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AP3783 Datasheet(PDF) 5 Page - Diodes Incorporated |
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AP3783 Datasheet(HTML) 5 Page - Diodes Incorporated |
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5 / 17 page  AP3783 Document number: DS37429 Rev. 6 - 2 5 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Electrical Characteristics (Cont.) (@VCC = 15V, TA = +25°C, unless otherwise specified.) Symbol Parameters Conditions Min Typ Max Unit OPERATING FREQUENCY SECTION fS(MAX) The Maximum Operating Frequency IO(MAX) (Note 5) – – 60 kHz tOFF(MAX) Maximum Off Time 691 768 845 μs tSAMPLE_H Sample Time 57% to 100% IO(MAX) 5.2 5.8 6.4 μs tSAMPLE_M 34% to 57% IO(MAX) (Note 6) 4.3 4.8 5.3 μs tSAMPLE_L 5.5% to 34% IO(MAX) (Note 6) 2.7 3 3.3 μs tSAMPLE_D 0% to 5.5% IO(MAX) (Note 6) 1.5 1.7 1.9 μs FREQUENCY JITTER SECTION ΔV CS/VCS VCS Modulation 5.5% load to 100% IO(MAX) 4.5 5 5.5 % fMOD VCS Modulation Frequency 5.5% load to 100% IO(MAX) 3.6 4 4.4 kHz CURRENT SENSE SECTION VCS_H Peak Current Sense Threshold Voltage 57% to 100% IO(MAX) 828 900 972 mV VCS_M As Above 34% to 57% IO(MAX)(Note 6) 690 750 810 mV VCS_L As Above 5.5% to 34% IO(MAX) (Note 6) 414 450 486 mV VCS_D As Above 0% to 5.5% IO(MAX) (Note 6) 230 250 270 mV RLINE Built-in Line Compensation Resistor (Note 7) 245 260 275 Ω tLEB Leading Edge Blanking VCS (Note 6) 495 550 605 ns CONSTANT VOLTAGE SECTION VFB Feedback Voltage Closed loop test of VOUT 3.95 4.01 4.07 V RFB FB Pin Input Resistance VFB=4V 560 700 840 kΩ VCABLE /VOUT% Cable Compensation Ratio AP3783A 6 7 8 % AP3783B 3 4 5 % AP3783C 9 10 11 % CONSTANT CURRENT SECTION tONS/tSW Secondary Winding Conduction Duty VFB = 3.5V 0.47 0.5 0.53 – VALLEY-ON SECTION tVAL-ON Valid Off Time of Valley-on From the end of tONS 14.4 16 17.6 μs DYNAMIC SECTION VUV_H Under Voltage of FB Pin for VCS_H – 3.61 3.68 3.75 V PROTECTION FUNCTION SECTION VFB(OVP) Over Voltage Protection at FB Pin – 7.1 7.5 7.9 V VCC(OVP) Over Voltage Protection at VCC Pin – 28 30 32 V tONP(MAX) Maximum Turn-on Time – 13.5 16 18.5 μs VFB(SCP) Short Circuit Protection VFB @ Hiccup 2.45 2.6 2.75 V tSCP Maximum Time under VFB(SCP) – 115 128 141 ms TOTP Shutdown Temperature – +144 +160 +176 °C THYS Temperature Hysteresis – +36 +40 +44 °C Notes: 5. The output constant-current design value, generally set to 110% to 120% of full load. 6. Guaranteed by Design. 7. Line compensation voltage on CS reference: AUX LINE 1 FB LINE REF _ CS V R R R 438 . 0 V Δ |
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