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MP2623GR-Z

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MP2623
Stand-Alone, 2A, 1- or2-Cell
Switching LiFePO
4
Battery Charger
MP2623 Rev. 1.0 www.MonolithicPower.com 1
12/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2623 is a monolithic, DC-DC, step-
down, switching charger for a 1-or-2-cell serial
LiFePO
4
battery. It has an integrated high-side
power MOSFET that can output up to a 2A
charge current. It also has peak-current–mode
control for fast loop response and easy
compensation.
The MP2623 uses a sense resistor to control a
programmable charge current, and accurately
regulates the charge current and the charge
voltage using two control loops.
The MP2623 has multiple fault-condition
protections that include cycle-by-cycle current
limiting and thermal shutdown. Other safety
features include battery temperature monitoring
and protection, charge status indication and a
programmable timer to halt charging after a set
time period.
The MP2623 requires a minimal number of
readily-available external components.
The MP2623 is available in a 4mm×4mm 16-pin
QFN package.
FEATURES
Charges 1- and 2-Cell LiFePO
4
Battery
Packs
Wide Operating-Input Range
Programmable Charging Current of up to 2A
±0.75% V
BATT
Accuracy
0.2 Integrated Power MOSFET
Up to 90% Efficiency
Fixed 1.1MHz Frequency
Preconditioning for Fully-Depleted Batteries
Charging Status Indicator
Input Supply Fault Indicator
Thermal Shutdown
Cycle-by-Cycle Over-Current Protection
Battery Temperature Monitor and Protection
APPLICATIONS
Power Tools and Portable Equipment
Handheld Terminals
LiFePO
4
Battery Chargers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithi
c
Power Systems, Inc.
TYPICAL APPLICATION
L
RS1
VIN
VREF33
VCC
CELLS
CHGOK
ACOK
NTC
EN
COMPV
COMPI
GND TMR
BATT
CSP
BST
SW
OFF
ON
C2
22
C3
1
C4
2.2 nF
C5
2. 2nF
C6
0.1
C7
0.1
R1 R2
R3
10k
10k
R4 2.5k
R5 750
4.7
100 m
D1
C1
4.7
R
NTC
V
IN
1-2 Cell
LiFePO
4
D2
5.5V to 24V
MP2623
10
C
IN
MP2623 – 2A, 24V INPUT, 1.1MHz 1- OR 2-CELL SWITCHING LIFEPO
4
BATTERY CHARGER
MP2623 Rev. 1.0 www.MonolithicPower.com 2
12/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MP2623GR QFN16 (4×4mm) MP2623
*For Tape & Reel, add suffix –Z (e.g. MP2623GR–Z)
PACKAGE REFERENCE
TOP VIEW
EXPOSED PAD
ON BACKSIDE
PIN 1 ID
VCC
NTC
ACOK
CHGOK
GND
CSP
BATT
COMPI
1
2
3
4
13141516
8765
COMPVCELLSENVREF33
TMRBSTSWVIN
12
11
10
9
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage VCC, VIN ............................ 26V
V
SW
..................................... -0.3V to (V
IN
+ 0.3V)
V
BST
...................................................... V
SW
+ 6V
V
CSP
, V
BATT,
...................................-0.3V to +18V
V
ACOK
, V
CHGOK,
..............................-0.3V to +26V
All Other Pins..................................-0.3V to +6V
Continuous Power Dissipation (T
A
= 25°C)
(2)
............................................................. 2.7W
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... -65°C to +150°C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
..............................5V to 24V
Operating Junction Temp. (T
J
) -40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
QFN16 (4x4mm)..................... 46 ...... 10... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by
P
D
(MAX)=(T
J
(MAX)-T
A
)/
JA
. Exceeding the maximum
allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
Internal thermal shutdown circuitry protects the device from
permanent damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7 4-layer board.
MP2623 – 2A, 24V INPUT, 1.1MHz 1- OR 2-CELL SWITCHING LIFEPO
4
BATTERY CHARGER
MP2623 Rev. 1.0 www.MonolithicPower.com 3
12/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 19V, T
A
= 25°C, CELLS=0V, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
CELLS=0V 3.573 3.6 3.627
Battery-terminal voltage V
BATT
CELLS=Float 7.146 7.2 7.254
V
CSP，BATT current
I
CSP
,I
BATT
Charging disabled 1 µA
Switch-on resistance R
DS(ON)
0.2
Switch leakage
EN = 4V, V
SW
= 0V
0 1 A
CC
(5)
4.1 A
Peak-current limit
TRICKLE 2 A
CC current I
CC
RS1=100m 1.8 2.0 2.2 A
Trickle-charge current I
TRICKLE
10% I
CC
Trickle-charge voltage threshold V
TC
2.52 V/cell
Trickle-charge hysteresis 300 mV/cell
Termination current threshold I
BF
5% 10% 15% I
CC
Oscillator frequency f
SW
CELLS=0V,
V
BATT
=3.2V
1100 kHz
Fold-back frequency V
BATT
=0V 350 kHz
Maximum duty cycle 90 %
Maximum current-sense voltage
(CSP to BATT)
V
SENSE
170 200 230 mV
Minimum ON time
(5)
t
ON
100 ns
Under-voltage lockout threshold,
rising
V
IN
3.1 3.3 3.5 V
Under-voltage lockout threshold,
hysteresis
300 1000 mV
Open-drain sink current V
DRAIN
=0.3V 5 mA
Dead battery indicator
In trickle mode
C
TMR
=0.1F
30 min
Recharge threshold for V
BATT
V
RECHG
3.42 V/cell
Recharge hysteresis 100 mV
NTC low-temp rising threshold R
NTC
=NCP18X103, 0°C 70.5 73.5 76.5
%of
VREF33
NTC high-temp falling threshold
R
NTC
=NCP18X103,
50°C
27.5 29.5 31.5
%of
VREF33
VIN min. head-room (reverse
blocking)
V
IN
V
BATT
180 mV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MP2623GR-Z

Mfr. #:
Buy MP2623GR-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Battery Management 2A 1-2Cell Switching LiFePO4 Bat Charger
Lifecycle:
New from this manufacturer.
Delivery:
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