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MAX5941A Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX5941A Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 24 page IEEE 802.3af-Compliant Power-Over-Ethernet Interface/PWM Controller for Power Devices _______________________________________________________________________________________ 3 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS UVLO External Reference Voltage Hysteresis HYST Ratio to VREF,UVLO 19.2 20 20.9 % UVLO Bias Current IUVLO UVLO = 2.460V -1.5 +1.5 µA UVLO Input Ground Sense Threshold VTH,G,UVLO (Note 8) 50 440 mV UVLO Input Ground Sense Glitch Rejection UVLO = VEE 7µs Power Turn-Off Voltage, Undervoltage Lockout Deglitch Time tOFF_DLY VIN, VUVLO falling (Note 9) 0.32 ms TA = +25°C (Note 11) 0.6 1.1 Isolation Switch N-Channel MOSFET On-Resistance RON Output current = 300mA, VGATE = 5.6V, measured between OUT and VEE TA = +85°C 0.8 1.5 Ω Isolation Switch N-Channel MOSFET Off-Threshold Voltage VGSTH OUT = GND, VGATE - VEE, output current < 1µA 0.5 V GATE Pulldown Switch Resistance RG Power-off mode, VIN = 12V, UVLO = VEE 38 80 Ω GATE Charging Current IG VGATE = 2V 5 10 15 µA GATE High Voltage VGATE IGATE = 1µA 5.58 5.76 5.93 V VOUT - VEE, |VOUT - VEE| decreasing, VGATE = 5.75V 1.15 1.23 1.31 V PGOOD, PGOOD Assertion VOUT Threshold VOUTEN Hysteresis 70 mV (GATE - VEE) increasing, OUT = VEE 4.62 4.76 4.91 V PGOOD, PGOOD Assertion VGATE Threshold VGSEN Hysteresis 80 mV PGOOD Output Low Voltage ISINK = 2mA (Note 10) 0.4 V PGOOD Output Low Voltage VOLDCDC ISINK = 2mA, OUT ≤ (GND - 5V) (Note 10) 0.2 V PGOOD Leakage Current GATE = high, GND - VOUT = 67V (Note 10) 1 µA PGOOD Leakage Current GATE = VEE, PGOOD - VEE = 67V (Note 10) 1 µA ELECTRICAL CHARACTERISTICS (continued) (VIN = (GND - VEE) = 48V, GATE = PGOOD = PGOOD = OPEN, V- tied to OUT, V+ tied to GND, UVLO = VEE, TA = TMIN to +TMAX, unless otherwise noted. Typical values are at TA = +25 °C. All voltages are referenced to VEE, unless otherwise noted.) (Note 1) ELECTRICAL CHARACTERISTICS (PWM Controller) (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 SUPPLY CURRENT IV+(NS) VDD = 0V, V+ = 67V, driver not switching 0.85 1.3 V+ Supply Current IV+(S) V+ = 67V, VDD = 0V, VOPTO = 4V, driver switching 1.4 2.6 mA V+ Supply Current After Startup V+ = 67V, VDD = 13V, VOPTO = 4V 11 µA IVDD(NS) VDD = 36V, driver not switching 0.9 1.3 VDD Supply Current IVDD(S) VDD = 36V, driver switching, VOPTO = 4V 1.9 2.7 mA |
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