JW1221A
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Power factor :
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Package :
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MOSFET RDS_ON :
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MOSFET Vds :
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OVP built-in :
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OVP built-out :
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Over temperature protection built-in :
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Over temperature protection built-out :
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Applied power 175VAC-264VAC :
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Applied power 90VAC-264VAC :
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Product details
产品描述
JW®1221A is used with an external NMOSFET to eliminate the 100/120 Hz current ripple generated by the front-end LED driver; its adaptive current adjustment can ensure that the IC de-ripples and the power consumption is minimized.
The patented control algorithm ensures good dimming and electronic load compatibility.
JW1221A allows users to flexibly adjust the LED peak current by adjusting the sampling resistor, thereby avoiding the damage to the MOSFET and LED lamp beads during short circuit or hot swap; JW1221A also allows users to set the LED negative through the resistance between the MOSFET drain and VLMT The maximum value of the terminal voltage is used to limit the power consumption of the chip.
JW1221A has the functions of open circuit protection, short circuit protection and over temperature protection. Open circuit protection can ensure a faster response speed when the machine is switched on and off continuously. When the negative terminal voltage of the LED exceeds the short-circuit detection threshold and remains above 160us, the short-circuit protection is triggered and the MOSFET is turned off. After 800ms, it will automatically exit this state. When the chip temperature is higher than 145°C, the chip enters the over-temperature protection state, the LED current ripple elimination function is turned off, and the MOSFET is fully turned on until the temperature is lower than 120°C.
main feature
• Adaptive 100/120Hz current ripple
• Compatible with dimming and electronic load
• Built-in clamp regulator tube at the input
• VG output voltage is higher than 10V
• Adjustable LED current ripple amplitude
• The maximum voltage of the negative terminal of the LED can be set
• Maximum LED current can be set
• Short circuit protection, open circuit protection
• Over temperature protection
• SOT23-6 package
• Compatible with dimming and electronic load
• Built-in clamp regulator tube at the input
• VG output voltage is higher than 10V
• Adjustable LED current ripple amplitude
• The maximum voltage of the negative terminal of the LED can be set
• Maximum LED current can be set
• Short circuit protection, open circuit protection
• Over temperature protection
• SOT23-6 package
typical application
• LED lighting
Keyword:
JW1221A
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