GUI para el módulo de evaluación (EVM)
LM36923H
Controlador LED blanco de tres cadenas de alta eficiencia
Hoja de datos
LM36923H
- 1% Matched Current Sinks Across Process, Voltage, Temperature
- 3% Current-Sink Accuracy Across Process, Voltage, Temperature
- 11-Bit Dimming Resolution
- Up to 90% Solution Efficiency
- Drives from One to Three Parallel LED Strings at up to 38 V at 25 mA per String
- PWM Dimming Input
- I2C Programmable
- Selectable 500-kHz and 1-MHz Switching Frequency With Optional –12% shift
- Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
- Four Configurable Overvoltage Protection Thresholds (17 V, 24 V, 31 V, 38 V)
- Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA,
1500 mA) - Thermal Shutdown Protection
- Externally Selectable I2C Address Options via ASEL Input
The LM36923H is an ultra-compact, highly efficient, three-string white-LED driver designed for LCD display backlighting. The device can power up to 12 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies with noise-free operation from 50 µA to 25 mA.
Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.
The device operates over the 2.5-V to 5.5-V input voltage range and a –40°C to +85°C temperature range.
For all available packages, see the orderable addendum at the end of the data sheet.Documentación técnica
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Ver todo 5 | Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | LM36923H Highly Efficient Triple-String White LED Driver datasheet (Rev. B) | 07 oct 2016 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 sep 2020 | ||
| Application note | Analog PWM Dimming in White-LED Drivers | 21 dic 2016 | ||
| Application note | Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight | 14 oct 2016 | ||
| EVM User's guide | Using the LM36923HEVM Evaluation Module | 18 ene 2016 |
Diseño y desarrollo
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
Placa de evaluación
LM36922EVM — Módulo de evaluación de controlador LED blanco de dos cadenas de alta eficiencia LM36922
The LM36922 Evaluation Module (LM36922EVM) is designed to fully evaluate the LM36922 Highly Efficient Dual-String White LED backlight driver. The LM36922EVM consists of the LM36922 with 2p8s white LED strings with jumpers to enable 1p2s through 2p8s led string configurations. LED string (...)
Guía del usuario: PDF
Placa de evaluación
LM36923HEVM — Módulo de evaluación de controlador LED blanco de tres cadenas de alta eficiencia LM36923H
The LM36923H evaluation module (LM36923HEVM) is designed to fully evaluate the LM36923H highly efficient triple-string white LED backlight driver. The LM36923HEVM consists of the LM36923H with three strings of 13 white LEDs. Configuration jumpers proivide a wide range of LED string (...)
Guía del usuario: PDF
Herramienta de simulación
PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Paquete | Pasadores | Descargar |
|---|---|---|
| DSBGA (YFF) | 12 | Ver opciones |
Pedidos y calidad
Información incluida:
- RoHS
- REACH
- Marcado del dispositivo
- Acabado de plomo/material de la bola
- Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
- Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
- Contenido del material
- Resumen de calificaciones
- Monitoreo continuo de confiabilidad
Información incluida:
- Lugar de fabricación
- Lugar de ensamblaje
Soporte y capacitación
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