DRF1202

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

DRF1202 Application Field and Working Principle

The DRF1202 are low on-resistance power distribution switches and load drivers, which are able to activate and deactivate power circuits or drivers, typically in automotive applications.

Main Features

• Very low on-resistances R <0.65 mOhm
• Low voltage operation (VDC=8V) and feeding voltage up to 45V
• Very low power dissipation
• Simple control using logic signals
• Diagnostic information available
• High temperature capability
• EMC and HBM ESD compliant

Application Field

The DRF1202 is applied mainly to automotive systems that require external power distribution and provide devices that have multiple power domains to be activated and deactivated. The integrated power MOSFET functionality inside the chip reduces the devices down to a few components, making external components unnecessary. The DRF1202 is capable of operating in temperatures of up to 125 °C in the automotive application field.

Working Principle

The DRF1202 is used to control power paths in the system, activating and deactivating power sources as required. It does this using the integrated MOSFET technology that is built into the device. The integrated MOSFETs are P-channel in the positive rail and N-channel in the negative rail, and are controlled by three logic lines. The MOSFETs in the positive and negative rails are controlled by the two logic lines, and the third logic line is used to control the integrated pull-down circuit to activate the power gates.

The integrated pull-down circuit consists of a PNP control transistor, two resistors and two rows of the MOSFETs. The power source is connected in series to the PNP control transistor, the two resistors and the MOSFETs. When the DRF1202 is active, the power will flow through the series of components, activating the MOSFETs. When deactivated, the power will be cut off and the MOSFETs will be turned off. The on-resistance of the MOSFETs is typically in the range of 0.3 mOhm to 0.7 mOhm.

The DRF1202 also includes locking and diagnostic functions which are accessible via the integrated registers. One of the registers can be used to lock in the MOSFETs when a high temperature is detected, preventing damage to the device and the system. The diagnostic register can be used to monitor the temperature of the device, self-protection status and external voltage levels. This is useful for system diagnosis in threaded systems.

Conclusion

The DRF1202 is a low on-resistance power distribution switch and load driver, suitable for automotive applications. It features a low voltage operation VDC=8V and a high temperature capability up to 125 °C. The integrated MOSFET technology provides efficient power control and the integrated pull-down circuit engages the power gates when activated. The DRF1202 also has several diagnostic and locking functions available.

The specific data is subject to PDF, and the above content is for reference