Instrukcja obsługi Microchip MCP73833

Microchip nieskategoryzowany MCP73833

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© 2009 Microchip Technology Inc. DS22005B-page 1
MCP73833/4
Features
• Complete Linear Charge Management Controller
- Integrated Pass Transistor
- Integrated Current Sense
- Integrated Reverse Discharge Protection
• Constant Current / Constant Voltage Operation
with Thermal Regulation
• High Accuracy Preset Voltage Regulation:
- 4.2V, 4.35V, 4.4V, or 4.5V, + 0.75%
• Programmable Charge Current: 1A Maximum
• Preconditioning of Deeply Depleted Cells
- Selectable Current Ratio
- Selectable Voltage Threshold
• Automatic End-of-Charge Control
- Selectable Current Threshold
- Selectable Safety Time Period
• Automatic Recharge
- Selectable Voltage Threshold
• Two Charge Status Outputs
• Cell Temperature Monitor
• Low-Dropout Linear Regulator Mode
• Automatic Power-Down when Input Power
Removed
• Under Voltage Lockout
• Numerous Selectable Options Available for a
Variety of Applications:
- Refer to Section 1.0 “Electrical
Characteristics” for Selectable Options
- Refer to the Product Identification System for
Standard Options
• Available Packages:
- DFN-10 (3 mm x 3 mm)
- MSOP-10
Applications
• Lithium-Ion / Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers
Description
The MCP73833/4 is a highly advanced linear charge
management controller for use in space-limited, cost
sensitive applications. The MCP73833/4 is available in
a 10-Lead, 3 mm x 3 mm DFN package or a 10-Lead,
MSOP package. Along with its small physical size, the
low number of external components required makes
the MCP73833/4 ideally suited for portable
applications. For applications charging from a USB
port, the MCP73833/4 can adhere to all the
specifications governing the USB power bus.
The MCP73833/4 employs a constant current/constant
voltage charge algorithm with selectable precondition-
ing and charge termination. The constant voltage
regulation is fixed with four available options: 4.20V,
4.35V, 4.40V, or 4.50V, to accomodate new, emerging
battery charging requirements. The constant current
value is set with one external resistor. The MCP73833/
4 limits 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 set to 100%. Refer to Section 1.0 “Electrical
Characteristics” for available options and the
“Product Indentification System” for standard
options.
The MCP73833/4 is fully specified over the ambient
temperature range of -40°C to +85°C.
Package Types
DFN-10
MSOP-10
VDD
STAT1
STAT2
VSS
VBAT
THERM
PG(TE)
PROG
2
3
4
5
9
8
7
6
VDD VBAT
1 10
STAT1
V
DD
STAT2
V
BAT
THERM
1
2
3
4
10
9
8
7PG
(TE)
V
BAT
V
DD
EP
11
56PROG
V
SS
Stand-Alone Linear Li-Ion / Li-Polymer Charge
Management Controller
MCP73833/4
DS22005B-page 2 © 2009 Microchip Technology Inc.
Typical Application
Functional Block Diagram
STAT1
VDD
VSS
PROG
VBAT +
-
Single
Li-Ion
Cell
1,2
MCP73833
6
9,10
7
1 µF
1A Li-Ion Battery Charger
5
VIN
470Ω
470Ω
470Ω
STAT2
PG
THERM
T
4
3 8
1 µF
1 kΩ10 kΩ
+
-
Reference
Generator
VREF (1.21V)
VDD
STAT1
PROG
VBAT
G=0.001
VSS
Direction
Control
54 kΩ
121 kΩUVLO
+
-
PRECONDITION
6 µA
+
-
TERMINATIO N
+
-
111 kΩ
+
-
CA
10 kΩ
157.3 kΩ
6 kΩ
48 kΩ
470.6 kΩ
CHARG E
+
-
+
-
VA
72.7 kΩ
310 kΩ
6 µA
G=0.001 1 kΩ
+
-
CURRENT
LIMIT
10 µA
+
-LTVT
+
-HTVT470.6kΩ
121 kΩ
THERM
50 µA
Charge
Control,
Timer,
and
Status
Logic
STAT2
PG (TE)
+
-
LDO
1 MΩ
175 kΩSHDN
© 2009 Microchip Technology Inc. DS22005B-page 3
MCP73833/4
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings
VDD........................................................................ 7.0V
All Inputs and Outputs w.r.t. VSS .....-0.3 to (VDD+0.3)V
Maximum Junction Temperature, TJ. Internally Limited
Storage temperature ..........................-65°C to +150°C
ESD protection on all pins:
Human Body Model (HBM)
(1.5 kΩ in Series with 100 pF)............................... ≥ 4 kV
Machine Model (MM)
(200 pF, No Series Resistance) ...........................300V
*Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational listings of this specification
is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits apply for V
DD= [VREG(Typical)+0.3V] to 6V, T
A=-40°C to 85°C.
Typical values are at +25°C, V
DD= [VREG(Typical)+1.0V]
Parameters Sym Min Typ Max Units Conditions
Supply Input
Supply Voltage VDD 3.75 — 6 V Charging
VREG(Typ-
ical)+0.3V
— 6 V Charge Complete, Standby
Supply Current ISS — 2000 3000 µA Charging
— 150 300 µA Charge Complete
— 100 300 µA Standby (No Battery or PROG
Floating)
— 50 100 µA Shutdown (VDD < VBAT, or
VDD < VSTOP
)
UVLO Start Threshold VSTART 3.4 3.55 3.7 V VDD Low-to-High
UVLO Stop Threshold VSTOP 3.3 3.45 3.6 V VDD High-to-Low
UVLO Hysteresis VHYS — 100 — mV
Voltage Regulation (Constant Voltage Mode, System Test Mode)
Regulated Output Voltage V
REG 4.168 4.20 4.232 V VDD=[VREG(Typical)+1V]
4.318 4.35 4.382 V IOUT=10 mA
4.367 4.40 4.433 V TA
=-5°C to +55°C
4.467 4.50 4.533 V
Line Regulation |(ΔVBAT/VBAT)
/ VΔDD|
— 0.10 0.30 %/V VDD=[VREG(Typical)+1V] to
6V, IOUT=10 mA
Load Regulation |ΔVBAT/ VBAT| — 0.10 0.30 % IOUT=10 mA to 100 mA
VDD=[VREG(Typical)+1V]
Supply Ripple Attenuation PSRR — 58 — dB I
OUT=10 mA, 10Hz to 1 kHz
— 47 — dB IOUT=10 mA, 10Hz to 10 kHz
— 25 — dB IOUT=10 mA, 10Hz to 1 MHz
Current Regulation (Fast Charge Constant Current Mode)
Fast Charge Current Regulation I
REG 90 100 110 mA PROG = 10 kΩ
900 1000 1100 mA PROG = 1.0 kΩ
TA
=-5°C to +55°C
Maximum Output Current Limit I
MAX — 1200 — mA PROG < 833Ω

Specyfikacje produktu

Marka: Microchip
Kategoria: nieskategoryzowany
Model: MCP73833

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