Overvoltage protections (OVP)
• Ping overvoltage protection (POVP)
– Protects the device against excessive rectifier voltage (VRECT) during the ping phase (first few
milliseconds after the power-up)
– The threshold is set to 14 V and is released as soon as the rectifier voltage drops below 11 V.
– Gets disabled after the digital part of the device is powered up (the internal 2.5 V LDO reaches the
target value).
– When triggered, AC1 and AC2 pins of the device are shorted to ground
– Cannot be disabled, and the threshold cannot be adjusted
• Soft overvoltage protection (SOVP)
– Connects external resistors between the VRECT node and ground. This causes the VRECT voltage
to drop, without dropping low enough to lose communication with the transmitter.
– Can be disabled in the GUI
– Can be configured to disable VOUT when triggered
– Can also be configured to force the receiver to send EPT packet when triggered
• Hard overvoltage protection (HOVP)
– Shorts AC1 and AC2 pins to ground when triggered
– Can be disabled in the GUI
– This protection can be configured to disable VOUT when triggered
– The threshold of this protection can be set from 6 to 18 V with a 2 V step
• Firmware OVP
– This protection can be configured to disable VOUT when triggered
– The protection can also be configured to force the receiver to send EPT packet when triggered
– The threshold of this protection can be set in range of 0 to 18 V
Undervoltage protections (UVLO)
• Input voltage loop (IVL)
– It monitors the VRECT voltage and automatically reduces the device's output to maintain VRECT at
the set threshold.
– The threshold can be set from 3 to 10.5 V with a 0.5 V step. The default value is 4 V.
• RX UVLO
– It monitors VRECT voltage and disables the device’s output when VRECT drops below a set
threshold.
– It can be configured to disable VOUT when VRECT drops below a set threshold.
– Can also be configured to force the receiver to send EPT packet when triggered
– The threshold can be set from 3 to 10.5 V with a 0.5 V step
– Disabled by default
Overcurrent protections (OCP)
• Hardware OCP
– Monitors the output current
– Can be configured to disable VOUT when triggered
– Can also be configured to force the receiver to send EPT packet when triggered
– The threshold can be set to either 1.25, 1.5, 1.75 or 1.93 A
• Firmware OCP
– Monitors the output current
– Can be configured to disable VOUT when triggered
– Can also be configured to force the receiver to send EPT packet when triggered
– The treshold can be set from 0 to 1.93 A with 1 mA step
Overtemperature protections (OVTP)
UM3154
Protections overview
UM3154 - Rev 2
page 17/81
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