About Uvlo lithium battery pack
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About Uvlo lithium battery pack video introduction
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6 FAQs about [Uvlo lithium battery pack]
What does UVLO stand for?
Understanding Undervoltage Lockout in Power Devices (Rev. A) Many integrated circuits include an undervoltage lockout (UVLO) function to disable the device at low supply voltages. Below the minimum supply voltage the function and performance of a device may be undefined, making it impossible to predict system behavior.
What is an Undervoltage lockout (UVLO) function?
An undervoltage lockout (UVLO) function makes sure that a device does nothing until the supply voltage is high enough for predictable behavior, giving rise to robust system performance. Figure 1. Operating Modes When the supply voltage is below the UVLO threshold, the device is off (shown by the red regions).
What is the UVLO function in power devices?
The UVLO function in power devices is a useful feature that enables robust system behavior across a wide range of operating conditions. When using a device, take care to familiarize yourself with its UVLO characteristics and understand what they mean for your application.
What happens if the supply voltage is below the UVLO threshold?
When the supply voltage is below the UVLO threshold, the device is off (shown by the red regions). All the internal blocks except the UVLO circuit itself are disabled. The input supply current when the device is off is typically very small.
What happens if a UVLO circuit does not have hysteresis?
UVLO circuits are typically designed to include some hysteresis. When a device switches on, the current it draws can cause the supply voltage to drop. Without hysteresis, that voltage drop would immediately turn the device off again.
What are the recommended operating conditions for a UVLO function?
Recommended Operating Conditions A well-specified UVLO function should have minimum and maximum values for the rising and falling thresholds and the hysteresis (see Table 2). These values should be valid for the entire operating temperature range of the device.