
19/07/2025
đ Day Class â Laptop Volt-In Section đ
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āĻāĻļ đ Volt-In Section āύāĻŋā§ā§āĨ¤
đĄ Volt-In Section āύāĻž āĻ āĻŋāĻ āĻĨāĻžāĻāϞ⧠Laptop āĻāĻžāϞ⧠āĻšā§ āύāĻž â āϤāĻžāĻ āĻāĻāĻā§āϰ āĻā§āϞāĻžāϏ⧠āĻšāĻžāϤā§-āĻāϞāĻŽā§ āĻĻā§āĻāĻžāύ⧠āĻšā§ā§āĻā§:
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āĻāĻŋāĻāĻžāĻŦā§ Multimeter āĻĻāĻŋā§ā§ Volt-In Path āĻā§āϰā§āϏ āĻāϰāϤ⧠āĻšā§
â
DC Jack â MOSFET â Charging IC (BQ series) āĻĒāϰā§āϝāύā§āϤ āĻā§āϞā§āĻā§āĻ āĻā§āĻ
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Voltage Flow Diagram āĻĻā§āĻā§ āĻāĻŋāĻāĻžāĻŦā§ āϏāĻŽāϏā§āϝāĻž āĻā§āĻāĻāϤ⧠āĻšā§
â
BQ247xx āϏāĻŋāϰāĻŋāĻā§āϰ IC-āĻā§āϞā§āϰ āĻĒā§āϰāϤāĻŋāĻāĻŋ āĻĒāĻŋāύ⧠āĻāϤ⧠āĻā§āϞā§āĻ āĻĨāĻžāĻā§, āĻāĻŋāĻāĻžāĻŦā§ āϤāĻž āĻā§āĻ āĻāϰāϤ⧠āĻšā§
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Adapter detect, ACDRV, REGN, ACOK, VIN â Practical voltage reading
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đ§ āĻāĻŋāĻā§ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ āĻĒā§ā§āύā§āĻ āĻļāĻŋāĻā§āώāĻžāϰā§āĻĨā§āĻĻā§āϰ āĻāύā§āϝ:
đ DC Jack â 19V IN
đ ī¸ 1st N-Channel MOSFET â Gate = 25V, Drain/Source = 19V
⥠BQ Series Charging IC:
Pin
Voltage
Description
VIN
19V IN
Power Input
ACDET
2.4Vâ2.7V
Adapter detect via resistor divider
REGN
6V
Fixed output (internal regulator)
ACDRV
25V
MOSFET gate drive
ACOK
3.3V (High)
Adapter detected OK
đ āĻāĻāĻā§āϰ āĻā§āϞāĻžāϏ⧠āϏāĻŦāĻžāĻ āĻļāĻŋāĻā§āĻā§ āĻāĻŋāĻāĻžāĻŦā§:
âĸ đ Power Path Analysis āĻāϰāϤ⧠āĻšā§
âĸ đ Diagram āĻĻā§āĻā§ Step-by-Step āĻā§āϰā§āϏ āĻāϰāϤ⧠āĻšā§
âĸ đ§ IC Pin āĻ
āύā§āϝāĻžā§ā§ Voltage Matching āĻāϰ⧠Fault āĻŦā§āϰ āĻāϰāϤ⧠āĻšā§
đ¸ āύāĻŋāĻā§ āĻā§āϞāĻžāϏā§āϰ āĻāĻŋāĻā§ āĻŽā§āĻšā§āϰā§āϤ āĻļā§ā§āĻžāϰ āĻāϰāĻāĻŋâĻ
đŦ āĻāĻŋāĻĄāĻŋāĻ āĻĻā§āĻā§ āϝāĻĻāĻŋ āĻāĻĒāĻāĻžāϰ⧠āĻāϏ⧠â Comment āĻāϰ⧠āĻāĻžāύāĻžāĻ!