MM3645A01VRE [MITSUMI]

1cell Lithium-ion/Lithium-polymer battery protection IC;


型号：	MM3645A01VRE
厂家：	MITSUMI ELECTRONICS, CORP.
描述：	1cell Lithium-ion/Lithium-polymer battery protection IC
文件：	总4页 (文件大小：50K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MITSUMI

1cell Lithium-ion/Lithium-polymer battery protection IC MM3645 Series

1cell Lithium-ion/Lithium-polymer battery protection IC

MM3645 Series

Outline

MM3645 series are protection ICs for Lithium-ion or Lithium-polymer secondary battery using high voltage

CMOS process. They protect the battery pack/system from overcharge, overdischarge, and overcurrent, etc.

by controlling FET SW.

They realize overcurrent detection with high accuracy and improved temperature dependence by using

an external chip resistor. In addition, by using charging off mode, it reduces the off current of system and

prevents Lithium-ion battery from discharging when the system is off.

(Unless otherwise speciﬁed, Topr=+25°C)

Features

(1) Range and accuracy of detection / release voltage

Overcharge detection voltage

3.6V to 5.0V, 5mV steps

Accuracy±±0mV

Accuracy±±5mV (Topr=−±0 to +60°C)

Accuracy±35mV

Overdischarge detection voltage

Discharging overcurrent detection voltage

Charging overcurrent detection voltage

Short detection voltage

±.0V to 3.0V, 50mV steps

±0mV to 300mV, 1mV steps

−±0mV to −300mV, 1mV steps

0.45V to 0.9V, 50mV steps

Accuracy±15ꢀ

Accuracy±100mV

(±) Release condition from each protection mode

Overcharge release condition

”VDD < Overcharge release voltage” and ”Connecting load (V− > 0.4V)”

”VDD > Overdischarge release voltage” and ”Connecting charger(V− < 0.±V)”

”Removing load (V− < 0.±V)”

Overdischarge release condition

Discharging overcurrent release condition

Charging overcurrent release condition

”Connecting load (V− > 0.4V)”

(3) Range of detection delay time

Overcharge detection delay time

Overdischarge detection delay time

Selection from 0.±5s, 0.5s, 1.0s

Selection from ±0ms, ±4ms, 96ms, 1±5ms

Discharging overcurrent detection delay time Selection from 8ms, 1±ms, 16ms, ±0ms, 48ms

Charging overcurrent detection delay time

Short detection delay time

Selection from 8ms, 1±ms, 16ms, ±0ms, 48ms

±50µs standard

(4) 0V battery charge function

Selection from ”Prohibition” or ”Permission”

CNT>VDD-0.4 : DOUT=L Discharge=OFF

CNT<VSS-0.4 : DOUT=H Discharge=ON

(5) Forcible discharge OFF mode

(6) Low current consumption

Normal mode

Typ. 3.0µA, Max. 5.5µA

Max. 0.1µA

Stand-by mode

(7) Absolute maximum ratings

VDD pin

VSS−0.3V to +1±V

VDD−±8V to VDD+0.3V

VSS−0.3V to VDD+0.3V

−55 to +1±5°C

COUT pin and V- pin

DOUT, CS and CNT pin

Storage temperature

Operation temperature

−40 to +85°C

• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.

• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.

MITSUMI

1cell Lithium-ion/Lithium-polymer battery protection IC MM3645 Series

Pin Assignment

Top view

TSOP-8A

Pin No.

Function

Discharge FET control terminal

Charge FET control terminal

DOUT

COUT

V-

VSS

VDD

Charger negative voltage input terminal

Delay short terminal

Discharge FET mode control terminal

Overcurrent detection input terminal.

Positive power supply voltage input terminal

Negative power supply voltage input terminal

CNT

Selection Guide

Detection / Release voltage

0V battery

charge

Delay time

combination

Product name

Package

function

Vdet1

4.430

4.405

4.430

Vrel1

4.330

4.305

4.330

Vdet2

2.300

2.500

2.400

Vrel2

2.300

2.500

2.400

Vdet3

37.0

Vdet4

−25.0

−37.0

−25.0

Vshort

0.9

MM3645A01VRE

MM3645A02VRE

MM3645B01VRE

MM3645B02VRE

TSOP-8A

Permission

Prohibition

37.0

0.9

43.0

0.9

43.0

0.6

(TSOP-8A ··· 3,000pcs/Reel)

*1 Delay time combination

Overcharge detection delay time

Overdischarge detection delay time

tVdet1

1.0s

tVdet2

tVdet3

tVdet4

tshort

125ms

16ms

8ms

Discharging overcurrent detection delay time

Charging overcurrent detection delay time

Short detection delay time

250µs

Please inquire to us, if you request a rank other than the above.

• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.

• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.

MITSUMI

1cell Lithium-ion/Lithium-polymer battery protection IC MM3645 Series

Application Circuit

B+

P+

Rds

Oscillator

Level

shift

Counter

Logic

0V cell

Charge

Over

charge

Cell

Charge

Over

Discharge

OFF mode

current

Discharge

Over

CNT

Icnt

Over

discharge

current

CHG / Load

detector

RpuVM

RpdVM

Short

V-

Delay

C±

R±

OUT

Rsns

DFET

CFET

B-

P-

· R1 and C1 stabilize a supply voltage fluctuation. However, the detection voltage rises by the current

consumption of IC when R1 is too large, and the value of R1 is adjusted to 1kohm or less. Moreover, adjust

the value of C1 to 0.01uF or more to do the stability operation, please.

· R1 and R± resistors are current limit resistance if a charger is connected reversibly or a high-voltage

charger that exceeds the absolute maximum rating is connected. R1 and R± may cause a power

consumption will be over rating of power dissipation, therefore the ”R1+R±” should be more than 1kohm.

Moreover, if R± is too enlarged, the charger connection release cannot be occasionally done after the

overdischarge is detected, so adjust the value of R± to 10kohm or less, please.

· Rsns is sense resistance for detect charge current and discharge current. If R3 is too enlarged, the power

loss increases. Moreover, the power might exceed a dissipation of resistance by the overcurrent, please

select R3 according to the battery spec, after confirming the characteristic.

· Current threshold of discharging overcurrent detection and short detection (Idoc, Ishort) are expressed in the

following equations.

Idoc = Vdet3 / Rsns

Ishort = Vshort / (Rsns + ±Ron)

*Ron : ON resistance of CFET and DFET

· Current threshold of charging overcurrent detection (Icoc) is expressed in the following equation.

Icoc = Vdet4 / Rsns

· C4 has removed the exogenous noise to CS terminal. Similarly R3 and C5 have removed the exogenous

noise to a CNT terminal. Please select required value in consideration of the system characteristic, and

arrange near the each terminal.

• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.

• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.

MITSUMI

1cell Lithium-ion/Lithium-polymer battery protection IC MM3645 Series

· C± and C3 have effect that the system stability about voltage ripple and exogenous noise. Please decide

that these capacitors should be inserted or not, where should be inserted, and capacitance value in

consideration of the system characteristic.

· In the over discharge mode V- terminal pulled up to VDD by RpuVM. If charger is connected, Iv- flow to

Pterminal from P+ and the voltage drop ( V) arises in R1. Therefore the cell voltage ( Vcell ) at

overdischarge release is expressed in the following equation.

Vcell = Vrel± +

= Vrel± + R1 *Iv-

= Vrel± + R1 *Vchg / (R1 + RpuVM + R±)

* Vchg : Charger voltage

Symbol

Part

Resistor

Min.

Typ.

330

0.1

Max.

Unit

Capacitor

Resistor

0.01

1.0

µF

R±

±.±k

10k

Rsns

C±

Sense resistor

Capacitor

Resistor

0.1

µF

100k

Capacitor

0.01

0.1

µF

Capacitor

DFET

CFET

Nch MOS FET

• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.

• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.

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