參數(shù)資料
型號： X3100
英文描述： Reed Relay; Contacts:SPST; Switching Current Max:0.5A; Switching Voltage Max:200V; Contact Carry Current:1A; Coil Voltage DC Max:5V; Relay Terminals:DIP-14; Relay Mounting:PC Board; Contact Carrying Power:10W
中文描述： 3或4芯鋰離子電池保護(hù)和監(jiān)控器IC
文件頁數(shù)： 11/40頁
文件大?。?/td> 249K
代理商： X3100
X3100/X3101 – Preliminary Information
Characteristics subject to change without notice.
11 of 40
REV 1.1.8 12/10/02
www.xicor.com
Current Sense Gain (CSG1, CSG0)
These bits set the gain of the current sense amplifier.
These are x10, x25, x80 and x160. For more detail, see
section “Current Monitor Function” on page 20.
Table 14. Current Sense Gain Control
Charge/Discharge Control (OVPC, UVPC)
The OVPC and UVPC bits allow control of cell charge
and discharge externally, via the SPI port. These bits
control the OVP/LMON and UVP/OCP pins, which in turn
control the external power FETs.
Using P-channel power FETs ensures that the FET is
on when the pin voltage is low (Vss), and off when the
pin voltage is high (Vcc).
OVP/LMON and UVP/OCP can be controlled by using
the WCNTR Instruction to set bits OVPC and UVPC in
the Control register (See page 10).
Table 15. UVP/OVP Control
It is possible to set/change the values of OVPC and
UVPC during a protection mode. A change in the state
of the pins OVP/LMON and UVP/OCP, however, will not
take place until the device has returned from the
protection mode.
Cell Voltage Balance Control (CBC1-CBC4)
This function can be used to adjust individual battery
cell voltage during charging. Pins CB1–CB4 are used to
control external power switching devices. Cell voltage
balancing is achieved via the SPI port.
Table 16. CB1—CB4 Control
CB1–CB4 can be controlled by using the WCNTR In-
struction to set bits CBC1–CBC4 in the control register
(Table 16).
STATUS REGISTER
The status of the X3100 or X3101 can be verified by
using the RDSTAT command to read the contents of the
Status Register (Table 17).
Table 17. Status Register.
The function of each bit in the status register is shown
in Table 18.
Bit 0 of the status register (VRGS+OCDS) actually
indicates the status of two conditions of the X3100 or
X3101. Voltage Regulator Status (VRGS) is an
internally generated signal which indicates that the
output of the Voltage Regulator (VRGO) has reached an
output of 5VDC ± 0.5%. In this case, the voltage
regulator is said to be “tuned”. Before the signal VRGS
goes low (i.e. before the voltage regulator is tuned), the
voltage at the output of the regulator is nominally 5VDC
± 10% (See section “Voltage Regulator” on page 21.)
Over-current Detection Status (OCDS) is another
internally generated signal which indicates whether or
not the X3100 or X3101 is in over-current protection
mode.
Signals VRGS and OCDS are logically OR’ed together
(VRGS+OCDS) and written to bit 0 of the status register
(See Table 18, Table 17 and Figure 2).
Control Register Bits
CSG1
0
0
1
1
Operation
CSG0
0
1
0
1
Set current sense gain=x10
Set current sense gain=x25
Set current sense gain=x80
Set current sense gain=x160
Control Register Bits
OVPC
1
0
x
x
Operation
UVPC
x
x
1
0
Pin OVP=V
SS
(FET ON)
Pin OVP=V
CC
(FET OFF)
Pin UVP=V
SS
(FET ON)
Pin UVP=V
CC
(FET OFF)
Control Register Bits
CBC4
CBC3
x
x
x
x
x
x
x
x
x
1
x
0
1
x
0
x
Operation
Set CB1=V
CC
(ON)
Set CB1=V
SS
(OFF)
Set CB2=V
CC
(ON)
Set CB2=V
SS
(OFF)
Set CB3=V
CC
(ON)
Set CB3=V
SS
(OFF)
Set CB4=V
CC
(ON)
Set CB4=V
SS
(OFF)
CBC2
x
x
1
0
x
x
x
x
CBC1
1
0
x
x
x
x
x
x
7
6
5
4
3
2
1
0
0
0
0
0
0
CCES+
OVDS
UVDS
VRGS+
OCDS
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