Rainbow-electronics MAX5095A Manual de usuario Pagina 5
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MAX5094A/B/C/D/MAX5095A/B/C
High-Performance, Single-Ended, Current-Mode
PWM Controllers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +15V, R
T
= 10kΩ, C
T
= 3.3nF, REF = open, C
REF
= 0.1µF, COMP = open, V
FB
= 2V, CS = GND, T
A
= T
J
= -40°C to +125°C,
unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
CURRENT-SENSE AMPLIFIER
MAX5094A/MAX5094B
2.85
3
3.26
V/V
Gain (Notes 3, 4) A
CS
MAX5094C/D, MAX5095_
2.85
3
3.40
V/V
MAX5094A/B (Note 3)
0.95
1
1.05
MAX5094C/MAX5094D (Note 3)
0.275 0.300 0.325
Maximum Current-Sense Signal V
CS_MAX
V
COMP
= 5V, MAX5095_
0.275 0.300 0.325
V
Power-Supply Rejection Ratio PSRR 12V ≤ V
CC
≤ 25V 70 dB
Input Bias Current I
CS
V
COMP
= 0V -1
-2.5
µA
Delay From CS to OUT
t
CS_DELAY
50mV overdrive 60 ns
MOSFET DRIVER
OUT Low-Side On-Resistance
V
RDS_ONL
I
SINK
= 200mA 4.5 12 Ω
OUT High-Side On-Resistance
V
RDS_ONH
I
SOURCE
= 100mA 3.5 9 Ω
I
SOURCE
(Peak) I
SOURCE
C
OUT
= 10nF 2 A
I
SINK
(Peak) I
SINK
C
OUT
= 10nF 1 A
Rise Time t
R
C
OUT
= 1nF 15 ns
Fall Time t
F
C
OUT
= 1nF 22 ns
UNDERVOLTAGE LOCKOUT/STARTUP
Startup Voltage Threshold
V
CC_START
7.98
8.4
8.82
V
Minimum Operating Voltage After
Turn-On
V
CC_MIN
7.1 7.6 8.0 V
Undervoltage-Lockout Hysteresis
UVLO
HYST
0.8 V
PWM
MAX5094A/MAX5094C/MAX5095A
94.5
96
97.5
Maximum Duty Cycle D
MAX MAX5094B/MAX5094D/MAX5095B/
MAX5095C
48
49.8
50
%
Minimum Duty Cycle D
MIN
0%
SUPPLY CURRENT
Startup Supply Current I
START
V
CC
= 7.5V 32 65 µA
Operating Supply Current I
CC
V
FB
= V
CS
= 0 3 5 mA
Zener Bias Voltage at V
CC
V
Z
I
CC
= 25mA 24
26.5
V
SYNCHRONIZATION (MAX5095A/MAX5095B only, Note 5)
SYNC Frequency Range f
SYNC
20
1000
kHz
SYNC Clock Input High
Threshold
V
SYNCINH
3.5 V
SYNC Clock Input-Low Threshold
V
SYNCINL
0.8 V
SYNC Clock Input Minimum
Pulse Width
t
PW_SYNCIN
200
ns
SYNC Clock Output High Level V
SYNCOH
1mA external pulldown 4.0 4.7 V
SYNC Clock Output Low Level V
SYNCOL
R
SYNC
= 5kΩ 0 0.1 V
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