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RV5VG101D-E2 Datasheet

  • RV5VG101D-E2

  • RECHARGEABLE LITHIUM-ION CELL PROTECTORS

  • 9頁

  • RICOH

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RECHARGEABLE LITHIUM-ION
CELL PROTECTORS
RV5VG1
脳 脳
SERIES
脳
OUTLINE
EK-080-9803
The RV5VG
脳脳
series Li-ion cell protectors are circuits designed for detecting overcharging and excessive dis-
脳
charging of rechargeable single-cell lithium-ion batteries (based on the CMOS process). Besides detecting over-
脳
charging or excessive discharging of single cell Li-ion battery, the RV5VG1
脳脳
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 (鈥淟鈥? 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 鈥淗鈥?level, D
OUT
output switches to 鈥淟鈥?level after internally set
delay time, which, in turn, switches to 鈥淗鈥?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
鈥?/div>
Low Supply Current ...................................................................TYP. 2.3碌A(chǔ) (for normal operations)
鈥?/div>
High Accuracy Detector Threshold............................................over-charge
鹵50mV
鹵2.5%
4.0 to 4.5 V(0.05V step)
2.0 to 3.0V(0.05V step)
over-discharge
鈥?/div>
Variety of Detector Threshold ...................................................over-charge
over-discharge
鈥?/div>
Built-in Protection Circuit
鈥?/div>
Short protection voltage may be set insteps 0.05V within the range of 0.1V to 0.4V (accuracy鹵15%)
鈥?/div>
Adustable sensing delay for overcharging ................................delay of 43ms when external 1000pF is installed
(V
DD
=4.3V)
鈥?/div>
Adjustable sensing delay for excessive discharging.................delay of 24ms when external 1000pF is installed
(V
DD
=2.4V)
鈥?/div>
Output Type ................................................................................CMOS
鈥?/div>
Small Package ............................................................................8pin SSOP
APPLICATIONS
鈥?/div>
Li-ion single cell protectors for power pack.
鈥?/div>
High precision protectors for cellular phones, camcorders and any other gadgets using Li-ion cell.
1

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