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參數(shù)資料
| 型號(hào)： | NCP1523 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 6-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans |
| 中文描述： | 6甲，2.2 V至5.5 V輸入，非隔離，寬輸出，可調(diào)電源模塊的TurboTrans |
| 文件頁數(shù)： | 27/35頁 |
| 文件大小： | 1128K |
| 代理商： | NCP1523 |
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Notes on Use of Auto-Track
1. The
Track
pin voltage must be allowed to rise above the module set-point voltage before the module
regulates at its adjusted set-point voltage.
2. The Auto-Track function tracks almost any voltage ramp during power up, and is compatible with ramp
speeds of up to 1 V/ms.
3. The absolute maximum voltage that may be applied to the
Track
pin is the input voltage V
I
.
4. The module cannot follow a voltage at its track control input until it has completed its soft-start initialization.
This takes about 20 ms from the time that a valid voltage has been applied to its input. During this period, it
is recommended that the
Track
pin be held at ground potential.
5. The Auto-Track function is disabled by connecting the
Track
pin to the input voltage (V
). When Auto-Track
is disabled, the output voltage rises at a quicker and more linear rate after input power has been applied.
U2
PTH04T230W
Vi
Auto Track
GND
VoAdj
Vo
TurboTrans
+Sense
Sense
Inhibit/
UVLO
U3
TPS3808G50
6
GND
2
4
3
MR
CT
SENSE
5
1
U1
PTH05T210W
Vi
Auto Track
GND
VoAdj
Vo
TurboTrans
+Sense
Sense
+
Inhibit/
UVLO
SmartSync
+
R
TT
V
O1
= 3.3 V
C
O1
V
O2
= 1.8 V
C
O2
R
TT
R
4.75 k
R
SET1
1.62 k
C
I2
C
I1
RESET
V
I
= 5 V
C
0.1
μ
F
C
3
4700
μ
F
UDG06042
PTH04T230W, PTH04T231W
SLTS271A–SEPTEMBER 2006–REVISED OCTOBER 2006
Figure 24. Sequenced Power Up and Power Down Using Auto-Track
27
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