R5439K Series 2 to 4 Serial Cell Li-Ion or Li-Polymer Battery Protection IC for Secondary Protection NO.EA-349-201105 OUTLINE The R5439K is an overcharge protection IC for 2 to 4 serial cell Li-ion or Li-polymer secondary battery. Internally, the R5439K consists of high-accuracy voltage detection circuit, a delay circuit, and a voltage regulator for operating the external real-time clock. The two-stage shut-down detection circuit can reduce the supply current to the minimum. FEATURES High Voltage Tolerant Process Absolute Maximum Ratings 32 V Low Supply Current During Operation, Cell-voltage: 4.15 V, 4-Cells Typ. 4.0 A Shutdown 1 Typ. 2.5 A Shutdown 2 (Standby) Max. 0.2 A Output Voltage Built-in Regulator 2.9 V to 3.7 V, 0.1 V step Output Voltage Accuracy 2% COUT Output (CMOS Output, Active-high) Typ. 4.7 V High-accuracy Voltage Detection (1) Overcharge Detector Threshold (V ) 4.20 V to 4.65 V, in 5 mV step DET1n Overcharge Detector Threshold Accuracy 0.02 V (Ta = 25C) 0.025 V (0C < Ta < 60C) (1) Overcharge Release Voltage (V ) V 0V to V 0.4V, in 50 mV step REL1n DET1n DET1n Min.4.15V (2) Overcharge Detection Delay Time 2-, 4-, or 6-sec with Delay Time Shortening Function Overcharge Release Voltage Condition Voltage Release Type Shutdown Functions Shutdown 1 Shutdown 1 Detector Threshold Typ. 3.8 V, 0.3 V Shutdown 1 Detection Delay Time none Shutdown 2 (1) Shutdown 2 Detector Threshold (V ) 2.3 V to 2.8 V, 100 mV step SHT2n Shutdown 2 Detector Threshold Accuracy 0.05 V Shutdown 2 Release Voltage V + 0.2 V SHT2n Shutdown 2 Detection Delay Time 2-, 4-, or 6-sec 2 to 4 Cells Selectable Battery Protection Timer Reset Delay Function Compact Package DFN (PLP) 2020-8 2.0 mm x 2.0 mm (1) VDET1n, VREL1n VSHT2n : n =1, 2, 3, 4 (2) The delay time can be reduced down to approx. 1/80 by applying a 4 V 0.2 V to the VDD VC1 pins. 1 R5439K NO.EA-349-201105 APPLICATIONS Li-Ion or Li-Polymer Battery Protection SELECTION GUIDE The overcharge and the delay time are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R5439Kxxx -TR DFN (PLP) 2020-8 5,000 pcs Yes Yes xxx: Specify the combination of the overcharge detector threshold (VDET1n), the overcharge release voltage (VREL1n), the shutdown 2 detector threshold (VSHT2n) and the voltage regulator output voltage (VROUT) (1) . (2) VDET1n : 4.20 V to 4.65 V in 5 mV step (2) VREL1n : VDET1n 0 V to VDET1n 0.4 V in 50 mV step, Min. 4.15 V (2) VSHT2n : 2.3 V to 2.8 V in 100 mV step VROUT: 2.9 V to 3.7 V in 0.1 V step : Specify the combination of the overcharge detection delay time (tVDET1), the shutdown 2 detection delay time (tVSHT2) and the overcharge release delay time (tVREL1) and the overcharge detection timer reset delay time (tVTR). Refer to Delay Time Code Table for details. Delay Time Code Table Code t (s) t (s) t (ms) t (ms) VDET1 VSHT2 VREL1 VTR A 2 2 16 6 B 4 2 16 6 C 6 2 16 6 D 2 4 16 6 E 4 4 16 6 F 6 4 16 6 G 2 6 16 6 H 4 6 16 6 J 6 6 16 6 K 1.5 4.5 12 4.5 : Specify the timer reset delay time option. Refer to Timer Reset Delay Time Table for details. Timer Reset Delay Time Table Code Timer Reset Delay Time A No B Yes (1) Refer to Product Code Table for details. (2) VDET1n, VREL1n, VSHT2n: n = 1, 2, 3, 4 2