MICROCHIP MCP73123T

MCP73123/223
Lithium Iron Phosphate (LiFePO4) Battery Charge
Management Controller with Input Overvoltage Protection
Features
• Backup Energy Storages
• Complete Linear Charge Management Controller:
- Integrated Input Overvoltage Protection
- Integrated Pass Transistor
- Integrated Current Sense
- Integrated Reverse Discharge Protection
• Constant Current / Constant Voltage Operation
with Thermal Regulation
• 4.15V Undervoltage Lockout (UVLO)
• 18V Absolute Maximum Input with OVP:
- 6.5V - MCP73123
- 13V - MCP73223
• High Accuracy Preset Voltage Regulation
Through Full Temperature Range (-5°C to +55°C):
- + 0.5% - MCP73123
- + 0.6% - MCP73223
• Battery Charge Voltage Options:
- 3.6V - MCP73123
- 7.2V - MCP73223
• Resistor Programmable Fast Charge Current:
- 130 mA - 1100 mA
• Preconditioning of Deeply Depleted Cells:
- Available Options: 10% or Disable
• Integrated Precondition Timer:
- 32 Minutes or Disable
• Automatic End-of-Charge Control:
- Selectable Minimum Current Ratio:
5%, 7.5%, 10% or 20%
- Elapse Safety Timer: 4 HR, 6 HR, 8 HR or
Disable
• Automatic Recharge:
- Available Options: 95% or Disable
• Factory Preset Charge Status Output:
- On/Off or Flashing
• Soft Start
• Temperature Range: -40°C to +85°C
• Packaging: DFN-10 (3 mm x 3 mm)
Description
Applications
• Low-Cost LiFePO4 Battery Chargers
• Power Tools
• Toys
© 2009 Microchip Technology Inc.
The MCP73123/223 is a highly integrated Lithium Iron
Phosphate(LiFePO4) battery charge management
controller for use in space-limited and cost-sensitive
applications. The MCP73123/223 provides specific
charge algorithms for LiFePO4 batteries to achieve
optimal capacity and safety in the shortest charging
time possible. Along with its small physical size, the low
number of external components makes the
MCP73123/223
ideally
suitable
for
various
applications. The absolute maximum voltage, up to
18V, allows the use of MCP73123/223 in harsh
environments, such as low cost wall wart or voltage
spikes from plug/unplug.
The MCP73123/223 employs a constant current /
constant voltage charge algorithm. The 3.6V per cell
factory preset reference voltage simplifies design with
2V preconditioning threshold. The fast charge,
constant current value is set with one external resistor
from 130 mA to 1100 mA. The MCP73123/223 also
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.
The PROG pin of the MCP73123/223 also serves as
enable pin. When high impedance is applied, the
MCP73123/223 will be in standby mode.
The MCP73123/223 is fully specified over the ambient
temperature range of -40°C to +85°C. The MCP73123/
223 is available in a 10 lead, DFN package.
Package Types (Top View)
MCP73123/223
3x3 DFN *
VDD 1
VDD 2
VBAT 3
VBAT 4
NC 5
10 PROG
EP
11
9 VSS
8 VSS
7 STAT
6 NC
* Includes Exposed Thermal Pad (EP); see Table 3-1.
DS22191A-page 1
MCP73123/223
Typical Application
MCP73123 Typical Application
1
Ac-dc-Adapter
VDD
VBAT
2 VDD
VBAT
3
4
+
4.7 µF
4.7 µF
7
PROG
STAT
1-Cell
LiFePO4
Battery
10
1 kΩ
5 NC
VSS
6 NC
TABLE 1:
VSS
-
8
AVAILABLE FACTORY PRESET OPTIONS
Precondition
Timer
Elapse
Timer
End-ofCharge
Control
Automatic
Recharge
Output
Status
2V
Disable /
32 Minimum
Disable / 4 HR /
6 HR / 8 HR
5% / 7.5% /
10% / 20%
No /
Yes
Type 1 /
Type 2
4V
Disable /
32 Minimum
Disable / 4 HR /
6 HR / 8 HR
5% / 7.5% /
10% / 20%
No /
Yes
Type 1 /
Type 2
Charge
Voltage
OVP
Preconditioning
Charge Current
Preconditioning
Threshold
3.6V
6.5V
Disable / 10%
7.2V
13V
Disable / 10%
Note 1:
2:
3:
4:
5:
6:
1.15 kΩ
9
IREG: Regulated fast charge current.
VREG: Regulated charge voltage.
IPREG/IREG: Preconditioning charge current; ratio of regulated fast charge current.
ITERM/IREG: End-of-Charge control; ratio of regulated fast charge current.
VRTH/VREG: Recharge threshold; ratio of regulated battery voltage.
VPTH/VREG: Preconditioning threshold voltage
TABLE 2:
STANDARD SAMPLE OPTIONS
Part
Number
VREG
OVP
IPREG/IREG
Pre-charge
Timer
Elapse
Timer
MCP73123-22S/MF
3.6V
6.5V
10%
32 Min.
6 HR
10%
95%
2V
Type 1
MCP73223-C2S/MF
7.2V
6.5V
10%
32 Min.
6 HR
10%
95%
4V
Type 1
Note 1:
ITERM/IREG VRTH/VREG VPTH/VREG
Output
Status
Customers should contact their distributor, representatives or field application engineer (FAE) for support and sample.
Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of
this document. Technical support is available through the web site at: http//support.microchip.com
DS22191A-page 2
© 2009 Microchip Technology Inc.
MCP73123/223
Functional Block Diagram
VOREG
Direction
Control
VBAT
VDD
+
VREF
Current
Limit
-
PROG
+
Reference,
VREF (1.21V)
Bias, UVLO,
and SHDN
VOREG
CA
-
+
UVLO
-
Precondition
+
Term
+
STAT
Charge
Control,
Timer,
and
Status
Logic
Charge
+
VA
-
VSS
6.5V / 13V
+
VDD
OverVP
+
Thermal Regulation
© 2009 Microchip Technology Inc.
95% VREG
+
110°C
TSD
-
Input
VBAT
*Recharge
*Only available on selected options
DS22191A-page 3
MCP73123/223
NOTES:
DS22191A-page 4
© 2009 Microchip Technology Inc.
MCP73123/223
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†
VDD ................................................................................18.0V
VPROG ..............................................................................6.0V
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 (1.5 kW in Series with 100 pF) ......≥ 4 kV
Machine Model (200pF, No Series Resistance) ..............300V
DC 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
VDD
4
—
16
V
Conditions
Supply Input
Input Voltage Range
Operating Supply Voltage
VDD
4.2
—
6.5
V
MCP73123
Operating Supply Voltage
VDD
4.2
—
13.0
V
MCP73223
Supply Current
ISS
—
4
5.5
µA
Shutdown (VDD ≤ VBAT - 150 mV)
—
700
1500
µA
Charging
—
30
100
µA
Standby (PROG Floating)
—
50
150
µA
Charge Complete; No Battery;
VDD < VSTOP
—
0.5
2
µA
Standby (PROG Floating)
—
0.5
2
µA
Shutdown (VDD ≤ VBAT,
or VDD < VSTOP)
—
6
17
µA
Charge Complete; VDD is present
V
Battery Discharge Current
Output Reverse Leakage
Current
IDISCHARGE
Undervoltage Lockout
UVLO Start Threshold
VSTART
4.10
4.15
4.25
UVLO Stop Threshold
VSTOP
4.00
4.05
4.15
V
UVLO Hysteresis
VHYS
—
100
—
mV
VOVP
6.4
6.5
6.6
V
MCP73123
VOVP
12.8
13
13.2
V
MCP73223
VOVPHYS
—
150
—
mV
3.582
3.60
3.618
V
Overvoltage Protection
OVP Start Threshold
OVP Start Threshold
OVP Hysteresis
Voltage Regulation (Constant Voltage Mode)
TA= -5°C to +55°C, IOUT = 50 mA
Regulated Output Voltage
VREG
Output Voltage Tolerance
VRTOL
-0.5
—
+0.5
%
TA= -5°C to +55°C
Regulated Output Voltage
VREG
7.157
7.20
7.243
V
TA= -5°C to +55°C, IOUT = 50 mA
TA= -5°C to +55°C
VRTOL
-0.6
—
+0.6
%
Line Regulation
|(ΔVBAT/
VBAT)/ΔVDD|
—
0.05
0.20
%/V
Load Regulation
|ΔVBAT/VBAT|
—
0.05
0.20
%
IOUT = 50 mA - 150 mA
VDD = [VREG(Typical)+1V]
PSRR
—
-46
—
dB
IOUT = 20 mA, 10 Hz to 1 kHz
—
-30
—
dB
IOUT = 20 mA, 10 Hz to 10 kHz
Output Voltage Tolerance
Supply Ripple Attenuation
Note 1:
VDD = [VREG(Typical)+1V] to 6V
- MCP73123
VDD = [VREG(Typical)+1V] to 12V
- MCP73223
IOUT = 50 mA
Not production tested. Ensured by design.
© 2009 Microchip Technology Inc.
DS22191A-page 5
MCP73123/223
DC CHARACTERISTICS (CONTINUED)
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
VSHORT
1.40
1.45
1.50
V
MCP73123
BSP Start Threshold
VSHORT
2.80
2.90
3.00
V
MCP73223
BSP Hysteresis
VBSPHYS
—
150
—
mV
ISHORT
—
25
—
mA
130
—
1100
mA
TA=-5°C to +55°C
117
130
143
mA
PROG = 10 kΩ
900
1000
1100
mA
PROG = 1.1 kΩ
Battery Short Protection
BSP Start Threshold
BSP Regulation Current
Current Regulation (Fast Charge, Constant-Current Mode)
Fast Charge Current
Regulation
IREG
Preconditioning Current Regulation (Trickle Charge Constant Current Mode)
Precondition Current Ratio
IPREG / IREG
—
10
—
%
PROG = 1 kΩ to 10 kΩ
TA=-5°C to +55°C
—
100
—
%
No Preconditioning
Precondition Voltage
Threshold Ratio
VPTH
VPTH
1.9
2.0
2.1
V
MCP73123, VBAT Low-to-High
3.8
4.0
4.2
V
MCP73223, VBAT Low-to-High
Precondition Hysteresis
VPHYS
—
100
—
mV
%
PROG = 1 kΩ to 10 kΩ
TA=-5°C to +55°C
%
VBAT High-to-Low
No Automatic Recharge
VBAT High-to-Low (Note 1)
Charge Termination
Charge Termination
Current Ratio
ITERM / IREG
3.7
5
6.3
5.6
7.5
9.4
7.5
10
12.5
15
20
25
93
95
97
—
0
—
RDSON
—
350
—
mΩ
Automatic Recharge
Recharge Voltage
Threshold Ratio
VRTH / VREG
Pass Transistor ON-Resistance
ON-Resistance
VDD = 4.5V, TJ = 105°C (Note 1)
Status Indicator - STAT
Sink Current
ISINK
—
20
35
mA
Low Output Voltage
VOL
—
0.2
0.5
V
ISINK = 4 mA
Input Leakage Current
ILK
—
0.001
1
μA
High Impedance, VDD on pin
PROG Input
Charge Impedance Range
RPROG
1
—
21
kΩ
Shutdown Impedance
RPROG
—
200
—
kΩ
PROG Voltage Range
VPROG
0
—
5
V
Automatic Power Down
Entry Threshold
VPDENTRY
VBAT +
10 mV
VBAT +
50 mV
—
V
VDD Falling
Automatic Power Down
Exit Threshold
VPDEXIT
—
VBAT +
150 mV
VBAT +
250 mV
V
VDD Rising
Die Temperature
TSD
—
150
—
°C
Die Temperature
Hysteresis
TSDHYS
—
10
—
°C
Impedance for Shutdown
Automatic Power Down
Thermal Shutdown
Note 1:
Not production tested. Ensured by design.
DS22191A-page 6
© 2009 Microchip Technology Inc.
MCP73123/223
AC CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, 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
tELAPSED
—
0
—
Hours
3.6
4.0
4.4
Hours
5.4
6.0
6.6
Hours
7.2
8.0
8.8
Hours
Conditions
Elapsed Timer
Elapsed Timer Period
Timer Disabled
Preconditioning Timer
Preconditioning Timer Period
tPRECHG
—
0
—
Hours
0.4
0.5
0.6
Hours
µs
Disabled Timer
Status Indicator
Status Output turn-off
tOFF
—
—
500
Status Output turn-on,
tON
—
—
500
Note 1:
ISINK = 1 mA to 0 mA
(Note 1)
ISINK = 0 mA to 1 mA
(Note 1)
Not production tested. Ensured by design.
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [VREG (Typical) + 0.3V] to 6V.
Typical values are at +25°C, VDD = [VREG (Typical) + 1.0V]
Parameters
Sym
Min
Typ
Max
Units
Specified Temperature Range
TA
-40
—
+85
°C
Operating Temperature Range
TJ
-40
—
+125
°C
Storage Temperature Range
TA
-65
—
+150
°C
θJA
—
43
—
°C/W
Conditions
Temperature Ranges
Thermal Package Resistances
Thermal Resistance, DFN-10 (3x3)
© 2009 Microchip Technology Inc.
4-Layer JC51-7 Standard Board,
Natural Convection
DS22191A-page 7
MCP73123/223
NOTES:
DS22191A-page 8
© 2009 Microchip Technology Inc.
MCP73123/223
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.
3.66
3.65
3.64
3.63
3.62
3.61
3.60
3.59
3.58
3.57
3.56
3.55
Battery Regulation Voltage (V)
Battery Regulation Voltage (V)
Note: Unless otherwise indicated, VDD = [VREG(Typical) + 1V], IOUT = 50 mA and TA= +25°C, Constant-voltage mode.
ILOAD = 150 mA
VBAT = 3.6V
TA = +25°C
4.5
4.8
5.1
5.4
5.7
6.0
7.24
7.23
7.22
7.21
7.20
7.19
ILOAD = 50 mA
VDD = 9.2V
7.18
7.17
7.16
-5
0
Supply Voltage (V)
FIGURE 2-4:
Battery Regulation Voltage
(VBAT) vs. Ambient Temperature (TA).
Battery Regulation Voltage (V)
Battery Regulation Voltage (V)
ILOAD = 50 mA
VBAT = 3.6V
TA = +25°C
4.5
4.8
5.1
5.4
5.7
6.0
3.620
3.615
3.610
3.605
3.600
3.595
3.590
3.580
-5
Charge Current (mA)
Battery Regulation Voltage (V)
7.23
7.22
7.21
7.20
7.19
ILOAD = 50 mA
VBAT = 7.2V
TA = +25°C
7.16
9.0
9.6
10.2
10.8
11.4
12.0
Supply Voltage (V)
FIGURE 2-3:
Battery Regulation Voltage
(VBAT) vs. Supply Voltage (VDD).
© 2009 Microchip Technology Inc.
5 10 15 20 25 30 35 40 45 50 55
FIGURE 2-5:
Battery Regulation Voltage
(VBAT) vs. Ambient Temperature (TA).
7.24
8.4
0
Ambient Temperature (°C)
FIGURE 2-2:
Battery Regulation Voltage
(VBAT) vs. Supply Voltage (VDD).
7.17
ILOAD = 150 mA
VDD = 5.2V
3.585
Supply Voltage (V)
7.18
10 15 20 25 30 35 40 45 50 55
Ambient Temperature (°C)
FIGURE 2-1:
Battery Regulation Voltage
(VBAT) vs. Supply Voltage (VDD).
3.65
3.64
3.63
3.62
3.61
3.60
3.59
3.58
3.57
3.56
3.55
5
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
VDD = 5.2V
TA = +25°C
1 2 3 4 5 6 7 8 9 1011121314151617181920
Programming Resistor (kΩ)
FIGURE 2-6:
Charge Current (IOUT) vs.
Programming Resistor (RPROG).
DS22191A-page 9
MCP73123/223
TYPICAL PERFORMANCE CURVES (CONTINUED)
950
930
910
890
870
850
830
810
790
770
750
Fast Charge (mA)
Charge Current (mA)
Note: Unless otherwise indicated, VDD = [VREG(Typical) + 1V], IOUT = 10 mA and TA= +25°C, Constant-voltage mode.
RPROG = 1.33 kΩ
TA = +25°C
4.5
4.8
5.1
5.4
5.7
150
144
138
132
126
120
114
108
102
96
90
RPROG = 10 kΩ
TA = +25°C
4.5
6.0
4.8
5.1
Supply Voltage (V)
675
655
635
615
595
575
555
535
515
495
475
6.0
950
930
RPROG = 2 kΩ
TA = +25°C
4.5
4.8
5.1
5.4
5.7
4.8
850
830
810
RPROG = 1.33 kΩ
VDD = 5.2V
790
-5
5.4
5
15
25
35
45
55
FIGURE 2-11:
Charge Current (IOUT) vs.
Ambient Temperature (TA).
Discharge Current (uA)
5.1
5.7
6.0
Supply Voltage (V)
FIGURE 2-9:
Charge Current (IOUT) vs.
Programming Resistor (RPROG).
DS22191A-page 10
870
Ambient Temperature (°C)
RPROG = 5 kΩ
TA = +25°C
4.5
890
750
6.0
FIGURE 2-8:
Charge Current (IOUT) vs.
Programming Resistor (RPROG).
350
330
310
290
270
250
230
210
190
170
150
910
770
Supply Voltage (V)
Charge Current (mA)
5.7
FIGURE 2-10:
Charge Current (IOUT) vs.
Programming Resistor (RPROG).
Charge Current (mA)
Charge Current (mA)
FIGURE 2-7:
Charge Current (IOUT) vs.
Programming Resistor (RPROG).
5.4
Supply Voltage (V)
9.0
8.0
7.0
6.0
5.0 End of Charge
4.0
3.0
2.0
VDD < VBAT
1.0
0.0 VDD < VSTOP
-1.0
-5.0
5.0
15.0
25.0
35.0
45.0
55.0
Ambient Temperature (°C)
FIGURE 2-12:
Output Leakage Current
(IDISCHARGE) vs. Ambient Temperature (TA).
© 2009 Microchip Technology Inc.
MCP73123/223
TYPICAL PERFORMANCE CURVES (CONTINUED)
7.0
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
Thermal Regulation
6.0
Battery Voltage (V)
Charge Current
Input Voltage
Battery Voltage
5.0
4.0
3.0
2.0
VDD = 5V
RPROG = 1 kΩ
1100 mAh LiFePO4 Battery
1.0
0.2
0.1
0
0.0
0
FIGURE 2-13:
(50 ms/Div).
Overvoltage Protection Start
10
20
30
40
50
Time (Minutes)
60
Supply Current (A)
Note: Unless otherwise indicated, VDD = [VREG(Typical) + 1V], IOUT = 10 mA and TA= +25°C, Constant-voltage mode.
70
FIGURE 2-16:
Complete Charge Cycle
(1100 mAh LiFePO4 Battery).
Input Voltage
Source Voltage (V)
Battery Voltage
Charge Current
Output Ripple (mV)
FIGURE 2-14:
(50 ms/Div).
Overvoltage Protection Stop
Output Ripple (mV)
FIGURE 2-17:
Line Transient Response
(ILOAD = 10 mA, Source Voltage: 2V/Div, Output
Ripple: 100 mV/Div, Time: 100 µs/Div).
Source Voltage (V)
Output Current (mA)
Output Ripple (mV)
FIGURE 2-15:
Load Transient Response
(ILOAD = 50 mA, Output Ripple: 100 mV/Div,
Output Current: 50 mA/Div, Time: 100 µs/Div).
© 2009 Microchip Technology Inc.
FIGURE 2-18:
Line Transient Response
(ILOAD = 100 mA, Source Voltage: 2V/Div, Output
Ripple: 100 mV/Div, Time: 100 µs/Div).
DS22191A-page 11
MCP73123/223
NOTES:
DS22191A-page 12
© 2009 Microchip Technology Inc.
MCP73123/223
3.0
PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
MCP73123/223
DFN-10
3.1
PIN FUNCTION TABLES
Symbol
I/O
Description
1, 2
VDD
I
3, 4
VBAT
I/O
Battery Management Input Supply
5, 6
NC
-
No Connection
Battery Charge Control Output
7
STAT
O
Battery Charge Status Output
8, 9
VSS
-
Battery Management 0V Reference
10
PROG
I/O
Battery Charge Current Regulation Program and Charge Control Enable
11
EP
—
Exposed Pad
Battery Management Input Supply
(VDD)
A supply voltage of [VREG (Typical) + 0.3V] to 6.0V is
recommended for MCP73123, while a supply voltage
of [VREG (Typical) + 0.3V] to 12.0V is recommended for
MCP73223. Bypass to VSS with a minimum of 1 µF.
The VDD pin is rated 18V absolute maximum to prevent
suddenly rise of input voltage from spikes or low cost
ac-dc wall adapter.
3.2
Battery Charge Control Output
(VBAT)
Connect to the positive terminal of the battery. Bypass
to VSS with a minimum of 1 µF to ensure loop stability
when the battery is disconnected. The MCP73123 is
designed to provide 3.6V battery regulation voltage for
LiFePO4 batteries. Undercharge may occur if a typical
Li-Ion or Li-Poly battery is used.
3.3
No Connect (NC)
No connect.
3.4
3.5
Battery Management 0V Reference
(VSS)
Connect to the negative terminal of the battery and
input supply.
3.6
Current Regulation Set (PROG)
The fast charge current is set by placing a resistor from
PROG to VSS during constant current (CC) mode.
PROG pin also serves as charge control enable.
When a typical 200 kΩ impedance is applied to PROG
pin, the MCP73123/223 is disabled until the high
impedance is removed. Refer to Section 5.5
“Constant Current MODE - Fast Charge” for details.
3.7
Exposed Pad (EP)
The Exposed Thermal Pad (EP) shall be connected to
the exposed copper area on the Printed Circuit Board
(PCB) for the thermal enhancement. Additional vias on
the copper area under the MCP73123/223 device can
improve the performance of heat dissipation and
simplify the assembly process.
Status Output (STAT)
STAT is an open-drain logic output for connection to an
LED for charge status indication in standalone
applications. Alternatively, a pull-up resistor can be
applied for interfacing to a host microcontroller. Refer to
Table 5-1 for a summary of the status output during a
charge cycle.
© 2009 Microchip Technology Inc.
DS22191A-page 13
MCP73123/223
NOTES:
DS22191A-page 14
© 2009 Microchip Technology Inc.
MCP73123/223
4.0
DEVICE OVERVIEW
The MCP73123/223 are simple, but fully integrated linear charge management controllers. Figure 4-1 depicts
the operational flow algorithm.
SHUTDOWN MODE
VDD < VUVLO
VDD < VPD
or
PROG > 200 kΩ
STAT = HI-Z
VBAT < VPTH
VDD < VOVP
PRECONDITIONING MODE
Charge Current = IPREG
STAT = LOW
Timer Reset
Timer Enable
Timer Expired
TIMER FAULT
No Charge Current
STAT = Flashing (Op.1)
STAT = Hi-Z (Op.2)
Timer Suspended
VDD > VOVP
VDD > VOVP
VBAT > VPTH
VBAT > VPTH
FAST CHARGE MODE
Charge Current = IREG
STAT = LOW
Timer Reset
Timer Enabled
OVERVOLTAGE PROTECTION
No Charge Current
STAT = Hi-Z
Timer Suspended
VDD < VOVP
VDD > VOVP
VDD < VOVP
VBAT = VREG
Timer Expired
VBAT < VRTH
TIMER FAULT
No Charge Current
STAT = Flashing (Op.1)
STAT = Hi-Z (Op.2)
Timer Suspended
CONSTANT VOLTAGE MODE
Charge Voltage = VREG
STAT = LOW
VBAT < ITERM
Die Temperature < TSDHYS
Charge Mode Resume
CHARGE COMPLETE MODE
No Charge Current
STAT = HI-Z
Timer Reset
Die Temperature > TSD
VBAT < VSHORT
TEMPERATURE FAULT
No Charge Current
STAT = Flashing (Op.1)
STAT = Hi-Z (Op.2)
Timer Suspended
FIGURE 4-1:
VBAT > VSHORT
Charge Mode Resume
BATTERY SHORT PROTECTION
Charge Current = ISHORT
STAT = Flashing (Op.1)
STAT = Hi-Z (Op.2)
Timer Suspended
The MCP73123/223 Flow Chart.
© 2009 Microchip Technology Inc.
DS22191A-page 15
MCP73123/223
NOTES:
DS22191A-page 16
© 2009 Microchip Technology Inc.
MCP73123/223
5.0
DETAILED DESCRIPTION
5.3.2
5.1
Undervoltage Lockout (UVLO)
The battery charge control output is the drain terminal
of an internal P-channel MOSFET. The MCP73123/223
provides constant current and 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.
An internal undervoltage lockout (UVLO) circuit
monitors the input voltage and keeps the charger in
shutdown mode until the input supply rises above the
UVLO threshold. In the event a battery is present when
the input power is applied, the input supply must rise
approximately 150 mV above the battery voltage
before the MCP73123/223 device become operational.
The UVLO circuit places the device in shutdown mode
if the input supply falls to approximately 150 mV above
the battery voltage.The UVLO circuit is always active.
At any time, the input supply is below the UVLO
threshold or approximately 150 mV of the voltage at the
VBAT pin, the MCP73123/223 device is placed in a
shutdown mode.
5.2
Overvoltage Protection (OVP)
An internal overvoltage protection (OVP) circuit
monitors the input voltage and keeps the charger in
shutdown mode when the input supply rises above
the OVP threshold. The hysteresis of OVP is
approximately 150 mV for the MCP73123/223 device.
The MCP73123/223 device is operational between
UVLO and OVP threshold. The OVP circuit is also
recognized as overvoltage lock out (OVLO).
5.3
Charge Qualification
When the input power is applied, the input supply must
rise 150 mV above the battery voltage before the
MCP73123/223 becomes operational.
The automatic power down circuit places the device in
a shutdown mode if the input supply falls to within
+50 mV of the battery voltage.
The automatic circuit is always active. At any time the
input supply is within +50 mV of the voltage at the
VBAT pin, the MCP73123/223 is placed in a shutdown
mode.
For a charge cycle to begin, the automatic power
down conditions must be met and the charge enable
input must be above the input high threshold.
Note:
5.3.1
In order to extend the battery cycle life, the
charge will initiate only when battery
voltage is below 3.4V per cell.
BATTERY MANAGEMENT INPUT
SUPPLY (VDD)
The VDD input is the input supply to the MCP73123/
223. The MCP73123/223 automatically enters a
Power-down mode if the voltage on the VDD input falls
to within +50 mV of the battery voltage. This feature
prevents draining the battery pack when the VDD
supply is not present.
© 2009 Microchip Technology Inc.
5.3.3
BATTERY CHARGE CONTROL
OUTPUT (VBAT)
BATTERY DETECTION
The MCP73123/223 detects the battery presence with
charging of the output capacitor. The charge flow will
initiate when the voltage on VBAT is pulled below the
VRECHARGE threshold.
Refer
to
Section 1.0
“Electrical Characteristics” for VRECHARGE values.
The value will be the same for non-rechargeable
device.
When VBAT > VREG + Hysteresis, the charge will be
suspended or not start, depends on the condition to
prevent over charge that may occur.
5.4
Preconditioning
If the voltage at the VBAT pin is less than the
preconditioning threshold, the MCP73123/223 device
enters a preconditioning mode. The preconditioning
threshold is factory set. Refer to Section 1.0
“Electrical Characteristics” for preconditioning
threshold options.
In this mode, the MCP73123/223 device supplies 10%
of the fast charge current (established with the value of
the resistor connected to the PROG pin) to the battery.
When the voltage at the VBAT pin rises above the
preconditioning threshold, the MCP73123/223 device
enters the constant current (fast charge) mode.
Note:
5.4.1
The MCP73123/223 also offer options
with no preconditioning.
TIMER EXPIRED DURING
PRECONDITIONING MODE
If the internal timer expires before the voltage threshold
is reached for fast charge mode, a timer fault is
indicated and the charge cycle terminates. The
MCP73123/223 device remains in this condition until
the battery is removed or input power is cycled. If the
battery is removed, the MCP73123/223 device enters
the Stand-by mode where it remains until a battery is
reinserted.
Note:
The typical preconditioning timer for
MCP73123/223 is 32 minutes. The
MCP73123/223 also offer options with no
preconditioning timer.
DS22191A-page 17
MCP73123/223
5.5
Constant Current MODE - Fast
Charge
During the constant current mode, the programmed
charge current is supplied to the battery or load.
The charge current is established using a single
resistor from PROG to VSS. The program resistor and
the charge current are calculated using the following
equation:
EQUATION 5-1:
I REG = 1104 × R
– 0.93
Where:
RPROG
=
kilo-ohms (kΩ)
IREG
=
milliampere (mA)
5.5.1
TIMER EXPIRED DURING
CONSTANT CURRENT - FAST
CHARGE MODE
If the internal timer expires before the recharge voltage
threshold is reached, a timer fault is indicated and the
charge cycle terminates. The MCP73123/223 device
remains in this condition until the battery is removed. If
the battery is removed or input power is cycled. The
MCP73123/223 device enters the Stand-by mode
where it remains until a battery is reinserted.
5.6
Constant Voltage Mode
When the voltage at the VBAT pin reaches the
regulation voltage, VREG, constant voltage regulation
begins. The regulation voltage is factory set to 3.6V for
single cell or 7.2V for dual cell with a tolerance
of ± 0.5%.
EQUATION 5-2:
R PROG = 10
Constant current mode is maintained until the voltage
at the VBAT pin reaches the regulation voltage, VREG.
When constant current mode is invoked, the internal
timer is reset.
( log 1104 ) ⁄ ( – 0.93 )
Where:
RPROG
=
kilo-ohms (kΩ)
IREG
=
milliampere (mA)
5.7
Table 5-1 provides commonly seen E96 (1%) and E24
(5%) resistors for various charge current to reduce
design time.
TABLE 5-1:
RESISTOR LOOKUP TABLE
Charge
Recommended Recommended
Current (mA) E96 Resistor (Ω) E24 Resistor (Ω)
130
10k
10k
150
8.45k
8.20k
200
6.20k
6.20k
250
4.99k
5.10k
300
4.02k
3.90k
350
3.40k
3.30k
400
3.00k
3.00k
450
2.61k
2.70k
500
2.32k
2.37k
550
2.10k
2.20k
600
1.91k
2.00k
650
1.78k
1.80k
700
1.62k
1.60k
750
1.50k
1.50k
800
1.40k
1.50k
850
1.33k
1.30k
900
1.24k
1.20k
950
1.18k
1.20k
1000
1.10k
1.10k
1100
1.00k
1.00k
DS22191A-page 18
Charge Termination
The charge cycle is terminated when, during constant
voltage mode, the average charge current diminishes
below a threshold established with the value of 5%,
7.5%, 10% or 20% of fast charge current or internal
timer has expired. A 1 ms filter time on the termination
comparator ensures that transient load conditions do
not result in premature charge cycle termination. The
timer period is factory set and can be disabled. Refer to
Section 1.0 “Electrical Characteristics” for timer
period options.
5.8
Automatic Recharge
The MCP73123/223 device continuously monitors the
voltage at the VBAT pin in the charge complete mode. If
the voltage drops below the recharge threshold,
another charge cycle begins and current is once again
supplied to the battery or load. The recharge threshold
is factory set. Refer to Section 1.0 “Electrical
Characteristics” for recharge threshold options.
Note:
The MCP73123/223 also offer options
with no automatic recharge.
For the MCP73123/223 device with no recharge option,
the MCP73123/223 will go into standby mode when
termination condition is met. The charge will not restart
until following condition has met:
• Battery is removed from system and insert again.
• VDD is removed and plug in again
• RPROG is disconnected (or high impedance) and
reconnect
© 2009 Microchip Technology Inc.
MCP73123/223
5.9
Thermal Regulation
The MCP73123/223 shall limit the charge current
based on the die temperature. The thermal regulation
optimizes the charge cycle time while maintaining
device reliability. Figure 5-1 depicts the thermal
regulation for the MCP73123/223 device. Refer to
Section 1.0 “Electrical Characteristics” for thermal
package resistances and Section 6.1.1.2 “Thermal
Considerations” for calculating power dissipation.
.
Status Indicator
The charge status outputs are open-drain outputs with
two different states: Low (L), and High Impedance
(Hi-Z). The charge status outputs can be used to
illuminate LEDs. Optionally, the charge status outputs
can be used as an interface to a host microcontroller.
Table 5-2 summarize the state of the status outputs
during a charge cycle.
TABLE 5-2:
STATUS OUTPUTS
CHARGE CYCLE
STATE
600
Charge Current (mA)
5.11
STAT
500
Shutdown
Hi-Z
400
Standby
Hi-Z
300
200
100
L
Charge Complete - Standby
0
25 35 45 55 65 75 85 95 105 115 125 135 145
Junction Temperature (°C)
5.10
L
Constant Current Fast
Charge
Constant Voltage
VDD = 5.2V
RPROG = 2 kΩ
FIGURE 5-1:
Preconditioning
Thermal Regulation
Thermal Shutdown
The MCP73123/223 suspends charge if the die
temperature exceeds +150°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.
L
Hi-Z
Temperature Fault
1.6 second 50% D.C.
Flashing (Type 2)
Hi-Z (Type 1)
Timer Fault
1.6 second 50% D.C.
Flashing (Type 2)
Hi-Z (Type 1)
Preconditioning Timer Fault
1.6 second 50% D.C.
Flashing (Type 2)
Hi-Z (Type 1)
5.12
BATTERY SHORT PROTECTION
Once a lithium iron phosphate battery is detected, an
internal battery short protection (BSP) circuit starts
monitoring the battery voltage. When VBAT falls below
a typical 1.7V battery short protection threshold voltage
per cell, the charging behavior is postponed.
25 mA (typical) detection current is supplied for
recovering from battery short condition.
Preconditioning mode resumes when VBAT raises
above battery short protection threshold. The battery
voltage must rise approximately 150 mV above the
battery short protection voltage before the MCP73123/
223 device become operational.
© 2009 Microchip Technology Inc.
DS22191A-page 19
MCP73123/223
NOTES:
DS22191A-page 20
© 2009 Microchip Technology Inc.
MCP73123/223
6.0
APPLICATIONS
The MCP73123/223 is designed to operate in conjunction with a host microcontroller or in stand-alone
applications. The MCP73123/223 provides the preferred charge algorithm for lithium iron phosphate
cells Constant-current followed by Constant-voltage.
Figure 6-1 depicts a typical stand-alone application
circuit, while Figure 6-2 depict the accompanying
charge profile.
MCP73123 Typical Application
1
Ac-dc-Adapter
VDD
VBAT
2 VDD
VBAT
3
4
4.7 µF
+
4.7 µF
7
STAT
PROG
1-Cell
LiFePO4
Battery
10
1 kΩ
5 NC
6 NC
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
Thermal Regulation
Battery Voltage (V)
6.0
5.0
4.0
3.0
VDD = 5V
RPROG = 1 kΩ
1100 mAh LiFePO4 Battery
1.0
0.2
0.1
0
0.0
0
10
1.15 kΩ
-
8
Typical Application Circuit.
7.0
2.0
VSS
9
20
30
40
50
Time (Minutes)
60
Supply Current (A)
FIGURE 6-1:
VSS
70
FIGURE 6-2:
Typical Charge Profile for
Single-Cell LiFePO4 Battery).
© 2009 Microchip Technology Inc.
DS22191A-page 21
MCP73123/223
6.1
Application Circuit Design
Due to the low efficiency of linear charging, the most
important factors are thermal design and cost, which
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 is
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 as a guide
for the component selection process.
6.1.1.1
Charge Current
The recommended fast charge current should be
obtained from battery manufacturer. For example, a
1000 mAh battery pack with 2C preferred fast charge
current has a charge current of 1000 mA. Charging at
this rate provides the shortest charge cycle times
without degradation to the battery pack performance or
life.
Note:
6.1.1.2
Please consult with your battery supplier
or refer to battery data sheet for preferred
charge rate.
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:
EQUATION 6-1:
PowerDissipation = ( V DDMAX – V PTHMIN ) × I REGMAX
Where:
VDDMAX
=
the maximum input voltage
IREGMAX
=
the maximum fast charge current
VPTHMIN
=
the minimum transition threshold
voltage
DS22191A-page 22
Power dissipation with a 5V, ±10% input voltage
source, 500 mA ±10% and preconditioning threshold
voltage at 2V is:
EQUATION 6-2:
PowerDissipation = ( 5.5V – 2V ) × 550mA = 1.925W
This power dissipation with the battery charger in the
DFN-10 package will result approximately 83°C above
room temperature.
6.1.1.3
External Capacitors
The MCP73123/223 is stable with or without a battery
load. In order to maintain good AC stability in the
Constant-voltage mode, a minimum capacitance of
1 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.
A minimum of 16V rated 1 µF, is recommended to apply
for output capacitor and a minimum of 25V rated 1 µF,
is recommended to apply for input capacitor for typical
applications.
TABLE 6-1:
MLCC CAPACITOR EXAMPLE
MLCC
Capacitors
Temperature
Range
X7R
-55°C to +125°C
±15%
X5R
-55°C to +85°C
±15%
Tolerance
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 1 µF ceramic,
tantalum or aluminum electrolytic capacitor at the
output is usually sufficient to ensure stability.
6.1.1.4
Reverse-Blocking Protection
The MCP73123/223 provides protection from a faulted
or shorted input. Without the protection, a faulted or
shorted input would discharge the battery pack through
the body diode of the internal pass transistor.
© 2009 Microchip Technology Inc.
MCP73123/223
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,
recommended to 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. Figure 6-4 and Figure 6-5 depict
a typical layout with PCB heatsinking.
FIGURE 6-5:
Typical Layout (Bottom).
MCP73X23EV-LFP
FIGURE 6-3:
Typical Layout (Top).
FIGURE 6-4:
Typical Layout (Top Metal).
© 2009 Microchip Technology Inc.
DS22191A-page 23
MCP73123/223
NOTES:
DS22191A-page 24
© 2009 Microchip Technology Inc.
MCP73123/223
7.0
PACKAGING INFORMATION
7.1
Package Marking Information
Example:
10-Lead DFN (3x3)
Standard *
XXXX
Part Number
YYWW
MCP73123-22SI/MF
MCP73223-C2SI/MF
NNN
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
Code
77HI
X7HI
77HI
0923
256
Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
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.
© 2009 Microchip Technology Inc.
DS22191A-page 25
MCP73123/223
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© 2009 Microchip Technology Inc.
MCP73123/223
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© 2009 Microchip Technology Inc.
DS22191A-page 27
MCP73123/223
NOTES:
DS22191A-page 28
© 2009 Microchip Technology Inc.
MCP73123/223
APPENDIX A:
REVISION HISTORY
Revision A (July 2009)
• Original Release of this Document.
© 2009 Microchip Technology Inc.
DS22191A-page 29
MCP73123/223
NOTES:
DS22191A-page 30
© 2009 Microchip Technology Inc.
MCP73123/223
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
Device:
MCP73123:
MCP73123T:
MCP73223:
MCP73223T:
Temperature
Range:
I
Package:
MF
Examples:
a)
b)
Single Cell Lithium Iron Phosphate Battery
Device
Single Cell Lithium Iron Phosphate Battery
Device, Tape and Reel
Dual Cell Lithium Iron Phosphate Battery
Device
Dual Cell Lithium Iron Phosphate Battery
Device, Tape and Reel
a)
b)
MCP73123-22SI/MF: Single Cell Lithium Iron
Phosphate Battery Device
MCP73123T-22SI/MF: Tape and Reel,
Single Cell Lithium Iron
Phosphate Battery Device
MCP73223-C2SI/MF: Dual Cell Lithium Iron
Phosphate Battery Device
MCP73223T-C2SI/MF:Tape and Reel,
Dual Cell Lithium Iron
Phosphate Battery Device
= -40°C to +85°C (Industrial)
= Plastic Dual Flat No Lead, 3x3 mm Body (DFN),
10-Lead
© 2009 Microchip Technology Inc.
DS22191A-page 31
MCP73123/223
NOTES:
DS22191A-page 32
© 2009 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
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the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
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rfPIC and UNI/O are registered trademarks of Microchip
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© 2009, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, 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.
© 2009 Microchip Technology Inc.
DS22191A-page 33
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
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4080
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Chicago
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Tel: 630-285-0071
Fax: 630-285-0075
Cleveland
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Tel: 216-447-0464
Fax: 216-447-0643
Dallas
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Tel: 972-818-7423
Fax: 972-818-2924
Detroit
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Tel: 248-538-2250
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Los Angeles
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Tel: 949-462-9523
Fax: 949-462-9608
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Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Korea - Daegu
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Fax: 82-53-744-4302
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
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China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
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Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Hsin Chu
Tel: 886-3-6578-300
Fax: 886-3-6578-370
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
03/26/09
DS22191A-page 34
© 2009 Microchip Technology Inc.