TBD62003AFG,EL

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TBD62002AFG and TBD62003AFG can be classified into PMIC - Power Distribution Switches, Load Drivers. These two devices have different application fields, but they share the same working principle.

TBD62002AFG:

TBD62002AFG is a two-channel driver for LED/ LED displays, providing cost-effective solutions for white LED backlight and LED display applications. It supports up to 2 Amps of load current, with a maximum voltage rating of 40V. Moreover, the device has over-current, over voltage, and over temperature protections.

The TBD62002AFG has a standby current of 1.1 μA, which is suitable for battery costs, and it also supports PWM dimming. The application field of this device includes mobile/ handheld devices, such as smart phones, tablets, LCD displays and gaming consoles.

TBD62003AFG:

TBD62003AFG is a 3-channel driver that provides a cost-effective solution for panel backlighting. It supports up to 3.5 Amps of load current, with a maximum voltage rating of 24 V. It also has over-current, over-voltage, and over-temperature protection functions. Besides, the standby current of TBD62003AFG is only 0.85μA.

The primary application of this device is for notebook Panel backlight and automotive displays. It is designed for LCD/ LED backlight sources and LED displays.

Working principle:

Both devices use buck topology to enable voltage conversion. In buck topology, the output voltage is lower than the input voltage. The TBD62002AFG and TBD62003AFG contain an internal N-MOSFET and P-MOSFET, which control the power switches for setting up the current flow. The bottom side of the internal mosfets is connected to the output of the device. The voltage applied on the gate of the output P-channel mosfet determines the output current of the device.

The output current of the device can also be adjusted by varying the gate voltage of bottom N-channel mosfet. Both TBD62002AFG and TBD62003AFG are capable of providing an output current up to 2A and 3.5A respectively. They also support PWM and are able to adjust the brightness of the LEDs according to input voltage levels.

The devices also implement several safety functions such as over-current, over-voltage, and over-temperature safeguards. The over-current protection in the devices monitors the current flowing in the device and shuts off the device if the current exceeds the set threshold.

Overall, TBD62002AFG and TBD62003AFG are suitable for LED/ LED display applications. Both the devices have a wide range of applications in the market, due to their cost-effectiveness and over-current, over-temperature, and over-voltage protection features.

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