HM5465AM [HMSEMI]
One Cell Lithium-ion/Polymer Battery Protection IC;型号: | HM5465AM |
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
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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
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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
Voltage
HM5465AM
HM5465AV
HM5465AD
4.3
4.3
4.3
4.1
4.1
4.1
2.4
2.4
2.4
3.0
3.0
3.0
2.8
2.8
2.8
◼ ABSOLUTE MAXIMUM RATINGS ( TA = 25℃ Unless otherwise noted )
Symbol
VDD
Parameter
Typical
-0.3~6
-6~8
Unit
V
Supply Voltage
VM
Input Pin Voltage
V
TJ
Operation Junction Temperature
Storage Temperature Range
Operation Temperature
150
℃
℃
℃
TSTG
TOPR
-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
200
0.2
Unit
℃/W
℃/W
℃/W
W
RθJA
Thermal Resistance-Junction to Ambient
SOT23-5L
DFN2X2-6L
SOT23
PD
Power Dissipation
SOT23-5L
DFN2X2-6L
0.3
W
0.5
W
HM5465A
◼ ELECTRICAL CHARACTERISTICS(TA=25℃ Unless otherwise noted)
Conditio
Uni
Symbol
Parameter
Min
Typ
Max
t
n
Detection Voltage
VCU
VCL
Overcharge Detection Voltage
Overcharge Release Voltage
Overdischarge Detection Voltage
Overdischarge Release Voltage
Charger Detection Voltage
VCU-0.05
VCL-0.05
VDL-0.1
VCU
VCL
VCU+0.05
VCL+0.05
VDL+0.1
VDR+0.1
V
V
V
V
V
VDL
VDL
VDR
VCHA
VDR-0.1
VDR
-0.12
Detection Current
IIOV
Overdischarge Current Detection
Load Short-Circuiting Detection
2.4
8
2.8
12
3.2
16
A
A
VDD=3.5V
VDD=3.5V
ISHORT
Current Consumption
VDD=3.5V
VM=0V
VDD=2.0V
Current Consumption in Normal Operation
3
1
6
3
uA
uA
IOPE
Current Consumption in Power Down
VM
pin
IPDN
floating
VM Internal Resistance
VDD=3.5V
VM=1.0V
VDD=2.0V
VM=1.0V
Internal Resistance Between VM and VDD
Internal Resistance Between VM and GND
320
100
*RVMD
*RVMS
kΩ
kΩ
FET on Resistance
VDD=3.6V
IVM=1.0A
Equivalent FET on Resistance
45
55
65
*RSS(ON)
mΩ
Over Temperature Protection
Over Temperature Protection
Over Temperature Recovery Degree
120
100
℃
℃
*TSHD+
*TSHD-
Detection Delay Time
Overcharge Voltage Detection Delay Time
150
80
200
100
20
mS
mS
mS
uS
tCU
tDL
Overdischarge Voltage Detection Delay Time
Overdischarge Current Detection Delay Time
Load Short-Circuiting Detection Delay Time
10
*tIOV
*tSHORT
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 RSS(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 (VCU) during charging under
normal condition and the state continues for the overcharge detection delay time (tCU) 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 (VCL), 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 (VCU), the HM5465A returns to the
normal condition immediately, but in the case the battery voltage is higher than the overcharge detection
voltage (VCU), the chip does not return to the normal condition until the battery voltage drops below the
overcharge detection voltage (VCU) 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 (VCU) and the
battery voltage does not drop below the overcharge detection voltage (VCU) 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 (VCU). 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 (VDL) during discharging under
normal condition and it continues for the overdischarge detection delay time (tDL) or longer, the HM5465A turns
the discharging condition. After the discharging control FET is turned off, the VM pin is pulled up by the RVMD
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 (IPDN). This
condition is called power-down condition. The VM and VDD pins are shorted by the RVMD resistor 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 (VDL) 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 (VCHA), 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 (VDU) 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 RVMS resistor 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 (VIOV1), the IC returns to the normal condition.
Abnormal Charge Current Detection
If the VM pin voltage drops below the charger detection voltage (VCHA) during charging under the normal
condition and it continues for the overcharge detection delay time (tCU) 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 (VCHA). 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 (tCU) elapses. Abnormal charge current detection is released when the voltage difference between VM pin
and GND pin becomes lower than the charger detection voltage (VCHA) 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 (VSHORT), the HM5465A will stop
discharging and battery is disconnected from load. The maximum delay time to switch current off is tSHORT
.
This status is released when voltage of VM pin is higher than short protection voltage (VSHORT), 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 (V0CHA
)
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 (VDU), the normal condition returns.
◼ TYPICAL APPLICATION
Charger+
VT
VM
VDD
100ohm
UP6455
Battery
C1 10nf
VM
Charger-
GND
HM5465A
◼ TIMING CHART
Overcharge and overdischarge detection
Overdischarge current detection
HM5465A
Charger Detection
Abnormal Charger Detection
HM5465A
◼ PACKAGE DIENSIONS
HM5465A
HM5465A
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 (TL to TP)
Preheat
Sn-Pb Eutectic Assembly
Pb free Assembly
<3℃/sec
<3℃/sec
-Temperature Min (Tsmin
)
100℃
150℃
150℃
200℃
-Temperature Max (Tsmax
)
-Time (min to max) (ts)
60~120 sec
60~180 sec
Tsmax to TL
<3℃/sec
<3℃/sec
-Ramp-up Rate
Time maintained above
-Temperature (TL)
-Time (tL)
183℃
217℃
60~150 sec
60~150 sec
Peak Temperature (TP)
Time within 5℃ of actual Peak
Temperature (tP)
240℃+0/-5℃
260℃+0/-5℃
10~30 sec
20~40 sec
Ramp-down Rate
<6℃/sec
<6℃/sec
Time 25℃ to Peak Temperature
<6 minutes
<6 minutes
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