UCC5640PW24G4

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The UCC5640PW24G4 is a part of Texas Instruments’ line of interface and signal terminators. This device is a low-cost, open-drain inverting charge pump with high-current, N-channel MOSFETs designed to drive higher LED current levels in LED strings, as well as enable power conversions and level shifting in portable, automotive and home electronics applications.

The UCC5640PW24G4 product is designed to reduce the complexity, cost, and size of low-voltage LED lighting solutions requiring high switching and current levels in applications such as LCD backlighting, automotive and industrial lighting, portable display backlighting, plasma backlights, flash lighting for digital cameras, etc. This device can also be used for other power conversion applications such as controlling relays, implementing level shifting, and driving low-side switches.

The UCC5640PW24G4 utilizes a two-stage charge pump architecture to increase the output from a low-voltage input supply. The first stage is a fast charge pump to rapidly drive the gate voltage of an N-channel MOSFET, and the second stage is a high-current switch for driving the LED string. The device utilizes logic compatible PWM and enable input signals to quickly and precisely control the switching of the gate voltage. This ensures peak efficiency during operation and reduces EMI and power losses.

The UCC5640PW24G4 provides protection against short circuits, undervoltage/overvoltage protection, input enable, and temperature protection. The device also features a collision detection output pin that can be used to detect impending collisions between the MOSFET and the LED string. This collision detection feature makes the device ideal for protecting LED strings from overcurrent conditions.

The device enables designers to implement a complete charge pump solution in a single package, reducing the total system cost, complexity, and size. The device is offered in a small, 24-pin package and is fully AEC-Q100-qualified for automotive applications. The UCC5640PW24G4 has an operating temperature range from -40 °C to 125 °C and can handle up to 50V reverse voltage.

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