RICOH R5402N Technical data
R5402N Series
Li-ion/polymer 1Cell Protector
The R5402Nx Series are high input voltage CMOS-based protection ICs for over-charge/discharge of rechargeable one-cell
Lithium-ion (Li-ion) / 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, reference units, a delay circuit, a short circuit protector, an oscillator, a
counter, and a logic circuit. SOT-23-5 package is available.
FEATURES
•
Supply Voltage (VDD)
•
Charger Negative Input Voltage (V-)
•
Operating Input Voltage Range (VDD)
•
Supply Current (IDD)
•
Standby Current (Is)
•
Over-charge
(VDET1)
•
Over-discharge
(VDET2)
····························
·····························
·····························
Detector Threshold Range·······
Detector Threshold Accuracy···
Output Delay Time (tV
Detector Threshold Range·······
Detector Threshold Accuracy···
Output Delay Time (tV
BLOCK DIAGRAMS
12V (Absolute Maximum Rating)
···
-35V (Absolute Maximum Rating)
·····
1.5V to 5.0V
Typ. 4.0μA
Max. 0.1μA (C Version)
Max. 2.0μA (B, D Versio n)
4.0V to 4.5V (0.005V steps)
±25mV (25°C)
±30mV (-5 to 55°C)
DET
1
) ······
Typ. 1.0s or 0.25s
2.0V to 3.0V (0.1V steps)
±2.5%
DET
2
) ······
Typ. 20ms
•
Excess
discharge-current
DET
3
)
(V
•
Excess
charge-current
DET
4
)
(V
•
Short Protection Voltage (Vshort)·······················
Detector Threshold Range ····
Detector Threshold Accuracy
Output Delay Time (tVDET3)····
Detector Threshold Range ····
Detector Threshold Accuracy
Output Delay Time (tVDET4)····
Output Delay Time (t
short) ······
• 0V-battery charge·············································
• Package···························································
0.05V to 0.20V (0.005V steps)
·····
±15mV
Typ. 6ms or 12ms
-0.1V
·····
±30mV
Typ. 8ms or 16ms
Typ. 0.8V
Typ. 200μs or 300μs
Available
SOT-23-6
R5402NxxxxB R5402NxxxxC R5402NxxxxD
DD
V
Oscillator Counter
VD1
VD4
VD2
VD3
SS
V
SELECTION GUIDE
Logic
Circuit
Delay
Logic
Circuit
DC Circuit
Level
Shift
Short
Detector
OUT
D
OUT
C
V-
DD
V
Oscillator Counter
VD1
VD4
VD2
VD3
SS
V
Logic
Circuit
Delay
Logic
Circuit
DC Circuit
Level
Shift
Short
Detector
OUT
D
OUT
C
V-
V
DD
Oscillator Counter
Logic
VD1
VD4
VD2
VD3
SS
V
Circuit
Delay
Logic
Circuit
OUT
D
Package Quantity per Reel Part No.
SOT-23-6 3,000 pcs R5402N.xxx.$.∗ -TR-FE
.
xxx : Serial Number for the R5402 Series designating input four threshold for
over-charge, over-discharge, excess discharge-current, and excess
charge-current detectors
: Designation of Output delay time option of over-charge,
.$.
excess discharge-current, and excess charge-current.
(.C.) tVDET1=1.0s, tVDET3=12ms, tVDET4=16ms
(.E.) tVDET1=1.0s, tVDET3=6ms, tVDET4=8ms
(.F.) tVDET1=0.25s, tVDET3=12ms, tVDET4=16ms
(.K.) tVDET1=1.0s, tVDET3=12ms, tVDET4=8ms
Designation of version symbols
:
.∗
(.B.) With Latch function after Over-charge, Auto Release after Over-discharge
(.C.) With Latch function after Over-charge and Over-discharge
(.D..) Auto Release after Over-charge and Over-discharge
PACKAGE (Top View)
SOT-23-6
DC Circuit
Level
Shift
OUT
C
Short
Detector
V-
6 5 4
1DOUT
2
V3COUT
4 NC
5VDD
1 2 3
6VSS
APPLICATIONS
• Li-ion / Li polymer protector of over-charge, over-discharge, excess discharge-current, excess charge-current for battery pack
• High precision protectors for cell-phones and any other gadgets using on board Li-ion / Li polymer battery
Li-ion/polymer 1Cell Protector
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