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ISL6845IBZ Datasheet(PDF) 7 Page - Intersil Corporation |
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ISL6845IBZ Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 13 page 7 FN9124.11 February 23, 2012 Current Limit, Sourcing -20 -- mA Current Limit, Sinking 5 -- mA CURRENT SENSE Input Bias Current VCS = 1V -1.0 - 1.0 µA CS Offset Voltage VCS = 0V (Note 11) 95 100 105 mV COMP to PWM Comparator Offset Voltage VCS = 0V (Note 11) 0.80 1.15 1.30 V Input Signal, Maximum 0.91 0.97 1.03 V Input Signal, Maximum (ISL6843C Only) 0.9 0.97 1.07 V Gain, ACS = ΔVCOMP/ΔVCS 0 < VCS < 910mV, VFB = 0V (Note 11) 2.5 3.0 3.5 V/V CS to OUT Delay (Note 11) - 25 40 ns CS to OUT Delay (ISL6843C Only) (Note 11) 70 ns ERROR AMPLIFIER Open Loop Voltage Gain (Note 11) 60 90 - dB Open Loop Voltage Gain (ISL6843C Only) (Note 11) 55 dB Unity Gain Bandwidth (Note 11) 3.5 5- MHz Reference Voltage VFB = VCOMP 2.475 2.514 2.55 V FB Input Bias Current VFB = 0V -1.0 -0.2 1.0 µA COMP Sink Current VCOMP = 1.5V, VFB = 2.7V 1.0 -- mA COMP Source Current VCOMP = 1.5V, VFB = 2.3V -0.4 -- mA COMP VOH VFB = 2.3V 4.80 - VREF V COMP VOL VFB = 2.7V 0.4 - 1.0 V PSRR Frequency = 120Hz, VDD = 12V to 18V (Note 11) 60 80 - dB OSCILLATOR Frequency Accuracy Initial, TJ = +25°C 49 52 55 kHz Frequency Variation with VDD T = +25°C (f18V - f12V)/f12V -0.2 1.0 % Temperature Stability (Note 11) - - 5 % Amplitude, Peak-to-Peak -1.9 - V RTCT Discharge Voltage -0.7 - V Discharge Current RTCT = 2.0V 7.2 8.4 9.5 mA OUTPUT Gate VOH VDD to OUT, IOUT = -200mA - 1.0 2.0 V Gate VOL OUT to GND, IOUT = 200mA - 1.0 2.0 V Peak Output Current COUT = 1nF (Note 11) - 1.0 - A Rise Time COUT = 1nF (Note 11) - 20 40 ns Fall Time COUT = 1nF (Note 11) - 20 40 ns PWM Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” and “Typical Application” schematic on pages 3 and 4. VDD = 15V (Note 12), Rt = 10kΩ, Ct = 3.3nF, TA = -40°C to +105°C (Industrial) or TA = 0°C to +70°C (Commercial), Typical values are at TA = +25°C. Boldface limits apply over the operating temperature range, -40°C to +105°C or 0°C to +70°C . (Continued) PARAMETER TEST CONDITIONS MIN (Note 9) TYP MAX (Note 9) UNITS ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 |
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