MAX17499 Просмотр технического описания (PDF) - Maxim Integrated
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MAX17499 Datasheet PDF : 18 Pages
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Current-Mode PWM Controllers with
Programmable Switching Frequency
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +12V (for MAX17500, bring VIN up to 23.6V for startup), 10nF bypass capacitors at IN and VCC, R12 = 15kΩ (MAX17499A/
MAX17500A), R12 = 7.5kΩ (MAX17499B/MAX17500B), R15 = 1kΩ, C6 = 100nF (see the Typical Application Circuit), NDRV = open,
VUVLO/EN = +1.4V, VFB = +1.0V, COMP = open, VCS = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
GATE DRIVER
Driver Output Impedance
Driver Peak Sink Current
RON(LOW) Measured at NDRV sinking 100mA
RON(HIGH) Measured at NDRV sourcing 20mA
Driver Peak Source Current
PWM COMPARATOR
Comparator Offset Voltage
CS Input Bias Current
Comparator Propagation Delay
CURRENT-LIMIT COMPARATOR
VPWM
ICS
tPWM
VCOMP - VCS
VCS = 0V
Change in VCS = 0.1V
Current-Limit Trip Threshold
CS Input Bias Current
VCS
ICS
VCS = 0V
Propagation Delay from
Comparator Input to NDRV
tPDCS 100mV overdrive
IN CLAMP VOLTAGE
IN Clamp Voltage
ERROR AMPLIFIER
VINC 2mA sink current (Note 2)
Voltage Gain
Unity-Gain Bandwidth
Phase Margin
FB Input Offset Voltage
RLOAD = 100kΩ
RLOAD = 100kΩ, CLOAD = 200pF
RLOAD = 100kΩ, CLOAD = 200pF
COMP High Voltage
COMP Low Voltage
Source Current
ICOMP = 0A
ICOMP = 0A
Sink Current
Reference Voltage
Reference Voltage Accuracy
VREF (Note 3)
FB Input Bias Current
COMP Short-Circuit Current
DIGITAL SOFT-START
Soft-Start Duration
Reference Voltage Steps During
Soft-Start
Reference Voltage Step
tSS
fSW = 350kHz
MIN
TYP
MAX UNITS
2
4
Ω
4
10
1
A
0.65
A
1.24
1.38
1.54
V
-4
+4
μA
60
ns
900
1000 1100
mV
-4
+4
μA
60
ns
24.1
26.1
29.0
V
80
dB
2
MHz
65
Degrees
±1
mV
2.5
V
1.1
V
0.5
mA
0.5
mA
1.230
V
-1.5
+1.5
%
-50
+50
nA
8
mA
1984
5.6
31
39.67
NDRV
cycles
ms
Steps
mV
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