ATmega16HVA Atmel Corporation, ATmega16HVA Datasheet - Page 136
ATmega16HVA
Manufacturer Part Number
ATmega16HVA
Description
Manufacturer
Atmel Corporation
Specifications of ATmega16HVA
Flash (kbytes)
16 Kbytes
Pin Count
28
Max. Operating Frequency
4 MHz
Cpu
8-bit AVR
# Of Touch Channels
3
Hardware Qtouch Acquisition
No
Max I/o Pins
6
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
6
Adc Resolution (bits)
12
Adc Speed (ksps)
1.9
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
256
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-20 to 85
I/o Supply Class
1.8 to 9.0
Operating Voltage (vcc)
1.8 to 9.0
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
4
Input Capture Channels
2
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATmega16HVA-4TU
Manufacturer:
Atmel
Quantity:
20
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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
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