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No. The architecture is totally different for both type of charging IC. -
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Review the 4R7 ohms resistor on pin 20 (VDD) of the charger chip. Remove all power. Meter in resistance mode. Test across the resistor contacts. What is the measurement in ohms?Comment
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resistor on pin # 18 (DCIN) R = 20 OhmAttached Files************************************************** ***********************************
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This value should be 10 ohms. What voltage is present on pin #18 with the battery? Test also the dual diode that feeds into pin #18.Comment
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I bet this unit is charging the battery fine. Right?
If so,then there is unlikely to be a problem in charging section.
Measure volatge on EDP pins
01.On adapter only
02. On battery only.
However, first try with another compatible screen.Comment
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Which model of laptop do you actually have? What are the markings of your logic board? Do you have a link to the schematics?
What is the voltage of your battery? (it is fully charged?)Comment
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EDP pins measurement not shared. So cant suggest anything further.Comment
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Hi how much voltage do you have on backlight pins on lcd connector on battery . For the fuse and after.Comment
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Attach the power adapter. What is the voltage on the same EDP pins? What is the voltage with the adapter where you have measured 17v5?
To confirm again, the lcd flickers only if operating from battery? No LCD flicker if both the adapter & battery are plugged into the board?Comment
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Have you tested with a new screen?Comment
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The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration...11-05-2024, 03:28 PM -
My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?
Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?
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The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
I have tried multiple different Dell power adapters. My Dell... -
Hello everyone,
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Tests already made:
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- I have removed... -
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