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SSL1750 bảng dữ liệu(PDF) 23 Page - NXP Semiconductors |
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SSL1750 bảng dữ liệu(HTML) 23 Page - NXP Semiconductors |
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23 / 29 page  SSL1750_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 15 September 2008 23 of 29 NXP Semiconductors SSL1750 SMPS control IC for LED drivers Demagnetization management PFC (pin PFCAUX) Vth(comp)PFCAUX comparator threshold voltage on pin PFCAUX −150 −100 −50 mV tto(demag)PFC PFC demagnetization time-out time 40 50 60 µs Iprot(PFCAUX) protection current on pin PFCAUX VPFCAUX =50mV −75 - −5nA Driver (pin PFCDRIVER) Isrc(PFCDRIVER) source current on pin PFCDRIVER VPFCDRIVER =2V - −0.5 - A Isink(PFCDRIVER) sink current on pin PFCDRIVER VPFCDRIVER = 2 V - 0.7 - A VPFCDRIVER =10V - 1.2 - A VO(PFCDRIVER)max maximum output voltage on pin PFCDRIVER -11 12 V Overvoltage protection flyback (pin FBAUX) Iovp(FBAUX) overvoltage protection current on pin FBAUX 279 300 321 µA Ncy(ovp) number of overvoltage protection cycles 6812 Demagnetization management flyback (pin FBAUX) Vth(comp)FBAUX comparator threshold voltage on pin FBAUX 60 80 110 mV Iprot(FBAUX) protection current on pin FBAUX VFBAUX =50mV −50 - −5nA Vclamp(FBAUX) clamp voltage on pin FBAUX IFBAUX = −500 µA −1.0 −0.8 −0.6 V IFBAUX = 500 µA 0.5 0.7 0.9 V tsup(xfmr_ring) transformer ringing suppression time 1.5 2 2.5 µs Pulse width modulator flyback ton(fb)min minimum flyback on-time - tleb(fb) -ns ton(fb)max maximum flyback on-time 20 25 30 µs Oscillator flyback fsw(fb)max maximum flyback switching frequency 100 125 150 kHz Vstart(VCO)FBCTRL VCO start voltage on pin FBCTRL 1.3 1.5 1.7 V Vhys(FBCTRL) hysteresis voltage on pin FBCTRL -60 - mV ∆VVCO(FBCTRL) VCO voltage difference on pin FBCTRL - −0.1 - V Table 5. Characteristics …continued Measurement data valid at Tamb =25 °C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into the IC; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit |
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