| Electronics > Repair |
| Help identify 6 pin chip in screwdriver charger (Steinhaus PRO-CH144-2) |
| (1/1) |
| pandrew:
This charger only provides 2 contact pins to the battery, so it's not very sophisticated, this is what the bottom of the PCB looks like: (please see attached image) I had to replace a number of components, but I'm stuck, because the little 6-pin IC1 appears to also be dead, and I don't know what it is. The SMD markings say: "Z10J2" and "573", with the Z appearing to be styled differently, it may be a logo. Has anyone seen this component before and know what it is? My googling is failing me. Note that pinout looks like this: Pin 1: GND Pin 2: feedback through optocoupler Pin 3: resistor to ground Pin 4: source of the SMF5N60 mosfet, which is connected to ground by R7..R10 low value resistors. Pin 5: VCC (electrolytic capacitor is connected between Pin 5 and Pin 1, and Pin 5 is fed by R12 and R13(probably on startup, and then I think By D3 and R14) There's nothing to limit voltage on Pin 5 as far as I can tell, so I think the IC must have a zener diode in it. Pin 6: goes to drive the gate of the mosfet through D2 and R11 i've attached a picture of the IC markings too. Note that I had to replace these components: R7, R8, R9, R10, R5, and on the opposite side the 3.15A/250V fuse, and two of the bridge rectifier diodes died. Any help would be greatly appretiated. |
| fzabkar:
OB2262 has a matching pinout, but the FB voltage may be different: http://file.remont-aud.net/baza/ic_power/sm_data/OB2262_data.pdf This resource produces about 20 hits when I input your pin definitions: https://remont-aud.net/ic_power/ |
| fzabkar:
The photo in this thread ... https://www.elforum.info/topic/134240-alimentator-steinhaus-pro-ch144-2/ ... has a different flyback controller, marking "63 635". That's an OB2263MP. https://xonstorage.blob.core.windows.net/pdf/onbright_ob2263mp_apr22_xonlink.pdf (datasheet) https://ae-pic-a1.aliexpress-media.com/kf/Sd6ac294ce33c4f1ab0cf14eb52073985S/-10pcs-100-New-OB2263MP-OB2263-2263-63-SOT23-6-Chipset.jpg (photo) |
| pandrew:
Thank you so much, I have ordered some, and I'll try replacing it... |
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