MAX5019 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX5019 Datasheet PDF : 14 Pages
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Current-Mode PWM Controllers with Integrated
Startup Circuit
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 13V, a 10µF capacitor connects VCC to GND, VCS = 0, V+ = 48V, 0.1µF capacitor connected from SS_SHDN to GND, NDRV
= open circuit, VFB = 3V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SLOPE COMPENSATION
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Slope Compensation
(MAX5019 only)
VSCOMP
26
mV/µs
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Hysteresis
CURRENT LIMIT
CS Threshold Voltage
CS Input Bias Current
VILIM
FB = GND
0 ≤ VCS ≤ 2V, FB = GND
150
°C
25
°C
419 465
510
mV
-1
1
µA
Current Limit Comparator
Propagation Delay
50mV overdrive on CS, FB = GND
180
ns
CS Blanking Time
OSCILLATOR
Clock Frequency Range
Max Duty Cycle
SOFT-START
SS Source Current
SS Sink Current
FB = GND, only PWM comparator is blanked
70
ns
FB = GND
MAX5019, FB = GND
MAX5020, FB = GND
247
275
302
kHz
75
85
%
44
50
ISSO
VSS_SHDN = 0
2.0
4.5
6.5
µA
1.0
mA
Steady State Reference Voltage
at SS_SHDN
VSS_SHDN No external load
2.331 2.420 2.500
V
Shutdown Threshold
VSS_SHDN falling
VSS_SHDN rising
0.25 0.37 0.41
V
0.53 0.59 0.65
Typical Operating Characteristics
(V+ = 48V, VDD = 13V, CS = GND, NRDV is open circuit, TA = +25°C, unless otherwise noted.)
VSS_SHDN vs. TEMPERATURE
(AT THE END OF SOFT-START)
NDRV FREQUENCY
vs. TEMPERATURE
1.003
278
81.0
MAX5019
MAXIMUM DUTY CYCLE
vs. TEMPERATURE
VFB = 4V
1.002
277
80.9
1.001
FB = GND
276
80.8
FB = GND
80.7
275
80.6
1.000
274
80.5
0.999
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
273
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
80.4
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
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