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UL9024 - NON-ISOLATED HIGH EFFICIENCY BUCK CONSTANT CURRENT LED DRIVER

Datasheet Summary

Description

UL9024 is a high precision LED constant current control chip operating at critical conduction mode (CRM) with zero current switched-on and peak current switched-off.

It’s mainly targeted for 85Vac~265Vac universal mains and non-isolated buck LED power systems.

Features

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  • No VCC capacitor and start-up resistor.
  • Wide input voltage range.
  • High efficiency (up to 95%).
  • Highly accurate constant LED current.
  • Cycle-by-cycle current limitation.
  • LED short circuit protection.
  • Leading edge blanking control.
  • Under-voltage Lockout protection (UVLO).
  • Thermal adjustment.

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Datasheet preview – UL9024

Datasheet Details

Part number UL9024
Manufacturer UTC
File Size 195.60 KB
Description NON-ISOLATED HIGH EFFICIENCY BUCK CONSTANT CURRENT LED DRIVER
Datasheet download datasheet UL9024 Datasheet
Additional preview pages of the UL9024 datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD UL9024 Preliminary NON-ISOLATED HIGH EFFICIENCY BUCK CONSTANT CURRENT LED DRIVER  DESCRIPTION UL9024 is a high precision LED constant current control chip operating at critical conduction mode (CRM) with zero current switched-on and peak current switched-off. It’s mainly targeted for 85Vac~265Vac universal mains and non-isolated buck LED power systems. UL9024 integrates proprietary high voltage supply circuit, which eliminates VCC capacitor and startup resistor. The IC also combines a high power MOSFET. Very simple application circuit is achieved. UL9024 adopts critical conduction mode, which can turns on the internal power MOSFET when the inductance current reaches zero, reducing the power MOSFET switching loss, and achieving high efficiency.
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