参数资料
型号: MAX5974AEVKIT#
厂商: Maxim Integrated Products
文件页数: 5/27页
文件大小: 0K
描述: EVAL KIT MAX5974A
标准包装: 1
系列: *
MAX5974A/MAX5974B/MAX5974C/MAX5974D
Active-Clamped, Spread-Spectrum,
Current-Mode PWM Controllers
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 12V (for MAX5974A/MAX5974C, bring V IN up to 17V for startup), V CS = V CSSC = V DITHER/SYNC = V FB = V FFB = V DCLMP =
V GND , V EN = +2V, NDRV = AUXDRV = SS = COMP = unconnected, R RT = 34.8k I , R DT = 25k I , C IN = 1 F F, T A = -40 N C to +85 N C,
unless otherwise noted. Typical values are at T A = +25 N C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ERROR AMPLIFIER
FB Reference Voltage
FB Input Bias Current
V REF
I FB
V FB when I COMP = 0,
V COMP = 2.5V
V FB = 0 to 1.75V
MAX5974A/
MAX5974B
MAX5974C/
MAX5974D
MAX5974A/
MAX5974B
MAX5974C/
MAX5974D
1.5
1.202
-250
-500
1.52
1.215
1.54
1.227
+250
+100
V
nA
Voltage Gain
A EAMP
80
dB
Transconductance
Transconductance Bandwidth
Source Current
Sink Current
g M
BW
Open loop (typical gain
= 1) -3dB frequency
V FB = 1V, V COMP = 2.5V
V FB = 1.75V, V COMP = 1V
MAX5974A/
MAX5974B
MAX5974C/
MAX5974D
MAX5974A/
MAX5974B
MAX5974C/
MAX5974D
1.8
1.8
300
300
2.55
2.66
2
30
375
375
3.2
3.5
455
455
mS
MHz
F A
F A
FREQUENCY FOLDBACK (FFB)
V CSAVG -to-FFB Comparator
Gain
10
V/V
FFB Bias Current
I FFB
V FFB = 0V, V CS = 0V (not in FFB mode)
26
30
33
F A
NDRV Switching Frequency
During Foldback
f SW-FB
f SW /2
kHz
Note 2: All devices are 100% production tested at T A = +25 N C. Limits over temperature are guaranteed by design.
Note 3: See the Output Short-Circuit Protection with Hiccup Mode section.
Note 4: The parameter is measured at the trip point of latch with V FB = 0V. Gain is defined as D V COMP / D V CSSC for 0.15V <
D V CSSC < 0.25V.
Maxim Integrated
5
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