HOME＞在庫検索＞在庫情報
MAX1757EAI
EVALUATION KIT AVAILABLE Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 14V Switch MAX1757 General Description Benefits and Features The MAX1757 is a switch-mode lithium-ion (Li+) battery charger that charges one to three cells. It provides a regulated charging current accurate to ±10% and a regulated voltage with only a ±0.8% total voltage error at the battery terminals. The internal high-side switch delivers a programmable current of up to 1.5A to charge the battery. The built-in safety timer automatically terminates charging once the adjustable time limit has been reached. The MAX1757 regulates the voltage set point and charging current using two loops that work together to transition smoothly between voltage and current regulation. An additional control loop monitors the total current drawn from the input source (charging + system) and by automatically reducing battery-charging current prevents overload of the input supply, allowing the use of a low-cost wall adapter. The per-cell battery regulation voltage is set between 4.0V and 4.4V using standard 1% resistors. The number of cells is set from 1 to 3 by pin strapping. Battery temperature is monitored by an external thermistor to prevent charging outside the acceptable temperature range. The MAX1757 is available in a space-saving 28-pin SSOP package. Use the MAX1757EVKIT to help reduce design time. For a stand-alone charger with a 28V switch, refer to the MAX1758 data sheet. For a charger controller capable of up to 4A charging current, refer to the MAX1737 data sheet. • Stand-Alone Charger Safely Charges Up to Three Li+ Applications • • • • Batteries • Continuous Voltage and Temperature Monitoring • Input Current Limiting • ±0.8% Battery Regulation Voltage Accuracy • Up to 1.5A Programmable Charge Current Low Power Consumption Extends Battery Life • 0.1μA Shutdown Battery Current • Low-Dropout 98% Duty Cycle Flexible Input Voltage Range Enables the Use of Low Cost Wall Adapters • Input Voltage Up to 14V • Precharges Near-Dead Cells Fixed 300kHz PWM Oscillator Allows Effective Noise Filtering 28-Pin SSOP Package Saves Board Space Ordering Information PART TEMP. RANGE -40°C to +85°C MAX1757EAI PIN-PACKAGE 28 SSOP Typical Operating Circuit VIN 6V to 14V Li+ Battery Packs Notebook Computers Hand-Held Instruments PDAs Desktop Cradle Chargers DCIN CSSP CSSN REF HSD MAX1757 ISETOUT Pin Configuration SYSTEM LOAD LX BST VL TOP VIEW ISETIN PGND VL 1 28 DCIN ISETTIN 2 27 CSSP CELL CS VADJ 26 CSSN ISETOUT 3 BATT 25 CCV THM 4 THM 24 CCI REF 5 GND 6 MAX1757 CCS 23 CCS VADJ 7 22 BST BATT 8 21 CS HSD 9 20 LX HSD 10 THERM 19 LX CCI 16 FULLCHG FAULT 14 15 FASTCHG SSOP 19-1754; Rev 2; 5/15 FULLCHG FAULT 17 SHDN TIMER2 13 TIMER1 18 PGND FASTCHG TIMER2 CELL 11 TIMER1 12 CCV ON OFF SHDN GND Li+ BATTERY 1 TO 3 CELLS
MAXIM
Maxim Integrated
U.S.A
アナログおよびミックスドシグナル半導体製品を設計、製造、販売している米国系の株式会社である。 マキシム・インテグレーテッドは、工業、通信、民生、コンピューティングの各市場向けに集積回路を開発しています
お買い上げ小計が１万円以上の場合は送料はサービスさせて頂きます。１万円未満の場合、また時間指定便はお客様負担となります。（送料は地域により異なります。）
