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HT7939A Datasheet(PDF) 7 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) 7 Page - Holtek Semiconductor Inc

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Rev. 1.00
7
April 19, 2012
HT7939A
Fig.7 HT7939A-1 3S10P Dimming=10kHz, D=50% ,
VIN = 5.0V, L=22mH, VIN=COUT=2.2mF
(CH1=VEN Signal, CH2=ILED Current)
Fig.8 HT7939A-1 3S10P Dimming=200kHz, D=50%,
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=VEN Signal CH2=ILED Current)
Fig.9 HT7939A-1 3S10P Start Up Waveform
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=CIN, CH2= VOUT)
Fig.10 HT7939A-1 3S10P OVP Waveform VIN=5.0V
L=22mH, CIN=COUT=2.2mF
(CH1=Switching Signal, CH2=VOUT)
Fig.11 HT7939A-1 3S10P Basic Waveform,
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=Switching Signal, CH2=Inductor Current)
Fig.12 HT7939A-2 7S4P Dimming=100Hz, D=50%
VIN=5.0V, L=22mH, CIN=COUT=2.2mF
(CH1=VEN Signal, CH2=ILED Current)



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