RV5VG101C Datasheet, PDF (1/9 Pages) RICOH electronics devices division – RECHARGEABLE LITHIUM-ION CELL PROTECTORS

RECHARGEABLE LITHIUM-ION
CELL PROTECTORS
RV5VG1××× SERIES
EK-080-9803
OUTLINE
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 DOUT 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.
FEATURES
• Low Supply Current ^{...................................................................TYP.} 2.3µA (for normal operations)
• High Accuracy Detector Threshold............................................over-charge
±50mV
over-discharge
• Variety of Detector Threshold...................................................over-charge
±2.5 %
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
(VDD=4.3V)
• Adjustable sensing delay for excessive discharging.................delay of 24ms when external 1000pF is installed
(VDD=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.
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