • APPLICATIONS
    • Clamshell Phone With OLED/LCD Screen
  • 2.5-V to 6-V Input Voltage Range
  • Two Outputs Each up to 27 V
  • 0.7-A Integrated Switch
  • Built-In Power Diode
  • 1.2-MHz PWM for WLED Driver
  • PFM for OLED Supply
  • Individually Programmable Output
  • Input to Output Isolation
  • Short-Circuit Protection
  • Built-In Soft Start
  • Overvoltage Protection
  • Up to 82% Efficiency
  • Up to 30 kHz PWM Dimming Frequency
  • Available in a 10 Pin, 3 × 3 mm QFN Package
  • APPLICATIONS
    • Clamshell Phone With OLED/LCD Screen

The TPS61140/1 is a dual output boost converter IC. It is intended to be configured as a highly integrated power solution providing regulated voltage and current output with one boost converter. This device is ideal for driving the OLED sub display and WLED backlight for the LCD main display in clam shell phones. The voltage and current can be individually programmed through external resistors. There is a dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. When only the voltage output is enabled, the boost converter is controlled by pulse frequency modulation (PFM) in order to achieve high efficiency over a wide load range. If the current output is selected, the device adopts a 1.2-MHz pulse width modulation control (PWM) method in order to maximize output current. Applying an external PWM signal to the select pin (SELI) reduces the output current thereby allowing WLED dimming.

The TPS61140/1 has a built-in power MOSFET and power diode; thereby, eliminating the needs for any external active power components. In addition, the high switching frequency reduces the external inductor and capacitor sizes. Overall, the IC provides a highly compact solution with high efficiency and plenty of flexibility.

The TPS61140/1 is a dual output boost converter IC. It is intended to be configured as a highly integrated power solution providing regulated voltage and current output with one boost converter. This device is ideal for driving the OLED sub display and WLED backlight for the LCD main display in clam shell phones. The voltage and current can be individually programmed through external resistors. There is a dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. When only the voltage output is enabled, the boost converter is controlled by pulse frequency modulation (PFM) in order to achieve high efficiency over a wide load range. If the current output is selected, the device adopts a 1.2-MHz pulse width modulation control (PWM) method in order to maximize output current. Applying an external PWM signal to the select pin (SELI) reduces the output current thereby allowing WLED dimming.

The TPS61140/1 has a built-in power MOSFET and power diode; thereby, eliminating the needs for any external active power components. In addition, the high switching frequency reduces the external inductor and capacitor sizes. Overall, the IC provides a highly compact solution with high efficiency and plenty of flexibility.

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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt Dual Output Boost Regulator Using SIngle Inductor datasheet (Rev. B) 22.03.2007
Whitepaper Common LED Functions and LED Driver Design Considerations 21.09.2020
Anwendungshinweis Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11.12.2018
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 IQ: What it is, what it isn’t, and how to use it 17.06.2011
Anwendungshinweis Minimizing Ringing at the Switch Node of a Boost Converter 15.09.2006

Design und Entwicklung

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

Evaluierungsplatine

TPS61140EVM-157 — TPS61140EVM-Evaluierungsmodul

The TPS61140EVM-157 is an evaluation tool for the TPS6114x family. This is a dual channel, single Inductor Boost Converter which is ideal for driving the OLED sub-display and white LED backlight for the LCD main display in clam shell phones.

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