Aug 6, 2024 · We are designing for a 55V battery system. I think that TPS48111-Q1 is suitable. However, we need to withstand a reverse battery connection, upto -60VDC. Can I add the
To provide these electronic safeguards, manufacturers typically chose either a diode or transistor for reverse battery protection. The simplest protection against reverse battery protection is a diode in series with the battery, as seen in Figure 1. Figure 1. Diode in Series With Battery
This made reverse polarity protection a crucial building block that is required by all automotive vehicle manufacturers for any battery connected ECU/system. This application note will first address the ISO pulses that are commonly used to replicate the voltage transients that could appear in real applications.
The simplest protection against reverse battery protection is a diode in series with the battery, as seen in Figure 1. Figure 1. Diode in Series With Battery In Figure 1, the diode becomes forward biased and the load’s normal operating current flows through the diode.
Inserting a blocking diode into the circuit is the simplest solution for input reverse voltage protection to implement, as it consists of only one component.
In the case of C1, the protection device allows current to flow back to the supply. In circuit C2, the protection device blocks the current flow. Input reverse voltage protection can be implemented using a simple diode or a MOSFET (with some external control) as the blocking component.
In circuit C2, the protection device blocks the current flow. Input reverse voltage protection can be implemented using a simple diode or a MOSFET (with some external control) as the blocking component. We will take a closer look at these solutions and discuss their advantages and disadvantages from an engineering point of view.
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