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IW1770 Datasheet(PDF) 2 Page - Dialog Semiconductor |
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IW1770 Datasheet(HTML) 2 Page - Dialog Semiconductor |
2 / 6 page iW1770 Off-Line Digital Quasi-Resonant PWM Controller with Peak Power Operation Rev. 1.1 Product Summary © 2016 Dialog Semiconductor www.dialog-semiconductor.com 2 of 6 15-July-2016 Figure 3.1 : iW1770 Typical Application Circuit (Using Depletion Mode N-FET as Active Start-up Device) (Achieving < 50mW No-load Power Consumption in 20W Adapter Designs) Figure 3.2 : iW1770 Typical Application Circuit (Alternative Circuit without Using Active Start-Up Device and without Using External Shutdown Control at Pin 3) Note: Pin 3 (SD_H) can be left unconnected if high-level-triggered external shutdown control is not needed. Pin 4 (ASU) can be left unconnected if an active start-up device is not needed. L N VOUT RTN + + + U1 iW1770 VSENSE SD_L SD_H ASU VCC GND OUTPUT CS/CDC 1 2 3 8 7 6 4 5 NTC RCDC L N VOUT RTN + + + U1 iW1770 VSENSE SD_L SD_H ASU VCC GND OUTPUT CS/CDC 1 2 3 8 7 6 4 5 NTC RCDC |
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