ADM00865

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The ADM00865 is an evaluation board designed primarily for power management. It is a power MOSFET gate driver which is mainly used to control high power devices such as MOSFETs, IGBTs, and SCRs.

The ADM00865 provides two inputs to gate drive up to two high voltage high power devices. It features 7.5A peak source and sink current capability, an adjustable slew rate and an adjustable output voltage trigger ramp. It is also capable of providing high-side and low-side gate drive power to support toplogy such as bridge half, synchronized rectifier, etc.

The board is typically used in DC/DC and AC/DC (off-line) SMPS applications for driving MOSFETs and IGBTs. It is designed for DC and AC powers sources from 14V to 48V and is capable of up to 95A peak load. It features adjustable pulse frequency ranging from 50Hz to 10kHz, adjustable pre-driver resistor, dead-time adjustment and adjustable output voltage.

The ADM00865 is suitable for applications such as solar energy systems, motor and lighting controls, electric vehicle, solar inverter, DC/AC inverter, motor drives and other power management applications. It provides a cost-effective solution to drive high voltage devices for high power systems.

In terms of working principle, the ADM00865 board uses a pulse-frequency modulation (PFM) technique to adjust the output voltage. The board is designed with a dual channel differential amplifier that controls two pre-driver circuits. The pre-driver circuits, in turn, feed two drivers with logic-level and high-current signals. The logic-level signal is used to control the state of the power switch while the high-current signal is used to energize the power switch.

The board also features a voltage detection circuit, which senses the switching voltage and triggers the gate drive signals. This helps to keep the output voltage in regulation over a wide range of input voltage and load current. The board is capable of driving up to two channels of high voltage high power switches, and can also help to ensure greater efficiency and longer life of the connected devices.

In summary, the ADM00865 evaluation board is designed for DC/DC and AC/DC (off-line) SMPS 24V to 48V applications. It features 7.5A peak source and sink current capability, adjustable slew rate, adjustable pulse frequency, adjustable pre-driver resistor, voltage detection circuit and adjustable output voltage. It provides a cost-effective solution for driving high voltage devices for high power systems.

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