AP1695-20CS7-13

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LED drivers are wiring circuits that control the voltage and current going through an LED usage circuit. A specific LED driver being analyzed is the AP1695-20CS7-13, a linear constant current sink driver coming from Diodes Incorporated. The package is a 16-pin small outline integrated circuit (SOIC) design, featuring four wide body Power PADs for optimal heat dissipation. As a linear LED driver, it is capable of driving up to 10 LEDS in a single string, an unprecedented level of LED integration for Diodes Incorporated.

AP1695-20CS7-13 is designed for a wide operating temperature range and it is suitable for use in a variety of applications such as Commercial LED lighting, Industrial LED lighting, Automotive LED lighting, and Arduino/Raspberry Pi projects. It provides a Constant Current Sink (CCS) output stage that is implemented with a power feedback to enable the system to cope with over-voltage conditions and wide input voltage tolerances. The output current of the AP1695-20CS7-13 can be set through its vendor-defined current setting resistors.

The AP1695-20CS7-13\'s working principle is based around the control of current in LEDs as opposed to the control of voltage which is done in other types of LED drivers. The power circuit of the AP1695-20CS7-13 is designed around a switch-mode power stage which is controlled by a single (primary) control loop. This primary loop controls the peak current level and ensures that it does not exceed its predefined fixed levels by using a closed-loop feedback. The secondary control loop is responsible for output current regulation, which is done by comparing the measured output voltage level (through R sense) with a reference voltage, and driving the PWM adjust pin until they match. The output voltage level is then determined by the current set point set by the current setting resistors.

In conclusion, the AP169-20CS7-13 is a linear constant current sink LED driver from Diodes Incorporated. It is designed as a 16-pin SOIC package and features four wide body Power PADs for optimal heat dissipation. It is suitable for use in a number of applications, including Commercial LED lighting, Industrial LED lighting, Automotive LED lighting, and Arduino/Raspberry Pi projects. The device is designed around a switch-mode power stage which is controlled by two control loops, the primary and secondary control. This is coupled with a power feedback feature to enable the system to cope with over-voltage conditions and wide input voltage tolerances. The output current of the AP1695-20CS7-13 can be set through its pre-defined current setting resistors.

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