RECHARGEABLE LITHIUM-ION
CELL PROTECTORS
RV5VG1
× ×
SERIES
×
OUTLINE
EK-080-9803
The RV5VG
××
series Li-ion cell protectors are circuits designed for detecting overcharging and excessive dis-
×
charging of rechargeable single-cell lithium-ion batteries (based on the CMOS process). Besides detecting over-
×
charging or excessive discharging of single cell Li-ion battery, the RV5VG1
××
series Li-ion cell protectors include
a short-circuit protector to prevent excessive current due to an external short-circuit.
Each of these protectors comprise two voltage detectors, a hysteresis circuit, a reference voltage source, a logic
circuit, a short-circuit protector and a charger connection detection-circuit. Of the two voltage detectors, VD1
detects overcharging (rising edge of waveform) while VD2 detects excessive discharging (falling edge of waveform).
Voltage output switches to a low (“L”) state if either a rising or falling voltage level is detected. When a short pro-
tection circuit is activated while D
OUT
output is at “H” level, D
OUT
output switches to “L” level after internally set
delay time, which, in turn, switches to “H” level when short is cleared. Required current after detection of over-
discharge is suppressed to minimum by stopping the internal circuit.
Using an external capacitor, the output delay time of the voltage detector for excessive discharge/overcharge
can be set.
The series employ CMOS output type.
FEATURES
•
Low Supply Current ...................................................................TYP. 2.3µA (for normal operations)
•
High Accuracy Detector Threshold............................................over-charge
±50mV
±2.5%
4.0 to 4.5 V(0.05V step)
2.0 to 3.0V(0.05V step)
over-discharge
•
Variety of Detector Threshold ...................................................over-charge
over-discharge
•
Built-in Protection Circuit
•
Short protection voltage may be set insteps 0.05V within the range of 0.1V to 0.4V (accuracy±15%)
•
Adustable sensing delay for overcharging ................................delay of 43ms when external 1000pF is installed
(V
DD
=4.3V)
•
Adjustable sensing delay for excessive discharging.................delay of 24ms when external 1000pF is installed
(V
DD
=2.4V)
•
Output Type ................................................................................CMOS
•
Small Package ............................................................................8pin SSOP
APPLICATIONS
•
Li-ion single cell protectors for power pack.
•
High precision protectors for cellular phones, camcorders and any other gadgets using Li-ion cell.
1
RV5VG1
×
×
×
BLOCK DIAGRAM
8
8
V
DD
7
CT
1
5
5
CT
2
–
+
VD1
Level
Shift
–
+
VD2
Delay
Short
Protect
Charger
Detector
4
4
V
SS
D
OUT
1
1
C
OUT
2
2
V-
3
3
SELECTION GUIDE
In the RV5VG1
××
series, the overcharge/excessive discharge detector threshold, respective hysteresis ranges,
×
short-circuit detector threshold and taping type can be selected at the user's request.
The selection can be made by designating the part number as shown belows.
RV5VG1
× ×
–
×
←
× ×
Part Number
}
}
↑
c
↑ ↑
a b
Code
Contents
a
Development serial number for overcharging/excessive discharge detector threshold, hysteresis
ranges, and short-circuit detector threshold.
Designation of release conditions of voltage detector.
C : VD1 (After over-charge detection) ...................when battery voltage falls below V
DET1
–V
HYS1
or a
load resistance is applied.
VD2 (After excessive-discharge detection) ......when a charger is connected.
D : VD1 (After over-charge detection)...................when battery voltage falls below V
DET1
–V
HYS1
.
VD2 (After excessive-discharge detection) .....when battery voltage rises above V
DET2
+V
HYS2
or a
charger is connected.
Designation of Taping Type:
EX. 8pin SSOP: E1, E2
(refer Taping Specifications)
“E2” is prescribed as a standard.
b
c
2
PIN CONFIGURATION
•
8pin SSOP (0.65mm pitch)
1
2
3
4
8
7
6
5
PIN DESCRIPTION
Pin No.
Symbol
Pin Description
1
2
3
4
5
6
7
8
D
OUT
C
OUT
V-
V
SS
CT
2
NC
CT
1
V
DD
Output Pin of over-discharge detection, CMOS output
Output Pin of over-charge detection, CMOS output
Pin for charger negative input
Ground Pin
Pin for external capacitor for setting output delay of VD2
No connection
Pin for external capacitor for setting output delay of VD1
Power supply Pin
3
RV5VG1
×
×
×
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Ratings
Topt=25˚C, V
SS
=0V
Unit
V
DD
V-
Supply Voltage
V-pin
Input Voltage
CT
1
,
CT
2
pin
C
OUT
pin
Output Voltage
D
OUT
pin
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering)
–0.3 to +12
V
DD
–12 to V
DD
+0.3
V
SS
–0.3 to V
DD
+0.3
V
DD
–12 to V
DD
+0.3
V
SS
–0.3 to V
DD
+0.3
300
–30 to +80
–55 to +125
260˚C, 10s
V
V
V
V
V
mW
˚C
˚C
V
CT1,
V
CT2
V
COUT
V
DOUT
P
D
Topt
Tstg
Tsolder
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any
conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above
these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress
ratings only and do not necessarily imply functional operation below these limits.
4
RV5VG1
×
×
×
ELECTRICAL CHARACTERISTICS
• RV5VG101C
Topt=25˚C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit.
V
DD1
Operating Input Voltage
V
DD2
Over-charge Detector
Threshold
Over-charge Detector
Hysteresis Range
V
DET
1
Output Delay Time
Over-discharge Detector
Threshold
V
DET
2
Output Delay Time
Short protection Voltage
V
DD
to V
SS
V
DD
to V-
1.2
1.2
5
10
V
V
V
DET1
Voltage rising edge detection
4.20
4.25
4.30
V
V
HYS1
0.15
C1=1000pF, V
DD
=3.6V→
4.3V
0.20
0.25
V
t
VDET1
V
DET2
22
43
86
ms
Voltage falling edge detection
C2=1000pF, V
DD
=3.6V→
2.4V
V
DD
=3.9V
V
DD
=3.0V, V-=0V→
1V
2.437
2.50
2.563
V
t
VDET2
Vshort
12
0.17
2.4
1.4
24
0.2
4.8
2.8
0.17
48
0.23
9.6
ms
V
t
short
1
Short protection Delay Time
ms
V
DD
=2.0V, V-=0V→
1V
5.6
0.5
V
V
0.5
V
V
5.0
2.5
0.2
260
µA
µA
V
kΩ
t
short
2
V
OL
1
V
OH
1
V
OL
2
V
OH
2
I
DD
Istandby
Vchg
Rshort
C
OUT
Nch Tr. ON Voltage
C
OUT
Pch Tr. ON Voltage
D
OUT
Nch Tr. ON Voltage
D
OUT
Pch Tr. ON Voltage
Supply Current
Standby Current
Charger Sense Minimum Voltage
V- pin pull down resistance
I
OL
=100µA, V
DD
=4.4V
I
OH
=–100µA, V
DD
=3.9V
I
OL
=100µA, V
DD
=2.4V
I
OH
=–100µA, V
DD
=3.9V
V
DD
=3.9V, V- =0V
V
DD
=2.4V, V-=2.4V
V
DD
=3.3V
V
DD
=3.9V, V-=1.0V
65
3.4
3.4
3.73
0.17
3.73
2.3
0.2
0.13
130
5
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