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NCL30105 - Constant Off Time PWM Current-Mode Controller

Datasheet Summary

Description

Pin Number Pin Name Function 1 toff Adjusts the Off Time Duration 2 DIM Dimming Input 3 VCC Supplies the Controller 4 CS Current Sense Input 5 DRV Driver Output 6 GND 7 SSTART Soft start / Peak Current Adjustment 8 NC Non connected Pin Pin Desc

Features

  • robust protection features to detect switch overcurrent faults and to detect maximum on time events. Features.
  • Constant Off Time Current.
  • Mode Control Operation.
  • Adjustable Off Time (0.5 ms to 10 ms).
  • Internal Leading Edge Blanking.
  • Source 250 mA / Sink 500 mA Peak Drive Capability.
  • ±3.2% Current Sense Accuracy at 25°C.
  • Internal Startup Delay.
  • 3.3 V Logic Level Dimming Input.
  • This is a Pb.
  • Free Device Safety Fe.

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Datasheet preview – NCL30105

Datasheet Details

Part number NCL30105
Manufacturer ON Semiconductor
File Size 0.98 MB
Description Constant Off Time PWM Current-Mode Controller
Datasheet download datasheet NCL30105 Datasheet
Additional preview pages of the NCL30105 datasheet.

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Full PDF Text Transcription

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NCL30105 Constant Off Time PWM Current-Mode Controller for LED Applications The NCL30105 is a peak current controlled fixed off time controller designed for LED driver applications in which the LEDs are operated in deep Continuous Conduction Mode (CCM) without requiring slope compensation. Featuring an adjustable off time generator, the controller can drive a MOSFET up to a 500 kHz switching frequency. A dedicated dimming pin enables the use of a pulse−width modulated logic signal to dim the LEDs directly. The soft−start pin creates a startup sequence that slowly ramps up the peak current and enables the adjustment of the peak current setpoint for analog dimming control.
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