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MFG:1400
Part Number: MAX1772
MFG: 1400
Description: The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the cons...
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MAX1772
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DataSheet
General Description
MAX1772 General Description
The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification.
Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.
The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.
MAX1772 Maximum Ratings
DCIN, CSSP, CSSN to GND.....................................-0.3V to +30V
BST to GND............................................................-0.3V to +36V
BST to LX.................................................................-0.3V to +6V
DHI to LX ...................................................-0.3V to (BST + 0.3V)
LX to GND ................................................................-6V to +30V
BATT, CSIP, CSIN to GND.........................................-0.3V to 20V
CSIP to CSIN or CSSP to CSSN or
PGND to GND ...............................-0.3V to +0.3V
CCI, CCS, CCV, DLO, ICHG, IINP,
ACIN, REF to GND ................................-0.3V to (VLDO + 0.3V)
DLOV, VCTL, ICTL, REFIN, CELLS,
CLS, LDO, ACOK to GND ......................................-0.3V to +6V
DLOV to LDO........................................................-0.3V to +0.3V
DLO to PGND...........................................-0.3V to (DLOV + 0.3V)
LDO Short-Circuit Current .................................................50mA
Continuous Power Dissipation (TA = +70)
28-Pin QSOP (derate 10.8mW/°C above +70)........860mW
Operating Temperature Range
MAX1772EEI.....................................................-40 to +85
Junction Temperature .......................................................150
Storage Temperature Range ............................-60 to +150
Lead Temperature (soldering, 10s) ................................+300
BST to GND............................................................-0.3V to +36V
BST to LX.................................................................-0.3V to +6V
DHI to LX ...................................................-0.3V to (BST + 0.3V)
LX to GND ................................................................-6V to +30V
BATT, CSIP, CSIN to GND.........................................-0.3V to 20V
CSIP to CSIN or CSSP to CSSN or
PGND to GND ...............................-0.3V to +0.3V
CCI, CCS, CCV, DLO, ICHG, IINP,
ACIN, REF to GND ................................-0.3V to (VLDO + 0.3V)
DLOV, VCTL, ICTL, REFIN, CELLS,
CLS, LDO, ACOK to GND ......................................-0.3V to +6V
DLOV to LDO........................................................-0.3V to +0.3V
DLO to PGND...........................................-0.3V to (DLOV + 0.3V)
LDO Short-Circuit Current .................................................50mA
Continuous Power Dissipation (TA = +70)
28-Pin QSOP (derate 10.8mW/°C above +70)........860mW
Operating Temperature Range
MAX1772EEI.....................................................-40 to +85
Junction Temperature .......................................................150
Storage Temperature Range ............................-60 to +150
Lead Temperature (soldering, 10s) ................................+300
MAX1772 Features
* Input Current Limiting
* ±0.5% Output Voltage Accuracy Using Internal
Reference (0 to +85)
* Programmable Battery Charge Current >4A
* Analog Inputs Control Charge Current and
Charge Voltage
* Monitor Outputs for:
Current Drawn from AC Input Source
Charging Current
AC Adapter Present
* Up to 18.2V (max) Battery Voltage
* 8V to 28V Input Voltage
* >95% Efficiency
* 99.99% (max) Duty Cycle for Low-Dropout
Operation
* Charges Any Battery Chemistry: Li+, NiCd, NiMH,
Lead Acid, etc.
* ±0.5% Output Voltage Accuracy Using Internal
Reference (0 to +85)
* Programmable Battery Charge Current >4A
* Analog Inputs Control Charge Current and
Charge Voltage
* Monitor Outputs for:
Current Drawn from AC Input Source
Charging Current
AC Adapter Present
* Up to 18.2V (max) Battery Voltage
* 8V to 28V Input Voltage
* >95% Efficiency
* 99.99% (max) Duty Cycle for Low-Dropout
Operation
* Charges Any Battery Chemistry: Li+, NiCd, NiMH,
Lead Acid, etc.
MAX1772 Typical Application
* Notebook and Subnotebook Computers
* Personal Digital Assistants
* Hand-Held Terminals
* Personal Digital Assistants
* Hand-Held Terminals
MAX1772 Connection Diagram
MAX1772
PDF/DataSheet Download
- Datasheet: MAX1772
- File Size: 289100 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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