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ISL1904FAZ Scheda tecnica(PDF) 10 Page - Renesas Technology Corp |
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ISL1904FAZ Scheda tecnica(HTML) 10 Page - Renesas Technology Corp |
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10 / 21 page  ISL1904 FN8286 Rev 1.00 Page 10 of 21 September 20, 2012 RAMP RAMP Sink Current Device Impedance IRAMP = 10 mA - - 20 Ω RAMP to PWM Comparator Offset TA = +25°C 181 235 287 mV Input Bias Current VRAMP = 0.3V -1.0 - 1.0 µA PULSE WIDTH MODULATOR PWM Restart Delay Range 8V < VDD< 26V 0.2 - 2.0 µs PWM Restart Cycle Delay RDELADJ = 20.0k, 8V < VDD< 26V 240 280 320 ns RDELADJ = 210k, 8V < VDD< 26V 2.00 2.20 2.40 µs Maximum Frequency Clamp 8V < VDD< 26V, RAMP = 2V, RRAMP = 100 0.8 1.0 1.2 MHz Minimum Frequency Clamp 8V < VDD< 26V, RRAMP = 23k 20 25 31 kHz Minimum On Time 8V < VDD< 26V, FB = 1V, AC = 2V, RAMP = 0V 173 - 246 ns VERR to PWM Gain 8V < VDD< 26V - 0.200 - V/V SS to PWM Gain 8V < VDD< 26V - 0.222 - V/V ERROR AMPLIFIER Input Common Mode (CM) Range (Note 8) 0 - 3.4 V GBWP (Note 8) 1.9 -- MHz VERR VOL IVERR = 6mA, 8V < VDD< 26V - - 0.950 V VERR VOH IVERR = 1mA (Ext. pull-up) SS complete 3.90 4.00 4.20 V Open Loop Gain (Note 8) 70 -- dB Offset Voltage (VOS) 8V < VDD< 26V -7.5 - 7.5 mV Input Bias Current 8V < VDD< 26V -1.0 - 1.0 µA CURRENT SENSE (CS+) Zero Current (CrCM) Detection Threshold, Falling 8V < VDD< 26V 6 - 30 mV Input Bias Current 8V < VDD< 26V -1.0 - 1.0 µA AC DETECTOR Input Bias Current 8V < VDD< 26V -50 - 50 nA Detection Threshold, Falling 8V < VDD< 26V, ACPEAK = 100mV 18 32 51 mV Detection Threshold Hysteresis 8V < VDD< 26V - 23 - mV Input Operating Range 8V < VDD< 26V 0 - 4.00 V Clamp Voltage IACDETECT = 1.0mA 6.8 7.2 7.6 V EA Reference Input Range 8V < VDD< 26V 0 - 0.538 V Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram - ISL1904” on page 2 and “Typical Application schematics” beginning on page 3. VDD = 17V, RRAMP = 54k, CRAMP = 470pF, TA = -40°C to +125°C, Typical values are at TA = +25°C; Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued) PARAMETER TEST CONDITIONS MIN (Note 7) TYP MAX (Note 7) UNITS |
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