RICOH RV5VG101C-E1, RV5VG101C-E2, RV5VG101D-E1, RV5VG101D-E2 Datasheet
RECHARGEABLE LITHIUM-ION
CELL PROTECTORS
RV5VG1
×××
SERIES
1
EK-080-9803
OUTLINE
•
Low Supply Current
...................................................................
TYP. 2.3µA (for normal operations)
•
High Accuracy Detector Threshold
............................................
over-charge ±50mV
over-discharge ±2.5%
•
Variety of Detector Threshold
...................................................
over-charge 4.0 to 4.5 V(0.05V step)
over-discharge 2.0 to 3.0V(0.05V step)
•
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
FEATURES
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, DOUT 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.
APPLICATIONS
•
Li-ion single cell protectors for power pack.
•
High precision protectors for cellular phones, camcorders and any other gadgets using Li-ion cell.
RV5VG1×××
2
BLOCK DIAGRAM
–
+
–
+
8
7
5
4
1
2
3
VDD CT1
CT2
VD1
VD2
Level
Shift
V
SS
DOUT
COUT
V-
Delay
Short
Protect
Charger
Detector
8
7
5
4
1
2
3
RV5VG1×××– ××←Part Number
↑ ↑ ↑
a b c
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.
}
}
Code
b
Designation of release conditions of voltage detector.
C : VD1 (After over-charge detection)
...................
when battery voltage falls below V
DET1–VHYS1 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
DET
1–VHYS1.
VD2 (After excessive-discharge detection)
.....
when battery voltage rises above V
DET2+VHYS2 or a
charger is connected.
a
Development serial number for overcharging/excessive discharge detector threshold, hysteresis
ranges, and short-circuit detector threshold.
c
Designation of Taping Type:
EX. 8pin SSOP: E1, E2
(refer Taping Specifications)
“E2” is prescribed as a standard.
Contents
3
PIN CONFIGURATION
•
8pin SSOP (0.65mm pitch)
1
2
3
4
8
7
6
5
PIN DESCRIPTION
Pin No. Symbol Pin Description
1 DOUT Output Pin of over-discharge detection, CMOS output
2 COUT Output Pin of over-charge detection, CMOS output
3 V- Pin for charger negative input
4 VSS Ground Pin
5 CT
2
Pin for external capacitor for setting output delay of VD2
6 NC No connection
7 CT
1
Pin for external capacitor for setting output delay of VD1
8 VDD Power supply Pin
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