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PDF MAX17015B Data sheet ( Hoja de datos )
| Número de pieza | MAX17015B | |
| Descripción | (MAX17005B - MAX17015B) Highest Switching-Frequency Notebook Battery Chargers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4576; Rev 0; 4/09
www.DataSheet4U.com
EVAALVUAAILTAIOBNLEKIT
1.2MHz, Low-Cost,
High-Performance Chargers
General Description
The MAX17005B/MAX17006B/MAX17015B are high-fre-
quency multichemistry battery chargers. These circuits
feature a new high-frequency current-mode architecture
that significantly reduces component size and cost*.
The charger uses a high-side MOSFET with n-channel
synchronous rectifier. Widely adjustable charge current,
charge voltage, and input current limit simplify the con-
struction of highly accurate and efficient chargers.
The charge voltage and charge current are set with
analog control inputs. The charge current setting can
also be adjusted with a PWM input. High-accuracy cur-
rent-sense amplifiers provide fast cycle-by-cycle cur-
rent-mode control to protect against short circuits to the
battery and respond quickly to system load transients.
In addition, the charger provides a high-accuracy ana-
log output that is proportional to the adapter current. In
the MAX17015B, this current monitor remains active
when the adapter is absent to monitor battery dis-
charge current.
The MAX17005B charges three or four Li+ series cells,
and the MAX17006B charges two or three Li+ series
cells. The MAX17015B adjusts the charge voltage set-
ting and the number of cells through a feedback resis-
tor-divider from the output. All variants of the charger
can provide at least 4A of charge current with a 10mΩ
sense resistor.
The charger utilizes a charge pump to control an n-channel
adapter selection switch. The charge pump remains
active even when the charger is off. When the adapter
is absent, a p-channel MOSFET selects the battery.
The MAX17005B/MAX17006B/MAX17015B are avail-
able in a small, 4mm x 4mm x 0.8mm 20-pin, lead-free
TQFN package. An evaluation kit is available to reduce
design time.
Applications
Notebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
Features
o High Switching Frequency (1.2MHz)
o Controlled Inductor Current-Ripple Architecture
Reduced BOM Cost
Small Inductor and Output Capacitors
o ±0.4% Accurate Charge Voltage
o ±2.5% Accurate Input-Current Limiting
o ±3% Accurate Charge Current
o Single-Point Compensation
o Monitor Outputs for
±2.5% Accurate Input Current Limit
±2.5% Battery Discharge Current
(MAX17015B Only)
AC Adapter Detection
o Analog/PWM Adjustable Charge-Current Setting
o Battery Voltage Adjustable for 3 and 4 Cells
(MAX17005B) or 2 and 3 Cells (MAX17006B)
o Adjustable Battery Voltage (4.2V to 4.4V/Cell)
o Cycle-by-Cycle Current Limit
Battery Short-Circuit Protection
Fast Response for Pulse Charging
Fast System-Load-Transient Response
o Programmable Charge Current < 5A
o Automatic System Power Source Selection with
n-Channel MOSFET
o Internal Boost Diode
o +8V to +26V Input Voltage Range
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX17005BETP+
-40°C to +85°C 20 TQFN-EP**
MAX17006BETP+
-40°C to +85°C 20 TQFN-EP**
MAX17015BETP+
-40°C to +85°C 20 TQFN-EP**
+Denotes a lead(Pb)-free/RoHS-compliant package.
**EP = Exposed pad.
*Patent pending.
Pin Configuration and Minimal Operating Circuit appear at
end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
www.DataSheet4U.com
1.2MHz, Low-Cost,
High-Performance Chargers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 19V, VBATT = VCSIP = VCSIN = 16.8V, VVCTL = VAA, VISET = 1V, TA = -40°C to +85°C,
unless otherwise noted.)
PARAMETER
CHARGE-CURRENT REGULATION
ISET Range
Full Charge-Current Accuracy
(CSIP to CSIN)
Trickle Charge-Current Accuracy
Charge-Current Gain Error
Charge-Current Offset Error
BATT/CSIP/CSIN Input-Voltage Range
ISET Power-Down Mode Threshold
ISET PWM Threshold
ISET Frequency
INPUT-CURRENT REGULATION
Input Current-Limit Threshold
CSSN Input Bias Current
CSSP/CSSN Input-Voltage Range
IINP Transconductance
IINP Accuracy
SUPPLY AND LINEAR REGULATOR
DCIN Input-Voltage Range
DCIN UVLO Trip-Point
DCIN + CSSP + CSSN Quiescent Current
(Note 2)
BATT + CSIP + CSIN + LX Input Current
(Note 2)
LDO Output Voltage
LDO Load Regulation
LDO UVLO Threshold
CONDITIONS
MIN TYP MAX UNITS
VISET = VAA/4 or
ISET = 99.9% duty cycle
VBATT = 1V to 16.8V
VISET = VAA/6 or
ISET = 66.7% duty cycle
VISET = VAA/80 or
ISET = 5% duty cycle
Based on VISET = VVAA/4 and VISET = VVAA/80
Based on VISET = VVAA/4 and VISET = VVAA/80
ISET falling
ISET rising
Rising
Falling
0
57.5
-4.2
38
-5
1.4
-52
-2
-1.4
0
21
33
0.8
0.128
VAA/2
62.5
+4.2
42
+5
4.6
+52
+2
+1.4
24
31
47
2.4
V
mV
%
mV
%
mV
%
%
mV
V
mV
V
500 kHz
VCSSP - VCSSN
Adapter present
VCSSP - VCSSN = 60mV
VCSSP - VCSSN = 60mV, VIINP = 0 to 4.5V
VCSSP - VCSSN = 35mV
DCIN falling
DCIN rising
Adapter present
Adapter absent
VBATT = 16.8V
Adapter absent
Charger shutdown
VBATT = 2V to 19V, adapter present
8.0V < VDCIN < 26V, no load
0 < ILDO < 40mA
58.2
-3
-2
8.0
2.66
-2.5
-2.5
8
7.9
5.15
3.2
61.8
+3
+2
26.0
2.94
+2.5
+2.5
mV
%
μA
V
μA/mV
%
26
8.9
6
50
20
20
500
5.55
200
5.0
V
V
mA
μA
μA
V
mV
V
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
1.2MHz, Low-Cost,
High-Performance Chargers
IINP ACIN
ACOK
CSSP
CSSN
CSA
A = 17.5V/V
AGND
CC
BATT
VCTL
60mV
GMS
CELL
SELECT
LOGIC
BDIV
GMV
VAA
CSIP
CSA
A = 17.5V/V
CSIN
CSI
GMI
Gm =
2.8μA/mV
VAA/2
LDO
VCTL + 100mV
BDIV
10mV
LOWEST
VOLTAGE
CLAMP
110mV
BATT DCIN
4.2V
REFERENCE
VAA
POWER
FAIL
OVP
IMIN
DC-DC
CONVERTER
CCMP
IMAX
IZX
5.4V LINEAR
REGULATOR
LEVEL
SHIFT
HIGH-SIDE
DRIVER
LDO
LOW-SIDE
DRIVER
LDO
BST
DHI
LX
DLO
PGND
PWM
FILTER
ISET
26mV
CHARGER 10mV
SHUTDOWN
MAX17005B
MAX17006B
MAX17015B
Figure 2. Functional Diagram
The MAX17005B/MAX17006B/MAX17015B feature a
voltage-regulation loop (CCV) and two current-regula-
tion loops (CCI and CCS). The loops operate indepen-
dently of each other. The CCV voltage-regulation loop
monitors BATT to ensure that its voltage never exceeds
the voltage set by VCTL. The CCI battery charge cur-
rent-regulation loop monitors current delivered to BATT
to ensure that it never exceeds the current limit set by
ISET. The charge current-regulation loop is in control as
long as the battery voltage is below the set point. When
the battery voltage reaches its set point, the voltage-
regulation loop takes control and maintains the battery
voltage at the set point. A third loop (CCS) takes control
and reduces the charge current when the adapter cur-
rent exceeds the input current limit.
The MAX17005B/MAX17006B/MAX17015B have single-
point compensation. The two current loops are internal-
ly compensated while the voltage loop is compensated
with a capacitor at CC pin. A functional diagram is
shown in Figure 2.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MAX17015B.PDF ] | |
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