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MP2671DL-LF-P

P1-P3P4-P6P7-P9P10-P11
MP2671
Li-ion Battery Charger
Protection Circuit
MP2671 Rev. 0.9 www.MonolithicPower.com 1
2/23/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2671 is a high-performance single cell
Li-Ion/Li-Polymer battery charger protection
circuit. By integrating high voltage input
protection into the charger IC, the MP2671 can
tolerate an input surge up to +30V.
The device features input over voltage
protection (OVP), battery over voltage
protection (BOVP) and over charge current
protection (OCP). The device also provides
fault indications to the system when any of the
protection events happens.
For guaranteed safe operation, the MP2671
monitors its own internal temperature and turns
off the MOSFET bridging VIN and OUT when
the die temperature exceeds 140
o
C.
The MP2671 is available in 12-pin 3mm x 4mm
QFN packages.
FEATURES
• Input Surge up to 30V
• Input Over voltage protection in 1us.
• Proprietary Battery Over-Voltage Protection
• Programmable Charge Current Protection
Limit Value.
• Temperature Monitoring and Protection
• Fault Indication
• Enable Input
• 3x4mm QFN package
APPLICATIONS
• Cell Phones
• MP3 Players
• Smart Phones
• PDA
• Digital Cameras
• Desktop Chargers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP2671
VIN OUT
VB
EN
WRN
ILIM
GND
INPUT
BATTERY
CHARGER
BATTERY
PACK
C
IN
R
ILIM
R
VB
+
MP2671 – CHARGE SYSTEM PROTECTION CIRCUIT
MP2671 Rev. 0.9 www.MonolithicPower.com 2
2/23/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
PACKAGE REFERENCE
TOP VIEW
VIN
VIN
GND
WRN
N/C
N/C
1
2
3
4
5
6
N/C
OUT
OUT
ILIM
VB
EN
12
11
10
9
8
7
EXPOSED PAD
(CONNECT TO GND)
Part Number* Package
MP2671DL
QFN12
(3mm x 4mm)
Temperature Top Marking
–40°C to +85°C
2671
*
For Tape & Reel, add suffix –Z (g. MP2671DL–Z)
For RoHS compliant packaging, add suffix –LF
(e.g. MP2671DL–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN
to GND ..................................... –0.3V to 30V
OUT and VB to GND ....................... –0.3V to 7V
Other Pins (ILIM,
WRN ,EN ).......... –0.3V to 5.5V
Junction Temperature...............................150°C
Lead Temperature (Solder) ........................ 260°
Storage Temperature ..............–65°C to +150°C
Recommended Operating Conditions
(2)
Supply Voltage V
IN
.......................... 4.3V to 5.5V
Operating Current Range………….. 0A to 1.5A
Operating Temperature .............–40°C to +85°C
Thermal Resistance
(3)
θ
JA
θ
JC
QFN12 (3mm x 4mm) ............. 48 ...... 10... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on JESD51-7 4 layers board.
ELECTRICAL CHARACTERISTICS
V
IN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Power-On Reset
Rising VIN Threshold
V
POR
2.4 2.58 2.7 V
POR Hysteresis 110 mV
When enabled 0.6 mA
VIN Bias Current I
VIN
When disabled 25 µA
Protection
Input Over-voltage Protection
(OVP)
V
OVP
5.65 5.85 6.0 V
Input OVP Hysteresis 50 mV
Input OVP Falling Threshold 5.55 V
Input OVP Propagation Delay 1 µs
Over-current Protection I
OCP
V
VB
= 3V, R
ILIM
= 25k 0.93 1.0 1.07 A
Overcurrent Protection Blanking
Time
BT
OCP
170 µs
Battery Over-voltage Protection
Threshold
V
BOVP
4.28 4.34 4.4 V
Battery OVP Threshold
Hysteresis
30 mV
Battery OVP Falling Threshold 4.225 V
Battery OVP Blanking Time BT
BOVP
180 µs
MP2671 – CHARGE SYSTEM PROTECTION CIRCUIT
MP2671 Rev. 0.9 www.MonolithicPower.com 3
2/23/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
VB Pin Leakage Current V
VB
= 4.4V 20 nA
Over Temperature Protection
Rising Threshold
140
°C
Over Temperature Protection
Falling Threshold
90
°C
Logic
EN Input Logic HIGH
1.5 V
EN Input Logic LOW
0.4 V
EN Internal Series Resistor 100 200 400 k
WRN Output Logic Low Sink 5mA current 0.35 0.8 V
WRN Output Logic High Leakage
Current
1 µA
Power MOSFET
On Resistance R
DS(ON)
Measured at 500mA,
4.3<V
IN
<5.5V
170 280 m
PIN FUNCTIONS
12-pin QFN Name Description
1,2 VIN Input Power Source. VIN can withstand 30V input.
3
GND,
Exposed
Pad
System Ground. Exposed pad and GND pin must be connected to the same
ground plane.
4
WRN
Open-Drain Logic Output. This pin turns LOW when any protection event occurs.
5,6 NC No Connect. Keep it floating.
7
EN
Enable. Leave this pin floating or pull it below 0.4V to enable the IC. Drive this pin
higher than 1.5V to disable the IC.
8 VB
Battery Voltage Monitoring Input. Connect this pin to the battery pack positive
terminal via an isolation resistor.
9 ILIM
Over-current Protection Threshold Setting. Connect a resistor between this pin
and GND to set the OCP threshold.
10,11 OUT Output pin and input pin of the protected charger.
12 NC No Connect. Keep it floating.
P1-P3P4-P6P7-P9P10-P11

MP2671DL-LF-P

Mfr. #:
Buy MP2671DL-LF-P
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Battery Management Li-ion Battery Charg Protection Circuit
Lifecycle:
New from this manufacturer.
Delivery:
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