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PDF MCP73831 Data sheet ( Hoja de datos )
| Número de pieza | MCP73831 | |
| Descripción | (MCP73831 / MCP73832) Li-Polymer Charge Management Controllers | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MCP73831 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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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
Applications:
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers
Typical Application
VIN
4.7 F
500 mA Li-Ion Battery Charger
4 VDD
VBAT 3
4.7 F
PROG 5
+ Single
-
Li-Ion
Cell
470
1 STAT
VSS 2
MCP73831
2 k
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.
Package Types
MCP73831/2
2×3 DFN*
MCP73831/2
SOT-23-5
VDD 1
8 PROG STAT 1
VDD 2 EP 7 NC
VBAT 3 9 6 VSS
VSS 2
VBAT 3
VBAT 4
5 STAT
5 PROG
4 VDD
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2005-2014 Microchip Technology Inc.
DS20001984G-page 1
1 page  
MCP73831/2
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [VREG(typical) + 0.3V] to 6V, TA = -40°C to +85°C.
Typical values are at +25°C, VDD = [VREG (typical) + 1.0V]
Parameters
Sym.
Min.
Typ.
Max.
Units
Conditions
Automatic Power Down
Exit Threshold
VPDEXIT
—
Thermal Shutdown
Die Temperature
Die Temperature
Hysteresis
TSD
TSDHYS
—
—
Note 1: Not production tested. Ensured by design.
VDD<(VBAT
+150 mV)
150
10
VDD<(VBAT
+200 mV)
—
—
3.5V VBAT VREG
VDD Rising
C
C
AC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [VREG (typical) + 0.3V] to 12V,
TA = -40°C to +85°C. Typical values are at +25°C, VDD = [VREG (typical) + 1.0V]
Parameters
Sym.
Min. Typ. Max. Units
Conditions
UVLO Start Delay
tSTART
Constant-Current Regulation
Transition Time Out of
Preconditioning
tDELAY
Current Rise Time Out of
Preconditioning
tRISE
Termination Comparator
Filter
tTERM
Charge Comparator Filter
Status Indicator
tCHARGE
Status Output turn-off
Status Output turn-on
tOFF
tON
——
5
——
1
——
1
0.4 1.3 3.2
0.4 1.3 3.2
— — 200
— — 200
ms VDD Low-to-High
ms VBAT < VPTH to VBAT > VPTH
ms IOUT Rising to 90% of IREG
ms Average IOUT Falling
ms Average VBAT
µs ISINK = 1 mA to 0 mA
µs ISINK = 0 mA to 1 mA
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [VREG (typical) + 0.3V] to 12V.
Typical values are at +25°C, VDD = [VREG (typical) + 1.0V]
Parameters
Sym. Min. Typ. Max. Units
Conditions
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
TA -40 — +85 °C
TJ -40 — +125 °C
TA -65 — +150 °C
5-Lead, SOT-23
JA — 230 — °C/W 4-Layer JC51-7 Standard
Board, Natural Convection
(Note 2)
8-Lead, 2 mm x 3 mm, DFN
JA — 76 — °C/W 4-Layer JC51-7 Standard
Board, Natural Convection
(Note 1)
Note 1: This represents the minimum copper condition on the PCB (Printed Circuit Board).
2: With large copper area on the PCB, the SOT-23-5 thermal resistance (JA) can reach a typical value of
130°C/W or better.
2005-2014 Microchip Technology Inc.
DS20001984G-page 5
5 Page 
MCP73831/2
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLES
Pin No.
DFN SOT-23-5
Symbol
Function
14
2—
33
4—
51
62
7—
85
9—
VDD
VDD
VBAT
VBAT
STAT
VSS
NC
PROG
EP
Battery Management Input Supply
Battery Management Input Supply
Battery Charge Control Output
Battery Charge Control Output
Charge Status Output
Battery Management 0V Reference
No Connection
Current Regulation Set and Charge Control Enable
Exposed Thermal Pad (EP); must be connected to VSS.
3.1 Battery Management Input Supply
(VDD)
A supply voltage of [VREG (typical) + 0.3V] to 6V is
recommended. Bypass to VSS with a minimum of
4.7 µF.
3.2 Battery Charge Control Output
(VBAT)
Connect to positive terminal of battery. Drain terminal
of internal P-channel MOSFET pass transistor. Bypass
to VSS with a minimum of 4.7 µF to ensure loop stability
when the battery is disconnected.
3.3 Charge Status Output (STAT)
STAT is an output for connection to an LED for charge
status indication. Alternatively, a pull-up resistor can be
applied for interfacing to a host microcontroller.
STAT is a tri-state logic output on the MCP73831 and
an open-drain output on the MCP73832.
3.4 Battery Management 0V Reference
(VSS)
Connect to negative terminal of battery and input
supply.
3.5 Current Regulation Set (PROG)
Preconditioning, fast charge and termination currents
are scaled by placing a resistor from PROG to VSS.
The charge management controller can be disabled by
allowing the PROG input to float.
3.6 Exposed Thermal Pad (EP)
An internal electrical connection exists between the
Exposed Thermal Pad (EP) and the VSS pin. They must
be connected to the same potential on the Printed
Circuit Board (PCB).
For better thermal performance, it is recommended to
add vias from the land area of EP to a copper layer on
the other side of the PCB.
2005-2014 Microchip Technology Inc.
DS20001984G-page 11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet MCP73831.PDF ] | |
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