Datasheet > LM74704-Q1

LM74704-Q1

更新时间： 2024-11-18 17:15:39

品牌	Logo	应用领域
德州仪器 - TI		控制器二极管
页数	文件大小	规格书
31页	2061K
描述
具有 FET 良好开漏输出的汽车类理想二极管控制器

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中文翻译

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数据手册

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LM74704-Q1 数据手册

LM74703-Q1, LM74704-Q1

SNOSDF7A – MAY 2023 – REVISED DECEMBER 2023

LM74703-Q1, LM74704-Q1 Automotive Ideal Diode Controller With External FET

Health Indication

1 Features

3 Description

•

AEC-Q100 qualified with the following results

– Device temperature grade 1:

–40°C to 125°C ambient operating temperature

range

3.2-V to 65-V input range (3.9-V start up)

–65-V reverse voltage rating

Charge pump for external N-Channel MOSFET

20-mV ANODE to CATHODE pin forward voltage

drop regulation

The LM74703-Q1, LM74704-Q1 is an automotive

AEC Q100 qualified ideal diode controller which

operates in conjunction with an external N-channel

MOSFET as an ideal diode rectifier for low-loss

reverse polarity protection with a 20-mV forward

voltage drop. The wide supply input range of 3.2 V to

65 V allows control of popular DC bus voltages such

as 12-V, 24-V, and 48-V automotive battery systems.

The 3.2-V input voltage support is designed especially

for severe cold crank requirements in automotive

systems. The device can withstand and protect the

loads from negative supply voltages down to –65 V.

•

Enable pin feature

1-µA shutdown current (EN=Low)

80-µA operating quiescent current (EN=High)

2.3-A peak gate turnoff current

FETGOOD output to indicate external MOSFET

health status

Fast response to reverse current blocking:

< 0.75 µs

EMI performance over extended frequency range

(150-kHz to 1-GHz)

The device controls the gate of the MOSFET to

regulate the forward voltage drop at 20 mV. The

regulation scheme enables graceful turn off of the

MOSFET during a reverse current event and provides

zero DC reverse current flow. Fast response (< 0.75

µs) to reverse current blocking makes the device

applicable for systems with output voltage holdup

requirements during ISO7637 pulse testing as well as

power fail and input micro-short conditions. LM74703-

Q1, LM74704-Q1 has FETGOOD output to indicate

external MOSFET drain to source short or open

condition. The device features enable pin (EN). With

the enable pin low, the controller is off and draws

approximately 1-µA of current.

•

Meets automotive ISO7637 transient requirements

with external TVS Diode

8-pin SOT-23 package 2.90 mm × 1.60 mm

2 Applications

•

Automotive ADAS systems - camera

Automotive infotainment systems - digital cluster,

head unit

Body electronics and lighting

Active ORing for redundant power

Device Information

•

PART NUMBER

LM74703-Q1

PACKAGE⁽¹⁾

PACKAGE SIZE⁽²⁾

DDF (SOT-23, 8)

2.90 mm × 1.60 mm

LM74704-Q1

(1) For more information, see Section 12.

(2) The package size (length × width) is a nominal value and

includes pins, where applicable.

VBATT

VBAT_PROT

ANODE

VCAP–

GATE CATHODE

ANODE

VCAP–

GATE CATHODE

LM74704-Q1

V_EXT

MCU

HSS1_EN

LM74703-Q1

FETGOOD

HSS2_EN

HSS3_EN

VCAP+

GPIO

VCAP+

FETGOOD

GND

LM74703-Q1 Typical Application Schematic

LM74704-Q1 Typical Application Schematic

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...31

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LM74722QDRRRQ1	TI	获取价格	具有 200kHz 有源整流和负载突降保护功能的汽车类低 IQ 理想二极管控制器 \| DR
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