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DEV-11520

Description
FIO V3 ATMEGA32U4
CategoryDevelopment board/suite/development tools   
File Size823KB,28 Pages
ManufacturerSparkFun Electronics
Environmental Compliance
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DEV-11520 Overview

FIO V3 ATMEGA32U4

DEV-11520 Parametric

Parameter NameAttribute value
Board typeEvaluation platform
typeMCU 8-bit
core processorAVR
operating system-
platformPro Micro
Supporting products/related productsATmega32U4
Installation typefixed
contentplate
MCP73831/2
Miniature Single-Cell, Fully Integrated Li-Ion,
Li-Polymer Charge Management Controllers
Features:
• Linear Charge Management Controller:
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse Discharge Protection
• High Accuracy Preset Voltage Regulation: + 0.75%
• Four Voltage Regulation Options:
- 4.20V, 4.35V, 4.40V, 4.50V
• Programmable Charge Current: 15 mA to 500 mA
• Selectable Preconditioning:
- 10%, 20%, 40%, or Disable
• Selectable End-of-Charge Control:
- 5%, 7.5%, 10%, or 20%
• Charge Status Output
- Tri-State Output - MCP73831
- Open-Drain Output - MCP73832
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging:
- 8-Lead, 2 mm x 3 mm DFN
- 5-Lead, SOT-23
Description:
The MCP73831/2 devices are highly advanced linear
charge management controllers for use in space-
limited, cost-sensitive applications. The MCP73831/2
are available in an 8-Lead, 2 mm x 3 mm DFN package
or a 5-Lead, SOT-23 package. Along with their small
physical size, the low number of external components
required make the MCP73831/2 ideally suited for
portable applications. For applications charging from a
USB port, the MCP73831/2 adhere to all the
specifications governing the USB power bus.
The MCP73831/2 employ a constant-current/constant-
voltage
charge
algorithm
with
selectable
preconditioning and charge termination. The constant
voltage regulation is fixed with four available options:
4.20V, 4.35V, 4.40V or 4.50V, to accommodate new,
emerging battery charging requirements. The constant
current value is set with one external resistor. The
MCP73831/2 devices limit the charge current based on
die temperature during high power or high ambient
conditions. This thermal regulation optimizes the
charge cycle time while maintaining device reliability.
Several options are available for the preconditioning
threshold, preconditioning current value, charge
termination value and automatic recharge threshold.
The preconditioning value and charge termination
value are set as a ratio or percentage of the
programmed constant current value. Preconditioning
can be disabled. Refer to
Section 1.0 “Electrical
Characteristics”
for available options and the
Product Identification System
for standard options.
The MCP73831/2 devices are fully specified over the
ambient temperature range of -40°C to +85°C.
Applications:
Lithium-Ion/Lithium-Polymer Battery Chargers
Personal Data Assistants
Cellular Telephones
Digital Cameras
MP3 Players
Bluetooth Headsets
USB Chargers
Package Types
MCP73831/2
2×3 DFN*
V
DD
1
8 PROG
EP
9
7 NC
6 V
SS
5 STAT
Typical Application
V
IN
4.7
F
500 mA Li-Ion Battery Charger
4 V
DD
V
BAT
3
4.7
F
PROG
470
1
5
2 k
+ Single
Li-Ion
- Cell
MCP73831/2
SOT-23-5
STAT 1
V
SS
2
V
BAT
3
4 V
DD
5 PROG
V
DD
2
V
BAT
3
V
BAT
4
STAT
V
SS
2
* Includes Exposed Thermal Pad (EP); see
Table 3-1.
MCP73831
2005-2014 Microchip Technology Inc.
DS20001984G-page 1

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