Battery_fuelgauge_smb_ redmi note 4 nickel mtk6797

[venuscell MTC]

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J601 AS BATTERY CONNECTOR REDMI NOTE 4 NICKEL MTK6797
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PIN 5,6,7,8 AS VBAT THE MAIN POWER SOURCE WILL FLOW OR WILL CHARGE IN
PIN 1,4 AS BAT ON GET IN TO U601-C T15
PIN 2,3 THROUGHT R620 AS AUX_IN2_BATID AND GO TO U301-B AUX IN ROOM , AUXIN2 PIN Y4 C418 1.0uF
PIN 9,10,11,12 AS GROUND , CONTROLLED WITH U602 CW2015CSAD AS FUELGAUGE UNIT IC WITH RESISTOR R601 AS
RESISTOR FUELGAUGE SENSOR Rfg > 0.5W 0.01R/1% CONNECTED TO PIN CS_P U16 AND CS_N U15 GAUGE ROOM U601-C MT6351

START FROM WHERE THE VBAT CURRENT FLOWS ...
BATTERY CONNECTOR J601
PIN 5,6,7,8 ... VBAT AT TP11 AS THE POWER SOURCE START TO WORK AND COME IN
- TO U601-C MT6351 CHARGER ROOM L14 PIN ISENSE
- TO U802 BQ2425X-QFN SW Charger / Power Path SMB GROUP UNIT
THROUGH C804 PIN 13 AND 14 BAT INTERNAL BQ2425X-QFN WITH 2 CONDITIONS AVAILABLE
FIRST , FULL BATTERY , WILL FLOW TO SYS 15 ,16 THROUGHT C807 AND C808 BECOME VSYS AS VOLT SYSTEM MAIN POWER
SECOND, LOW BATTERY , PIN 10 ILIM AND PIN 7 INT WILL CHECK AND TRY TO SEND ALARM EINT5 LINE GO TO GPIO AM24 EINT5 U301-D GPIO ROOM
THEN U301-C MT6797 I2S ROOM I2S1_MCK T80 GO TO U802 BQ2425X-QFN 9/CE AS CHIP ENABLE
WHEN THE VBUS C809 GET IN TO U802 BQ2425X-QFN PIN 1,24 AT THE SAME TIME WILL ACTIVATED :
- REGN 22 TO ACTIVATED PIN TS 11,12 (THEMPERATURE SENSOR) CONTROL AND PIN 2 PSEL (POWER SELECTION )TO CHANGE
POWER SOURCE FROM VBAT TO VBUS
THEN VBUS START TO WORK TO
- PIN SW 19,20 (SWITCH MODE/BUCK) ...
- PIN BTST 21 ( BOOTSTRAP ) CFLY C805 ... TO GAIN THE PULSE WITH MODULATION OF HIGH CURRENT THROUGHT
L 801 1uH AS BUCK REGULATOR INDUCTOR
THEN THE HIGH CURRENT START TO FILL THE VBAT THROUGHT SYS PIN 15,16 AND CHARGE OUT TO PIN 13,14 VBAT LINE
UNTIL FULL

U602 CW2015CSAD FUELGAUGE GROUP UNIT
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START J601 PIN 5,6,7,8, AT C662 AS VBAT GO THROUGHT R621 100Ohm , C661 100nF
AND GET IN TO U602 PIN 3 AS VDD POWER SOURCE FOR U602
THEN GO THROUGHT R22 1KOhm C660 100nF VBAT AS CELL WILL BE CHECK BY FUELGAUGE SENSOR GET IN TO U602 PIN 2

THEN FROM PIN 9,10,11,12 AS GROUND PIN
LINE CS_N BEFORE GAUGING WITH R601 Rfg > 0.5W 0.01R/1% GO TO U602
- PIN 1 AS CTG ,
- PIN 4 AS GROUND
- AND PIN 6 AS QSTART ... THEN GO TO U601-C IN GAUGE ROOM PIN U15 AS PURE CURRENT FROM VBAT
LINE CS_P AFTER GAUGING WITH R601 , GO TO U601-C IN GAUGE ROOM PIN U16 AS CURRENT GAUGE SENSORED
PIN 9 AUTO ENABLE U602 ACTIVATED
PIN 8 SDA AND 7 SCL IS I2C CONTROL FROM SOC U301 WILL GET GAUGED REPORT
PIN 5 ALERT AS WARNING SIGN OR INTERUP TO SOC U301 IF THE VBAT CURRENT LESS

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