|
|
PDF XB8688D Data sheet ( Hoja de datos )
| Número de pieza | XB8688D | |
| Descripción | One Cell Lithium-ion/Polymer Battery Protection IC | |
| Fabricantes | XySemi | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de XB8688D (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
XB8688D
__________________________________________________________________________________________-
__________________________________
One Cell Lithium-ion/Polymer Battery Protection IC
GENERAL DESCRIPTION
The XB8688 series product is a high
integration solution for lithium-
ion/polymer battery protection. XB8688
contains advanced power MOSFET,
high-accuracy voltage detection circuits
and delay circuits. XB8688 is put into an
TSSOP8 package and only one external
component makes it an ideal solution in
limited space of battery pack.
XB8688 has all the protection functions
required in the battery application including
overcharging, overdischarging, overcurrent
and load short circuiting protection etc. The
accurate overcharging detection voltage
ensures safe and full utilization charging.
The low standby current drains little current
from the cell while in storage.
The device is not only targeted for digital
cellular phones, but also f or any other
Li-Ion and Li-Poly battery-powered
information appliances requiring long-
term battery life.
FEATURES
· Protection of Charger Reverse
Connection
· Protection of Battery Cell Reverse
Connection
· Integrate Advanced Power MOSFET
with Equivalent of 25mΩ RDS(ON)
· TSSOP 8 Package
· Only One External Capacitor
Required
· Over-t emperature Protection
· Overchar ge Current Protection
· Two-step Overcurrent Detection:
-O verdischarge Current
-Load Short Circuiting
· Charger Detection Function
· 0V Battery Charging Function
- Delay Times are generated inside
· H igh-accuracy Voltage Detection
· Low Current Consumption
- Operation Mode:6μA typ.
- Power-down Mode: 3μA max.
· RoHS Compliant and Lead (Pb) Free
APPLICATIONS
• One-Cell Lithium-ion Battery Pack
• Lithium-Pol ymer Battery Pack
XySemi Inc
显示桌面 .s cf
Figure 1. Typical Application Circuit
- 1 - www.xysemi.com
REV0.1
http://www.Datasheet4U.com
1 page  
XB8688D
__________________________________________________________________________________________-
__________________________________
Overcharge Condition
When the battery voltage becomes higher
than the overcharge detection voltage (VCU)
during charging under normal condition
the battery voltage does not drops below the
overcharge detection voltage (VCU) even when a
heavy load, which causes an overcurrent, is
connected, the overcurrent do not work until the
battery voltage drops below the overcharge
and the state continues for the overcharge
detection delay time (tCU) or longer, the
XB8688 turns the charging control FET off
to stop charging. This condition is called
the overcharge condition. 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 work. Detection of load
short-circuiting works regardless of the battery
condition is released in the following two
voltage.
cases:
1, When the battery voltage drops below
Overdischarge Condition
the overcharge release voltage (VCL), the
XB8688 turns the charging control FET on
and returns to the normal condition.
When the battery voltage drops below the
overdischarge detection voltage (VDL)
during discharging under normal condition
2, When a load is connected and
discharging starts, the XB8688 turns the
charging control FET on and returns to the
and it continues for the overdischarge
detection delay time (tDL) or longer, the
XB8688 turns the discharging control FET
normal condition. The release mechanism
is as follows: the discharging current flows
off and stops discharging. This condition is
called overdischarge condition. After the
through an internal parasitic diode of the
discharging control FET is turned off, the
charging FET immediately after a load is
connected and discharging starts, and the
VM pin is pulled up by the RVMD resistor
between VM and VDD in XB8688.
VM pin voltage increases about 0.7 V
Meanwhile when VM is bigger than 1.5
(forward voltage of the diode) from the
GND pin voltage momentarily. The XB8688
V (typ.) (the load short-circuiting detection
voltage), the current of the chip is reduced
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 XB8688 returns to the
normal condition immediately, but in the
case the battery voltage is higher than the
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 under the
overdischarge and power-down conditions.
The power-down condition is released
when a charger is connected and the
overcharge detection voltage (VCU),the chip
does not return to the normal condition
until the battery voltage drops below the
potential difference between VM and VDD
becomes 1.3 V (typ.) or higher (load short-
circuiting detection voltage). At this time,
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 detection voltage when a load
is connected and discharging starts, the
chip does not return to the normal
the FET is still off. When the battery
voltage becomes the overdischarge
detection voltage (VDL) or higher (see note),
the XB8688 turns the FET on and changes
to the normal condition from the
overdischarge condition.
condition.
Remark If the VM pin voltage is no less than the
Remark If the battery is charged to a voltage higher
charger detection voltage (VCHA), when the battery
than the overcharge detection voltage (VCU) and
under overdischarge condition is connected to a
XySemi Inc
- 5 - www.xysemi.com
REV0.1
5 Page 
XB8688D
__________________________________________________________________________________________-
__________________________________
PACKAGE OUTLINE
TSSOP8 PACKAGE OUTLINE AND DIMENSIONS
XySemi Inc
- 11 -
www.xysemi.com
REV0.1
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet XB8688D.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| XB8688D | One Cell Lithium-ion/Polymer Battery Protection IC | XySemi |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |