MAX1924XEEE Maxim Integrated Products, MAX1924XEEE Datasheet
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MAX1924XEEE
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MAX1924XEEE Summary of contents
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... TEMP RANGE MAX1894XEEE -40°C to +85°C MAX1924VEEE -40°C to +85°C MAX1924XEEE -40°C to +85°C *Contact factory for alternative threshold voltages. Typical Applications Circuits appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’ ...
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Advanced Li+ Battery-Pack Protectors ABSOLUTE MAXIMUM RATINGS SRC, IC2, IC3 BN.......................................-0.3V to +28V CC IC1 to BN ..................................................................-0.3V to +6V DSO, TKO, CGO to BN.............................-0. B4P to B3P ...............................................................-0.3V to +6V B3P to B2P ...............................................................-0.3V to ...
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Advanced Li+ Battery-Pack Protectors ELECTRICAL CHARACTERISTICS (continued 0.1V, each battery cell voltage (V SRC B4P Typical values are +25°C.) A PARAMETER SYMBOL Charge-Voltage Comparator Threshold for Resetting Discharge-Current Fault Latch Discharge-Voltage Comparator Threshold ...
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Advanced Li+ Battery-Pack Protectors ELECTRICAL CHARACTERISTICS ( 0.1V, each battery cell voltage (V SRC B4P PARAMETER SYMBOL SRC Input Current Supply Current (Note 1) I Shutdown Supply Current I SHDN Charge-Mode Detection Threshold Overvoltage Threshold (Note 4) ...
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Advanced Li+ Battery-Pack Protectors (T = +25°C, unless otherwise noted.) A SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 1.2 1.1 1.0 4-SERIES BATTERY PACK 0.9 0.8 0.7 0.6 0.5 0.4 -40 - TEMPERATURE (°C) OVERVOLTAGE THRESHOLD vs. TEMPERATURE ...
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Advanced Li+ Battery-Pack Protectors (T = +25°C, unless otherwise noted.) A DISCHARGE-CURRENT FAULT TIMING MAX1894 toc10 V PKN 100mV/div 0 DSO 5V/div 0 1ms/div PIN NAME 1 B4P Cell 4 Positive Connection. Short B4P to B3P for MAX1924V. Supply Input. ...
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Advanced Li+ Battery-Pack Protectors Detailed Description The MAX1894/MAX1924 battery-pack protectors super- vise the charging and discharging process of Li+ cells. Designed for 3-series (MAX1924V) and 4-series (MAX1894X/MAX1924X) applications, these devices monitor the voltage across each cell to provide protec- tion ...
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Advanced Li+ Battery-Pack Protectors OVERDISCHARGE PROTECTION PACK + R TKO 510Ω PACK - Figure 1. Typical Applications Circuit with Trickle Charge the direction of current flow. To reverse the current flow, the charger has to be removed (Figure 5). The ...
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Advanced Li+ Battery-Pack Protectors V DSO, CGO, TKO = H NO RESET UVF LATCH UVF = UVF + 1 NO RESET OVF LATCH OVF = OVF + 1 MAX1924 V = 200mV OV_HYT MAX1894 OV_HYT YES TKO, ...
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Advanced Li+ Battery-Pack Protectors CELL VOLTAGE SAMPLING DSO, CGO, TKO OVERVOLTAGE THRESHOLD CELL VOLTAGE SAMPLING TKO, CGO OVERVOLTAGE THRESHOLD CELL VOLTAGE OVERVOLTAGE THRESHOLD HYSTERESIS SAMPLING TKO, CGO Figure 4. Undervoltage and Overvoltage Timing Diagrams 10 ______________________________________________________________________________________ UNDERVOLTAGE CONDITION 320ms UNDERVOLTAGE ...
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Advanced Li+ Battery-Pack Protectors NORMAL OPERATION OC FAULT NO V < V RSENSE OC_TH FOR 3ms YES TKO, CGO = > 0.1V B4P SRC Figure 5. Charge-Current Fault Set the nominal values of the trickle ...
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Advanced Li+ Battery-Pack Protectors Table 2. State Table STATE CTL STATE L Undervoltage L Overvoltage L Charge Current Fault L Discharge Current Fault L Pack Short Current L Fault X Forced Shutdown by External µP X CTL H Deep Discharge ...
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Advanced Li+ Battery-Pack Protectors Table 3. MOSFET Selection P-CHANNEL MAXIMUM DRAIN MOSFETS IRF7404 IRF7406 Si4431 Si4947 (dual) Protecting and Filtering Cell Inputs Resistors in series with each B_P pin are recommend limit the current in case there is ...
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Advanced Li+ Battery-Pack Protectors B4P B3P SELECTOR B2P B1P OVER AND UNDER THRESHOLDS REF PKN BN B4P SRC Figure 8. Simplified Functional Diagram 14 ______________________________________________________________________________________ SHDN CELL CLOCK RDY OV FAULT STATE CMP MACHINE UV FAULT HYSTERESIS CMP +145mV CHARGE ...
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Advanced Li+ Battery-Pack Protectors OVERDISCHARGE PROTECTION PACK + PACK - Figure 9. Typical Applications Circuit without Trickle Charge ______________________________________________________________________________________ R5 10Ω 16 SRC 15 DSO OVERCHARGE 14 PROTECTION CGO 13 TKO D1 2 CMPSH B4P R4 C6 ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...