EHP2601|OV/OC Protection IC and Li+ Charger Front-End Protection IC with LDO Mode Current

EHP2601|OV/OC Protection IC and Li+ Charger Front-End Protection IC with LDO Mode Current

規格書下載


OV/OC Protection IC and Li+ Charger

​​ Front-End Protection IC with LDO Mode ​​ Current

​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 

EHP2601

General Description

The​​ EHP2601 is a charger front-end integrated circuit​​ designed ​​ to provide ​​ protection ​​ to ​​ Li-ion ​​ batteries ​​ from failures of charging circuitry. The device monitors the input voltage, battery voltage and the charging current to make sure all three parameters are operated in normal range. The device will switch off internal MOSFET to disconnect IN to OUT ​​ to ​​ protect ​​ load ​​ when ​​ any ​​ of ​​ input ​​ voltage, ​​ output current  ​​​​ exceeds  ​​​​ the  ​​​​ threshold.  ​​​​ The  ​​​​ Over  ​​​​ temperature protection ​​ (OTP) ​​ function ​​ monitors ​​ chip ​​ temperature ​​ to protect the device. The​​ EHP2601​​ also can protect the system’s battery from being over charged by monitors the battery voltage ​​ continuously. ​​ The ​​ device ​​ operates ​​ like ​​ a ​​ linear regulator, maintaining a 5.1V output with input voltages up to the input over-voltage threshold.​​ 

The​​ EHP2601​​ is available in DFN-2x2-8L package. Standard products are Pb-free and Halogen-free.

 

Features

Maximum Input Voltage: 24V

Programmable OCP: Up to 1.5A

Input OVP: 6.8V

OVP Response Time: Less Than 1us

Battery OVP threshold: 4.35V (Typ.)

Over Temperature Protection

Soft-Start to Prevent Inrush Currents

LDO Mode Output: 5.1V

Fault Indication Output

Enable Input

High Immunity of False Triggering Under Transient

Thermal Enhanced DFN Package

RoHS Compliant and Halogen Free

 

Applications

GPS

MID

Car DVR

Digital Video

 

Typical Application Circuit

E-CMOS​​ Corp.​​ (www.ecmos.com.tw) ​​ 2​​ /​​ 100I15N-Rev.F001​​ 

OV/OC Protection IC and Li+ Charger

​​ Front-End Protection IC with LDO Mode ​​ Current

​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 

EHP2601

Pin​​ Assignment

 

 

 

 

 

 

 

 

 

 

 

Pin Description

 

PIN

 

SYMBOL

 

I/O

 

DESCRIPTTION

 

1

 

IN

 

Power

Input​​ Power.​​ Connected​​ to​​ external​​ DC​​ supply​​ and​​ bypass​​ IN​​ to​​ VSS​​ with​​ a​​ ceramic​​ capacitor​​ (1μF​​ MIN).

2

GND

Ground

Power​​ ground.​​ Connect​​ to​​ the​​ thermal​​ pad​​ and​​ to​​ the​​ ground​​ rail​​ of​​ the​​ circuit.

3

NC

/

Not​​ connected.

 

4

FAULT

 

O

​​ This​​ is​​ an​​ open-drain​​ logic​​ output​​ that​​ turns​​ LOW​​ when​​ any​​ protection​​ event​​  ​​​​ 

​​ occurs.

 

5

CE

 

I

Chip​​ Enable​​ (Active​​ Low).​​ Pull​​ this​​ pin​​ to​​ low​​ or​​ leave​​ it​​ floating​​ to​​ enable​​ the​​ IC​​ and​​ force​​ it​​ to​​ high​​ to​​ disable​​ the​​ IC.​​ This​​ is​​ internally​​ pulled​​ down​​ and​​ pull-down​​ resistor​​ is​​ about​​ 200kΩ.

 

6

 

VB

 

I

Battery​​ Voltage​​ Sense​​ Input.​​ Connected​​ to​​ battery’s​​ positive​​ terminal​​ through​​ a​​ 10kΩ​​ resistor.

 

 

7

 

 

ILIM

 

 

O

Over​​ current​​ protection​​ threshold​​ setting​​ pin.​​ Connect​​ a​​ resistor​​ between​​ this​​ pin​​ and​​ GND​​ to​​ set​​ the​​ OCP​​ threshold:

 

 

8

 

OUT

 

O

Output​​ terminal​​ to​​ the​​ charging​​ system.​​ Bypass​​ OUT​​ to​​ VSS​​ with​​ a​​ ceramic​​ capacitor​​ (1μF​​ MIN).

 

9

 

Expose​​ Pad

 

GND

Thermal​​ pad​​ electrically​​ connected​​ to​​ GND​​ pin​​ internally.​​ This​​ pad​​ must​​ be​​ soldered​​ to​​ a​​ large​​ PCB​​ and​​ connected​​ to​​ GND​​ for​​ maximum​​ thermal​​ dissipation.

 

Ordering/​​ Marking​​ Information

 

EHP 2601​​ NNXX ​​​​ X

 

Package Type: ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ F1:DFN2x2​​ 

R:Tape & Reel

 

 

 

 

 

PART​​ NO

OVP​​ TYPE

PACAKGE

TEMPERATURE

TAPE​​ &​​ REEL

EHP2601NNF1R

6.8V

DFN-2x2-8L

-40​​ ~​​ +85

4000/REEL

 

Absolute Maximum Ratings​​ (Note)

SYMBOL

ITEMS

VALUE

UNIT

IN

Input​​ Voltage

-0.3~24

V

OUT

Output​​ Voltage

-0.3~7

V

All​​ other​​ pins

FAULT, ​​​​ CE,​​ ILIM,​​ VB

-0.3~6

V

IOMAX

Output​​ Load​​ Current

1.5

A

ISINK

FAULT ​​​​ Pin​​ Sink​​ Current

15

mA

PDMAX

Power​​ Dissipation*1

 

DFN-2x2-8L

1

W

RθJA

Thermal​​ Resistance*2

75

/W

TJ

Junction​​ Temperature

-40~150

TSTG

Storage​​ Temperature

-55​​ to​​ 150

TSOLDER

Package​​ Lead​​ Soldering​​ Temperature​​ (10s)

260

HBM

ESD​​ Susceptibility,​​ Human​​ Body​​ Model

8

KV

MM

ESD​​ Susceptibility,​​ Machine​​ Model

400

V

CDM

ESD​​ Susceptibility,​​ Charged​​ Device​​ Model

2

KV

Note: Exceed these limits might damage the device. Exposure to absolute maximum rating conditions may affect ​​ ​​ ​​ ​​​​ 

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ device​​ reliability.

*1: Surface mounted on FR-4 Board using 1 square inch pad size, dual side, 1oz copper.​​ 

*2: Power dissipation is calculated by PD​​ = (VIN-VOUT) x IOUT

 

SYMBOL

ITEMS

VALUE

UNIT

IN

Input​​ Supply​​ Voltage

3.5​​ to​​ 24

V

OUT

Output​​ Current

0.51

A

TOPR

Operating​​ Temperature

-40​​ to​​ +85

Recommanded Operating Range

Electrical Characteristics

(VIN​​ = 5V, RILIM​​ = 23K, ​​ CE ​​ floating, TA​​ = 25, CIN=COUT=1µF ,unless otherwise noted. )

E-CMOS​​ Corp.​​ (www.ecmos.com.tw) ​​ 2​​ /​​ 100I15N-Rev.F001​​ 

OV/OC Protection IC and Li+ Charger

​​ Front-End Protection IC with LDO Mode ​​ Current

​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 

EHP2601

Simplified Block Diagram

 

Typical Performance Characteristics

E-CMOS​​ Corp.​​ (www.ecmos.com.tw) ​​ 2​​ /​​ 100I15N-Rev.F001​​ 

OV/OC Protection IC and Li+ Charger

​​ Front-End Protection IC with LDO Mode ​​ Current

​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 

EHP2601

E-CMOS​​ Corp.​​ (www.ecmos.com.tw) ​​ 2​​ /​​ 100I15N-Rev.F001​​ 

OV/OC Protection IC and Li+ Charger

​​ Front-End Protection IC with LDO Mode ​​ Current

​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 

EHP2601

E-CMOS​​ Corp.​​ (www.ecmos.com.tw) ​​ 2​​ /​​ 100I15N-Rev.F001​​ 

OV/OC Protection IC and Li+ Charger

​​ Front-End Protection IC with LDO Mode ​​ Current

​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 

EHP2601