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R5402N101KD
PRODUCT SPECIFICATIONS
R5402N101KD-TR-F
contents
[1] Outline
[2] Block Diagram
[3] Pin Descriptions
[4] Absolute Maximum Ratings
[5] Electrical Characteristics
[6] Test Circuits
[7] Operation
[8] Technical Notes
[9] Timing Diagrams
[10] Package Dimensions
[11] Mark Specification
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[1] Outline
R5402N101KD
The R5402N101KD is high voltage tolerance CMOS-based protection IC for over-charge/discharge and
over-current of rechargeable one-cell Lithium-ion (Li+)/Lithium polymer battery. The R5402N101KD can
detect over-charge/discharge of Li+ one-cell and excess load current, further include a short circuit
protector for preventing large external short circuit current and the excess charge-current. The
R5402N101KD consists of four voltage detectors, a reference unit, a delay circuit, a short circuit detector,
an oscillator, a counter, and a logic circuit.
When the R5402N101KD detects over-charge or over-charge current, the output of COUT pin switches to
“L” level, that is, the charger’s negative pin level after the internal fixed delay time. When the
R5402N101KD detects over-discharge or excess discharge current, the output of DOUT pin switches to “L”
level after the internal fixed delay time.
After detecting over-charge voltage or over-charge current, if the battery voltage is lower than over-charge
www.DataSheet4U.cdometector threshold voltage, the R5402N101KD can be reset and the output of COUT becomes “H” when a
kind of load is connected to VDD after a charger is disconnected from the battery pack. If a charger is
continuously connected to the battery pack, when the cell voltage becomes equal or lower than the release
voltage from over-charge, over-charge will be released and COUT becomes “H”.
After detecting over-discharge voltage, connect a charger to the battery pack, and when the battery supply
voltage becomes higher than over-discharge detector threshold, or the battery voltage becomes equal or
more than the released voltage from over-discharge, the R5402N101KD is released and the voltage of
DOUT pin becomes “H”. If the battery discharges into 0V level, recharge current is accepted. Once after
detecting excess discharge-current or short circuit, the R5402N101KD is released and DOUT level
becomes “H” with detaching a battery pack from a load system. After detecting over-discharge, supply
current is kept extremely low by halting internal circuits' operation.
When the output of COUT is "H", by setting the V- pin at equal or lower than the delay time shortening
voltage (Typ. -2.0V), the output delay can be shortened. Especially, the delay time of over charge detector
can be reduced into approximately 1/60. Thus, testing time of protector circuit board can be reduced.
Output type of COUT and DOUT is CMOS.
[2] Block Diagram
VDD
scillator Counter
DS Circuit
VD1
VD2
VD4
Logic
Circuit
Delay
Logic
Circuit
Level
Shift
Short
Detector
VD3
VSS
DOUT COUT
V-
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