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ACT4455 Datenblatt(PDF) 12 Page - Active-Semi, Inc

Teilenummer ACT4455
Bauteilbeschribung  36V/5A Step Down DC/DC Converter
PDF  16 Pages
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Hersteller  ACTIVE-SEMI [Active-Semi, Inc]
Direct Link  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT4455 Datenblatt(HTML) 12 Page - Active-Semi, Inc

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ACT4455
Rev 2, 21-Nov-12
Innovative Power
TM
- 12 -
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Circuit of Figure 7, RCS1 = RCS2 = 50mΩ, L = 18µH, CIN = 150µF, COUT = 680µF, TA = 25°C, unless otherwise specified.)
Vcs vs. Temperature
Start Up
VOUT = 5V
RLORD = 1.5Ω
IISET = 2A
VIN = 12V
CH1: VOUT, 2V/div
CH2: VIN, 5V/div
TIME: 1ms/div
CH1
CH2
VIN = 12V
IOUT = 1A
CH1: Ripper, 50mV/div
CH2: SW, 10V/div
TIME: 2µs/div
SW vs. Output Ripples
CH1
CH2
VIN = 12V
IOUT = 0A
Load Step Waveforms
CH1
CH2
CH1: VOUT Ripple, 200mV/div
CH2: IOUT, 2A/div
TIME: 400µs/div
VIN = 12V
IOUT1 = 0.08-2.1A
IOUT2 = 0A
Input Current at Output Short Output
1.2
1
0.8
0.6
0.4
0.2
0
Input Voltage (V)
5
10
15
20
25
30
35
40
Temperature (°C)
-25
0
25
50
75
100
125
150
0.18
0.17
0.16
0.15
0.14
0.13
VCS1
VCS2
CH1: Ripper, 50mV/div
CH2: SW, 10V/div
TIME: 2µs/div
SW vs. Output Ripples
CH1
CH2
VIN = 12V
IOUT = 4.2A



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