ATMEGA16HVA-4CKU Atmel, ATMEGA16HVA-4CKU Datasheet - Page 136

• Manufacturer Part Number: ATMEGA16HVA-4CKU
• Description: MCU AVR 16K FLASH 4MHZ 36-LGA
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16HVA-4CKU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 7
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 9 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 36-LGA
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRSB200, ATAVRSB201
• Minimum Operating Temperature: - 20 C
• On-chip Adc: 12 bit, 5 Channel
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24.2
24.2.1
24.2.2
136
FET Driver
ATmega8HVA/16HVA
Features
Overview
•
•
The ATmega8HVA/16HVA includes a FET Driver. The FET Driver is designed for driving N-
channel FETs used as high side switch in 1- or 2-Cell Li-Ion battery pack. A block diagram of the
FET driver is shown in
When charging deeply over-discharged cells, the FET Driver will be operated in Deep Under-
Voltage Recovery (DUVR) mode. In DUVR mode the FET Driver regulates the voltage at the
VFET pin to typically 2.0 Volts in 1-Cell applications and typically 4.0 Volts in 2-Cell applications.
This is done by operating the Charge FET at a point where the drain-source voltage is equal to
the voltage difference between the cell voltage and the required VFET operating voltage. As the
cell voltage increases, the drain-source voltage of the Charge FET will decrease until the
Charge FET is completely on. See
In normal operation (DUVRD = 1), the Charge FET/Discharge FET is switched on by pumping
OC/OD sufficiently above the VFET supply voltage. To turn off the Charge FET/Discharge FET,
OC/OD is pulled quickly low. See
details.
Figure 24-2. FET Driver block diagram.
Charge-pump for generating suitable gate drive for N-Channel FET switch on high side
Deep Under-voltage Recovery mode that allows normal operation while charging a Deeply Over-
discharged battery from 0-volt
BANDGAP
CONTROL
_VREG
LDO
REF.
FET
CLK
Figure 24-2 on page
DUVRD
CHARGE_EN
DISCHARGE_EN
CLK_OSC
DVDD
DUALC_MODE
VREF
Table 29-5 on page 170
Figure 24-3 on page 137
Charge
C-FET
Pump
14V clamp
136.
Charge FET
Charge
D-FET
1k
Pump
NFET DRIVER
Discharge FET
1k
for details.
14V clamp
and
Table 29-5 on page 170
BATT+
BATT-
8024A–AVR–04/08
for