SY6410DFC

Application Note: SY6410 Cost-save Single Cell Li+ Battery Gauge IC General Description Features  The SY6410 is a cost-save gauge IC for single cell lithium-ion (Li+) battery in handheld and portable equipments. The SY6410 senses battery terminal voltage and adopts the proprietary algorithm to calculate the corresponding state of charge (SOC). ±7.5mV/Cell Voltage Measurement Provide Accurate State of Charge  Temperature/Load Variation Compensation  No Accumulated Errors  Eliminate Current Sense Resistor  I2C Interface  Low SOC Alert Indicator  Compact DFN2×2-8 Package Comparing with conventional voltage-based gauge which translates terminal voltage to SOC directly, the sophisticated algorithm in the SY6410 shows great advantage in SOC accuracy. The SY6410 can be classified as advanced voltage-based gauge which does not need current sensors and the SOC accuracy will not diverge with time. SOC and voltage information is accessed by the I2C interface. The SY6410 is available in DFN2×2-8. Applications   rep are SY6410 □(□□)□ on fi Typical Application Note de nti a Package type DFN2×2-8 lP Temperature Code Package Code Optional Spec Code Ordering Number SY6410DFC Smart Phones/PDAs Portable Game Players Digital Still and Video Cameras Wireless Handsets dF   Ordering Information or W OO KO O  yC R5 VDD ALRT CELL SDA 470Ω erg Cell+ Sil C1 1µF Cell- R3 .C 100Ω orp R4 VCC R1 R2 System μP SY6410 C2 CTG SCL GND NC 1µF Note: CELL pin’s resistance R5 might not be more than 470 Ω, otherwise it will impact voltage sampling. Fig.1 Typical Application Circuit AN_SY6410 Rev.0.9 © 2022 Silergy Corp. Silergy Corp. Confidential-prepared for Customer Use Only 1 All Rights Reserved. AN_SY6410 Pinout (top view) 1 8 CELL 2 7 EP GND 4 6 NC or W 3 SCL 5 Top View rep are (Pad Side Down) ALRT dF VDD SDA OO KO O CTG Pin Number CTG 1 CELL 2 VDD 3 GND 4 Connect to GND. on fi Battery voltage monitors I/O. Bypass with a 1μF capacitor to the GND. Connect to battery's positive terminal through R5. Power supply input. Bypass with a 1μF capacitor to GND. Connect to battery's positive terminal through R4. Ground. Connect to battery's negative terminal. .C —————— Description de nti a Pin Name lP Part Number Package type Top Mark① SY6410DFC DFN2×2-8 Btxyz Note① ： x=year code, y=week code, z= lot number code. Open-drain output. Low SOC alarm signal. When SOC is below the threshold, this pin will be pulled down. 5 NC 6 No connection. NC is recommended to connect to GND. SCL 7 I2C clock input. SCL has an internal pull-down resistance. 8 I2C data input/output. SDA has an internal pull-down resistance. yC orp ALRT -- Exposed pad. Connected to GND. Sil EP erg SDA AN_SY6410 Rev.0.9 © 2022 Silergy Corp. Silergy Corp. Confidential-prepared for Customer Use Only 2 All Rights Reserved. AN_SY6410 Absolute Maximum Ratings (Note 1) CELL, VDD, ALRT , SCL, SDA to GND---------------------------------------------------------------------- -0.3V to 6.0V Junction Temperature (TJ) -------------------------------------------------------------------------------------------------- 150°C Storage Temperature ---------------------------------------------------------------------------------------------- -65°C to 150°C Recommended Operating Conditions OO KO O VDD ------------------------------------------------------------------------------------------------------------------- 2.7V to 4.5V CELL ------------------------------------------------------------------------------------------------------------------- 2.7V to 4.5V SCL, SDA, ALRT --------------------------------------------------------------------------------------------------- -0.1V to 3.3V CTG, NC ----------------------------------------------------------------------------------------------------------- Connect to GND Operating Temperature Range ----------------------------------------------------------------------------------- -20°C to 60°C Electrical Characteristics Power Supply VDD Input Sleep Mode Current IIN(SLEEP) Time Base Accuracy tERR IIN Sil Data Hold Time Data Output Fall Time -2 -4 Unit 4.5 2.5 V 40 μA 2 2 4 μA 250 -7.5 -30 2.5 fSCL % ms 7.5 30 4.5 1.4 IOL=4mA(Note3) V mV V 0.5 0.4 V V V 400 kHz tBUF 1.3 μs tHD, STA 600 ns tSU, STA 600 ns tSU, STO 600 ns tSU, DAT 100 ns yC Data Set Up Time erg Set Up Time for STOP 0.5 Max orp SCL Clock Frequency Bus Free Time Between Stop/Start Start Condition(Repeated) Hold Time Repeat START Set Up Time 0.3 32 on fi SDA, ALRT Output Logic Low I2C Interface(Note3) VIH VIL VOL .C SDA, SCL Input Logic High SDA, SCL Input Logic Low de nti a VERR Voltage Measurement Range Sleep mode VDD =3.6V, TA=25°C -20°C