ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 135

• Manufacturer Part Number: ATAVRSB202
• Description: KIT BATT MGMT FOR ATMEGA32HVB
• Manufacturer: Atmel

Specifications of ATAVRSB202

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24. Battery Protection
24.1
24.2
Table 24-1.
8042B–AVR–06/10
Battery Protection Type
Short-circuit Protection
Discharge Over-current
Protection
Charge Over-current
Protection
Discharge High-current
Protection
Charge High-current
Protection
External Protection Input
Features
Overview
Effect of Battery Protection Types
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•
•
•
•
•
•
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The Current Battery Protection circuitry (CBP) monitors the charge and discharge current and
disables C-FET and D-FET if a Short-circuit, Over-current or High-current condition is detected.
There are five different programmable detection levels: Short-circuit Detection Level, Discharge
Over-current Detection Level, Charge Over-current Detection Level, Discharge High-current
Detection Level, Charge High-current Detection Level. There are three different programmable
delays for activating Current Battery Protection: Short-circuit Reaction Time, Over-current Reac-
tion Time and High-current Reaction Time. After Current Battery Protection has been activated,
the application software must re-enable the FETs. The Battery Protection hardware provides a
hold-off time of 1 second before software can re-enable the FETs. This provides safety in case
the application software should unintentionally try to re-enable the FETs too early.
The activation of a protection also issues an interrupt to the CPU. The battery protection inter-
rupts can be individually enabled and disabled by the CPU.
In addition, the module offers an External Protection Input. The activation of the External Protec-
tion Input operates independently of the rest of the battery protection mechanisms. The
activation/deactivation of this protection is instantaneously controlled from the External Protec-
tion Input port, and will not deactivate or affect the other battery protection mechanisms.
The effect of the various battery protection types are given in
Short-circuit Protection
Discharge Over-current Protection
Charge Over-current Protection
Discharge High-current Protection
Charge High-current Protection
External Protection Input
Programmable and Lockable Detection Levels and Reaction Times
Autonomous Operation Independent of CPU
Interrupt Requests
Entry and/or Exit
Entry
Entry
Entry
Entry
Entry
Operational
Operational
Operational
Operational
Operational
Operational
PC-FET
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
C-FET
ATmega16HVB/32HVB
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
D-FET
Table
Cell Balancing
Operational
Operational
Operational
Operational
Operational
Operational
24-1.
FETs
Operational
Operational
Operational
Operational
Operational
Operational
MCU
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