R5641L Series 2 to 4 Serial Cell Li-ion Battery Protection IC for Secondary Protection NO.EA-426-181212 OVERVIEW The R5641L is an overcharge protection IC for 2- to 4-series cell Li-ion / Li-polymer rechargeable battery pack, with built-in high-accuracy voltage detection circuits and delay circuits. Controlling the supply voltage to the CTLC pin can control the COUT pin output. The shutdown detection can reduce the supply current to the minimum. KEY BENEFITS Reducing the supply current to 0.2 A or less after shutdown detection can achieve the longer battery life. Temperature protection enabled with an external PTC thermistor. Be adaptable to 30 V input voltage by using high-voltage process. OPTIONAL FUNCTIONS KEY SPECIFICATIONS User-selectable Delay Time and (1) Overcharge Detection Voltage (VDET1n ) 4.10 V to 4.60 V (5 mV step) Function Overcharge Detection Voltage Accuracy 0.016 V (Ta = 25C) Code Overcharge Detection 0.025 V (0C < Ta < 60C) Delay Time ( ) (1) (2) Overcharge Release Voltage(VREL1n ) VDET1n -0V to VDET1n -0.4V A 2 sec (50mV step) B 4 sec Overcharge Detection Delay Time 2- / 4- / 6-sec C 6 sec Release Condition: Voltage Release Type Low Supply Current Typ.2.8 A Code CTLC Timer Reset Shutdown Current Max. 0.2 A () at Shutdown Delay Shutdown Detection Voltage Typ. 2.5 V 0.3 V / 3.7 V 0.3 V C Disable Disable 2 to 4 Cells Selectable Battery Protection by External Wirings D Enable Disable Selectable Timer Reset Delay Function E Disable Enable Temperature Protection with External PTC Thermistor F Enable Enable CTLC Pin Detection Delay Time 2 msec PACKAGE Output Type CMOS Output TYPICAL APPLICATION CIRCUIT DFN2020-8C 2.0 mm x 2.0 mm x 0.6 mm APPLICATIONS Li-Ion or Li-Polymer Battery Protection 4-cell Protection Circuit with PTC Thermistor (1) V V : n =1, 2, 3, 4 DET1n, REL1n (2) Min. 4.05 V when shutdown detection voltage (VSHTn) is 3.7 V. 1 R5641L NO.EA-426-181212 SELECTION GUIDE Overcharge detection / release voltages and delay time are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free DFN2020-8C 3,000 pcs Yes Yes R5641Lxxx -TR xxx: Specify the combination of the overcharge detection voltage (V ), the overcharge release voltage DET1n (1) (V ), and the shutdown detection voltage (V ) . REL1n SHTn (2) V : 4.1 V to 4.6 V in 5 mV step DET1n (1) (3) V : V 0V to V 0.4V in 50 mV step REL1n DET1n DET1n (1) V : 2.5V / 3.7 V SHTn : Specify the delay time code defined a combination of the overcharge detection delay time (t ), the VDET1 overcharge release delay time (t ), and the CTLC detection delay time (t ). VREL1 CDET Code t (s) t (ms) t (ms) VDET1 VREL1 CDET A 2 16.5 2 B 4 16.5 2 C 6 16.5 2 : Specify the CTLC function and the timer reset delay function. Code CTLC Function at Shutdown Timer Reset Delay Function C Disable Disable D Enable Disable E Disable Enable F Enable Enable (1) Refer to Product Code Table for details. (2) V V V : n =1, 2, 3, 4 DET1n, REL1n, SHTn (3) Min. 4.05 V when shutdown detection voltage (VSHTn) is 3.7 V. 2