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1 Introduction
The TPS25948EVM eFuse evaluation board allows reference circuit evaluation of the Texas Instruments
TPS25948 eFuse. The TPS25948 device is a 3.5-V to 23-V, 8-A eFuse with integrated 13-mΩ FET with reverse
current protection, overcurrent protection, inrush current protection, adjustable over current transient blanking
timer, and programmable undervoltage and overvoltage protection.
1.1 EVM Features
General TPS25948EVM eFuse evaluation board features include:
•
3.5-V to 23-V (typical) operation
•
1-A to 9-A programmable current limit using onboard jumpers
•
Programmable output voltage slew rate control
•
Programmable transient current blanking timer
•
Programmable current limit
•
Power mux configuration
•
TVS diode for input transient protection
•
Onboard Schottky diode at output prevents negative spike during overcurrent faults
•
LED status for Power Good and fault indication
1.2 EVM Applications
This EVM can be used for the following applications:
•
Smartphone and tablet
•
PC and notebook
•
USB port protection
•
Power MUXing/ORing
•
Adapter and charger input protection
2 Description
The TPS25948EVM eFuse evaluation board has two channels and enables evaluation of TPS259480A and
TPS259482L eFuses from TPS25948 family. Channels 1 and 2 share a common ground plane and provide
option to evaluate power muxing and paralleling capabilities of TPS25948 eFuse. The channels provide
programmable OVLO, ITIMER, dVdt, and ILM settings. The input power is applied at connectors J2 and J12,
while J1 and J11 provide the output connection for channels 1 and 2 respectively. Refer to the schematic in
Figure 3-1
and the EVM test setup in
TVS diodes U2 and U5 provide input protection from transient overvoltages, while Schottky diode D2 and D8
provide output protection for the TPS25948 eFuses in channels 1 and 2 respectively. S1 and S2 allows U1 and
U2 to be RESET or disabled. A supply good (SPLYGD) indicator is provided by D1 and D7.
Table 2-1. TPS25948EVM eFuse Evaluation Board Options and Setting
EVM Function
Channel
CH1
3.5-V to 23-V, 8-A eFuse
CH2
SLVUCK4A – MARCH 2023 – REVISED JULY 2023
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Figure
5-1.
Vin OVLO
Vin UVLO
Threshold
Threshold
Selectable OVLO – 13.8
V, 16.4 V, 21.5 V
Note: Adjust UVLO
10.84 V
resistor divider to keep
UVLO threshold below
OVLO
Selectable OVLO – 13.8
V, 16.4 V, 21.5 V
Note: Adjust UVLO
10.84V
resistor divider to keep
UVLO threshold below
OVLO
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Output Slew Rate,
ITimer
dVdt
Selectable – 170
Selectable – 1.5
us, 1.7 ms, 17
mV/us, 0.5 mV/us,
ms
0.23 mV/us
Selectable – 170
Selectable – 1.5
us, 1.7 ms, 17
mV/us, 0.5 mV/us,
ms
0.23 mV/us
TPS25948EVM Evaluation Module for TPS25948 eFuse
Introduction
Current Limit
Low Setting
Hi Setting
1 A
9 A
1 A
9 A
3
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