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RICOH

R5438L303BA Datasheet Preview

R5438L303BA Datasheet

1 to 3 Cells Li-Ion Battery Protection

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R5438L Series
1 to 3 Cells Li-Ion Battery Protection IC for Secondary Protection
No. EA-417-210518
OUTLINE
The R5438L 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 ··························· 1-, 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
DFN1814-6C ······················································ 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




RICOH

R5438L303BA Datasheet Preview

R5438L303BA Datasheet

1 to 3 Cells Li-Ion Battery Protection

No Preview Available !

SELECTION GUIDE
The overcharge and the delay time are user-selectable options.
Selection Guide
Product Name
R5438Lxxx$-TR
Package
DFN1814-6C
Quantity per Reel
5,000 pcs
Pb Free
Yes
R5438L
No. EA-417-210518
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
D
1
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


Part Number R5438L303BA
Description 1 to 3 Cells Li-Ion Battery Protection
Maker RICOH
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