TPS25948中文资料德州仪器数据手册PDF规格书

1 Features

• Wide operating input voltage range: 3.5 V to 23 V

– 28-V absolute maximum

– Can be powered from either IN or OUT

• Integrated back-to-back FETs with low Onresistance:

RON = 13 mΩ (typ.)

• Ideal diode operation with true reverse current

blocking (RCB)

– External pin control (RCBCTRL) to disable RCB

and allow bi-directional current flow in steadystate

to support USB OTG operation

• Fast overvoltage protection

– Adjustable overvoltage lockout (OVLO) with 1-

μs (typ.) response time

• Overcurrent protection with load current monitor

output (ILM)

– Active current limit response

– Adjustable threshold (ILIM) 1 A–9 A

• ±10 accuracy for ILIM > 2 A

– Adjustable transient blanking timer (ITIMER) to

allow peak currents > ILIM

– Output load current monitor accuracy: ±6

(IOUT ≥ 3 A)

• Fast-trip response for short-circuit protection

– < 1-μs (typ.) response time

– Adjustable and fixed thresholds

• Active high enable input with adjustable

undervoltage lockout threshold (UVLO)

• Adjustable output slew rate control (dVdt)

• Overtemperature protection

• Digital outputs: Supply Good (SPLYGD/SPLYGD)

and fault indication (FLT)

• UL 2367 recognition (planned)

• IEC 62368-1 CB certification (planned)

• Small footprint: PowerWCSP 2.4 mm × 1.7 mm,

0.5-mm pitch.

2 Applications

• Adapter and charger input protection

• USB PD protection: smartphone, tablet, PC,

notebook, monitor, dock

• Server motherboard, add-on cards

• Enterprise storage: HBA, SAN, and eSSD

• Power MUXing and ORing

3 Description

The TPS25948xx family of eFuses is a highly

integrated, circuit-protection and power-management

solution in a small package. The devices provide

multiple protection modes that use few external

components and are a robust defense against

overloads, short-circuits, voltage surges, reverse

polarity, and excessive inrush current. With integrated

back-to-back FETs, reverse current flow from output

to input is blocked at all times, making the devices

well suited for power MUX and ORing applications, as

well as systems that need load side energy hold up

storage if input power supply fails. The devices use a

linear ORing based scheme to ensure almost zero DC

reverse current and emulate ideal diode behavior with

minimum forward voltage drop and power dissipation.

The devices also provide an external pin control

option to disable the reverse current blocking and

allow bi-directional current flow in steady-state.

Output slew rate and inrush current can be adjusted

using a single external capacitor. Loads are protected

from input overvoltage conditions by cutting off the

output if input exceeds an adjustable overvoltage

threshold. The devices respond to output overload by

actively limiting the current. The output current limit

threshold as well as the transient overcurrent blanking

timer are user adjustable. The current limit control pin

also functions as an analog load current monitor.

The devices are available in a 2.4-mm × 1.7-mm, 12-

ball power wafer chip scale package (PowerWCSP)

for improved thermal performance and reduced

system footprint.

The devices are characterized for operation over a

junction temperature range of –40°C to +125°C.