DS2770

DS2770 Battery Monitor and Charge Controller www.maxim-ic.com FEATURES § § § Integrated charge controller supporting both rechargeable lithium and NiMH battery technologies Available in two configurations: – Internal 25mW current-sense resistor – External user-selectable sense resistor Current measurement: – 15-bit bidirectional measurement – Internal sense resistor configuration: 62.5mA LSB and ±2A dynamic range – External sense resistor configuration: 1.56mV LSB and ±51.2mV dynamic range Current accumulation – Internal sense resistor: 0.25mAh LSB – External sense resistor: 6.25mVh LSB Voltage measurement with 4.88mV resolution Temperature measurement using integrated sensor with 0.125°C resolution 40 bytes of lockable EEPROM 16 bytes of general-purpose SRAM 42-day timer Dallas 1-Wireâ interface with 64-bit ID 1.8V logic levels Low power consumption: – Active current: 80mA typical – Sleep current: 0.5mA typical PIN ASSIGNMENT UV CC VCH SNS SNS SNS NC IS2 1 2 3 2 4 5 6 7 8 16 15 14 13 12 11 10 9 VDD VIN DQ VSS VSS VSS NC IS1 DS2770 16-Pin TSSOP § § § § § § § § § PIN DESCRIPTION UV CC VCH SNS IS2 IS1 VSS DQ VIN VDD NC – Battery Undervoltage Detect Output – Charge Control Output – Charge Supply Input – Sense Resistor Connection – Current-Sense Input – Current-Sense Input – Device Ground – Data Input/Output – Voltage Sense Input – Power Supply Input – No Connect ORDERING INFORMATION ORDERING NUMBER DS2770AE DS2770BE DS2770AE/T&R DS2770BE/T&R DS2770AE-025 DS2770BE-025 DS277...