R5487L/R5497L Series 1 Cell Li-ion/Li-polymer Protector NO. EA-357-191125 OUTLINE The R5487L/R5497L Series are high voltage tolerance CMOS-based protection IC for over-charge/discharge and over-current of rechargeable one-cell Lithium-ion (Li+)/Lithium polymer battery. The R5487L/R5497L Series can detect over-charge/discharge of Li+ one-cell and excess load current, further include a short circuit protector for preventing large external short circuit current and the excess charge-current. The R5487L/R5497L Series are composed of four voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits. The output of Over-charge detector or Excess charge-current detector switches to level after internally fixed delay time, when charged voltage crosses the detector threshold from a low value to a high value. They have two types to release Over-charge detector. The one is calledLatch typ. The output of COUT switches to when a kind of load is connected to battery pack after a charger is disconnected from the battery pack, and the cell voltage becomes lower than over-charge detector threshold. The other is calledAuto Release typ. The output of COUT switches to, when the cell voltage is lower than over-charge detector release threshold, or by disconnecting a charger when the battery voltage is lower than over-charge detector threshold. The output of Over-discharge detector or Excess discharge-current detector switches to level after internally fixed delay time, when discharged voltage crosses the detector threshold from a high value to a value lower than VDET2. They have two types to release Over-discharge detector. The one is calledLatch typ. In the case that a charger is connected to the battery pack, and V level is more than over-discharge detector threshold, the DD output level of D becomes H immediately. The other is calledAuto Release typ. In the case that a OUT charger is connected to the battery pack, and V level is more than over-discharge detector threshold, the DD output level of D becomes H immediately. Without connecting a charger, if V pin voltage is equal or OUT DD more than the released voltage from over-discharge, the output level of D becomes H. OUT An excess discharge-current and short circuit state can be sensed and cut off through the built in excess current detector with DOUT being enabled to low level. Once after detecting excess discharge-current or short circuit is released and DOUT level switches to high by detaching a load system from a battery pack. After detecting over-discharge, supply current will be kept extremely low by halting internal circuits operation. When the output of COUT is, if V- pin level is set at VSS2V or lower, the delay time of detector can be shortened. Especially, the delay time of over-charge detector can be reduced into approximately 1/60. Therefore, testing time of protector circuit board can be reduced. Output type of COUT and DOUT are CMOS. The R5487L/R5497L Series have DFN1414-6B and DFN1814-6B. 1 R5487L/R5497L NO. EA-357-191125 FEATURES Manufactured with High Voltage Tolerant Process Absolute Maximum Rating ..................................... 30 V Low Supply Current Supply current (At normal mode) ............................. Typ. 3.0 A At detecting over-discharge ..................................... Max. 0.1 A (Over-discharge Latch type) Max. 0.5 A (Over-discharge Auto-release type) High Accuracy Detector Threshold Over-charge detector ............................................... 20 mV (Ta = 25C) 25 mV (-20C Ta 60C) Over-discharge detector .......................................... 35 mV Excess discharge-current detector (VDET3) ........... 10 mV (V 0.100 V) DET3 10% (0.050 V V < 0.100 V) DET31 5 mV (V < 0.050 V) DET31 Excess charge-current detector (VDET4) ................ 10% (V 0.05 V) DET4 5 mV (V > 0.05 V) DET4 Variety of Detector Threshold Over-charge detector threshold ............................... 4.2 V to 4.6 V, 0.005 V step Over-discharge detector threshold .......................... 2.0 V to 3.0 V, 0.100 V step Over-discharge release threshold ............................ 2.4 V to 3.2 V, 0.100 V step Excess discharge-current threshold ........................ 0.025 V to 0.15 V, 0.001 V step Vshort threshold ....................................................... 0.15 V to 0.40 V, 0.005 V step Excess charge-current threshold ........................ 0.15 V to 0.02 V, 0.001 V step Internal Fixed Output Delay Time Over-charge detector Output Delay ......................... 1.0 s Over-discharge detector Output Delay .................... 20 ms Excess discharge-current detector Output Delay .. 12 ms Excess charge-current detector Output Delay ....... 8 ms Short Circuit detector Output Delay ....................... 250 s Output Delay Time Shortening Function At C is, if V- level is set at typically 2V, the Output Delay time of all items except short-circuit can be OUT reduced (Delay Time for over-charge becomes about 1/60 of normal state). Selectable Functions 0V-battery charge option .......................................... Acceptable/Unacceptable Conditions for release over-charge detector ............ Latch type/Auto Release type Conditions for release over-discharge detector ..... Latch type/Auto Release type (1) Conditions for release short-current detector ......... Type 1/Type 2 Ultra Small Package The R5487L/R5497L Series have DFN1414-6B and DFN1814-6B. (1) Load Resistance Threshold for release from Over-Discharge Current Status (Ta = 25C) Type 1: more than 300 k Type 2: more than 25 k 2