2024年6月3日发(作者：干谷菱)
R5438L315AA
PRODUCT SPECIFICATIONS
R5438L315AA-TR
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 Chart
[10] Package Dimensions
[11] Mark Specification
-1/12-
R5438L315AA
[1] Outline
R5438L315AA are CMOS-based high voltage tolerant over-charge protection ICs for Li-ion/Li-polymer
secondary battery. The R5438L315AA can detect overcharge of 1-cell to 3-cell Li-ion/ Li-polymer batteries. The
R5438L315AA is consists of 3 voltage detectors, a voltage reference unit, an oscillator, a counter, a delay circuit,
a logic circuit.
When the over-charge is detected, after the IC internally fixed delay time, the output of C
OUT
becomes "H".
After detecting over-charge, when the cell voltage becomes lower than the over-charge released voltage, the
over-charge state is released.
If all the cells voltages become equal or less than the shutdown detector threshold, all the circuits are halted
and shut down, as a result, the consumption current of IC itself (Shutdown current) is extremely reduced.
The output type is CMOS.
[2] Block Diagram
VDD
VC1
VD1-1
VR
Shutdown
Logic
Circuit
Regulator
VC2
VD1-2
VR
Logic
Circuit
Shutdown
VR
VC3
VD1-3
Oscillator
Cout
ShutdownCounter
VSS
-2/12-
2024年6月3日发(作者：干谷菱)
R5438L315AA
PRODUCT SPECIFICATIONS
R5438L315AA-TR
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 Chart
[10] Package Dimensions
[11] Mark Specification
-1/12-
R5438L315AA
[1] Outline
R5438L315AA are CMOS-based high voltage tolerant over-charge protection ICs for Li-ion/Li-polymer
secondary battery. The R5438L315AA can detect overcharge of 1-cell to 3-cell Li-ion/ Li-polymer batteries. The
R5438L315AA is consists of 3 voltage detectors, a voltage reference unit, an oscillator, a counter, a delay circuit,
a logic circuit.
When the over-charge is detected, after the IC internally fixed delay time, the output of C
OUT
becomes "H".
After detecting over-charge, when the cell voltage becomes lower than the over-charge released voltage, the
over-charge state is released.
If all the cells voltages become equal or less than the shutdown detector threshold, all the circuits are halted
and shut down, as a result, the consumption current of IC itself (Shutdown current) is extremely reduced.
The output type is CMOS.
[2] Block Diagram
VDD
VC1
VD1-1
VR
Shutdown
Logic
Circuit
Regulator
VC2
VD1-2
VR
Logic
Circuit
Shutdown
VR
VC3
VD1-3
Oscillator
Cout
ShutdownCounter
VSS
-2/12-