NCP5269MNTWG

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NCP5269MNTWG, manufactured by On Semiconductor, is a highly integrated high-side N-channel MOSFET driver with differential input and current sense protection. It is designed for high-side control applications such as light emitting diode (LED) drivers, general load switches, and half-bridge applications in high-efficiency switched-mode power supplies. The NCP5269MNTWG operates from a 4.5 to 40 V supply and is capable of a high-side switch current of up to 1.5 A. It can drive N-channel MOSFETs up to 20 nF capacitive load.

The application fields of the NCP5269MNTWG include LED lighting, lighting switches, half-bridge gate drivers, DC/DC power supplies, and power conversion. Furthermore, it is ideal for high-side MOSFET driver applications with high-side current sensing. The NCP5269MNTWG is also suitable for applications in the automotive industry, telecom and datacom, and industrial applications.

The NCP5269MNTWG is a highly integrated, low-power MOSFET driver that combines a differential input and current sense protection. The device features a maximum load current limit of 1.5 A and an adjustable current limit of up to 600 mA. It also contains an overload latch that provides a warning of potential overload conditions. The device provides a Gate voltage OFR (on-state gate resistive) of 5 Ω, an off-state gate resistive of 150 Ω, and a 4-mA gate bias current.

The NCP5269MNTWG offers a variety of features to meet the demands of its application field including: a high level of integration with minimal externals, current sensing and over-current protection, a low-power shutdown mode, adjustable hysteresis, and adjustable turn-on/turn-off delays. It also features an adjustable output delay, adjustable rise and fall times, a highly accurate current limit threshold and an adjustable line compensation, that enables the device to operate reliably with a wide range of power supply conditions. The NCP5269MNTWG is available in a SOIC-8 package with a thermally enhanced body, which ensures reliable operation in applications where high ambient temperatures are encountered.

The working principle of the NCP5269MNTWG is based on its differential inputs, current sensing and over-current protection, low-power shutdown mode, and adjustable hysteresis. The NCP5269MNTWG has two voltage inputs A and B that are referenced to the GND terminal. When A is greater than B, the MOSFET turns on (Vgs = -Vgs(min)), and when A is less than B, the MOSFET turns off (Vgs = 0). A current limit is implemented by sensing the voltage drop across a resistor connected between the LMOSFET’s source and drain. The adjustable hysteresis ensures that the MOSFET stays in the same state until the inputs change by more than a given amount. The current limiting threshold is set by adjusting the external resistor connected to the IFST pin.

The NCP5269MNTWG is also equipped with an Adjustable Turn-On/Turn-Off Delay (ATOD) circuit. The ATOD circuit adjusts the MOSFET turn-on and turn-off delays to prevent damaging spikes on the output load. The device also has a low-power shutdown (SHTD) mode that disables the internal circuitry, reducing the power consumption to less than 1 mW. This mode is triggered by pulling the SHTD pin low. When the SHTD pin is released, the device will resume normal operation.

In conclusion, the NCP5269MNTWG DC–DC switching controller provides a highly integrated solution for the high-side control applications such as LED lighting, lighting switches, half-bridge gate drivers, DC/DC power supplies, and power conversion. It offers a wide range of features, including an adjustable hysteresis, adjustable current limit, adjustable turn-on/turn-off delays and a low-power shutdown mode. It is available in a SOIC-8 package with a thermally enhanced body, enabling reliable operation in applications where high ambient temperatures are encountered.

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