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R5402N_EY.doc/2005/03/10
Li-LON/POLYMER 1CELL PROTECTOR
R5402xxxxx SERIES (Preliminary)
OUTLINE
The R5402xxxxx Series are high voltage CMOS-based protection ICs for over-charge/discharge of
rechargeable one-cell Lithium-ion (Li+) / Lithium polymer excess load current, further include a short
circuit protector for preventing large external short circuit current and Excess
charge/discharge-current.
Each of these ICs is composed of four voltage detectors, a reference unit, a delay circuit, a short
circuit protector, an oscillator, a counter, and a logic circuit. When the over-charge voltage or the
excess charge-current threshold crosses the each detector threshold from a low value to a high value,
the output of COUT pin switches to low level after internal fixed delay time. The conditions to release
over-charge detector are different by mask options. In terms of so called “Latch function” version, after
detecting over-charge or excess charge current, these detectors 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, and the cell voltage becomes lower than over-charge detector threshold. If a charger is continue
to be connected to the battery pack, even the cell voltage becomes lower than over-charge detector
threshold, over-charge state is not released. On the other hand, in terms of so called, “ Released by
voltage level” version, after detecting over-charge, when the cell voltage reaches the released voltage
from over-charge, the output of COUT becomes “H”
The output of DOUT pin, the output of Over-discharge detector and Excess discharge-current detector,
switches to “L” level after internally fixed delay time, when discharged voltage crosses the detector
threshold from a high value to a value lower than VDET2.
The conditions to release over-discharge detector are also different by mask options. In terms of so
called “Latch function” version, 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,
VD2 is released and the voltage of DOUT pin becomes "H" level. On the other hand, in terms of so called
“Released by voltage level” version, in case that the charger is not connected, when the cell voltage
becomes equal released voltage from over-discharge, over-discharge detector is released. In case that a
charger is connected, and when the cell voltage becomes the released voltage from over-discharge, the
over-discharge detector is released.
An excess discharge-current and short circuit state can be sensed and cut off through the built in
excess current detector, VD3, with DOUT being enabled to low level. Once after detecting excess
discharge-current or short circuit, the VD3 is released and DOUT level switches to high by detaching a
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R5402xxxxx (Preliminary)
battery pack from a load system.
After detecting over-discharge, supply current will be kept extremely low by halting internal circuits'
operation.
When the output of COUT is “H”, if V- pin level is set at Vss-2V, the delay time of detector can be
shortened. Especially, the delay time of over-charge detector can be reduced into approximately 1/57.
Therefore, testing time of protector circuit board can be reduced. Output type of COUT and DOUT are
CMOS. 6-pin, SOT-23-6 is available.
FEATURES
Manufactured with High Voltage Tolerant Process ...Absolute Maximum Rating
Low supply current ..................................Supply current (At normal mode)
C version: (detecting over-discharge)
35V
Typ. 4.0µA
Max. 0.1µA
B/D version: (detecting over-discharge) Typ. 1.2µA/Max. 2.0µA
High accuracy detector threshold .............Over-charge detector (Topt=25°C)
±25mV
(Topt=-5 to 55°C)
±30mV
Over-discharge detector
±2.5%
Excess discharge-current detector
±15mV
Excess charge-current detector
±30mV
Variety of detector threshold ....................Over-charge detector threshold
4.0V-4.5V step of 0.005V
Over-discharge detector threshold 2.0V-3.0V step of 0.005V
Excess discharge-current threshold
0.05V-0.20V step of 0.005V
Excess charge-current threshold
Fixed at -0.1V
Short Detector Threshold
Fixed at 0.8V
Internal fixed Output delay time ...............Over-charge detector Output Delay 250ms(F type) /1s (C, K type)
(Select among the options)
Over-discharge detector Output Delay
20ms
Excess discharge-current detector Output Delay 12ms
Short Circuit detector Output Delay
300µs
Excess charge-current detector Output Delay 8ms(K Type) /16ms(C,F Type)
Output Delay Time Shortening Function..At COUT is “H”, if V- level is set at –2V, the Output Delay
time of all items except short-circuit can be reduced.
(Delay Time for over-charge becomes about 1/57 of
normal state.)
0V-battery charge option ..........................acceptable/unacceptable
Conditions for release over-charge detector With Latch function (B/C version)
With Released voltage, (D version)
Conditions for Release over-discharge detector Latch Type: (C version)
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R5402Nxxxxx (Preliminary)
...............................................................
Released Voltage (B/D version)
Ultra Small package ................................ SOT-23-6
APPLICATIONS
Li+ / Li Polymer protector of over-charge, over-discharge, excess-current for battery pack
High precision protectors for cell-phones and any other gadgets using on board Li+ / Li Polymer
battery
BLOCK DIAGRAMS
B version
VDD
scillator
VD1
VD2
VD4
Counter
Logic
Circuit
Delay
Logic
Circuit
DS Circuit
Level
Shift
Short
Detector
VD3
VSS
DOUT COUT
V-
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R5402xxxxx (Preliminary)
D version
VDD
VD1
VD2
scillator
VD4
Counter
Logic
Circuit
Delay
Logic
Circuit
DS Circuit
Level
Shift
Short
Detector
VD3
VSS
C version
VDD
DOUT COUT
V-
VD1
VD2
scillator
VD4
Counter
Logic
Circuit
Delay
Logic
Circuit
DS Circuit
Level
Shift
Short
Detector
VD3
VSS
DOUT COUT
V-
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R5402Nxxxxx (Preliminary)
SELECTION GUIDE
In the R5402xxxxx Series, four of the input threshold for over-charge, over-discharge, excess discharge
current, and excess charge current detectors can be designated.
Part Number is designated as follows:
R5402x xxxxx-xx
↑ ↑ ↑↑ ↑
a b cd e
Part Number
Code
a
b
c
d
e
Contents
Package Type N: SOT-23-6
Serial Number for the R5402 Series designating input four threshold for
over-charge, over-discharge, excess discharge-current, and excess
charge-current detectors.
Designation of Output delay option of over-charge, excess charge-current, and
excess discharge-current.
Designation of version symbols
B version: With Latch function after over-charge, Released by voltage level from
Over-discharge
C version: With Latch function after Over-charge and Over-discharge
D version: Released by voltage level from Over-charge and Over-discharge
Taping Type: TR (refer to Taping Specification)
PIN CONFIGURATIONS
SOT-23-6
654
(mark side)
123
5