ATEVK527 Atmel, ATEVK527 Datasheet - Page 7

no-image

ATEVK527

Manufacturer Part Number
ATEVK527
Description
KIT EVAL PWM AVR USB 4 SERIES
Manufacturer
Atmel
Series
AVR®r
Datasheet

Specifications of ATEVK527

Main Purpose
Power Management, Battery Charger
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
ATmega16U4, ATmega32U4
Primary Attributes
1 Cell- Li-Ion
Secondary Attributes
Graphical User Interface, USB Interface
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
3.3 VARTA™ battery
3.3.1 Typical Charge Characteristics
3.3.2 Typical Battery Characteristics
7801A-AVR-06/08
Battery specifications should always be verified from manufacturer’s data sheets.
Below is a summary of typical lithium-ion battery charge characteristics. Actual
parameters may vary.
Table 3-1. Typical Charge Characteristics
1. C corresponds to the typical Rated capacity value (see Table 3.2)
The table below summarises manufacturer’s data for the batteries types used in this
application. Other types of batteries may be used, but may require adjustments to
software and/or hardware.
Table 3-2. Manufacturer’s data for VARTA™ EasyPack range of lithium-ion batteries
1. RID: Battery internal resistor identifies the capacity of battery connected.
2. B value is used in temperature formula.
Parameter
Charge time
Charge current
Charge efficiency
Charge current threshold
Charge voltage
Charge voltage tolerance (per cell)
Temperature range
Humidity range
Parameter
Rated capacity (typical)
Nominal voltage
Operating voltage range
Charge voltage
Charge voltage tolerance
Charge current
Charge cut-off time
Charge cut-off current
RID
NTC
B-value
Overcharge detection
Overdischarge detection
1
(resistor ID)
2
EZPack
S-3.7V
550
520
3.9
10
3
EZPack
M-3.7V
750
720
6.8
14
3
2.75 … 4.20
3435
3.70
4.20
± 50
4.35
2.20
10
EZPack
L-3.7V
1000
955
19
10
3
Typical Value
XL-3.7V
EZPack
0 … +45 °C
65 ± 20 RH
2000
955
± 0.05 V
38
24
3 hours
0.03 C
99.9 %
4
4.20 V
1 C
AVR146
1
1
hours
mAh
Unit
mV
mA
mA
kΩ
kΩ
V
V
V
K
V
V
7

Related parts for ATEVK527