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HT7939A Datasheet(PDF) 8 Page - Holtek Semiconductor Inc

Part # HT7939A
Description  Performance White LED Driver
PDF  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT7939A Datasheet(HTML) 8 Page - Holtek Semiconductor Inc

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Rev. 1.00
8
April 19, 2012
HT7939A
Fig.13 HT7939A-2 7S4P Dimming=10kHz, D=50%
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=VEN Signal, CH2=ILED Current)
Fig.14 HT7939A-2 7S4P Dimming=200kHz, D=50%,
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=VEN Signal, CH2=ILED Current)
Fig.15 HT7939A-2 7S4P Start Up Waveform,
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=CIN, CH2= VOUT)
Fig.16 HT7939A-2 7S4P OVP Waveform,
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1= Switching Signal, CH2= VOUT)
Fig.17 HT7939A-2 7S4P basic waveform,
VIN=5.0V, L=22mH, CIN=COUT=2.2mF



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