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MAX5941BCSE Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX5941BCSE Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 24 page IEEE 802.3af-Compliant Power-Over-Ethernet Interface/PWM Controller for Power Devices 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (PWM Controller) (continued) (All voltages referenced to V-. VDD = 13V, a 10µF capacitor connects VCC to V-, VCS = V-, V+ = 48V, 0.1µF capacitor connected to SS_SHDN, NDRV = open circuit, OPTO = V-, TA = TMIN to +TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ Shutdown Current VSS_SHDN = 0V, V+ = 67V 190 290 µA VDD Shutdown Current VSS_SHDN = 0V 8 20 µA PREREGULATORS/STARTUP V+ Input Voltage 18 67 V VDD Supply Voltage 13 36 V INTERNAL REGULATORS Powered from V+, ICC = 7.5mA, VDD = 0V 7.5 9.8 12 VCC Output Voltage Powered from VDD, ICC = 7.5mA 9.0 10.0 11.0 V VCC Undervoltage Lockout VCC_UVLO VCC falling 6.6 V OUTPUT DRIVER Peak Source Current VCC = 11V (externally forced) 570 mA Peak Sink Current VCC = 11V (externally forced) 1000 mA NDRV High-Side Driver Resistance ROH VCC = 11V, externally forced, NDRV sourcing 50mA 412 Ω NDRV Low-Side Driver Resistance ROL VCC = 11V, externally forced, NDRV sinking 50mA 1.6 4 Ω PWM COMPARATOR OPTO Input Bias Current VOPTO = VSS_SHDN -1.00 +1.00 µA OPTO Control Range 23 V Slope Compensation VSCOMP MAX5941A 26 mV/µs THERMAL SHUTDOWN Thermal Shutdown Temperature 150 °C Thermal Hysteresis 25 °C CURRENT LIMIT CS Threshold Voltage VILIM VOPTO = 4V 419 465 510 mV CS Input Bias Current 0V ≤ VCS ≤ 2V, VOPTO = 4V -1 +1 µA Current-Limit Comparator Propagation Delay 25mV overdrive on CS, VOPTO = 4V 180 ns CS Blanking Time VOPTO = 4V 70 ns OSCILLATOR Clock Frequency Range VOPTO = 4V 235 275 314 kHz MAX5941A, VOPTO = 4V 75 85 Max Duty Cycle MAX5941B, VOPTO = 4V 44 50 % SOFT-START SS Source Current ISSO VSS(SHDN) = 0V 2.0 4.6 6.5 µA SS Sink Current 1mA Peak Soft-Start Voltage Clamp No external load 2.331 2.420 2.500 V VSS_SHDN falling (Note 11) 0.25 0.37 0.41 Shutdown Threshold VSS_SHDN rising (Note 11) 0.53 0.59 0.65 V |
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