AL5809-90QP1-7

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The AL5809-90QP1-7 is a current mode and adjustable switching frequency power switch from Diodes Incorporated. It is a both cost effective and low power PMIC - LED driver solution targeted for LED backlighting applications. It has a wide input voltage range, a wide operating temperature range, and protection from fault conditions.

The AL5809-90QP1-7 features internal gate driving transistor and controllable switching frequency. It uses an internal reference module of +5V to adjust the LED output current. The minimum external components required to operate the IC are an input voltage capacitor, an LED output series resistor, and an LED diode.

For LED lighting applications, the AL5809-90QP1-7 is particularly useful because of its adjustable switching frequency. This allows it to dim the LEDs at a constant frequency, reducing the flickering of the LED lighting. It also helps make energy savings, by changing the output current of the LED depending on conditions.

The AL5809-90QP1-7 also features wide input voltage range and extended operation temperature range of -20℃ to 125℃, making it suitable for a variety of LED lighting application. For example, it is suitable for lighting for TVs, Monitor, Smart phone, Tablet and LED Bulbs. Moreover, this device offers comprehensive protection when not operated properly, including over-voltage, over-current, open loop, temperature protection and over-power protection.

The AL5809-90QP1-7 operates in step-down mode. It functions by taking an input voltage and providing a steady current to the LED diode. The output voltage can be programmed by setting the switching frequency and current sense resistor. The device is designed to operate in either PWM or linear dimming mode. In PWM dimming mode, the user program the duty ratio of the PWM signal. In linear dimming mode, an analogue signal is used to control the intensity of the LEDs.

To summarise, the AL5809-90QP1-7 is a PMIC - LED driver solution which offers a current mode and adjustable switching frequency control. It has wide input voltage range and extended operating temperature range, and offers comprehensive protection features. This IC is especially useful for LED lighting applications due to its adjustable switching frequency which reduces flicker and makes energy savings.

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