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AN8038 Datasheet(PDF) 5 Page - Panasonic Semiconductor |
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AN8038 Datasheet(HTML) 5 Page - Panasonic Semiconductor |
5 / 22 page Voltage Regulators AN8038, AN8038S 5 Parameter Symbol Conditions Min Typ Max Unit Low-voltage protection (U.V.L.O.) ∆V CC 5.4 V start/stop supply voltage difference Transformer reset (TR) detection TR ∆V TH 0.1 V threshold hysteresis width Oscillator (CF) upper limit voltage VCLH IIFB = − 0.5 mA, CF = 1 000 pF 4.2 V Oscillator (CF) lower limit voltage 1 VCFL1 IIFB = − 0.5 mA, CF = 1 000 pF 1.0 V Oscillator (CF) lower limit voltage 2 VCFL2 IIFB = − 0.2 mA, CF = 1 000 pF 0.1 V Maximum on-period tON(max) IIFB = − 0.2 mA, CF = 1 000 pF 12 µs VTR = 0.1 V Minimum off-period 1 tOFF(min)1 IIFB = − 0.2 mA, CF = 1 000 pF 2.6 µs VTR = 0.1 V Minimum off-period 2 tOFF(min)2 IIFB = −1.3 mA, CF = 1 000 pF 67 µs ITR = −450 µA Light-load oscillator frequency fOSC2 IIFB = −1.3 mA, CF = 1 000 pF 15 kHz ITR = −450 µA Output rise time tr 10% to 90%, IOUT = 0 mA 40 ns Output fall time tf 10% to 90%, IOUT = 0 mA 20 ns TR output response time tTR 400 ns CLM output response time tCLM 100 ns Circuit current during startup 2 ISTART2 Ta = −30°C to +85°C 100 190 300 µA s Electrical Characteristics at VCC = 18 V, Ta = 25°C (continued) • Design Reference Data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Pin No. Equivalent Circuit Description I/O 1 TR: I Transformer reset detection input. When a transformer reset is detected, i.e., a low level is input to this pin, the IC output goes high. However, the transformer reset signal is ignored if the signal is shorter than the minimum off- period determined by the CF pin. Also note that the maximum on-period is corrected according to the source current. s Terminal Equivalent Circuits 1 TR VREF 7 V High-side clamp Low-side clamp |
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Similar Description - AN8038 |
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