ltc1732-8.4 Linear Technology Corporation, ltc1732-8.4 Datasheet
ltc1732-8.4
Related parts for ltc1732-8.4
ltc1732-8.4 Summary of contents
Page 1
... The LTC1732-8.4 begins a new charge cycle when a discharged battery is connected to the charger or when the input power is applied. In additon, if the battery remains connected to the charger and the cell voltage drops below 8.05V, a new charge cycle will begin. The LTC1732-8.4 is available in the 10-pin MSOP package 10V IN MBRM120T3 ...
Page 2
... LTC1732-8 ABSOLUTE MAXIMUM (Note 1) Input Supply Voltage (V ) ................................... 13.2V CC SENSE, DRV, BAT, SEL, TIMER, PROG, CHRG, ACPR ................. – 0.3V to 13.2V Operating Temperature Range (Note 2) .... – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T ...
Page 3
... Trickle Charge Current vs Temperature 19.6K PROG R = 0.2 SENSE BAT –50 – 100 125 TEMPERATURE ( C) 1732-8.4 G02 LTC1732-8.4 MIN TYP MAX UNITS 25 50 100 7.85 8.05 V Trickle Charge Threshold Voltage 4. 19.6K PROG 4.95 4.94 4.93 4.92 4.91 4.90 4 ...
Page 4
... LTC1732-8 TYPICAL PERFOR A CE CHARACTERISTICS Trickle Charge Threshold Voltage vs Temperature 4. 4.93 4.92 4.91 4.90 – –50 100 TEMPERATURE ( C) 1732-8.4 G04 Battery Charge Current 520 R = 19.6K PROG R = 0.2 SENSE BAT 510 500 490 480 (V) CC 1732-8.4 G07 Program Pin Voltage vs Temperature 2 ...
Page 5
... SENSE PROG ACPR (Pin 10): Wall Adapter Present Output. When the input voltage (wall adapter) is applied to the LTC1732-8.4, this pin is pulled to ground by an internal N-channel MOSFET which is capable of sinking 5mA to drive an external LED (See Applications Information Section). LTC1732-8.4 to ground. The charge current is I BAT • ...
Page 6
... C4 – – DRV CA + BAT – C2 LBO + 4.9V SEL* – REF 2.457V CHARGE GND 5 1732-8.4 BD *THE LTC1732-8.4 IS OPTIMIZED FOR 2-CELL (8.4V) Li-Ion BATTERIES. CONNECT THE SEL PIN FOR CHARGING 8.2V BATTERIES USING CC THE LTC1732, PLEASE CONTACT THE FACTORY R SENSE 17328f ...
Page 7
... For NiMH and NiCd batteries, the LTC1732-8.4 can be used as a current source by pulling the TIMER pin to V mode, the voltage amplifier, timer, C/10 comparator and the trickle charge function are all disabled ...
Page 8
... CHRG pin output is forced to a high impedance state. Shutdown The LTC1732-8.4 can be forced into shutdown by floating the PROG pin and allowing the internal 2.5 A current source to pull the pin above the 2.457V shutdown thresh- old voltage. The DRV pin is pulled external P-channel MOSFET ...
Page 9
... C/10 HIGH Hi-Z Stop Charging When the LTC1732-8 charge mode, the CHRG pin is pulled low by an internal N-channel MOSFET. To detect this mode, force the digital output pin, OUT, high and measure the voltage at the CHRG pin. The N-channel MOSFET will pull the pin low even with a 2k pull-up resistor ...
Page 10
... The LTC1732-8.4 can detect the insertion of a new battery. When a battery with voltage of less than 8.05V is inserted, the LTC1732-8.4 resets the timer and a new charge cycle begins. If the voltage of the new battery is above 8.05V, the charging will not start if the TIMER has already timed out. ...
Page 11
... BSC 4.88 0.10 DETAIL “A” (.192 .004) 0 – 6 TYP 0.53 0.01 (.021 .006) 1.10 (.043) DETAIL “A” MAX SEATING PLANE 0.17 – 0.27 (.007 – .011) LTC1732-8.4 0.497 0.076 (.0196 .003 REF 3.00 0.102 (.118 .004) NOTE 0.86 (.034) REF 0.13 0.05 (.005 .002) ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 V = 10V 1nF 10k 2 8 SEL ZTX749 CHRG SENSE LTC1732-8 DRV 2N5087 10 ACPR 1 BAT 6 4 TIMER PROG * + GND R PROG 5 19.6k *AVX 0603ZC104KAT1A COMMENTS Most Compact 1.5A, Charges NiCd, NiMH, Li-Ion Cells V Can Be Higher or Lower Than Battery Voltage, 1 ...