NCP5005SNT1G Integrated Circuits (ICs)

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The NCP5005SNT1G is an integrated white LED driver with current regulation. It is categorized as one of the Power Management Integrated Circuit (PMIC) solutions and is classified specifically as a LED Drivers product. This device provides an easy, cost effective solution to control and regulate the current supplied to the white LED strings. It comes in a compact 8-pin Thin Shrink Small Outline Package (TSSOP) with a small footprint that facilitates easy integration into confined application space.

The NCP5005SNT1G consists of:

• An internal power switch
• Periodic current-regulation error-control loop generator
• Internal feedback regulator
• Voltage feedback reference
• Thermal compensation circuitry

The NCP5005SNT1G can be used for several applications, including backlighting of cellular phones, LCD monitors, lighting dimming, sensing and control, automotive lighting, and home appliance lighting. It can be used in LED backlight designs due to its high accuracy current-regulation parameter, which allows it to maintain a regulated LED current over a wide temperature range. This device also has a low RDS(ON) and low quiescent current characteristic, which makes it the ideal choice for low power and low voltage applications.

The NCP5005SNT1G works by implementing two power switches in a proprietary feedback control configuration. The first switch operates as a linear current regulator and has a low output impedance. The second switch delivers power to the load when the current regulator reaches its set point. The device also has an adaptive and adjustable switching frequency with a programmable maximum limit to avoid interference and reduce EMI. The output current can be programmed with an external precision resistor, and the feedback reference voltage can be adjusted with an external resistor divider.

The monitoring of the NCP5005SNT1G can be done by keeping an eye on its open-drain SYNCout pin, which is an output of the internal voltage error amplifier. The thermal compensation circuit also monitors its temperature and adjusts the regulated current to prevent over-heating. The device also implements a number of safety features such as Under Voltage Lockout (UVLO), a maximum duty cycle limit, a maximum peak current limit, and a thermal shutdown.

In conclusion, the NCP5005SNT1G is a PMIC LED Drivers solution that offers a cost effective and easy solution to control the current supplied to white LED strings. The device has an adaptive and adjustable switching frequency and implements a number of safety features that help ensure the protection of the device and the connected LED strings. Its applications range from LED backlighting for cellular phones, LCD monitors, lighting dimming and control, automotive lighting, and home appliance lighting.

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