Microchip MCP73853T Usb compatible li-ion/li-polymer charge management controller Datasheet

MCP73853/55
USB Compatible Li-Ion/Li-Polymer
Charge Management Controllers
Features
Description
• 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)
The MCP7385X devices are highly advanced linear
charge management controllers for use in spacelimited, cost-sensitive applications. The MCP73853
combines high-accuracy constant-voltage, constantcurrent 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, 4 x 4 QFN package.
The MCP7385X devices provide complete, fullyfunctional, charge management solutions, operating
with an input voltage range of 4.5V to 5.5V.
The MCP7385X devices are fully specified over the
ambient temperature range of -40°C to +85°C.
EN
VSS2
16-Pin QFN
STAT2
Package Types
16
15
14
13
VSET 1
12 VBAT3
VDD1 2
11 VBAT2
MCP73853
VDD2 3
10 VBAT1
VSS1 4
6
7
8
THERM
TIMER
10-Pin DFN
9 VSS3
5
THREF
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
The MCP7385X devices provide two selectable voltage
regulation options (4.1V or 4.2V) for use with either
coke or graphite anodes.
STAT1
•
•
•
•
•
•
•
•
•
The MCP73853 and MCP73855 are designed
specifically for USB applications, adhering to all the
specifications governing the USB power bus.
PROG
Applications
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, 3 x 3 DFN package.
STAT1 1
9 VBAT2
VDD1 3 MCP73855
8 VBAT1
VSS1 4
7 VSS2
PROG 5
 2004 Microchip Technology Inc.
10 EN
VSET 2
6 TIMER
DS21915A-page 1
MCP73853/55
Typical Application
400 mA Lithium-Ion Battery Charger
5V
4.7 µF
3
VDD1
2
VSET
10
1
VBAT1 8
9
V
EN
STAT1
PROG
+ Single
– Lithium-Ion
Cell
6
TIMER
5
4.7 µF
BAT2
0.1 µF
4, 7
VSS
MCP73855
Functional Block Diagram
Direction
Control
VDD1
VBAT1
VDD2
VBAT2
VDD
G = 0.001
4 kΩ
VREF
PROG
90
kΩ
Charge Current
Control Amplifier
Voltage Control
Amplifier
+
–
110 kΩ
Charge
Termination 10 kΩ
Comparator
+
IREG/12
–
10 kΩ
+
–
VREF
+
11 kΩ
VREF
Precondition
Control
Charge_OK
Precon
UVLO
COMPARATOR
VBAT3
Precondition
Comp.
600 kΩ
–
+
3 kΩ
149 kΩ
–
Constant-voltage/
Recharge Comp.
VUVLO
+
–
EN
Power-On
Delay
1.58 kΩ
VREF
300 kΩ
Bias and
Reference
Generator
VUVLO
VREF(1.2V)
VSET
10.3 kΩ
THREF
100 kΩ
+
-
THERM
Temperature
Comparators
50 kΩ
+
-
TIMER
STAT1
IREG/12
Oscillator
50 kΩ
MCP73853 ONLY
VSS1
VSS2
VSS3
Drv Stat 1
Charge Control,
Charge Timers,
and
Status Logic
Drv Stat 2
STAT2
MCP73853 ONLY
Charge_OK
DS21915A-page 2
 2004 Microchip Technology Inc.
MCP73853/55
1.0
ELECTRICAL
CHARACTERISTICS
*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.
Absolute Maximum Ratings*
VDD1,2...............................................................................6.5V
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 (1.5kW in Series with 100pF) ....≥ 4 kV
Machine Model (200pF, No Series Resistance) ..........400V
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [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
Supply Voltage
VDD
Supply Current
ISS
UVLO Start Threshold
VSTART
UVLO Stop Threshold
VSTOP
4.20
Units
Conditions
4.5
—
5.5
V
—
0.28
4
µA
—
0.83
4
mA
4.25
4.45
4.65
V
VDD Low-to-High
4.40
4.55
V
VDD High-to-Low
4.079
4.1
4.121
V
VSET = VSS
4.179
4.2
4.221
V
VSET = VDD
Supply Input
Disabled
Operating
Voltage Regulation (Constant-Voltage Mode)
Regulated Output Voltage
VREG
VDD = [VREG(Typ) + 1V],
IOUT = 10 mA, TA = -5°C to +55°C
Line Regulation
|(∆VBAT/
VBAT)| /∆VDD
—
0.020
0.25
Load Regulation
|∆VBAT/VBAT|
—
0.022
0.25
%
IOUT = 10 mA to 150 mA
VDD = [VREG(Typ) + 1V]
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
—
0.24
1
µA
VDD < VBAT = VREG(Typ)
Supply Ripple Attenuation
Output Reverse-Leakage
Current
IDISCHARGE
%/V VDD = [VREG(Typ) + 1V] to 5.5V
IOUT = 10 mA
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
2.75
2.85
2.95
V
VSET = VSS
VSET = VDD
VBAT Low-to-High
 2004 Microchip Technology Inc.
DS21915A-page 3
MCP73853/55
DC CHARACTERISTICS (Continued)
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [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
ITERM
3.7
6.5
9.3
mA
18
32
46
mA
Conditions
Charge Termination
Charge Termination Current
PROG = OPEN
PROG = VSS
TA = -5°C to +55°C
Automatic Recharge
Recharge Threshold Voltage
VRTH
VREG – VREG – VREG –
300mV 200mV 100mV
V
VBAT High-to-Low
TA = 25°C, VDD = VREG(Typ) + 1V,
ITHREF = 0 mA
Thermistor Reference - MCP73853
Thermistor Reference
Output Voltage
VTHREF
2.475
2.55
2.625
V
Thermistor Reference
Source Current
ITHREF
200
—
—
µA
|(∆VTHREF/
—
0.05
0.25
0.02
0.10
Thermistor Reference Line
Regulation
VTHREF)|/∆VDD
Thermistor Reference Load
Regulation
|∆VTHREF/
VTHREF|
%/V VDD = [VREG (Typ) + 1V] to 5.5V
%
ITHREF = 0 mA to 0.20 mA
Thermistor Comparator - MCP73853
Upper Trip Threshold
Upper Trip Point Hysteresis
VT1
1.18
1.25
1.32
V
VT1HYS
—
-50
—
mV
VT2
0.59
0.62
0.66
V
VT2HYS
—
80
—
mV
IBIAS
—
—
2
µA
Lower Trip Threshold
Lower Trip Point Hysteresis
Input Bias Current
Status Indicator – STAT1, STAT2
Sink Current
ISINK
4
8
12
mA
Low Output Voltage
VOL
—
200
400
mV
ISINK = 1 mA
ILK
—
0.01
1
µA
ISINK = 0 mA, VSTAT1,2 = 5.5V
Input High Voltage Level
VIH
1.4
—
—
V
Input Low Voltage Level
VIL
—
—
0.8
V
Input Leakage Current
ILK
—
0.01
1
µA
TSD
—
155
—
°C
TSDHYS
—
10
—
°C
Input Leakage Current
Enable Input
VENABLE = 5.5V
Thermal Shutdown
Die Temperature
Die Temperature Hysteresis
DS21915A-page 4
 2004 Microchip Technology Inc.
MCP73853/55
AC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [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
tSTART
—
—
5
ms
VDD Low-to-High
tDELAY
—
—
1
ms
VBAT < VPTH to VBAT > VPTH
Current Rise Time Out of
Preconditioning
tRISE
—
—
1
ms
IOUT Rising to 90% of IREG
Fast Charge Safety Timer
Period
tFAST
1.1
1.5
1.9
Hours
tPRECON
45
60
75
tTERM
2.2
3
3.8
Hours
Status Output turn-off
tOFF
—
—
200
µs
ISINK = 1 mA to 0 mA
Status Output turn-on
tON
—
—
200
µs
ISINK = 0 mA to 1 mA
UVLO Start Delay
Conditions
Current Regulation
Transition Time Out of
Preconditioning
CTIMER = 0.1 µF
Preconditioning Current Regulation
Preconditioning Charge
Safety Timer Period
Minutes CTIMER = 0.1 µF
Charge Termination
Elapsed Time Termination
Period
CTIMER = 0.1 µF
Status Indicators
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [VREG (Typ) + 0.3V] to 5.5.
Typical values are at +25°C, VDD = [VREG (Typ) + 1.0V]
Parameters
Sym
Min
Typ
Max
Units
Conditions
Temperature Ranges
Specified Temperature Range
TA
-40
—
+85
°C
Operating Temperature Range
TJ
-40
—
+125
°C
Storage Temperature Range
TA
-65
—
+150
°C
Thermal Resistance, 16-L, 4mm x 4mm QFN
θJA
—
37
—
°C/W
4-Layer JC51-7
Standard Board,
Natural Convection
Thermal Resistance, 10-L, 3mm x 3mm DFN
θJA
—
51
—
°C/W
4-Layer JC51-7
Standard Board,
Natural Convection
Thermal Package Resistances
 2004 Microchip Technology Inc.
DS21915A-page 5
MCP73853/55
2.0
TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
NOTE: Unless otherwise indicated, VDD = [VREG(Typ) + 1V], IOUT = 10 mA and TA= +25°C.
1.00
4.250
VSET = VDD
VDD = 5.2 V
0.80
ISS (mA)
VBAT (V)
4.230
VSET = VDD
VDD = 5.2 V
0.90
4.210
4.190
0.70
0.60
0.50
0.40
4.170
0.30
0.20
4.150
0
50
100
150 200 250 300
350
0
400
50
100
FIGURE 2-1:
Battery Regulation Voltage
(VBAT) vs. Charge Current (IOUT).
1.00
300
350
400
VSET = VDD
IOUT = 375 mA
0.90
0.80
ISS (mA)
VBAT (V)
250
FIGURE 2-4:
Supply Current (ISS) vs.
Charge Current (IOUT).
VSET = VDD
IOUT = 375 mA
4.230
200
IOUT (mA)
IOUT (mA)
4.250
150
4.210
4.190
0.70
0.60
0.50
0.40
4.170
0.30
4.150
0.20
4.5
4.7
4.9
5.1
5.3
4.5
5.5
4.7
FIGURE 2-2:
Battery Regulation Voltage
(VBAT) vs. Supply Voltage (VDD).
1.00
5.5
VSET = VDD
IOUT = 10 mA
0.90
0.80
ISS (mA)
VBAT (V)
5.3
FIGURE 2-5:
Supply Current (ISS) vs.
Supply Voltage (VDD).
VSET = VDD
IOUT = 10 mA
4.230
5.1
VDD (V)
VDD (V)
4.250
4.9
4.210
4.190
0.70
0.60
0.50
0.40
4.170
0.30
4.150
0.20
4.5
4.7
4.9
5.1
5.3
5.5
VDD (V)
FIGURE 2-3:
Battery Regulation Voltage
(VBAT) vs. Supply Voltage (VDD).
DS21915A-page 6
4.5
4.7
4.9
5.1
5.3
5.5
VDD (V)
FIGURE 2-6:
Supply Current (ISS) vs.
Supply Voltage (VDD).
 2004 Microchip Technology Inc.
MCP73853/55
2.0
TYPICAL PERFORMANCE CURVES (CONT)
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
1.00
VSET = VDD
VDD = VSS
VSET = VDD
IOUT = 10 mA
0.90
0.80
+85°C
+25°C
ISS (mA)
0.70
0.60
0.50
0.40
-40°C
0.30
VBAT (V)
80
70
60
VSET = VDD
IOUT = 10 mA
4.230
2.555
2.545
4.210
4.190
4.170
2.535
VDD (V)
80
70
60
50
40
FIGURE 2-11:
Battery Regulation Voltage
(VBAT) vs. Ambient Temperature (TA).
2.575
MCP73853
VSET = VDD
2.555
2.545
2.535
MCP73853
VSET = VDD
ITHREF = 100 µA
2.565
VTHREF (V)
2.565
30
TA (°C)
FIGURE 2-8:
Thermistor Reference
Voltage (VTHREF) vs. Supply Voltage (VDD).
2.575
20
5.5
10
5.3
0
5.1
-10
4.9
-20
4.7
-40
4.5
-30
4.150
2.525
2.555
2.545
2.535
2.525
ITHREF (µA)
FIGURE 2-9:
Thermistor Reference
Voltage (VTHREF) vs. Thermistor Bias Current
(ITHREF).
 2004 Microchip Technology Inc.
80
70
60
50
40
30
20
10
100 125 150 175 200
0
75
-10
50
-20
25
-30
2.525
0
-40
VTHREF (V)
50
4.250
VBAT (V)
VTHREF (V)
FIGURE 2-10:
Supply Current (ISS) vs.
Ambient Temperature (TA).
MCP73853
VSET = VDD
ITHREF = 100 µA
2.565
40
TA (°C)
FIGURE 2-7:
Output Leakage Current
(IDISCHARGE) vs. Battery Voltage (VBAT).
2.575
30
4.4
20
4.0
0
3.6
10
3.2
-10
2.8
-20
2.4
-30
0.20
2.0
-40
IDISCHARGE (mA)
NOTE: Unless otherwise indicated, VDD = [VREG(Typ) + 1V], IOUT = 10 mA and TA= +25°C.
TA (°C)
FIGURE 2-12:
Thermistor Reference
Voltage (VTHREF) vs. Ambient Temperature (TA).
DS21915A-page 7
MCP73853/55
2.0
TYPICAL PERFORMANCE CURVES (CONT)
NOTE: Unless otherwise indicated, VDD = [VREG(Typ) + 1V], IOUT = 10 mA and TA= +25°C.
FIGURE 2-13:
Line Transient Response.
FIGURE 2-16:
Line Transient Response.
FIGURE 2-14:
Load Transient Response.
FIGURE 2-17:
Load Transient Response.
Attenuation (dB)
-20
-30
0
MCP73853
VDD = 5.2 V
VAC = 100 mVp-p
IOUT = 10 mA
COUT = 10 µF, Ceramic
-10
Attenuation (dB)
0
-10
-40
-50
-60
-70
0.01
-20
-30
-40
-60
-70
0.1
1
10
100
1000
-80
0.01
DS21915A-page 8
Power Supply Ripple
0.1
1
10
100
1000
Frequency (kHz)
Frequency (kHz)
FIGURE 2-15:
Rejection.
MCP73853
VDD = 5.2 V
VAC = 100 mVp-p
IOUT = 100 mA
COUT = 10 µF, X7R, Ceramic
-50
FIGURE 2-18:
Rejection.
Power Supply Ripple
 2004 Microchip Technology Inc.
MCP73853/55
2.0
TYPICAL PERFORMANCE CURVES (CONT)
NOTE: Unless otherwise indicated, VDD = [VREG(Typ) + 1V], IOUT = 10 mA, and TA= +25°C.
RPROG (Ω)
FIGURE 2-19:
Charge Current (IOUT) vs.
Programming Resistor (RPROG).
 2004 Microchip Technology Inc.
80
70
60
0
50
536
40
1.6K
30
4.8K
20
0
OPEN
0
100
10
200
-10
300
VSET = VDD
RPROG = 1.6 kΩ
-40
IOUT (mA)
IOUT (mA)
400
300
295
290
285
280
275
270
265
260
255
250
-20
VSET = VDD
-30
500
TA (°C)
FIGURE 2-20:
Charge Current (IOUT) vs.
Ambient Temperature (TA).
DS21915A-page 9
MCP73853/55
3.0
PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
MCP73853
MCP73855
Sym
Description
1
2
VSET
Voltage Regulation Selection
2
3
VDD1
Battery Management Input Supply
3
—
VDD2
Battery Management Input Supply
4
4
VSS1
Battery Management 0V Reference
5
5
PROG
6
—
THREF
Cell Temperature Sensor Bias
7
—
THERM
Cell Temperature Sensor Input
8
6
TIMER
9
—
VSS3
Battery Management 0V Reference
10
8
VBAT1
Battery Charge Control Output
11
9
VBAT2
Battery Charge Control Output
12
—
VBAT3
Battery Voltage Sense
13
7
VSS2
Battery Management 0V Reference
14
10
EN
15
—
STAT2
Fault Status Output
16
1
STAT1
Charge Status Output
3.1
Voltage Regulation Selection
(VSET)
Connect to VSS for 4.1V regulation voltage. Connect to
VDD for 4.2V regulation voltage.
3.2
Battery Management Input Supply
(VDD1, VDD2)
A supply voltage of [VREG(Typ) + 0.3V] to 5.5V is
recommended. Bypass to VSS with a minimum of
4.7 µF.
3.3
Battery Management 0V Reference
(VSS1, VSS2, VSS3)
Current Regulation Set
Timer Set
Logic Enable
3.7
Timer Set (TIMER)
All safety timers are scaled by CTIMER/0.1 µF.
3.8
Battery Charge Control Output
(VBAT1, VBAT2)
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.
3.9
Battery Voltage Sense (VBAT3)
Connect to negative terminal of battery.
Voltage sense input. Connect to positive terminal of
battery. A precision internal resistor divider regulates
the final voltage on this pin to VREG.
3.4
3.10
Current Regulation Set (PROG)
Logic Enable (EN)
Preconditioning, fast and termination currents are
scaled by placing a resistor from PROG to VSS.
Input to force charge termination, initiate charge, clear
faults or disable automatic recharge.
3.5
3.11
Cell Temperature Sensor Bias
(THREF)
THREF is a voltage reference to bias external
thermistor for continuous cell temperature monitoring
and pre-qualification.
3.6
Cell Temperature Sensor Input
(THERM)
Input for an external thermistor for continuous celltemperature monitoring and prequalification. Connect
to THREF/3 to disable temperature sensing.
DS21915A-page 10
Fault Status Output (STAT2)
Current-limited, open-drain drive for direct connection
to a LED for charge status indication. Alternatively, a
pull-up resistor can be applied for interfacing to a host
microcontroller.
3.12
Charge Status Output (STAT1)
Current-limited, open-drain drive for direct connection
to a LED for charge status indication. Alternatively, a
pull-up resistor can be applied for interfacing to a host
microcontroller.
 2004 Microchip Technology Inc.
MCP73853/55
DEVICE OVERVIEW
The MCP7385X devices are highly advanced linear
charge management controllers. Refer to the functional
block diagram. Figure 4-2 depicts the operational flow
algorithm from charge initiation to completion and
automatic recharge.
4.1
Charge Qualification and
Preconditioning
Upon insertion of a battery, or application of an external
supply, the MCP7385X devices automatically perform a
series of safety checks to qualify the charge. The input
source voltage must be above the Undervoltage Lockout (UVLO) threshold, the enable pin must be above the
logic high level, and the cell temperature monitor must
be within the upper and lower thresholds (MCP73853
only). The qualification parameters are continuously
monitored, with any deviation beyond the limits automatically suspending, or terminating, the charge cycle. The
input voltage must deviate below the UVLO stop
threshold for at least one clock period to be considered
valid.
Once the qualification parameters have been met, the
MCP7385X devices initiate a charge cycle. The charge
status output is pulled low throughout the charge cycle
(see Tables 5-1 and 5-2 for charge status outputs). If
the battery voltage is below the preconditioning threshold (VPTH), the MCP7385X devices precondition the
battery with a trickle charge. The preconditioning
current is set to approximately 10% of the fast charge
regulation current. The preconditioning trickle charge
safely replenishes deeply depleted cells and minimizes
heat dissipation during the initial charge cycle. If the
battery voltage has not exceeded the preconditioning
threshold before the preconditioning timer has expired,
a fault is indicated and the charge cycle is terminated.
With VSET tied to VSS, the MCP7385X devices regulate
to 4.1V. With VSET tied to VDD, the MCP7385X devices
regulate to 4.2V.
4.4
Charge Cycle Completion and
Automatic Recharge
The MCP7385X devices monitor the charging current
during the Constant-voltage Regulation mode. The
charge cycle is considered complete when either the
charge current has diminished below approximately
7% of the regulation current (IREG), or the elapsed timer
has expired.
The MCP7385X devices automatically begin a new
charge cycle when the battery voltage falls below the
recharge threshold (VRTH), assuming all the qualification parameters are met.
4.5
Thermal Regulation
The MCP7385X devices limit the charge current based
on the die temperature. Thermal regulation optimizes
the charge cycle time while maintaining device reliability. If thermal regulation is entered, the timer is automatically slowed down to ensure that a charge cycle will
not terminate prematurely. Figure 4-1 depicts the
thermal regulation.
450
Maximum Charge Current (mA)
4.0
400
350
Minimum
300
Maximum
250
200
150
100
50
0
4.2
Constant Current Regulation –
Fast Charge
Preconditioning ends and fast charging begins when
the battery voltage exceeds the preconditioning threshold. Fast charge regulates to a constant current (IREG),
which is set via an external resistor connected to the
PROG pin. Fast charge continues until either the
battery voltage reaches the regulation voltage (VREG)
or the fast charge timer expires; in which case, a fault
is indicated and the charge cycle is terminated.
4.3
Constant Voltage Regulation
When the battery voltage reaches the regulation voltage (VREG), constant voltage regulation begins. The
MCP7385X devices monitor the battery voltage at the
VBAT pin. This input is tied directly to the positive terminal of the battery. The MCP7385X devices select the
voltage regulation value based on the state of VSET.
 2004 Microchip Technology Inc.
0
20
40
60
80
100
120
140
Junction Temperature (C)
FIGURE 4-1:
Typical Maximum Charge
Current vs. Junction Temperature.
4.6
Thermal Shutdown
The MCP7385X devices suspend charge if the die
temperature exceeds 155°C. Charging will resume
when the die temperature has cooled by approximately
10°C. The thermal shutdown is a secondary safety
feature in the event that there is a failure within the
thermal regulation circuitry.
DS21915A-page 11
MCP73853/55
DS21915A-page 12
Initialize
Note 1:
The qualification parameters are continuously
monitored throughout the charge cycle. For more
details on this, refer to Section 4.1 “Charge
Qualification and Preconditioning”.
Note 2:
The charge current will be scaled based on the
die temperature during thermal regulation. For
more details, refer to Section 4.5 “Thermal
Regulation”.
NOTE 1
VDD > VUVLO
EN High
Yes
NOTE 1
Temperature OK
No
STAT1 = Off
STAT2 = Flashing
Charge Current = 0
Yes
Preconditioning Mode
Charge Current = IPREG
Reset Safety Timer
No
No
STAT1 = Off
STAT2 = Off
VBAT > VPTH
STAT1 = On
STAT2 = Off
Yes
VBAT > VPTH
Constant-current
NOTE 2 Mode
Charge Current = IREG
Reset Safety Timer
Yes
VBAT = VREG
No
Yes
Fault
Charge Current = 0
Reset Safety Timer
Yes
No
IOUT < ITERM
Elapsed Timer
Expired
 2004 Microchip Technology Inc.
Temperature OK
Yes
VDD < VUVLO
or EN Low
Operational Flow Algorithm.
No
STAT1 = Off
STAT2 = On
Yes
Charge Termination
Charge Current = 0
Reset Safety Timer
No
Safety Timer
Expired
Yes
No
No
Yes
STAT1 = Off
STAT2 = Flashing
Safety Timer Suspended
Charge Current = 0
FIGURE 4-2:
Yes
No
Safety Timer
Expired
Yes
Constant-voltage Mode
Output Voltage = VREG
Temperature OK
No
STAT1 = Off
STAT2 = Flashing
Safety Timer Suspended
Charge Current = 0
Temperature OK
No
STAT1 = Flashing
Safety Timer Suspended
Charge Current = 0
VDD < VUVLO
VBAT < VRTH
or EN Low
Yes
No
STAT1 = Flashing
STAT2 = Off
MCP73853/55
5.0
DETAILED DESCRIPTION
5.1
Analog Circuitry
5.1.1
BATTERY MANAGEMENT INPUT
SUPPLY (VDD1, VDD2)
The VDD input is the input supply to the MCP7385X
devices. The MCP7385X devices automatically enter a
power-down mode if the voltage on the VDD input falls
below the UVLO voltage (VSTOP). This feature prevents
draining the battery pack when the VDD supply is not
present.
5.1.2
Figure 6-1 depicts a typical application circuit with
connection of the THERM input. The resistor values of
RT1 and RT2 are calculated with the following
equations.
For NTC thermistors:
2 × RCOLD × RHOT
R T1 = ---------------------------------------------RCOLD – RHOT
2 × RCOLD × RHOT
R T2 = ---------------------------------------------RCOLD – 3 × RHOT
For PTC thermistors:
2 × RCOLD × RHOT
R T1 = ---------------------------------------------RHOT – RCOLD
PROG INPUT
Fast charge current regulation can be scaled by placing
a programming resistor (RPROG) from the PROG input
to VSS. Connecting the PROG input to VSS allows for a
maximum fast charge current of 400 mA, typically. The
minimum fast charge current is 85 mA (Typ) and is set
by letting the PROG input float. Equation 5-1 calculates
the value for RPROG.
2 × RCOLD × RHOT
R T2 = ---------------------------------------------RHOT – 3 × RCOLD
Where:
RCOLD and RHOT are the thermistor
resistance values at the temperature window
of interest.
EQUATION 5-1:
13.32 – 33.3 × IREG
RPROG = -----------------------------------------------14.1 × I REG – 1.2
Where:
5.1.5
IREG is the desired fast charge current in
amps
RPROG is in kilo-ohms.
The preconditioning trickle charge current and the
charge termination current are scaled to approximately
10% and 7% of IREG, respectively.
5.1.3
CELL TEMPERATURE SENSOR
BIAS (THREF)
A 2.55V voltage reference is provided to bias an external thermistor for continuous cell temperature monitoring and prequalification. A ratio-metric window
comparison is performed at threshold levels of
VTHREF/2 and VTHREF/4.
5.1.4
Applying a voltage equal to VTHREF/3 to the THERM
input disables temperature monitoring.
CELL TEMPERATURE SENSOR
INPUT (THERM)
The MCP73853 continuously monitors temperature by
comparing the voltage between the THERM input and
VSS with the upper and lower temperature thresholds.
A negative or positive temperature coefficient, NTC or
PTC thermistor and an external voltage divider typically
develops this voltage. The temperature-sensing circuit
has its own reference to which it performs a ratio-metric
comparison. Therefore, it is immune to fluctuations in
the supply input (VDD). The temperature-sensing circuit
is removed from the system when VDD is not applied,
eliminating additional discharge of the battery pack.
 2004 Microchip Technology Inc.
TIMER SET INPUT (TIMER)
The TIMER input programs the period of the safety timers by placing a timing capacitor (CTIMER) between the
TIMER input pin and VSS. Three safety timers are
programmed via the timing capacitor.
The preconditioning safety timer period:
C TIMER
tPRECON = ------------------- × 1.0Hour s
0.1 µ F
The fast charge safety timer period:
C TIMER
t FAST = ------------------- × 1.5Hours
0.1 µ F
And, the elapsed time termination period:
C TIMER
t TERM = ------------------- × 3.0Hours
0.1 µ F
The preconditioning timer starts after qualification and
resets when the charge cycle transitions to the
constant-current, fast charge phase. The fast charge
timer and the elapsed timer start after the MCP7385X
devices transition from preconditioning. The fast
charge timer resets when the charge cycle transitions
to the Constant-voltage mode. The elapsed timer will
expire and terminate the charge if the sensed current
does not diminish below the termination threshold.
During thermal regulation, the timer is slowed down
proportional to the charge current.
DS21915A-page 13
MCP73853/55
5.1.6
BATTERY VOLTAGE SENSE (VBAT3)
The MCP73853 monitors the battery voltage at the
VBAT3 pin. This input is tied directly to the positive
terminal of the battery pack.
5.1.7
BATTERY CHARGE CONTROL
OUTPUT (VBAT1, VBAT2)
The battery charge control output is the drain terminal of
an internal P-channel MOSFET. The MCP7385X
devices provide constant-current and constant-voltage
regulation to the battery pack by controlling this
MOSFET in the linear region. The battery charge
control output should be connected to the positive
terminal of the battery pack.
5.2
Digital Circuitry
5.2.1
Qualification
STATUS OUTPUTS – MCP73853
CHARGE
CYCLE STATE
STAT1
STAT2
Qualification
OFF
OFF
Preconditioning
ON
OFF
Constantcurrent Fast
Charge
ON
OFF
Constantvoltage
ON
OFF
Charge
Complete
Flashing (1 Hz,
50% duty cycle)
OFF
Fault
OFF
ON
THERM Invalid
OFF
Flashing (1 Hz,
50% duty cycle)
Disabled Sleep mode
OFF
OFF
Input Voltage
Disconnected
OFF
OFF
DS21915A-page 14
OFF
ON
Constant Current Fast Charge
ON
Constant Voltage
ON
Charge Complete
OFF
Fault
Flashing (1Hz,
50% duty cycle)
THERM Invalid
Flashing (1Hz,
50% duty cycle)
Disabled - Sleep mode
OFF
Input Voltage Disconnected
OFF
OFF state: open-drain is high impedance;
ON state: open-drain can sink current, typically 7 mA; FLASHING: toggles between
OFF state and ON state.
The flashing rate (1 Hz) is based off a timer capacitor
(CTIMER) of 0.1 µF. The rate will vary based on the
value of the timer capacitor.
5.2.1.1
MCP73853 Only
STAT2 is on whenever the input voltage is above the
under voltage lockout, the device is enabled, and all
conditions are normal.
During a fault condition, the STAT1 status output will be
off and the STAT2 status output will flash. To recover
from a fault condition, the input voltage must be
removed and then reapplied, or the enable input, EN,
must be de-asserted to a logic-low, then asserted to a
logic-high.
When the voltage on the THERM input is outside the
preset window, the charge cycle will either not start or
be suspended. However, the charge cycle is not terminated, with recovery beng automatic. The charge cycle
will resume (or start) once the THERM input is valid and
all other qualification parameters are met.
5.2.2
VSET INPUT
The VSET input selects the regulated output voltage of
the MCP7385X devices. With VSET tied to VSS, the
MCP7385X devices regulate to 4.1V. With VSET tied to
VDD, the MCP7385X devices regulate to 4.2V.
5.2.3
OFF state: open-drain is high-impedance;
ON state: open-drain can sink current,
typically 7 mA; FLASHING: toggles
between OFF and ON states.
STAT1
Preconditioning
CHARGE STATUS OUTPUTS
(STAT1,STAT2)
TABLE 5-1:
STATUS OUTPUT – MCP73855
CHARGE CYCLE STATE
Note:
Two status outputs provide information on the state of
charge for the MCP73853. One status output provides
information on the state of charge for the MCP73855.
The current-limited, open-drain outputs can be used to
illuminate external LEDs. Optionally, a pull-up resistor
can be used on the output for communication with a
host microcontroller. Table 5-1 and Table 5-2 summarize the state of the status outputs during a charge
cycle for the MCP73853 and MCP73855, respectively.
Note:
TABLE 5-2:
LOGIC ENABLE (EN)
The logic enable input pin (EN) can be used to terminate a charge anytime during the charge cycle, initiate
a charge cycle or initiate a recharge cycle.
Applying a logic-high input signal to the EN pin, or tying
it to the input source, enables the device. Applying a
logic-low input signal disables the device and terminates a charge cycle. When disabled, the device’s
supply current is reduced to 0.28 µA, typically.
 2004 Microchip Technology Inc.
MCP73853/55
6.0
APPLICATIONS
cells, constant current followed by constant voltage.
Figure 6-1 depicts a typical stand-alone application
circuit, while Figures 6-2 and 6-3 depict the
accompanying charge profile.
STAT1
16
VSET
VDD1
VDD2
VSS1
15
EN VSS2
14 13
1
12
2
11
MCP73853
3
10
4
9
RPROG
6
THREF
5
PROG
7
THERM
Regulated Wall Cube
or
USB Power Bus
STAT2
The MCP7385X devices are designed to operate in
conjunction with a host microcontroller or in standalone applications. The MCP7385X devices provide
the preferred charge algorithm for Li-Ion/Li-Polymer
VBAT3
VBAT2
+ Single
- Lithium-Ion
Cell
VBAT1
VSS3
8
TIMER
CTIMER
RT1
RT2
FIGURE 6-1:
Typical Application Circuit.
Constant-current
Mode
Preconditioning
Mode
Constant-voltage
Mode
Regulation
Voltage
(VREG)
Regulation
Current
(IREG)
Charge
Voltage
Transition
Threshold
(VPTH)
Precondition
Current
(IPREG)
Charge
Current
Termination
Current
(ITERM)
Precondition
Safety Timer
Fast Charge
Safety Timer
Elapsed Time
Termination Timer
FIGURE 6-2:
Typical Charge Profile.
 2004 Microchip Technology Inc.
DS21915A-page 15
MCP73853/55
Preconditioning
Mode
Constant-current
Mode
Constant-voltage
Mode
Regulation
Voltage
(VREG)
Regulation
Current
(IREG)
Charge
Voltage
Transition
Threshold
(VPTH)
Precondition
Current
(IPREG)
Termination
Current
(ITERM)
Charge
Current
Precondition
Safety Timer
Fast Charge
Safety Timer
Elapsed Time
Termination Timer
FIGURE 6-3:
DS21915A-page 16
Typical Charge Profile in Thermal Regulation.
 2004 Microchip Technology Inc.
MCP73853/55
6.1
Application Circuit Design
Due to the low efficiency of linear charging, the most
important factors are thermal design and cost. These
are a direct function of the input voltage, output current
and thermal impedance between the battery charger
and the ambient cooling air. The worst-case situation
exists when the device has transitioned from the
Preconditioning mode to the Constant-current mode. In
this situation, the battery charger has to dissipate the
maximum power. A trade-off must be made between
the charge current, cost and thermal requirements of
the charger.
6.1.1
COMPONENT SELECTION
Selection of the external components in Figure 6-1 is
crucial to the integrity and reliability of the charging system. The following discussion is intended to be a guide
for the component selection process.
6.1.1.1
CURRENT PROGRAMMING RESISTOR
(RPROG)
The preferred fast charge current for Lithium-Ion cells
is at the 1C rate, with an absolute maximum current at
the 2C rate. For example, a 500 mAH battery pack has
a preferred fast charge current of 500 mA. Charging at
this rate provides the shortest charge cycle times
without degradation to the battery pack performance or
life.
400 mA is the typical maximum charge current
obtainable from the MCP7385X devices. For this situation, the PROG input should be connected directly to
VSS.
6.1.1.2
THERMAL CONSIDERATIONS
The worst-case power dissipation in the battery
charger occurs when the input voltage is at the
maximum and the device has transitioned from the
Preconditioning mode to the Constant-current mode. In
this case, the power dissipation is:
PowerDissipation = ( V DDMAX – V PTHMIN ) × I REGMAX
Where VDDMAX is the maximum input voltage
(IREGMAX) is the maximum fast charge current, and
VPTHMIN is the minimum transition threshold voltage.
Power dissipation with a 5V, +/-10% input voltage
source is:
PowerDissipation = ( 5.5V – 2.7V ) × 475mA = 1.33W
With the battery charger mounted on a 1 in2 pad of
1 oz. copper, the junction temperature rise is approximately 50°C. This would allow for a maximum operating ambient temperature of 35°C before thermal
regulation is entered.
 2004 Microchip Technology Inc.
6.1.1.3
EXTERNAL CAPACITORS
The MCP7385X devices are stable with or without a
battery load. In order to maintain good AC stability in
the Constant-voltage mode, a minimum capacitance of
4.7 µF is recommended to bypass the VBAT pin to VSS.
This capacitance provides compensation when there is
no battery load. In addition, the battery and interconnections appear inductive at high frequencies. These
elements are in the control feedback loop during
Constant-voltage mode. Therefore, the bypass
capacitance may be necessary to compensate for the
inductive nature of the battery pack.
Virtually any good quality output filter capacitor can be
used, independent of the capacitor’s minimum
Effective Series Resistance (ESR) value. The actual
value of the capacitor (and its associated ESR)
depends on the output load current. A 4.7 µF ceramic,
tantalum or aluminum electrolytic capacitor at the
output is usually sufficient to ensure stability for up to
the maximum output current.
6.1.1.4
REVERSE BLOCKING PROTECTION
The MCP7385X devices provide protection from a
faulted or shorted input or from a reversed-polarity
input source. Without the protection, a faulted or
shorted input would discharge the battery pack through
the body diode of the internal pass transistor.
6.1.1.5
ENABLE INTERFACE
In the stand-alone configuration, the enable pin is generally tied to the input voltage. The MCP7385X devices
automatically enter a low power mode when voltage on
the VDD input falls below the UVLO voltage (VSTOP),
reducing the battery drain current to 0.28 µA, typically.
6.1.1.6
CHARGE STATUS INTERFACE
Two status outputs provide information on the state of
charge. The current-limited, open-drain outputs can be
used to illuminate external LEDs. Refer to Table 5-1
and Table 5-2 for a summary of the state of the status
output during a charge cycle.
6.2
PCB Layout Issues
For optimum voltage regulation, place the battery pack
as close as possible to the device’s VBAT and VSS pins.
It is recommended that the designer minimize voltage
drops along the high-current-carrying PCB traces.
If the PCB layout is used as a heatsink, adding many
vias in the heatsink pad can help conduct more heat to
the backplane of the PCB, thus reducing the maximum
junction temperature.
DS21915A-page 17
MCP73853/55
7.0
PACKAGING INFORMATION
7.1
Package Marking Information
16-Lead QFN (MCP73853)
Example
XXXXXXX
XXXXXXX
YYWWNNN
10-Lead DFN (MCP73855)
73853
I/ML
0429256
Example
3855
I429
256
XXXX
XYWW
NNN
Legend:
Note:
*
XX...X
YY
WW
NNN
Customer specific information*
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line thus limiting the number of available characters
for customer specific information.
Standard OTP marking consists of Microchip part number, year code, week code, and traceability code.
DS21915A-page 18
 2004 Microchip Technology Inc.
MCP73853/55
16-Lead Plastic Quad Flat No Lead Package (ML) 4x4x0.9 mm Body (QFN) – Saw Singulated
D
D1
EXPOSED
METAL
PAD
e
E1
E
2
b
1
n
OPTIONAL
INDEX
AREA
TOP VIEW
BOTTOM VIEW
L
A3
A
A1
Number of Pins
Pitch
Overall Height
Standoff
Contact Thickness
Overall Width
Exposed Pad Width
Overall Length
Exposed Pad Length
Contact Width
Contact Length
Units
Dimension Limits
n
e
A
A1
A3
E
E2
D
D2
b
L
MIN
.031
.000
.152
.100
.152
.100
.010
.012
INCHES
NOM
16
.026 BSC
.035
.001
.008 REF
.157
.106
.157
.106
.012
.016
MAX
.039
.002
.163
.110
.163
.110
.014
.020
MILLIMETERS*
NOM
16
0.65 BSC
0.80
0.90
0.00
0.02
0.20 REF
4.00
3.85
2.55
2.70
3.85
4.00
2.55
2.70
0.25
0.30
0.30
0.40
MIN
MAX
1.00
0.05
4.15
2.80
4.15
2.80
0.35
0.50
*Controlling Parameter
Notes:
JEDEC equivalent: MO-220
Drawing No. C04-127
 2004 Microchip Technology Inc.
Revised 04-24-05
DS21915A-page 19
MCP73853/55
10-Lead Plastic Dual Flat No Lead Package (MF) 3x3x0.9 mm Body (DFN) – Saw Singulated
p
b
E
n
L
D
PIN 1
ID INDEX
AREA
(NOTE 2)
D2
EXPOSED
METAL
PAD
2
1
E2
TOP VIEW
BOTTOM VIEW
A
A3
EXPOSED
TIE BAR
(NOTE 1)
A1
Number of Pins
Pitch
Overall Height
Standoff
Lead Thickness
Overall Length
Exposed Pad Length
Overall Width
Exposed Pad Width
Lead Width
Lead Length
Units
Dimension Limits
n
e
(Note 3)
(Note 3)
A
A1
A3
E
E2
D
D2
b
L
MIN
.031
.000
.112
.055
.112
.047
.008
.012
INCHES
NOM
10
.020 BSC
.035
.001
.008 REF.
.118
-.118
-.010
.016
MAX
.039
.002
.124
.096
.124
.069
.015
.020
MILLIMETERS*
NOM
10
0.50 BSC
0.80
0.90
0.02
0.00
0.20 REF.
2.85
3.00
1.39
-2.85
3.00
1.20
-0.25
0.18
0.30
0.40
MIN
MAX
1.00
0.05
3.15
2.45
3.15
1.75
0.30
0.50
*Controlling Parameter
Notes:
1. Package may have one or more exposed tie bars at ends.
2. Pin 1 visual index feature may vary, but must be located within the hatched area.
3. Exposed pad dimensions vary with paddle size.
4. JEDEC equivalent: Not registered
Drawing No. C04-063
DS21915A-page 20
Revised 05/24/04
 2004 Microchip Technology Inc.
MCP73853/55
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
X
XX
Device
Temperature
Range
Package
Examples:
a)
b)
Device
MCP73853:
MCP73853T:
MCP73855:
MCP73855T:
Temperature Range
I
Package
ML
USB compatible charge controller with temperature monitor
USB compatible charge controller with temperature monitor, Tape and Reel
USB compatible charge controller
USB compatible charge controller,
Tape and Reel
a)
b)
MCP73853T-I/ML: Tape and Reel,
USB compatible charge
controller with temperature monitor
MCP73853-I/ML: USB compatible charge
controller with temperature monitor
MCP73855T-I/MF: Tape and Reel,
USB compatible charge
controller
MCP73855-I/MF: USB compatible charge
controller
= -40°C to +85°C (Industrial)
MF
= Plastic Quad Flat No Lead, 4x4 mm Body (QFN),
16-Lead
= Plastic Dual Flat No Lead, 3x3 mm Body (DFN),
10-Lead
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and
recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.
2.
Your local Microchip sales office
The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
Customer Notification System
Register on our web site (www.microchip.com) to receive the most current information on our products.
 2004 Microchip Technology Inc.
DS21915A-page 21
MCP73853/55
NOTES:
DS21915A-page 22
 2004 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION, INCLUDING BUT NOT
LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,
MERCHANTABILITY OR FITNESS FOR PURPOSE.
Microchip disclaims all liability arising from this information and
its use. Use of Microchip’s products as critical components in
life support systems is not authorized except with express
written approval by Microchip. No licenses are conveyed,
implicitly or otherwise, under any Microchip intellectual property
rights.
Trademarks
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PICSTART, PRO MATE, PowerSmart, rfPIC, and
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SmartSensor and The Embedded Control Solutions Company
are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Migratable Memory, MPASM,
MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net,
PICLAB, PICtail, PowerCal, PowerInfo, PowerMate,
PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial,
SmartTel and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2004, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
 2004 Microchip Technology Inc.
DS21915A-page 23
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
India - Bangalore
Tel: 91-80-2229-0061
Fax: 91-80-2229-0062
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
India - New Delhi
Tel: 91-11-5160-8631
Fax: 91-11-5160-8632
Austria - Weis
Tel: 43-7242-2244-399
Fax: 43-7242-2244-393
Denmark - Ballerup
Tel: 45-4450-2828
Fax: 45-4485-2829
China - Chengdu
Tel: 86-28-8676-6200
Fax: 86-28-8676-6599
Japan - Kanagawa
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
France - Massy
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
China - Fuzhou
Tel: 86-591-8750-3506
Fax: 86-591-8750-3521
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Germany - Ismaning
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Atlanta
Alpharetta, GA
Tel: 770-640-0034
Fax: 770-640-0307
Boston
Westford, MA
Tel: 978-692-3848
Fax: 978-692-3821
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
England - Berkshire
Tel: 44-118-921-5869
Fax: 44-118-921-5820
Taiwan - Hsinchu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
China - Qingdao
Tel: 86-532-502-7355
Fax: 86-532-502-7205
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
San Jose
Mountain View, CA
Tel: 650-215-1444
Fax: 650-961-0286
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
10/20/04
DS21915A-page 24
 2004 Microchip Technology Inc.
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