Microchip MCP73855 Handleiding

Microchip Niet gecategoriseerd MCP73855

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2004-2013 Microchip Technology Inc. DS21915C-page 1
MCP73853/55
Features
• Linear Charge Management Controllers
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse Blocking Protection
• High-Accuracy Preset Voltage Regulation: + 0.5%
• Two Selectable Voltage Regulation Options:
- 4.1V, 4.2V
• Programmable Charge Current
• USB Compatible Charge Current Settings
• Programmable Safety Charge Timers
• Preconditioning of Deeply Depleted Cells
• Automatic End-of-Charge Control
• Optional Continuous Cell Temperature Monitoring
MCP73853
• Charge Status Output for Direct LED Drive
• Fault Output for Direct LED Drive
MCP73853
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging:
- 16-Lead, 4x4 mm QFN (MCP73853)
- 10-Lead, 3x3 mm DFN (MCP73855)
Applications
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants (PDAs)
• Cellular Telephones
• Hand-Held Instruments
• Cradle Chargers
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers
Description
The MCP7385X devices are highly-advanced, linear
charge management controllers, for use in space-
limited, cost-sensitive applications. The MCP73853
combines high-accuracy constant-voltage, constant-
current regulation, cell preconditioning, cell temperature
monitoring, advanced safety timers, automatic charge
termination, internal current sensing, reverse blocking
protection and charge status and fault indication in a
space-saving 16-lead, 4x4 QFN package.
The MCP73855 employs all the features of the
MCP73853, with the exception of the cell temperature
monitor and one status output. The MCP73855 is
offered in a space-saving 10-lead, 3x3 DFN package.
The MCP73853 and MCP73855 are designed
specifically for USB applications, adhering to all the
specifications governing the USB power bus.
The MCP7385X devices provide two selectable
voltage regulation options (4.1V or 4.2V) for use with
either coke or graphite anodes.
These devices have complete and fully-functional,
charge management solutions, operating with an input
voltage range of 4.5V to 5.5V. These are fully specified
over the ambient temperature range of -40°C to +85°C.
Package Types
2
MCP73853
4x4 QFN*
VDD2
VSS1
VSET VBAT3
VBAT2
PROG
VBAT1
THREF
THERM
TIMER
VSS3
STAT1
STAT2
EN
VSS2
VDD1 EP
16
1
15 14 13
3
4
12
11
10
9
5 6 7 8
17
MCP73855
3x3 DFN*
VDD1
VSET
VSS1
VBAT2
VBAT1
1
2
3
4
10
9
8
7VSS2
ENSTAT1
EP
11
56
PROG TIMER
*Exposed Pad (EP) is at VSS potential.
USB Compatible Li-Ion/Li-Polymer
Charge Management Controllers
MCP73853/55
DS21915C-page 2 2004-2013 Microchip Technology Inc.
Typical Application
Functional Block Diagram
EN
STAT1
VSET
VDD1
VSS
TIMER
PROG
VBAT1
VBAT2
+
–
Single
Lithium-Ion
Cell
3
2
MCP73855
5
6
4, 7
9
8
10
1
5V
4.7 µF
400 mA Lithium-Ion Battery Charger
4.7 µF
0.1 µF
+
–
Charge
Termination
Comparator
Voltage Control
Amplifier
+
–
UVLO
COMPARATOR
VUVLO
+
-
Temperature
Comparators
+
-
Bias and
Reference
Generator
VUVLO
VREF(1.2V)
Power-On
Delay
+
–
+
–
VREF
VREF
Oscillator
IREG/12
Constant-voltage/
Recharge Comp.
Precondition
Control
Charge_OK
Precon.
VDD
Charge Current
Control Amplifier
+
–
VREF
VREF
+
–
Precondition
Comp.
Charge Control,
Charge Timers,
and
Status Logic Drv Stat 2
Drv Stat 1
Charge_OK
IREG/12
VDD1
THERM
EN
TIMER
STAT1
STAT2
VBAT3
VSS1
PROG
VSET
THREF
VBAT1
90
110 k
10 k
10 k
100 k
50 k
50 k
G = 0.001
11 k
3 k
600 k
149 k
1.58 k
VDD2 VBAT2
300 k
10.3 k
4 k
Direction
Control
k
VSS2
VSS3
MCP73853 ONLY MCP73853 ONLY
2004-2013 Microchip Technology Inc. DS21915C-page 3
MCP73853/55
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
VDD1,2 .............................................................................6.5V
All Inputs and Outputs w.r.t. V
SS ..............-0.3 to (V
DD + 0.3)V
Maximum Junction Temperature, T
J............ Internally Limited
Storage temperature .....................................-65°C to +150°C
ESD protection on all pins:
Human Body Model (1.5k in Series with 100pF) 4 kV
Machine Model (200pF, No Series Resistance) ..........400V
*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 indicated, all limits apply for V
DD = [VREG(Typ) + 0.3V] to 5.5V,
TA = -40°C to 85°C. Typical values are at +25°C, VDD = [VREG (Typ) + 1.0V]
Parameters Sym Min Typ Max Units Conditions
Supply Input
Supply Voltage VDD 4.5 — 5.5 V
Supply Current ISS — 0.28 4 µA Disabled
— 0.83 4 mA Operating
UVLO Start Threshold VSTART 4.25 4.45 4.65 V VDD Low-to-High
UVLO Stop Threshold VSTOP 4.20 4.40 4.55 V VDD High-to-Low
Voltage Regulation (Constant-Voltage Mode)
Regulated Output Voltage VREG 4.079 4.1 4.121 V VSET = VSS
4.179 4.2 4.221 V VSET = VDD
VDD = [VREG(Typ) + 1V],
IOUT = 10 mA, TA = -5°C to +55°C
Line Regulation VBAT/
VBAT)| /VDD
— 0.020 0.25 %/V VDD = [VREG(Typ) + 1V] to 5.5V
IOUT = 10 mA
Load Regulation VBAT/VBAT| — 0.022 0.25 % IOUT = 10 mA to 150 mA
VDD = [VREG(Typ) + 1V]
Supply Ripple Attenuation PSRR — 50 — dB IOUT = 10 mA, 10 Hz to 1 kHz
— 26 — dB IOUT = 10 mA, 10 Hz to 10 kHz
— 24 — dB IOUT = 10 mA, 10 Hz to 1 MHz
Output Reverse-Leakage
Current
IDISCHARGE — 0.24 1 µA VDD < VBAT = VREG(Typ)
Current Regulation (Fast Charge Constant-Current Mode)
Fast Charge Current
Regulation
IREG 70 85 100 mA PROG = OPEN
325 400 475 mA PROG = VSS
TA = -5°C to +55°C
Preconditioning Current Regulation (Trickle Charge Constant-Current Mode)
Precondition Current
Regulation
IPREG 5 9 15 mA PROG = OPEN
25 40 75 mA PROG = VSS
TA = -5°C to +55°C
Precondition Threshold
Voltage
VPTH 2.70 2.80 2.90 V VSET = VSS
2.75 2.85 2.95 V VSET = VDD
VBAT Low-to-High

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MCP73855

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