95018

[FAQ-Forum-Bot]

Where on the board is the shutdown pin?

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Diese Frage von Graham M. bezieht sich auf Constant current supply und wurde durch den FAQ-Bot automatisch eingestellt.

[Achim H]

Pin 3 (Adj) of the integrated circuit in TSOT23-5 housing has multiple functions.
I dont know if you can use for this the pad PWM directly.

Multi-function On/Off and brightness control pin:
• Leave floating for normal operation.(VADJ = VREF = 1.25V giving nominal average output current
o IOUTnom = 0.1/RS)
• Drive to voltage below 0.2V to turn off output current
• Drive with DC voltage (0.3V < VADJ < 2.5V) to adjust output current from 25% to 200% of IOUTnom
• Drive with PWM signal from open-collector or open-drain transistor, to adjust output current.
• Adjustment range 25% to 100% of IOUTnom for f>10kHz and 1% to 100% of IOUTnom for f < 500Hz
• Connect a capacitor from this pin to ground to increase soft-start time. (Default soft-start time =
0.5ms. Additional soft-start time is approx.0.5ms/nF)

More information you can found in the Zetex ZXLD1360 datasheet.