Datasheet > LM74700QDDFRQ1

LM74700QDDFRQ1

更新时间： 2024-10-02 02:51:39

品牌	Logo	应用领域
德州仪器 - TI		电池
页数	文件大小	规格书
36页	3196K
描述
LM74700-Q1 Low IQ Reverse Battery Protection Ideal Diode Controller

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LM74700QDDFRQ1 数据手册

LM74700-Q1

_{SNOSD17G – OCTOBER 2017 – REVISED D}L_EM_CE7_M4_B7_E0_R0₂-Q₀₂1₀

SNOSD17G – OCTOBER 2017 – REVISED DECEMBER 2020

www.ti.com

LM74700-Q1 Low I_QReverse Battery Protection Ideal Diode Controller

1 Features

3 Description

•

AEC-Q100 qualified with the following results

– Device temperature grade 1:

–40°C to +125°C ambient operating

temperature range

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

Functional Safety-Capable

– Documentation available to aid functional safety

system design

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

–65-V reverse voltage rating

The LM74700-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 many popular DC bus voltages such as 12-V, 24-V

and 48-V automotive battery systems. The 3.2-V input

voltage support is particularly well suited for severe

cold crank requirements in automotive systems. The

device can withstand and protect the loads from

negative supply voltages down to –65 V.

•

Charge pump for external N-Channel MOSFET

20-mV ANODE to CATHODE forward voltage drop

regulation

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 ensures

zero DC reverse current flow. Fast response (< 0.75

µs) to Reverse Current Blocking makes the device

suitable for systems with output voltage holdup

requirements during ISO7637 pulse testing as well as

power fail and input micro-short conditions.

•

Enable pin feature

1-µA shutdown current (EN=Low)

80-µA operating quiescent current (EN=High)

2.3-A peak gate turnoff current

Fast response to reverse current blocking:

< 0.75 µs

•

Meets automotive ISO7637 transient requirements

with a suitable TVS Diode

Available in 6-pin and 8-pin SOT-23 Package 2.90

mm × 1.60 mm

The LM74700-Q1 controller provides a charge pump

gate drive for an external N-channel MOSFET. The

high voltage rating of LM74700-Q1 helps to simplify

the system designs for automotive ISO7637

protection. With the enable pin low, the controller is off

and draws approximately 1 µA of current.

2 Applications

•

Automotive ADAS systems - camera

Automotive infotainment systems - digital cluster,

head unit

Industrial factory automation - PLC

Enterprise power supplies

Device Information ⁽¹⁾

PART NUMBER

PACKAGE

SOT-23 (6)

SOT-23 (8)

BODY SIZE (NOM)

2.90 mm × 1.60 mm

LM74700-Q1

•

LM74700-Q1

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Active ORing for redundant power

V_OUT

V_BATT

TVS

V_OUT

V_GATE

V_BATT

Voltage

Regulator

GATE CATHODE

LM74700

ANODE

VCAP

I_BATT

GND

ON OFF

Typical Application Schematic

Reverse Current Blocking During Input Short

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

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intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

Product Folder Links: LM74700-Q1

DATA.

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与LM74700QDDFRQ1相关器件

型号	品牌	获取价格	描述	数据表
LM74700QDRQ1	TI	获取价格	3.2V 至 70V、80µA 汽车级反向电池保护理想二极管控制器 \| D \| 8 \| -
LM74701-Q1	TI	获取价格	具有集成 VDS 钳位的汽车类 3.2V 至 65V 电池反向保护理想二极管控制器
LM74701QDDFRQ1	TI	获取价格	具有集成 VDS 钳位的汽车类 3.2V 至 65V 电池反向保护理想二极管控制器 \| D
LM74703-Q1	TI	获取价格	具有 FET 良好输出的汽车类理想二极管控制器
LM74704-Q1	TI	获取价格	具有 FET 良好开漏输出的汽车类理想二极管控制器
LM74720-Q1	TI	获取价格	具有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
LM74720QDRRRQ1	TI	获取价格	具有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 \| DRR \| 12 \|
LM74721-Q1	TI	获取价格	具有有源整流功能的汽车类无 TVS、低 IQ 反向电池保护理想二极管控制器
LM74721QDRRRQ1	TI	获取价格	具有有源整流功能的汽车类无 TVS、低 IQ 反向电池保护理想二极管控制器 \| DRR \|
LM74722-Q1	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

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