MAX17015 Maxim Integrated Products, MAX17015 Datasheet - Page 11

• Manufacturer Part Number: MAX17015
• Description: (MAX17005 - MAX17015) High-Performance Chargers
• Manufacturer: Maxim Integrated Products

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Figure 2. Functional Diagram
The MAX17005/MAX17006/MAX17015 feature a volt-
age-regulation loop (CCV) and two current-regulation
loops (CCI and CCS). The loops operate independently
of each other. The CCV voltage-regulation loop moni-
tors BATT to ensure that its voltage never exceeds the
voltage set by VCTL. The CCI battery charge current-
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-
CSSN
CSSP
VCTL
BATT
CSIP
CSIN
GND
ISET
CC
V
AA
A = 17.5V/V
CSA
FILTER
PWM
A = 17.5V/V
SELECT
LOGIC
CELL
CSA
60mV
______________________________________________________________________________________
BDIV
GMS
CSI
GMV
GMI
2.8μA/mV
Gm =
26mV
VOLTAGE
LOWEST
CLAMP
High-Performance Chargers
VCTL + 100mV
IINP
V
AA
/2
ACIN
10mV
BDIV
110mV
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 MAX17005/MAX17006/MAX17015 have single-
point compensation. The two current loops are internal-
ly compensated while the voltage loop is compensated
with a series RC network at CC pin. See the CC Loop
Compensation section for the resistor and capacitor
selection. A functional diagram is shown in Figure 2.
SHUTDOWN
CHARGER
LDO
10mV
1.2MHz Low-Cost,
ACOK
IMIN
CCMP
IMAX
OVP
CONVERTER
BATT
POWER
DC-DC
FAIL
IZX
DCIN
LOW-SIDE
LEVEL
SHIFT
MAX17005
MAX17006
MAX17015
DRIVER
5.4V LINEAR
REGULATOR
LDO
REFERENCE
HIGH-SIDE
4.2V
DRIVER
LDO
BST
DHI
LX
DLO
PGND
V
AA
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