參數(shù)資料
型號(hào): PTB48560CAS
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源模塊
英文描述: 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
封裝: DIP-11
文件頁數(shù): 13/29頁
文件大?。?/td> 800K
代理商: PTB48560CAS
www.ti.com
15
6
4
2
15
6
4
2
1
2
4
5
9
10
8
7
6
VOAdjust
VOBus
Track
+Sense
VOCOM
-Sense
+VI
-V I
PEN
PTB48560A
+VI
-V I
R1
14.3 k
W
U1
U2
3
C2
100 F
m
R2
698
W
C3
100 F
m
C5
100 F
m
C4
100 F
m
3
U3
VI
PTH05050W
VO
Track
Inhibit GND Adjust
VI
PTH05050W
VO
Track
Inhibit GND Adjust
R3
8.87 k
W
V BUS (5 V)
O
V(POL)1 (3.3 V)
V
2 (1.5 V)
(POL)
3
NEN
C1
47 F
m
PTB48560A, PTB48560B
PTB48560C
SLTS236A–MARCH 2005–REVISED OCTOBER 2005
Figure 21. Power-Up Sequencing With Nonisolated POL Modules
The output voltage of the PTB48560 must be set to a valid intermediate supply voltage. This depends on the
input voltage requirements of the downstream modules. For 5-V input modules, the PTB48560A is selected and
adjusted for an output of 5 V. For 12-V input modules, the PTB48560C is used and adjusted for an output of
12 V. U2 and U3, can be set to any voltage over their applicable adjustment range. In this example, they are set
to 3.3 V (R2 = 698 ) and 1.5 V (R3 = 8.87 k), respectively. Figure 22 shows the power-up waveforms from
Figure 21 when the Track control of all three modules are simply connected together.
The PTB48560 converter (U1) provides the required intermediate voltage from the VOBus output to power the
downstream modules, while holding the common Track control at ground potential. After allowing times for U2
and U3 to initialize, U1 removes the ground from the Track control, allowing this voltage to rise. The outputs from
the two nonisolated modules then rise simultaneously to their respective set-point voltages.
20
相關(guān)PDF資料
PDF描述
PTB48560AAZ 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB48580AAS 2-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB48580BAH 2-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB48580BAZ 2-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB48580AAZ 2-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
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