R5438L312BA-TR Nisshinbo

R5438L Series 1 to 3 Cells Li-Ion Battery Protection IC for Secondary Protection No. EA-417-210518 OUTLINE The R5438L is an overcharge protection IC for 1 to 3 serial cells Li-ion / Li-polymer rechargeable battery. This device provides the high-accuracy voltage detection function and the shutdown function can reduce the supply current to the minimum when all cells voltage becomes less than the shutdown detection voltage. FEATURES High Voltage Tolerant Process Absolute Maximum Ratings 26 V Low Supply Current During Operation, Cell-voltage: 3.9 V, 3-Cells Typ. 0.85 A High-accuracy Voltage Detection (1) Overcharge Detector Threshold (VDET1n ) 4.10 V to 4.65 V, in 5 mV step Overcharge Detector Threshold Accuracy 0.02 V (Ta = 25C) 0.025 V (0C Ta 60C) (1) Overcharge Release Voltage (VREL1n ) VDET1n0V to VDET1n0.5V, in 50 mV step (2) Overcharge Detection Delay Time 1-, 2-, 4-, or 6-sec with Delay Time Shortening Function Overcharge Release Voltage Condition Voltage Release Type COUT Output (CMOS Output, Active-high) Typ. 4.7 V Shutdown Functions Shutdown Detector Threshold Typ. 3.5 V 0.3 V Shutdown Current Max.0.1A 1 to 3 Cells Selectable Battery Protection Compact Package DFN1814-6C 1.4mm x 1.8mm APPLICATIONS Li-Ion or Li-Polymer Battery Protection (1) VDET1n, VREL1n : n =1, 2, 3 (2) The delay time can be reduced down to approx. 1/90 by applying a 4 V 0.2 V to the VDD VC1 pins. 1 R5438L No. EA-417-210518 SELECTION GUIDE The overcharge and the delay time are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R5438Lxxx -TR DFN1814-6C 5,000 pcs Yes Yes xxx: Specify the combination of the overcharge detector threshold (VDET1n) and the overcharge release (1) voltage (VREL1n) . (2) VDET1n : 4.10 V to 4.65 V in 5 mV step (2) VREL1n : VDET1n 0 V to VDET1n 0.5 V in 50 mV step : Specify the combination of the overcharge detection delay time (tVDET1) and the overcharge release delay time (tVREL1). Refer to Delay Time Code Table for details. Delay Time Code Table Code t (s) t (ms) VDET1 VREL1 A 2 16 B 4 16 C 6 16 D 1 16 : Specify the function code. Function Code Table Code Overcharge Released Condition COUT Output CMOS H Active A Voltage Release (1) Refer to Product Code Table for details. (2) VDET1n, VREL1n: n = 1, 2, 3 2