19-2899; Rev 2; 8/05
IT
TION K
VALUA
E
BLE
AVAILA
Linear Li+ Battery Charger with Integrated Pass FET
and Thermal Regulation in 3mm x 3mm Thin DFN
General Description
The MAX1507 is an intelligent, stand-alone constant-cur-
rent, constant-voltage (CCCV), thermally regulated linear
charger for a single-cell lithium-ion (Li+) battery. The
MAX1507 integrates the current-sense circuit, MOS pass
element, and thermal-regulation circuitry, and also elimi-
nates the reverse-blocking Schottky diode to create the
simplest and smallest charging solution for hand-held
equipment.
The MAX1507 functions as a stand-alone charger to
control the charging sequence from the prequalification
state through fast-charge, top-off charge, and full-
charge indication.
Proprietary thermal-regulation circuitry limits the die
temperature when fast charging or while exposed to
high ambient temperatures, allowing maximum charg-
ing current without damaging the IC.
The MAX1507 achieves high flexibility by providing an
adjustable fast-charge current and thermal regulation
setpoints. Other features include the charging status
(CHG) of the battery and an active-low control input (EN).
The MAX1507 accepts a +4.25V to +13V supply, but dis-
ables charging when the input voltage exceeds +7V to
protect against unqualified or faulty AC adapters. The
MAX1507 operates over the extended temperature
range (-40°C to +85°C) and is available in a compact
8-pin thermally enhanced 3mm x 3mm Thin DFN pack-
age with 0.8mm height.
Features
♦
Stand-Alone Linear 1-Cell Li+ Battery Charger
♦
No External FET, Reverse-Blocking Diode, or
Current-Sense Resistor Required
♦
Programmable Fast-Charge Current (0.8A max)
♦
Proprietary Programmable Die-Temperature
Regulation Control (+90°C, +100°C, and +130°C)
♦
+4.25V to +13V Input Voltage Range with Input
Overvoltage Protection (OVP) Above +7V
♦
Charge-Current Monitor for Fuel Gauging
♦
Low Dropout Voltage—130mV at 0.425A
♦
Input Power-Source Detection Output (VL) and
Charge-Enable Input (EN)
♦
Soft-Start Limits Inrush Current
♦
Charge Status Output (CHG) for LED or
Microprocessor Interface
♦
Small 3mm x 3mm 8-Pin Thin DFN Package,
0.8mm High
MAX1507
Ordering Information
PART
MAX1507ETA-T
TEMP RANGE
PIN-PACKAGE
TOP
MARK
AGW
AGW
Applications
-40°C to +85°C 8 Thin DFN-EP*
Cellular and Cordless Phones
PDAs
Digital Cameras and MP3 Players
USB Appliances
Charging Cradles and Docks
Bluetooth™ Equipment
MAX1507ETA+T -40°C to +85°C 8 Thin DFN-EP*
+
Denotes lead-free package.
*EP
= Exposed paddle.
Typical Operating Circuit
INPUT
4.25V TO 13V
IN
1μF
BATT
Pin Configuration
BATT
CHG
8
7
6
EN
TOP VIEW
TEMP
1μF
Li+
4.2V
5
MAX1507
CHG
ISET
TEMP
GND
MAX1507
+
1
VL
2
IN
3
GND
4
ISET
OFF
EN
ON
0.47μF
VL
2.80kΩ
3mm x 3mm THIN DFN
Bluetooth is a trademark of Ericsson.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Linear Li+ Battery Charger with Integrated Pass FET
and Thermal Regulation in 3mm x 3mm Thin DFN
MAX1507
ABSOLUTE MAXIMUM RATINGS
IN,
CHG
to GND .....................................................-0.3V to +14V
VL, BATT, ISET,
EN,
TEMP to GND ..........................-0.3V to +6V
VL to IN...................................................................-14V to +0.3V
IN to BATT Continuous Current.............................................0.9A
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 24.4mW/°C above+70°C) ..........1951mW
Short-Circuit Duration.................................................Continuous
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
IN
= 5V, V
BATT
= 4.0V, TEMP =
EN
=
CHG
= unconnected, R
ISET
= 2.8kΩ to GND, C
VL
= 0.47µF, BATT bypassed to GND with 1µF,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Input Voltage Range
Input Operating Range
ACOK
Trip Point, IN
Overvoltage Lockout Trip Point
V
IN
- V
BATT
, V
IN
rising
V
IN
- V
BATT
, V
IN
falling
V
IN
rising
V
IN
hysteresis
Charging (I
IN
- I
BATT
)
IN Input Current
VL Output Voltage
VL Load Regulation
VL Temperature Coefficient
VL Undervoltage Lockout Trip Point
BATT Input Current
Maximum RMS Charge Current
Battery Regulation Voltage
BATT Removal Detection Threshold
I
BATT
= 0
V
BATT
rising
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
4.162
4.150
4.4
Disabled,
EN
= VL
OFF state (V
IN
= V
BATT
= 4.0V)
I
VL
= 100µA
I
VL
= 100µA to 2mA
I
VL
= 100µA
V
IN
rising
Hysteresis
V
IN
= 0 to 4V
EN
= VL
3.3
-71
-2
2.95
0.17
3
4
0.8
4.2
4.2
4.67
4.238
4.250
4.9
10
10
-200
CONDITIONS
MIN
0
4.25
20
15
6.5
40
30
7
0.11
1
0.8
2
1.5
0.065
V
mV
mV/°C
V
µA
A
V
V
mA
TYP
MAX
13
6.50
60
45
7.5
UNITS
V
V
mV
V
2
_______________________________________________________________________________________
Linear Li+Battery Charger with Integrated Pass FET
and Thermal Regulation in 3mm x 3mm Thin DFN
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 5V, V
BATT
= 4.0V, TEMP =
EN
=
CHG
= unconnected, R
ISET
= 2.8kΩ to GND, C
VL
= 0.47µF, BATT bypassed to GND with 1µF,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
BATT Removal Detection-Threshold Hysteresis
Minimum BATT Bypass Capacitance
Fast-Charge Current-Loop System Accuracy
Precharge Current System Accuracy
V
BATT
= 3.5V
Percentage of the fast-charge current,
V
BATT
= 2.2V
TEMP = VL
Die-Temperature-Regulation Set Point
V
BATT
Precharge Threshold Voltage
Current-Sense Amplifier Gain, I
SET
to I
BATT
in Fast Charge Mode
Regulator Dropout Voltage (V
IN
- V
BATT
)
EN
Logic Input Low Voltage
EN
Logic Input High Voltage
EN
Internal Pulldown Resistor
CHG
Output Low Current
CHG
Output High Leakage Current
Full Battery Detection Current Threshold
(as a Percentage of the Fast-Charge Current)
V
CHG
= 1V
V
CHG
= 13V
I
BATT
falling
T
A
= +25°C
T
A
= +85°C
5
0.002
10
15
TEMP = floating
TEMP = GND
V
BATT
rising
I
BATT
= 500mA, V
ISET
= 1.4V
V
BATT
= 4.1V, I
BATT
= 425mA
4.25V < V
IN
< 6.5V
4.25V < V
IN
< 6.5V
1.3
100
5
200
12
400
20
1
2.3
0.880
478
5
CONDITIONS
MIN
TYP
200
1
520
10
130
100
90
2.5
0.958
130
2.7
1.035
200
0.52
V
mA/A
mV
V
V
kΩ
mA
µA
%
°C
562
15
MAX
UNITS
mV
µF/A
mA
%
MAX1507
Note 1:
Limits are 100% production tested at T
A
= +25°C. Limits over operating temperature range are guaranteed through correlation
using statistical quality control (SQC) methods.
_______________________________________________________________________________________
3
Linear Li+ Battery Charger with Integrated Pass FET
and Thermal Regulation in 3mm x 3mm Thin DFN
MAX1507
Typical Operating Characteristics
(V
IN
= 5V, V
BATT
= 4.0V, TEMP =
EN
=
CHG
= unconnected, R
ISET
= 2.8kΩ to GND, C
IN
= 1µF, C
BATT
= 1µF, C
VL
= 0.47µF, T
A
=
+25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1507 toc01
DISABLED-MODE SUPPLY
CURRENT vs. INPUT VOLTAGE
MAX1507 toc02
CHARGE CURRENT
vs. BATTERY VOLTAGE
TEMP = VL
MAX1507 toc03
2.0
I
BATT
= 0
1.5
2.0
DISABLED-MODE SUPPLY CURRENT (mA)
EN = VL
1.5
600
500
CHARGE CURRENT (mA)
400
300
200
100
SUPPLY CURRENT (mA)
1.0
1.0
0.5
0.5
0
0
2
4
6
8
10
12
INPUT VOLTAGE (V)
0
0
2
4
6
8
10
12
INPUT VOLTAGE (V)
0
0
1
2
3
4
BATTERY VOLTAGE (V)
CHARGE CURRENT
vs. INPUT VOLTAGE
600
550
500
450
400
350
300
250
200
150
100
50
0
INPUT VOLTAGE (V)
TEMP = VL
600
550
500
450
400
350
300
250
200
150
100
50
0
MAX1507 toc04
CHARGE CURRENT
vs. INPUT-VOLTAGE HEADROOM
MAX1507 toc05
BATTERY REGULATION VOLTAGE
vs. TEMPERATURE
4.207
4.204
4.201
4.198
4.195
4.192
4.189
4.186
4.183
4.180
MAX1507 toc06
4.210
BATTERY REGULATION VOLTAGE (V)
V
BATT
= 4.0V
CHARGE CURRENT (mA)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
CHARGE CURRENT (mA)
0 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40
V
IN
- V
BATT
(V)
-40
-15
10
35
60
85
TEMPERATURE (°C)
CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX1507 toc07
CHARGE CURRENT
vs. AMBIENT TEMPERATURE (TEMP = VL)
900
800
CHARGE CURRENT (mA)
700
600
500
400
300
200
100
0
R
ISET
= 1.87kΩ
-40
-15
10
35
60
85
V
BATT
= 3.6V
V
BATT
= 4.0V
MAX1507 toc08
600
580
560
CHARGE CURRENT (mA)
540
520
500
480
460
440
420
400
-40
-15
10
35
60
TEMP = VL
1000
85
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
4
_______________________________________________________________________________________
Linear Li+ Battery Charger with Integrated Pass FET
and Thermal Regulation in 3mm x 3mm Thin DFN
MAX1507
Typical Operating Characteristics (continued)
(V
IN
= 5V, V
BATT
= 4.0V, TEMP =
EN
=
CHG
= unconnected, R
ISET
= 2.8kΩ to GND, C
IN
= 1µF, C
BATT
= 1µF, C
VL
= 0.47µF, T
A
=
+25°C, unless otherwise noted.)
CHARGE CURRENT
vs. AMBIENT TEMPERATURE (TEMP = OPEN)
MAX1507 toc09
CHARGE CURRENT
vs. AMBIENT TEMPERATURE (TEMP = GND)
900
800
CHARGE CURRENT (mA)
700
600
500
400
300
200
R
ISET
= 1.87kΩ
-40
-15
10
35
60
85
V
BATT
= 3.6V
V
BATT
= 4.0V
MAX1507 toc10
1000
900
800
CHARGE CURRENT (mA)
700
600
500
400
300
200
100
0
-40
-15
10
35
60
R
ISET
= 1.87kΩ
V
BATT
= 3.6V
V
BATT
= 4.0V
1000
100
0
85
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
Pin Description
PIN
1
2
3
4
NAME
VL
IN
GND
ISET
FUNCTION
Internally Generated Logic Supply for Chip. Bypass VL to GND with a 0.47µF capacitor.
Input Supply Voltage. Bypass IN to GND with a 1µF capacitor to improve line noise and transient rejection.
Ground. Connect GND and exposed pad to a large copper trace for maximum power dissipation.
Charge-Current Program and Fast-Charge Current Monitor. Output current from ISET is 0.958mA per amp of
battery charging current. The charging current is set by connecting a resistor from ISET to GND. Fast-charge
current = 1461V / R
ISET
Ω.
Logic-Level Enable Input. Drive
EN
high to disable charger. Pull
EN
low or float for normal operation.
EN
has
an internal 200kΩ pulldown resistor.
Three-Level Input Pin. Connect TEMP to VL, GND, or leave floating. Sets maximum die temperature for
thermal regulation loop. Connection to GND = +90°C, floating = +100°C, VL = +130°C. TEMP is Hi-Z during
shutdown.
Li+ Battery Connection. Bypass BATT to GND with a capacitor of at least 1µF per ampere of charge current.
Charging Indicator, Open-Drain Output.
CHG
goes low (and can turn on an LED) when charging begins.
CHG
is high impedance when the battery current drops below 10% of the fast-charging current, or when
EN
is high. Connect a pullup resistor to the µP’s I/O voltage when interfacing with a µP logic input.
Exposed Pad. Connect exposed pad to a large copper trace for maximum power dissipation. The pad is
internally connected to GND.
5
EN
6
7
8
TEMP
BATT
CHG
—
PAD
_______________________________________________________________________________________
5
微控制器 MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
