LTC1731-4.2 Linear Technology, LTC1731-4.2 Datasheet
LTC1731-4.2
Related parts for LTC1731-4.2
LTC1731-4.2 Summary of contents
Page 1
... Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.5V. The LTC1731-4.2 is available in the 8-pin MSOP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. 500mA Li-Ion Charger ...
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... MS8 PART MARKING 8-LEAD PLASTIC SO LTKQ T JMAX The denotes the specifications which apply over the full operating = unless otherwise noted CONDITIONS Charger On, Current Mode Shutdown Mode Sleep Mode (Battery Drain Current) LTC1731-4.2 (5V V 12V 19.6k 0.2 PROG SENSE R = 19.6k 0.2 PROG SENSE R = 97.6k ...
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... A CLAMP CC DRV DRIVE Note 2: The LTC1731-4.2 is guaranteed to meet performance specifications from Specifications over the – operating temperature range are assured by design, characterization and correlation with statistical process controls. Guaranteed I grade parts are available, consult factory. GND (Pin 4): Ground. ...
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... LTC1731-4.2 W BLOCK DIAGRA CHRG 2 C/10 100 A SHDN TIMER OSCILLATOR 3 C3 BATTERY CURRENT I = (2.457V • 800 )/(R BAT – STOP C/10 720 LOGIC SLP COUNTER V REF + + – – 2.5 A PROG 5 • PROG SENSE R PROG R SENSE SENSE 8 + 800 54mV – – – DRV ...
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... CHRG pin output is forced to a high impedance state. Shutdown The LTC1731-4.2 can be forced into shutdown by float- CC ing the PROG pin and allowing the internal 2.5 A current source to pull the pin above the 2.457V shutdown LTC1731-4 ...
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... A/mV. For every base current, a 1.6mV of gain error shows up at the inputs of CA. With R 19.6k (100mV across R error in charging current. Constant-Current Only Mode The LTC1731-4.2 can be used as a programmable current source by forcing the TIMER pin to V larly useful for charging NiMH or NiCd batteries. In the + V ...
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... Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0.014 – 0.019 0.050 (1.270) (0.355 – 0.483) BSC TYP LTC1731-4 500mA 1731 TA02 0.189 – 0.197* (4.801 – 5.004 0.228 – ...
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... FAX: (408) 434-0507 www.linear-tech.com Low Dropout Linear Charger V IN 4.5V Q1 1/2 Si9934DY R1 50k 7 R SENSE V CC 0.2 8 SENSE CHRG DRV 1/2 Si9934DY LTC1731-4 500mA BAT 3 1 TIMER BAT 5 PROG GND + R Li-ION PROG 4 19.6k CELL U Dimensions in inches (millimeters) unless otherwise noted. MS8 Package 8-Lead Plastic MSOP (LTC DWG # 05-08-1660) ...