Product Summary

The MAX1737 is a switch-mode lithium-ion (Li+) battery charger that charges one to four cells. The MAX1737 provides a regulated charging current and a regulated voltage with only a ±0.8% total voltage error at the battery terminals. The external N-channel switch and synchronous rectifier provide high efficiency over a wide input voltage range. A built-in safety timer automatically terminates charging once the adjustable time limit has been reached. Applications are (1)Notebook Computers; (2)Hand-Held Instruments; (3)Li+ Battery Packs; (4)Desktop Cradle Chargers.

Parametrics

MAX1737 absolute maximum ratings: (1)CSSP, CSSN, DCIN to GND: -0.3V to +30V; (2)BST, DHI to GND: -0.3V to +36V; (3)BST to LX: -0.3V to +6V; (4)DHI to LX : -0.3V to ((BST - LX)+ 0.3V); (5)LX to GND: -0.3V to (CSSN + 0.3V); (6)FULLCHG, FASTCHG, FAULT to GND: -0.3V to +30V; (7)VL, VLO, SHDN, CELL, TIMER1, TIMER2, CCI, CCS, CCV, REF, ISETIN, ISETOUT, VADJ, THM to GND: -0.3V to +6V; (8)DLO to GND: -0.3V to (VLO + 0.3V); (9)BATT, CS to GND: -0.3V to +20V; (10)PGND to GND, CSSP to CSSN: -0.3V to +0.3V; (11)VL to VLO: -0.3V to +0.3V; (12)VL Source Current: 50mA; (13)Continuous Power Dissipation (TA = +70°C)28-Pin QSOP (derate 10.8mW/°C above +70°C): 860mW; (14)Operating Temperature Range: -40°C to +85°C; (15)Junction Temperature: +150°C; (16)Storage Temperature Range: -65°C to +150°C; (17)Lead Temperature (soldering, 10s): +300°C.

Features

MAX1737 features: (1)Stand-Alone Charger for Up to Four Li+ Cells; (2)±0.8% Accurate Battery Regulation Voltage; (3)Low Dropout: 98% Duty Cycle; (4)Safely Precharges Near-Dead Cells; (5)Continuous Voltage and Temperature Monitoring; (6)<1μA Shutdown Battery Current; (7)Input Voltage Up to +28V; (8)Safety Timer Prevents Overcharging; (9)Input Current Limiting; (10)Space-Saving 28-Pin QSOP; (11)300kHz PWM Oscillator Reduces Noise; (12)90% Conversion Efficiency.

Diagrams

MAX1737 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MAX1737EVKIT
MAX1737EVKIT
Maxim Integrated Products
Battery Management Evaluation Kit for the MAX1737
Data Sheet
Negotiable 
MAX1737EEI-T
MAX1737EEI-T
Maxim Integrated Products
Battery Management Stand-Alone Switch-M L-Ion Battery Chargr
Data Sheet
Negotiable 
MAX1737EEI+T
MAX1737EEI+T
Maxim Integrated Products
Battery Management Stand-Alone Switch-M L-Ion Battery Chargr
Data Sheet
0-1965: $1.97
1965-2500: $1.97
MAX1737EEI+
MAX1737EEI+
Maxim Integrated Products
Battery Management Stand-Alone Switch-M L-Ion Battery Chargr
Data Sheet
0-1: $4.49
1-25: $3.01
25-50: $2.18
50-100: $2.15
MAX1737EEI
MAX1737EEI
Maxim Integrated Products
Battery Management Stand-Alone Switch-M L-Ion Battery Chargr
Data Sheet
Negotiable 
MAX1737
MAX1737
Other

Data Sheet
Negotiable