Datenblatt-Suchmaschine für elektronische Bauteile |
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DS2755 Datenblatt(PDF) 5 Page - Dallas Semiconductor |
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DS2755 Datenblatt(HTML) 5 Page - Dallas Semiconductor |
5 / 20 page DS2755: High-Accuracy Battery Fuel Gauge with Snapshot 5 of 20 Figure 2. FUNCTIONAL DIAGRAM 1-WIRE INTERFACE AND ROM ID VOLTAGE REFERENCE THERMAL SENSE ADC DQ VIN TIMEBASE M U X - + LOCKABLE EEPROM BLOCKS SRAM TEMPERATURE VOLTAGE CURRENT ACCUM. CURRENT STATUS / CONTROL chip ground SNS IS2 VSS IS1 VDD COMPARATORS PIO BIAS DETAILED PIN DESCRIPTION PIN NAME DESCRIPTION 1 VIN Battery voltage sense input. Voltage measurement performed on VIN input and displayed in Voltage Register. 2 VSS Device ground and current sense resistor connection. VSS attaches to battery end of sense resistor. 3 PIO General purpose programmable I/O pin or optional interrupt output. 4 VDD Input supply: +2.5V to +5.5V input range. Bypass VDD to VSS with 0.1 μF. 5 IS1 Current sense filter input 1 6 IS2 Current sense filter input 2 7 SNS Sense resistor connection. SNS attaches to pack end of current sense resistor. 8 DQ Serial interface data I/O pin. Bidirection data transmit and receive at 16kbps or 143kbps. Optional interrupt output. POWER MODES The DS2755 has two power modes: Active and Sleep. While in Active mode, the DS2755 continuously measures current, voltage and temperature. Current accumulation and monitoring for under voltage also occur continuously in Active mode. In Sleep mode, the DS2755 ceases these activities. The DS2755 enters Sleep mode when PMOD = 1 AND either of the following occur: the DQ line is low for longer than tSLEEP (minimum 2.1s) (DQ low used indicate that the pack has been disconnected or that the host system is signaling the DS2755 to enter Sleep mode.) the UVEN bit in the Status Register is set to 1 AND the voltage on VIN drops below undervoltage threshold VUV for tUVD The DS2755 returns to Active mode when the DQ line is pulled from a low-to-high state and the voltage on VIN is above VUV. The factory default for the DS2755 is UVEN = PMOD = 0. The DS2755 defaults to Active mode when power is first applied. |
Ähnliche Teilenummer - DS2755 |
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Ähnliche Beschreibung - DS2755 |
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