Driver para display LED STMicroelectronics STLD40D, alim: 3 → 5,5 V., Montaje superficial, QFN 8

STLD40D is a boost converter that operates from 3.0 V to 5.5 V. It can provide an output voltage as high as 37 V and can drive up to 10 white LEDs in series. The converter is a PFM (pulse frequency modulation) inductor switch that can work in discontinuous (DCM) mode operation. A minimum OFF time of the embedded boost switch TSWis fixed internally and allows limiting the switching frequency. The output current capability is 20 mA with an output voltage of 37 V. The regulation is done by sensing the LED current through the resistor RLED. The device can be turned ON/OFF through the logic enable signal pin EN. By applying a low frequency PWM signal the LEDs can be dimmed. The maximum peak inductor current can be programmed by connected a resistor RSETto the pin RSET.

El inductor conmuta el controlador de sobrealimentación
Control de modo PFM
Alta eficiencia en una amplia gama de tensión de entrada de 3,0 V a 5,5 V.
Protección contra sobretensión con rearranque automático
Límite de corriente Peak Ajustable
Habilitar el pasador con posibilidad de control de atenuación PWM
Corriente de parada baja< de 1 μA
Pequeño componente externo
Buena regulación de carga y línea
QFN8 3 x 3 mm
Aplicaciones
Fuente LED blanca para retroiluminación LCD
Teléfono móvil
PDA y organizadores
Cualquier microteléfono alimentado de 3,0 V a 5,5 V