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MAX1870AETJ+

Description
battery management Li+ step Up/step down battery charger
CategoryPower/power management    The power supply circuit   
File Size1MB,33 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX1870AETJ+ Overview

battery management Li+ step Up/step down battery charger

MAX1870AETJ+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
Parts packaging codeQFN
package instructionHVQCCN, LCC32,.2SQ,20
Contacts32
Reach Compliance Codecompli
ECCN codeEAR99
Is SamacsysN
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-XQCC-N32
JESD-609 codee3
length5 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals32
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC32,.2SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
power supply18 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply voltage (Vsup)28 V
Minimum supply voltage (Vsup)8 V
Nominal supply voltage (Vsup)18 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature30
width5 mm
Base Number Matches1
EVALUATION KIT AVAILABLE
MAX1870A
Step-Up/Step-Down
Li+ Battery Charger
General Description
The MAX1870A step-up/step-down multichemistry
battery charger charges with battery voltages above
and below the adapter voltage. This highly integrated
charger requires a minimum number of external com-
ponents. The MAX1870A uses a proprietary step-up/
step-down control scheme that provides effi-
cient charging. Analog inputs control charge current
and voltage, and can be programmed by the host or
hardwired.
The MAX1870A accurately charges two to four lithium-
ion (Li+) series cells at greater than 4A. A program-
mable input current limit is included, which avoids over-
loading the AC adapter when supplying the load and
the battery charger simultaneously. This reduces the
maximum adapter current, which reduces cost. The
MAX1870A provides analog outputs to monitor the
current drawn from the AC adapter and charge current.
A digital output indicates the presence of an AC adapter.
When the adapter is removed, the MAX1870A consumes
less than 1µA from the battery.
The MAX1870A is available in a 32-pin thin QFN
(5mm x 5mm) package and is specified over the
-40°C to +85°C extended temperature range. The
MAX1870A evaluation kit (MAX1870AEVKIT) is available
to help reduce design time.
Benefits and Features
Highly Flexible Input Voltage Range Works with
Affordable AC Adapters
• Step-Up/Step-Down Control Scheme
• Input Voltage from 8V to 28V
• Analog Output Indicates Adapter Current
Accurately Charge Li+ or NiCd/NiMH Batteries
• Battery Voltage from 0V to 17.6V
• ±0.5% Charge-Voltage Accuracy
• ±9% Charge-Current Accuracy
• ±8% Input Current-Limit Accuracy
Tune Design to Increase Safety and Efficiency
• Programmable Maximum Battery Charge Current
• Analog Inputs Control-Charge Current, Charge
Voltage, and Input-Current Limit
32-Pin Thin QFN (5mm x 5mm) Package Saves
Space while Supporting Step-Up and Step-Down
Operation
Typical Operating Circuit
FROM WALL ADAPTER
SYSTEM
LOAD
CSSS
DCIN
VHP
VHN
REF
CLS
CELLS
ASNS
IINP
DBST
CSIP
CSIN
REFIN
SHDN
ICTL
VCTL
LDO
PGND
DLOV
GND
BATT
BLKP
N
CSSP
CSSN
Applications
MAX1870A
DHI
P
Notebook and Subnotebook Computers
Handheld Terminals
Ordering Information
appears at end of data sheet.
19-3243; Rev 3; 8/15

MAX1870AETJ+ Related Products

MAX1870AETJ+ MAX1870AETJ+T
Description battery management Li+ step Up/step down battery charger battery management Li+ step Up/step down battery charger
Is it lead-free? Lead free Lead free
Is it Rohs certified? conform to conform to
package instruction HVQCCN, LCC32,.2SQ,20 QCCN, LCC32,.2SQ,20
Reach Compliance Code compli compliant
ECCN code EAR99 EAR99
JESD-30 code S-XQCC-N32 S-PQCC-N32
Number of terminals 32 32
Maximum operating temperature 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C
Package body material UNSPECIFIED PLASTIC/EPOXY
encapsulated code HVQCCN QCCN
Encapsulate equivalent code LCC32,.2SQ,20 LCC32,.2SQ,20
Package shape SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER
power supply 18 V 18 V
Certification status Not Qualified Not Qualified
Nominal supply voltage (Vsup) 18 V 18 V
surface mount YES YES
technology BICMOS BICMOS
Temperature level INDUSTRIAL INDUSTRIAL
Terminal form NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm
Terminal location QUAD QUAD
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