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Controladores para LED de retroiluminación

LM2796

ACTIVO

Controlador LED blanco de doble pantalla con aumento de capacitor conmutado 3/2 x

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LM2796

ACTIVO
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Detalles del producto

Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 5.5 Type Capacitive Switching frequency (max) (kHz) 675 Duty cycle (max) (%) 100 LED current per channel (mA) 20 Peak efficiency (%) 80 Topology Boost Features Direct PWM Dimming Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 5.5 Type Capacitive Switching frequency (max) (kHz) 675 Duty cycle (max) (%) 100 LED current per channel (mA) 20 Peak efficiency (%) 80 Topology Boost Features Direct PWM Dimming Operating temperature range (°C) -30 to 85 Rating Catalog
DSBGA (YZR) 18 5.5845 mm² (— mm × — mm)
  • Drives up to 7 LEDs with up to 20mA Each
  • LEDs Controlled in 2 Distinct Groups, for Backlighting 2 Displays (Main LCD and Sub-LCD)
  • Excellent Current and Brightness Matching
  • High-Efficiency 3/2x Charge Pump
  • Extended Li-Ion Input: 2.7V to 5.5V
  • PWM Brightness Control: 100Hz - 1kHz
  • 18-bump Thin DSBGA Package: (2.1mm x 2.4mm x 0.6mm)

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  • Drives up to 7 LEDs with up to 20mA Each
  • LEDs Controlled in 2 Distinct Groups, for Backlighting 2 Displays (Main LCD and Sub-LCD)
  • Excellent Current and Brightness Matching
  • High-Efficiency 3/2x Charge Pump
  • Extended Li-Ion Input: 2.7V to 5.5V
  • PWM Brightness Control: 100Hz - 1kHz
  • 18-bump Thin DSBGA Package: (2.1mm x 2.4mm x 0.6mm)

All trademarks are the property of their respective owners.

The LM2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting. It can drive up to 7 LEDs in parallel with up to 20mA through each LED. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED-driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display. The second group (3 LEDs) can be used to backlight a secondary display or to provide other lighting features (keypad LEDs, for example). Brightness of the two groups can be adjusted independently with pulse-width modulated (PWM) digital signals.

The LM2796 works off an extended Li-Ion input voltage range (2.7V to 5.5V). Voltage boost is achieved with a high-efficiency 3/2×-gain charge pump.

The LM2796 is available in TI’s chip-scale 18-bump DSBGA package.

The LM2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting. It can drive up to 7 LEDs in parallel with up to 20mA through each LED. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED-driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display. The second group (3 LEDs) can be used to backlight a secondary display or to provide other lighting features (keypad LEDs, for example). Brightness of the two groups can be adjusted independently with pulse-width modulated (PWM) digital signals.

The LM2796 works off an extended Li-Ion input voltage range (2.7V to 5.5V). Voltage boost is achieved with a high-efficiency 3/2×-gain charge pump.

The LM2796 is available in TI’s chip-scale 18-bump DSBGA package.
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LM2794 ACTIVO Alimentación LED de capacitor conmutado regulado por corriente con control de brillo analógico y PWM This product is a dual-display white LED driver with 3/2x switched capacitor boost drives up to 6 LEDs. LM2794 drives up to 4 LEDs.

Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM2796 Dual-Display White LED Driver with 3/2x Switched Capacitor Boost datasheet (Rev. A) 2/05/2013
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020

Diseño y desarrollo

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YZR) 18 Ultra Librarian
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