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Battery Protection. R5437L303CA Datasheet

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Battery Protection. R5437L303CA Datasheet






R5437L303CA Protection. Datasheet pdf. Equivalent




R5437L303CA Protection. Datasheet pdf. Equivalent





Part

R5437L303CA

Description

1 to 3 Cells Li-Ion Battery Protection

Manufacture

RICOH

Datasheet
Download R5437L303CA Datasheet


RICOH R5437L303CA

R5437L303CA; R5437L Series 1 to 3 Cells Li-Ion Batter y Protection IC for Secondary Protectio n No. EA-416-210518 OUTLINE The R5437L is an overcharge protection IC for 1 to 3 serial cells Li-ion / Li-polymer rec hargeable battery. This device provides the high-accuracy voltage detection fu nction and the shutdown function can re duce the supply current to the minimum when all cell’s vo.


RICOH R5437L303CA

ltage becomes less than the shutdown det ection voltage. FEATURES  High Volta ge Tolerant Process Absolute Maximum Ra tings ················ ·················· 2 6 V  Low Supply Current During Opera tion, Cell-voltage: 3.9 V, 3-Cells ·· ·········· Typ. 0.85 µA  High-accuracy Voltage Detection Overcha rge Detector Threshold (VDET1n(1))················· 4.10 V to 4.65 V, in.


RICOH R5437L303CA

5 mV step Overcharge Detector Threshold Accuracy ·············· ·· ± 0.02 V (Ta = 25°C) ± 0.025 V (0°C ≤ Ta ≤ 60°C) Overcharge Rel ease Voltage (VREL1n(1))······· ············· VDET1n−0V to VDET1n−0.5V, in 50 mV step Overch arge Detection Delay Time ······ ··················· · 2-, 4-, or 6-sec with Delay Time Shortening Function(2) Overcharge Release Voltage Condition .



Part

R5437L303CA

Description

1 to 3 Cells Li-Ion Battery Protection

Manufacture

RICOH

Datasheet
Download R5437L303CA Datasheet




 R5437L303CA
R5437L Series
1 to 3 Cells Li-Ion Battery Protection IC for Secondary Protection
No. EA-416-210518
OUTLINE
The R5437L is an overcharge protection IC for 1 to 3 serial cells Li-ion / Li-polymer rechargeable battery. This
device provides the high-accuracy voltage detection function and the shutdown function can reduce the
supply current to the minimum when all cell’s voltage becomes less than the shutdown detection voltage.
FEATURES
High Voltage Tolerant Process
Absolute Maximum Ratings ··································· 26 V
Low Supply Current
During Operation, Cell-voltage: 3.9 V, 3-Cells ············ Typ. 0.85 µA
High-accuracy Voltage Detection
Overcharge Detector Threshold (VDET1n(1))················· 4.10 V to 4.65 V, in 5 mV step
Overcharge Detector Threshold Accuracy ················· ± 0.02 V (Ta = 25°C)
± 0.025 V (0°C Ta 60°C)
Overcharge Release Voltage (VREL1n(1))····················· VDET1n0V to VDET1n0.5V, in 50 mV step
Overcharge Detection Delay Time ··························· 2-, 4-, or 6-sec with Delay Time Shortening Function(2)
Overcharge Release Voltage Condition ···················· Voltage Release Type
COUT Output (CMOS Output, Active-high) ················ Typ. 4.7 V
Shutdown Functions
Shutdown Detector Threshold ································ Typ. 3.5 V ±0.3 V
Shutdown Current················································ Max.0.1µA
1 to 3 Cells Selectable Battery Protection
Compact Package
DFN 1814-6C ····················································· 1.4mm x 1.8mm
APPLICATIONS
Li-Ion or Li-Polymer Battery Protection
(1) VDET1n, VREL1n : n =1, 2, 3
(2) The delay time can be reduced down to approx. 1/90 by applying a 4 V ± 0.2 V to the VDD VC1 pins.
1





 R5437L303CA
SELECTION GUIDE
The overcharge and the delay time are user-selectable options.
Selection Guide
Product Name
R5437Lxxx$-TR
Package
DFN1814-6C
Quantity per Reel
5,000 pcs
Pb Free
Yes
R5437L
No. EA-416-210518
Halogen Free
Yes
xxx: Specify the combination of the overcharge detector threshold (VDET1n) and the overcharge release
voltage (VREL1n) (1).
VDET1n(2): 4.10 V to 4.65 V in 5 mV step
VREL1n(2): VDET1n – 0 V to VDET1n – 0.5 V in 50 mV step
$: Specify the combination of the overcharge detection delay time (tVDET1) and the overcharge release
delay time (tVREL1). Refer to Delay Time Code Table for details.
Delay Time Code Table
Code tVDET1 (s) tVREL1 (ms)
A
2
16
B
4
16
C
6
16
: Specify the function code.
Function Code Table
Code Overcharge Released Condition
A
Voltage Release
COUT Output
CMOS
“H” Active
(1) Refer to Product Code Table for details.
(2) VDET1n, VREL1n: n = 1, 2, 3
2





 R5437L303CA
BLOCK DIAGRAM
VDD
R5437L
No. EA-416-210518
VC1
VC2
VC3
VSS
VD1-1
Shutdown
VD1-2
VD1-3
Shutdown
Shutdown
Logic
Circuit
VR
Regulator
VR
Logic
Circuit
Oscillator
Counter
VR
COUT
R5437L Block Diagram
3



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