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MFG:MAX D/C:08+
Part Number: MAX1870AETJ
MFG: MAX
D/C: 08+
Description: The MAX1870A step-up/step-down multichemistry bat-tery charger charges with battery voltages above and...
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MAX1870AETJ
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DataSheet
General Description
MAX1870AETJ General Description
The MAX1870A step-up/step-down multichemistry bat-tery charger charges with battery voltages above and below the adapter voltage. This highly integratedcharger requires a minimum number of external compo-nents. The MAX1870A uses a proprietary step-up/step-down control scheme that provides efficient charging.Analog inputs control charge current and voltage, andcan be programmed by the host or hardwired.
The MAX1870A accurately charges two to four lithium-ion (Li+) series cells at greater than 4A. A programma-ble input current limit is included, which avoids overloading the AC adapter when supplying the load and the battery charger simultaneously. This reducesthe maximum adapter current, which reduces cost. The
MAX1870A provides analog outputs to monitor the cur-rent 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 con-sumes less than 1µA from the battery.
The MAX1870A is available in a 32-pin thin QFN (5mmx 5mm) package and is specified over the -40°C to+85°C extended temperature range. The MAX1870A evaluation k(MAX1870AEVKIT) is available to help reduce design time.
MAX1870AETJ Maximum Ratings
DCIN, CSSP, CSSS, CSSN,
VHP, VHN, DHI to GND......................................-0.3V to +30V
VHP, DHI to VHN .....................................................-0.3V to +6V
BATT, CSIP, CSIN, BLKP to GND..........................-0.3V to +20V
CSIP to CSIN, CSSP to CSSN,
CSSP to CSSS, PGND to GND..........................-0.3V to +0.3V
CCI, CCS, CCV, REF, IINP to GND..........-0.3V to (VLDO+ 0.3V)
DBST to GND..........................................-0.3V to (VDLOV+ 0.3V)
DLOV, VCTL, ICTL, REFIN, CELLS,
CLS, LDO, ASNS, SHDN to GND.........................-0.3V to +6V
LDO Current........................................................................50mA
Continuous Power Dissipation (TA= +70°C)
32-Pin Thin QFN 5mm x 5mm
(derate 21mW/°C above +70°C)......................................1.7W
Operating Temperature Range
MAX1870AETJ.................................................-40°C to +85°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
MAX1870AETJ Features
Patented Step-Up/Step-Down Control Scheme*
±0.5% Charge-Voltage Accuracy
±9% Charge-Current Accuracy
±8% Input Current-Limit Accuracy
Programmable Maximum Battery Charge Current
Analog Inputs Control Charge Current, Charge Voltage, and Input Current Limit
Analog Output Indicates Adapter Current
Input Voltage from 8V to 28V
Battery Voltage from 0 to 17.6V
Charges Li+ or NiCd/NiMH Batteries
Tiny 32-Pin Thin QFN (5mm x 5mm) Package
±0.5% Charge-Voltage Accuracy
±9% Charge-Current Accuracy
±8% Input Current-Limit Accuracy
Programmable Maximum Battery Charge Current
Analog Inputs Control Charge Current, Charge Voltage, and Input Current Limit
Analog Output Indicates Adapter Current
Input Voltage from 8V to 28V
Battery Voltage from 0 to 17.6V
Charges Li+ or NiCd/NiMH Batteries
Tiny 32-Pin Thin QFN (5mm x 5mm) Package
MAX1870AETJ Typical Application
Notebook and Subnotebook Computers Hand-Held Terminals
MAX1870AETJ Connection Diagram
MAX1870AETJ
PDF/DataSheet Download
- Datasheet: MAX1870AETJ
- File Size: 1117985 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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