MAX17491 데이터 시트보기 (PDF) - Maxim Integrated
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MAX17491 Datasheet PDF : 12 Pages
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Single-Phase Synchronous MOSFET Driver
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDD = 5V, CDH = 3nF, CDL = 3nF, TA = +25°C, unless otherwise noted.)
DH RISE AND FALL TIMES
vs. CAPACITIVE LOAD
40
35
30
RISE TIME
25
20
FALL TIME
15
10
5
CDL = CDH
0
1000 2500 4000 5500 7000 8500 10,000
CAPACITANCE (pF)
DH AND DL RISE AND FALL TIMES
vs. TEMPERATURE
40
DL RISE
35
30
DH RISE
25
DH FALL
20
DL FALL
15
DL IS DRIVING 2 SI7336ADP
DH IS DRIVING 1 SI7892ADP
10
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
PACKAGE-POWER DISSIPATION
vs. PWM FREQUENCY
60
B
50
A
40
30
20
10
0
0
A: CDH = 3.3nF, CDL = 3.3nF
B: CDH = 1.5nF, CDL = 6.8nF
200 400 600 800 1000 1200
PWM FREQUENCY (kHz)
PROPAGATION DELAY TIME
vs. TEMPERATURE
16
15
PWM FALL TO DH FALL
14
13
12
11
PWM RISE TO DL FALL
10
9
8
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
TYPICAL APPLICATION CIRCUIT
SWITCHING WAVEFORMS
MAX17491 toc08
VPWM
5V/div
VLX
10V/div
VDL
VDH
100ns/div
5V/div
20V/div
DH FALL AND DL RISE WAVEFORMS
MAX17491 toc09
DH RISE AND DL FALL WAVEFORMS
MAX17491 toc10
VPWM
5V/div
VPWM
5V/div
VLX
10V/div
VLX
10V/div
VDL
VDH
20ns/div
5V/div
VDL
10V/div
VDH
20ns/div
5V/div
10V/div
4 _______________________________________________________________________________________
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