Datasheet > LS0502SCD33

LS0502SCD33

更新时间： 2024-09-25 15:19:39

品牌	Logo	应用领域
力特 - LITTELFUSE		/
页数	文件大小	规格书
10页	1806K
描述
The LS0502SCD33 is a complete solution for system with backup storage capacitor or capacitor bank.

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LS0502SCD33 数据手册

Protection IC Datasheet

LS0502SCD33

Super Capacitor Protection IC for Backup Power Applications

RoHS Pb

Description

The LS0502SCD33 is a complete solution for system with backup

storage capacitor or capacitor bank. It integrated input overvoltage,

overcurrent protection circuit, a reverse blocking switch and super

capacitor charging control circuit. It also has built-in cell balance to

provide protection over two cell super capacitor system.

When the main supply is present and above the minimum system

supply voltage, system will draw power from input supply. At the

same time, integrated linear charger charges the storage element at

up to 300 mA current. Once the storage element is charged, the

circuit draws only 2.5 μA of current while it maintains the super

capacitor or other storage element in its ready state. When the main

supply is removed, the integrated reverse blocking switch will block

current flow from system rail to input. The linear charger will be

turned on to provide power to system rail with low resistance path

with up to 2 A current.

Features and Benefits

■ 2.5 V to 5.5 V System Voltage

■ Automatic Main/Backup

Switchover

Integrated cell balancing circuit will keep monitoring the cell voltage

when charging and keep the two cells voltage at same level.

■ 18 V Input Rating with

The LS0502SCD33 is externally programmable for input current

limit, input overvoltage, charge current limit, and charge voltage

limit. It provides a flag signal when input supply is unplugged so

that main system can taking action.LS0502SCD33 is available in

DFN3X3-10 package.

Overvoltage Protection

■ Up to 2 A Discharge Current

■ Programmable 1.1 V to 5.3 V

Cap Voltage Range

■ Programmable Voltage and

CurrentThresholds

■ Programmable Super

■

2 %Threshold Accuracy

Capacitor Charge Current

■ 2.5 μA Ready Quiescent

■ Programmable Input

Current

Overcurrent Protection

■ Small Solution Size

■ DFN Package

Applications

■ Automatic Cell Balancing

■ Handheld Industrial

■ SmartMeter

Equipment

■ Portable Device with

■ Dash Camera

■ IoT

Removable Battery

Functional Block Diagram

Typical Applications

VIN

USB 5 V

VSYS

VCAP

VIN

VSYS

VIN

C_IN

C_SYS

22 μF

GateCtrl

R_PFLTB

50 kΩ

ChargePump

R_{PFB_TOP}

BodyCtrl

−

PFLTB

PFB

IOV

IUV

VCAP

C_{CFB_TOP}

22 pF

R_{CFB_TOP}

Super Capacitor

VMID

CFB

LS0502SCD33

−

ILIMT

ControlLogic

VMID

VREF

R_{PFB_BOT}

R_LIMT

13 kΩ

ICHG

PFB

−

BALEN

GND

R_{CFB_BOT}

R_CHG

12 kΩ

Input OC Set

ILIMIT

−

CFB

CHG

Charge Current Set

Super Capacitor Protection IC

for Backup Power Applications

VREF

ICHG

VCAP-B AL

−

PFLTB

VINFLT

CAPOV

VCOV

GND

BAL

−

Speciﬁcations are subject to change without notice.

Revised: FW.08/08/23

12 3 4 5 6 7...10

中文翻译

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