参数资料
型号: LTC3828EUH
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: Model HB Series Horizontal Stacking Banana Plug Patch Cord, Banana Plug Each End Operating Voltage 30VAC/60VDC Max, Current-15A Cont, Operating Temp Max +55 degrees C, Color-Red, Length-24" RoHS Compliant: Yes
中文描述: 3 A DUAL SWITCHING CONTROLLER, 590 kHz SWITCHING FREQ-MAX, PQCC32
封装: 5 X 5 MM, PLASTIC, MO-220WHHD, QFN-32
文件页数: 13/32页
文件大小: 396K
代理商: LTC3828EUH
LTC3828
3828f
13
(Refer to Functional Diagram)
OPERATIOU
TIME
(4a) Coincident Tracking
V
OUT1
V
OUT2
O
TIME
3828 F04
(4b) Ratiometric Tracking
V
OUT1
V
OUT2
O
Figure 4. Two Different Modes of Output Voltage Tracking
APPLICATIOU
Output Voltage Tracking
The LTC3828 allows the user to program how the channel
outputs ramp up and down by means of the TRCKSS pins.
Through these pins, the channel outputs can be set up to
either coincidentally or ratiometrically tracking, as shown
in Figure 4.
The TRCKSS pins act as clamps on the channels’ refer-
ence voltages. V
OUT
is referenced to the TRCKSS voltage
when the TRCKSS < 0.8V and to the internal precision
reference when TRCKSS > 0.8V.
W
U
U
INPUT VOLTAGE (V)
0
I
3.0
2.5
2.0
1.5
1.0
0.5
0
10
20
30
40
3828 F03
SINGLE PHASE
DUAL CONTROLLER
2-PHASE
DUAL CONTROLLER
V
O1
= 5V/3A
V
O2
= 3.3V/3A
Figure 3. RMS Input Current Comparison
To implement the tracking in Figure 4a, connect an extra
resistive divider to the output of the master channel and
connect its midpoint to the slave channel’s TRCKSS pin.
The ratio of this divider should be selected the same as that
of channel 2’s feedback divider (Figure 5).
In this tracking
mode, the master channel’s output must be set higher
than slave channel’s output
. To implement the ratiomet-
ric tracking in Figure 4b, no extra divider is needed; simply
connect one of TRCKSS pins to the other channel’s V
FB
pin
(Figure 5).
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