HM5465AV [HMSEMI]

One Cell Lithium-ion/Polymer Battery Protection IC;


型号：	HM5465AV
厂家：	H&M Semiconductor
描述：	One Cell Lithium-ion/Polymer Battery Protection IC 电池
文件：	总12页 (文件大小：1381K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HM5465A

One Cell Lithium-ion/Polymer Battery Protection IC

◼ DESCRIPTION

◼ FEATURE

The HM5465A series product is a high

◆

Protection of Charger Reverse Connection

Protection of Battery Cell Reverse Connection

Integrate MOSFET

integration solution for lithium-ion/polymer battery

protection. HM5465A contains advanced power

MOSFET, high-accuracy voltage detection circuits

and delay circuits. HM5465A is put into a small

package and only one external component makes it

an ideal solution in limited space of battery pack.

HM5465A has all the protection functions required in

the battery application including overcharging,

over-discharging, overcurrent and load short

circuiting protection etc. The accurate safe and full

utilization charging. The low standby current drains

little current from the cell while in storage. The

device is only targeted for digital cellular phones, but

also for any other Li-ion and Li-Poly

battery-powered information appliance requiring

long-term battery life.

Over-temperature Protection

Two-step Overcurrent Detection:

Over-discharge Current

Load Short Circuiting

◆

Charger Detection Function

0V Battery Charging Function

High-accuracy Voltage Detection

Low Current Consumption

Operation Mode: 3uA typ

Power-down Mode: 1.0uA typ

◼ APPLICATIONS

◆

One-Cell Lithium-ion Battery Pack

Lithium-Polymer Battery Pack

◼ PIN CONFIGURATION

HM5465A

◼ PART NUMBER INFORMATION

HM5465AX

X=Package Code

V: SOT23

M: SOT23-5L

D: DFN2X2-6L

◼ ORDERING INFROMATION

Overcharge

Detection

Voltage

Overcharge Overdischarge

Overdischarge

Release

OverCurrent

Detection

Current

Part Number

Release

Voltage

Detection

Voltage

HM5465AM

HM5465AV

HM5465AD

4.3

4.1

2.4

3.0

2.8

◼ ABSOLUTE MAXIMUM RATINGS ( T_A= 25℃ Unless otherwise noted )

Symbol

V_DD

Parameter

Typical

-0.3~6

-6~8

Unit

Supply Voltage

Input Pin Voltage

T_J

Operation Junction Temperature

Storage Temperature Range

Operation Temperature

150

℃

T_STG

T_OPR

-55~+125

-40~+80

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress rating only and functional device operation is not implied

◼ THERMAL DATA

Symbol

Parameter

Package

SOT23

Max

500

200

0.2

Unit

℃/W

R_θJA

Thermal Resistance-Junction to Ambient

SOT23-5L

DFN2X2-6L

SOT23

P_D

Power Dissipation

SOT23-5L

DFN2X2-6L

0.3

0.5

HM5465A

◼ ELECTRICAL CHARACTERISTICS(T_A=25℃ Unless otherwise noted)

Conditio

Uni

Symbol

Parameter

Min

Typ

Max

Detection Voltage

V_CU

V_CL

Overcharge Detection Voltage

Overcharge Release Voltage

Overdischarge Detection Voltage

Overdischarge Release Voltage

Charger Detection Voltage

V_CU-0.05

V_CL-0.05

V_DL-0.1

V_CU

V_CL

V_CU+0.05

V_CL+0.05

V_DL+0.1

V_DR+0.1

V_DL

V_DR

V_CHA

V_DR-0.1

V_DR

-0.12

Detection Current

I_IOV

Overdischarge Current Detection

Load Short-Circuiting Detection

2.4

2.8

3.2

V_DD=3.5V

I_SHORT

Current Consumption

V_DD=3.5V

VM=0V

V_DD=2.0V

Current Consumption in Normal Operation

I_OPE

Current Consumption in Power Down

I_PDN

floating

VM Internal Resistance

V_DD=3.5V

VM=1.0V

V_DD=2.0V

VM=1.0V

Internal Resistance Between VM and VDD

Internal Resistance Between VM and GND

320

100

*R_VMD

*R_VMS

kΩ

FET on Resistance

V_DD=3.6V

I_VM=1.0A

Equivalent FET on Resistance

*R_SS(ON)

mΩ

Over Temperature Protection

Over Temperature Recovery Degree

120

100

℃

*T_SHD+

*T_SHD-

Detection Delay Time

Overcharge Voltage Detection Delay Time

150

200

100

t_CU

t_DL

Overdischarge Voltage Detection Delay Time

Overdischarge Current Detection Delay Time

Load Short-Circuiting Detection Delay Time

*t_IOV

*t_SHORT

150

200

Note: * The parameter is guaranteed by design

HM5465A

◼ FUNCTIONAL DESCRIPTION

The HM5465A the voltage and current of a battery and protects it from being damaged due to overcharge voltage,

overdischarge voltage, overdischarge current, and short circuit conditions by disconnecting the battery from the load or

charger. These functions are required in order to operate the battery cell within specified limits. The device requires

only one external capacitor. The MOSFET is integrated and its R_SS(ON)is as low as 60mΩ typical

Normal operating mode

If no exception condition is detected, charging and discharging can be carried out freely. This condition is called

the normal operating mode.

Overcharge Condition

When the battery voltage becomes higher than the overcharge detection voltage (V_CU) during charging under

normal condition and the state continues for the overcharge detection delay time (t_CU) or longer, the HM5465A turns the

charging control FET off to stop charging. This condition is called the overcharge condition. The overcharge condition is

released in the following two cases:

1. When the battery voltage drops below the overcharge release voltage (V_CL), the HM5465A turns the charging

control FET on and returns to the normal condition.

2. When a load is connected and discharging starts, the HM5465A turns the charging control FET on and returns

to the normal condition. The release mechanism is as follows: the discharging current flows through an

internal parasitic diode of the charging FET immediately after a load is connected and discharging starts, and

the VM pin voltage increases about 0.7V(forward voltage of the diode) from the GND pin voltage momentarily

the HM5465A detects this voltage and releases the overcharge condition. Consequently, in the case that the

battery voltage is equal to or lower than the overcharge detection voltage (V_CU), the HM5465A returns to the

normal condition immediately, but in the case the battery voltage is higher than the overcharge detection

voltage (V_CU), the chip does not return to the normal condition until the battery voltage drops below the

overcharge detection voltage (V_CU) even if the load is connected. In addition. If the VM pin voltage is equal to

or lower than the overcurrent 1 detection voltage when a load is connected and discharging starts, load is

connected and discharging starts, the chip does not return to the normal condition

Remark If the battery is charged to a voltage higher than the overcharge detection voltage (V_CU) and the

battery voltage does not drop below the overcharge detection voltage (V_CU) even when a heavy load, which

causes an overcurrent, is connected, the overcurrent 1 and overcurrent 2 do not work until the battery voltage

drops below the overcharge detection voltage (V_CU). Since an actual battery has, however, an internal

impedance of several dozens of mΩ, and the battery voltage drops immediately after a heavy load which causes

an overcurrent is connected, the overcurrent 1 and overcurrent 2 work. Detection of load short-circuiting works

regardless of the battery voltage.

Overdischarge Condition

When the battery voltage drops below the overdischarge detection voltage (V_DL) during discharging under

normal condition and it continues for the overdischarge detection delay time (t_DL) or longer, the HM5465A turns

the discharging condition. After the discharging control FET is turned off, the VM pin is pulled up by the R_VMD

resistor between VM and VDD in HM5465A. meanwhile when VM is bigger than 1.5V (typ.) (the load

short-circuiting detection voltage), the current of the chip reduced to the power-down current (I_PDN). This

condition is called power-down condition. The VM and VDD pins are shorted by the R_VMDresistor in the IC

HM5465A

under the overdischarge and power-down conditions. The power-down condition is released when a charger is

connected and the potential difference between VM and VDD becomes 1.3V (typ.) or higher (load

short-circuiting detection voltage). At this time, the FET is still off. When the battery voltage becomes the

overdischarge detection voltage (V_DL) or higher (see note), the HM5465A turns the FET on and changes to the

normal condition from the overdischarge condition.

Remark If the VM pin voltage is no less than the charger detection voltage (V_CHA), the battery under

overdischarge condition is connected to a charger, the overdischarge condition is released (the discharging

control FET is turned on) as usual, provided that the battery voltage reaches the overdischarge release

voltage (V_DU) or higher.

Overcurrent Condition

When the discharging current becomes equal to or higher than a specified value (the VM pin voltage is equal

to or higher than the overcurrent detection voltage) during discharging under normal condition and the state

continues for the overcurrent detection delay time or longer, the HM5465A turns off the discharging control

FET to stop discharging. This condition is called overcurrent condition. (The overcurrent includes overcurrent

or load short-circuiting). The VM and GND pins are shorted internally by the R_VMSresistor under the

overcurrent condition. When a load is connected, the VM pin voltage equals the VDD voltage due to the load.

The overcurrent condition returns to the normal condition when the load is released and the impedance

between the B+ and B- pins becomes higher than the automatic recoverable impedance. When the load is

removed, the VM pin goes back to the GND potential since the VM pin potential is lower than the overcurrent

detection voltage (V_IOV1), the IC returns to the normal condition.

Abnormal Charge Current Detection

If the VM pin voltage drops below the charger detection voltage (V_CHA) during charging under the normal

condition and it continues for the overcharge detection delay time (t_CU) or longer, the HM5465A turns the

charging control FET off and stops charging. This action is called abnormal charge current detection.

Abnormal charge current detection works when the discharging control FET is on and the VM pin voltage

droops below the charger detection voltage (V_CHA). When an abnormal charge current flows into a battery in

the overdischarge condition, the HM5465A consequently turns the charging control FET off and stops charging

after the battery voltage becomes the overdischarge detection voltage and the overcharge detection delay

time (t_CU) elapses. Abnormal charge current detection is released when the voltage difference between VM pin

and GND pin becomes lower than the charger detection voltage (V_CHA) by separating the charger. Since the

0V battery charging function has higher priority than the abnormal charge current detection function, abnormal

charge current may not be detected by the product with the 0V battery charging function while the battery

voltage is low.

Load Short-circuiting Condition

If voltage of VM pin is equal or below short-circuiting protection voltage (V_SHORT), the HM5465A will stop

discharging and battery is disconnected from load. The maximum delay time to switch current off is t_SHORT

This status is released when voltage of VM pin is higher than short protection voltage (V_SHORT), such as when

disconnecting the load.

Delay Circuits

The detection delay time for overdischarge current 2 and load short-circuiting starts when overdischarge

current 1 is detected. As soon as overdischarge current 2 or load short-circuiting is detected over detection

HM5465A

delay time for overdischarge current 2 or load short-circuiting, the HM5465A stops discharging. When battery

voltage falls below overdischarge detection voltage due to overdischarge current, the HM5465A stop

discharging by overdischarge current detection. In this case the recovery of battery voltage is so slow that if

battery voltage after overdischarge voltage detection delay time is still lower than overdischarge detection

voltage, the HM5465A shifts to power-down.

0V Battery Charging Function ^{1 2 3}

This function enables the charging of a connected battery whose voltage is 0V by self-discharge. When a

charger having 0V battery start charging charger voltage (V_0CHA

)

or higher is connected between B+ and B-

pins, the charging control FET gate is fixed to VDD potential. When the voltage between the gate and the

source of the charging control FET becomes equal to or higher than the turn-on voltage by the charger voltage,

the charging control FET is turned on to start charging. At this time, the discharging control FET is off and the

charging current flows through the internal parasitic diode in the discharging control FET. If the battery voltage

becomes equal to or higher than the overdischarge release voltage (V_DU), the normal condition returns.

◼ TYPICAL APPLICATION

Charger+

VDD

100ohm

UP6455

Battery

C1 10nf

Charger-

GND

HM5465A

◼ TIMING CHART

Overcharge and overdischarge detection

Overdischarge current detection

HM5465A

Charger Detection

Abnormal Charger Detection

HM5465A

◼ PACKAGE DIENSIONS

HM5465A

◼ SOLDERING METHODS FOR UNIVERCHIP

Storage environment Temperature=10℃~35℃ Humidity=65%±15%

Reflow soldering of surface mount device

Profile Feature

Average ramp-up rate (T_Lto T_P)

Preheat

Sn-Pb Eutectic Assembly

Pb free Assembly

<3℃/sec

-Temperature Min (Ts_min

)

100℃

150℃

200℃

-Temperature Max (Ts_max

)

-Time (min to max) (ts)

60~120 sec

60~180 sec

Tsmax to T_L

<3℃/sec

-Ramp-up Rate

Time maintained above

-Temperature (T_L)

-Time (t_L)

183℃

217℃

60~150 sec

Peak Temperature (T_P)

Time within 5℃ of actual Peak

Temperature (t_P)

240℃+0/-5℃

260℃+0/-5℃

10~30 sec

20~40 sec

Ramp-down Rate

<6℃/sec

Time 25℃ to Peak Temperature

<6 minutes

HM5465AV [HMSEMI]

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