Description:The ISL9237 is a buck-boost Narrow Output Voltage DC (NVDC) charger utilizing Intersil’s advanced R3™ Technology to provide high light-load efficiency, fast transient response and seamless DCM/CCM transitions for a variety of mobile and industrial applications. In Charge mode, the ISL9237 takes input power from a wide range of DC power sources (conventional AC/DC charger adapters, USB PD ports, travel adapters, etc. ) and safely charges battery packs with up to 3 cells in a series configuration. ISL9237 sup
The recommended PCB layout for the ISL9237HRZ-T involves keeping the power traces short and wide, using a solid ground plane, and placing the input and output capacitors close to the device. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane to minimize noise and EMI.
The selection of external components for the ISL9237HRZ-T depends on the specific application requirements, such as the input voltage, output voltage, and output current. Renesas provides a component selection guide in the datasheet, which can be used as a starting point. Additionally, online tools such as the Renesas PowerNavigator software can be used to simulate and optimize the design.
The ISL9237HRZ-T has a thermal shutdown feature that turns off the device when the junction temperature exceeds 150°C. To ensure the device doesn't overheat, it's recommended to provide adequate airflow, use a heat sink if necessary, and follow the recommended PCB layout guidelines. Additionally, the device's power dissipation can be estimated using the datasheet's thermal characteristics and the application's specific requirements.
The ISL9237HRZ-T has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor and capacitor network. The datasheet provides a detailed description of the overcurrent protection circuit and the calculation of the OCP threshold voltage. Additionally, the device's overcurrent protection can be adjusted using external resistors and capacitors.
The recommended start-up sequence for the ISL9237HRZ-T involves applying the input voltage, followed by the enable signal. The device has a built-in soft-start feature that ramps up the output voltage to prevent inrush currents. To ensure a smooth power-up, it's recommended to follow the datasheet's guidelines for the enable signal timing and the output capacitor selection.
Trust Checks
This model has been built in collaboration with the manufacturer.
Manufacturer Collaborated
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
ISL9237HRZ-T Overview
Use the download button to access the ISL9237HRZ-T schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like ISL92,
or try a keyword search, such as Power Management Circuits
