Datasheet > TPS38

TPS38

更新时间： 2024-11-21 11:13:43

品牌	Logo	应用领域
德州仪器 - TI		监控
页数	文件大小	规格书
51页	4372K
描述
具有超低静态电流和延时功能的 65V 双通道监控器

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TPS38 数据手册

TPS38

SNVSBJ2 – APRIL 2022

TPS38 Wide V_IN65 V Dual Channel Overvoltage or Undervoltage (OV or UV) Detector

with Programmable Sense and Reset Function

1 Features

3 Description

•

Functional Safety-Capable

The TPS38 is a 65 V input voltage detector with

1 μA I_DD, 1% accuracy, and with a fast 10 μs detection

time. This device can be connected directly to 12

V / 24 V automotive battery system for continuous

monitoring of over (OV) or under (UV) voltage

conditions; with its internal resistor divider, it offers the

smallest total solution size. Wide hysteresis voltage

options are available to ignore cold crank, start-stop

and various car battery voltage transients. Built-in

hysteresis on the SENSE pins prevents false reset

signals when monitoring a supply voltage rail.

– Documentation available to aid functional safety

system design

•

Wide supply voltage range: 2.7 V to 65 V

SENSE and RESET pins are 65 V graded

Low quiescent current: 1 μA (typical)

Flexible and wide voltage threshold options

Table 12-1

– 2.7 V to 36 V (1.5% maximum accuracy)

– 800 mV option (1% maximum accuracy)

Built-in hysteresis (V_HYS)

•

– Percentage options: 2% to 13% (1% steps)

– Fixed options: V_TH< 8 V = 0.5 V, 1 V, 1.5 V,

2 V, 2.5 V

Programmable reset time delay

– 10 nF = 12.8 ms, 10 μF = 12.8 s

Programmable sense time delay

– 10 nF = 1.28 ms, 10 μF = 1.28 s

Manual Reset (MR) feature

Output reset latching feature

Output topology:

– Channel 1: Open-Drain or Push-Pull

– Channel 2: Open-Drain

The separate VDD and SENSE pins allow for

the redundancy sought by high-reliability automotive

systems and SENSE can monitor higher and lower

voltages than VDD. Optional use of external resistors

are supported by the high impedance input of the

SENSE pins. CTSx and CTRx pins allow delay

adjustability on the rising and falling edges of the

RESET signals. Also, CTSx functions as a debouncer

by ignoring voltage glitches on the monitored voltage

rails; CTRx operates as a manual reset (MR) that can

be used to force a system reset.

•

The TPS38 is available in a WSON or SOT-23

package. The central pad is non-conductive to

increase the creepage between VDD and GND per

guidelines in IEC60664. TPS38 operates over –40°C

to +125°C T_A.

2 Applications

•

Gateway

PLC

I/O Module

Servo/AC Motor Control

Factory Automation

Power Tools

Device Information

PART NUMBER

TPS38

PACKAGE ⁽¹⁾

WSON (10) (DSK)

SOT-23 (14) (DYY) ⁽²⁾

BODY SIZE (NOM)

2.5 mm × 2.5 mm

4.1 mm × 1.9 mm

TPS38

(1) For package details, see the mechanical drawing addendum

at the end of the data sheet.

(2) Product Preview

0.95

0.90

0.85

0.80

0.75

0.70

0.65

Typical Application Circuit

Low Iq, No external

resistors needed

DC/DC

Ba ery

MCU

VDD

GPIO

MCU Flag

RESET1

SENSE1

TPS38

0.60

GND

-40^oC

RESET2

SENSE2

25^oC

0.55

0.50

GND

125^oC

Enable

Boost

10 15 20 25 30 35 40 45 50 55 60 65

Supply Voltage (V)

Backup

Vba

Boost

Converter

Typical I_DDvs V_DD

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...51

中文翻译

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