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)： 19/40頁
文件大?。?/td> 249K
代理商： X3100
X3100/X3101 – Preliminary Information
Characteristics subject to change without notice.
19 of 40
REV 1.1.8 12/10/02
www.xicor.com
Figure 8. Over-Current Protection Mode—Event Diagram
P+
VCS
2
UVP/OCP
T
OCR
V
SS
Over-Current Protection Mode
T
OC
Voc
Normal Operation Mode
P+ = (RLOAD+RSENSE) x ILMON
V
OC
Normal Operation Mode
Event
0
1
3
4
2
V
SS
V
CC
B+
Table 24. Over-Current Protection Mode—Event Diagram Description
Event
Event Description
[0,1)
—Discharge FET is ON (OCP=Vss). Battery cells are permitted to discharge.
—VCS
21
(VCS
2
–VCS
1
) is less than the over-current threshold voltage (V
OC
).
—The device is in normal operation mode (i.e. not in a protection mode).
[1]
—Excessive current flows through the battery terminals P+, dropping the voltage. (See Figure 8.).
—The positive battery terminal voltage (P+) falls, and VCS
21
exceeds V
OC
.
—The internal over-current detection delay timer begins counting down.
—The device is still in Normal Operation Mode
The internal Over-current detection delay timer continues counting for T
OC
seconds.
(1,2)
[2]
—The internal over-current detection delay timer times out, AND VCS
21
is still above V
OC.
—The internal over-current sense circuitry switches the discharge FET OFF (UVP/OCP=Vcc).
—The device now begins a load monitor state by passing a small test current (I
LMON
=7.5μA) out of pin
OVP/LMON. This senses if an over-current condition (i.e. if the load resistance < 150k
) still exists
across P+/P-.
—The device has now entered over-current protection mode.
—It is possible to change the status of UVPC and OVPC in the control register, although the status of pins
UVP/OCP and OVP/LMON will not change until the device has returned from over-current protection
mode.
(2,3)
—The X3100/X3101 now continuously monitors the load resistance to detect whether or not an over-
current condition is still present across the battery terminals P+/P-.
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