ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 5

• 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

2. Overview
Figure 2-1.
8042B–AVR–06/10
RESET/dW
RESET/dW
VFET
VFET
VREG
VREG
BATT
BATT
GND
GND
VCC
VCC
Block Diagram
Supervision
Supervision
Charger
Charger
Generation
Generation
Watchdog
Watchdog
Watchdog
Watchdog
Detect
Detect
Oscillator
Oscillator
Oscillator
Oscillator
Circuits /
Circuits /
RESET
RESET
POR &
POR &
Power
Power
Timer
Timer
Clock
Clock
Regulator
Regulator
Voltage
Voltage
The ATmega16HVB/32HVB is a monitoring and protection circuit for 3 and 4-cell Li-ion applica-
tions with focus on highest safety including safe authentication, low cost and high utilization of
the cell energy. The device contains secure authentication features as well as autonomous bat-
tery protection during charging and discharging. The External Protection Input can be used to
implement other battery protection mechanisms using external components, e.g. protection
against chargers with too high charge voltage can be easily implemented with a few low cost
passive components. The feature set makes the ATmega16HVB/32HVB a key component in
any system focusing on high security, battery protection, high system utilization and low cost.
ATmega16HVB/32HVB provides the necessary redundancy on-chip to make sure that the bat-
tery is protected in critical failure modes. The chip is specifically designed to provide safety for
the battery cells in case of pin shorting, loss of power (either caused by battery pack short or
VCC short), illegal charger connection or software runaway. This makes ATmega16HVB/32HVB
the ideal 1-chip solution for applications with focus on high safety.
The ATmega16HVB/32HVB features an integrated voltage regulator that operates at a wide
range of input voltages, 4 - 25 volts. This voltage is regulated to a constant supply voltage of
nominally 3.3 volts for the integrated logic and analog functions. The regulator capabilities, com-
debugWIRE
debugWIRE
Oscillator
Oscillator
Sampling
Sampling
Program
Program
Interface
Interface
Logic
Logic
PB0
PB0
Voltage Regulator
Voltage Regulator
Monitor Interface
Monitor Interface
PORTB (8)
PORTB (8)
PB7..0
PB7..0
Flash
Flash
SPI
SPI
CPU
CPU
DATA BUS
DATA BUS
PORTC (6)
PORTC (6)
PC5..0
PC5..0
SRAM
SRAM
TWI
TWI
8/16-bit T/C0
8/16-bit T/C0
8/16-bit T/C1
8/16-bit T/C1
EEPROM
EEPROM
Security
Security
Module
Module
PORTA (4)
PORTA (4)
PA3..0
PA3..0
ATmega16HVB/32HVB
PA1..0
PA1..0
Counter ADC
Counter ADC
Protection
Protection
Balancing
Balancing
Reference
Reference
Control
Control
Current
Current
Coulomb
Coulomb
Voltage
Voltage
Voltage
Voltage
FET
FET
ADC
ADC
Cell
Cell
VPTAT
VPTAT
PV4
PV4
PV3
PV3
PV2
PV2
PV1
PV1
NV
NV
VREF
VREF
VREFGND
VREFGND
PI
PI
NI
NI
PPI
PPI
NNI
NNI
OC
OC
OD
OD
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