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)： 20/40頁
文件大?。?/td> 249K
代理商： X3100
X3100/X3101 – Preliminary Information
Characteristics subject to change without notice.
20 of 40
REV 1.1.8 12/10/02
www.xicor.com
MONITOR MODE
Analog Multiplexer Selection
The X3100 and X3101 can be used to externally monitor
individual battery cell voltages, and battery current.
Each quantity can be monitored at the analog output pin
(AO), and is selected using the analog select (AS0–AS2)
pins (Table 25). Also, see Figure 9.
Current Monitor Function
The voltages monitored at pins
VCS
1
and VCS
2
can be
used to calculate current flowing through the battery
terminals, using an off-board microcontroller with an A/D.
The internal gain of the X3100 or X3101 current sense
voltage amplifier can be selected by using the WCNTR
Since the value of the sense resistor (R
SENSE
) is small
(typically in the order of tens of m
),
and since the
resolution of various A/D converters may vary, the
voltage across R
SENSE
(
VCS
1
and VCS
2
) is amplified
internally with a gain of between 10 and 160, and output
to pin AO (Figure 9).
Figure 9. X3100/X3101 Monitor Circuit
Instruction to set bits CSG1 and CSG0 in the control
register (Table 14). The CSG1 and CSG0 bits select one
[3]
—The device detects the load resistance has risen above 250k
.
—Voltages P+ and VCS
21
return to their normal levels.
—The test current from pin OVP/LMON is stopped (I
LMON
=0μA)
—The device has now returned from the load monitor state
—The internal over-current release time timer begins counting down.
—Device is still in over-current protection mode.
The internal over-current release timer continues counting for T
OCR
seconds.
(3,4)
[4]
—The internal over-current release timer times out, and VCS
21
is still below V
OC.
—The device returns from over-current protection mode, and is now in normal operation mode.
—The discharge FET is automatically switched ON (UVP/OCP=Vss)—unless the status of UVPC has
been changed in the control register during the over-current protection mode.
—The status of the charge FET remains unaffected.
—Discharge of the battery cells is once again possible.
Table 24. Over-Current Protection Mode—Event Diagram Description (Continued)
Event
Event Description
Table 25. AO Selection Map
AS2
L
L
L
L
H
H
H
H
AS1 AS0
L
L
H
H
L
L
H
H
AO output
L
H
L
H
L
H
L
H
V
SS
(1)
VCELL
1
–VCELL
2
(VCELL
12
)
VCELL
2
–VCELL
3
(VCELL
23
)
VCELL
3
–VCELL
4
(VCELL
34
)
VCELL
4
–Vss (VCELL
4
)
VCS
1
–VCS
2
(VCS
12
)
(2)
VCS2–VCS
1
(VCS
21
)
(2)
V
SS
Notes:
(1) This is the normal state of the X3100 or X3101. While in
this state Over-charge and Over-discharge Protection
conditions are periodically monitored (See “Periodic Pro-
tection Monitoring” on page 12.)
(2) VCS
1
, VCS
2
are read at AO with respect to a DC bias
voltage of 2.5V (See section “Current Monitor Function”
on page 20).
Over-Current
Protection
VCS
1
VCS
2
+
-
CSG1CSG0
Config
Register
A
n
M
AS0
AS1
AS2
AO
SPI
I/F
S0
SCL
CS
SI
R
SENSE
Gain
Setting
Cross-Bar
Switch
X3100/X3101
OP1
Voltage
Level
Shifters
Cell 1 Voltage
Cell 2 Voltage
Cell 3 Voltage
Cell 4 Voltage
2.5V
P-
R2
R2
R1
R1
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