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參數(shù)資料
| 型號(hào)： | Si9139DG-2815 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Multi-Output, Individual On/Off Control Power-Supply Controller |
| 中文描述： | 多輸出，單獨(dú)開(kāi)/關(guān)控制電源控制器 |
| 文件頁(yè)數(shù)： | 15/17頁(yè) |
| 文件大?。?/td> | 162K |
| 代理商： | SI9139DG-2815 |
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Si9139
Vishay Siliconix
New Product
Document Number: 71841
S-22317
—
Rev. A, 16-Dec-02
www.vishay.com
15
DETAILED FUNCTIONAL BLOCK DIAGRAMS
FIGURE 7.
Complete Si9139 Block Diagram
A
SMPS
Controller
FB
A
CS
A
BST
A
DH
A
LX
A
DL
A
5-V
Linear
Regulator
3.3-V
Reference
4 V
2.4 V
B
SMPS
Controller
FB
B
CS
B
BST
B
DH
B
LX
B
DL
B
Auxiliary
1.2- to 20-V
Adjustable
Buck-Boost
Controller
C
FB
C
CSP
CSN
BST
C
DH
C
LX
C
DL
C
V
IN
V
L
RESET
ON
B
Reset
Handler
ON
A
Enable
Good A
Enable
Good B
Enable
DESCRIPTION OF OPERATION
Shutdown Mode
The logic threshold for the ON
A
and ON
B
pins is 1.6 V. Input
voltage must be 0.8 V or less for logic low and 2.4 V or higher
for logic high.
Start-up Sequence
Start-up is controlled by individual ON/OFF control. The A
output is controlled by ON
A
whilst the B and the C adjustable
outputs are both controlled by ON
B
.
When both the A and B SMPS outputs are within tolerance and
32,000 clock cycles (typically equal to 107 ms) have elapsed
since the second SMPS output went into regulation, the
RESET pin will go high, signifying that all converters are
operating correctly (see RESET Power Good Voltage
Monitor).
The Si9139 converts a 4.5-V to 30-V input voltage to five
different output voltages; two buck (step-down) high current,
PWM, switch-mode supplies of 1.5-V to 3.3-V, one
“
Buck-Boost
”
PWM switch-mode supply adjustable from
1.24 V to 20 V, one precision 3.3-V reference and one 5-V low
drop out (LDO) linear regulator output. Switch-mode supply
output current capabilities depend on external components
(can be selected to exceed 10 A). In the standard application
circuit illustrated in Figure 1, each buck converter is capable of
delivering 5 A, with the buck-boost converter delivering
500 mA.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9139DG-2815-T1 | 制造商:Vishay Siliconix 功能描述:CURRENT MODE PWM CNTRLR 2.8V/1.5V/1.24V TO 20V 1A 28SSOP - Tape and Reel |
| SI9139DG-2818 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Multi-Output, Individual On/Off Control Power-Supply Controller |
| SI9139DG-2818-T1 | 制造商:Vishay Siliconix 功能描述:CURRENT MODE PWM CNTRLR 2.8V/1.8V/1.24V TO 20V 1A 28SSOP - Tape and Reel |
| SI9139DG-2820 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Multi-Output, Individual On/Off Control Power-Supply Controller |
| SI9139DG-2820-T1 | 制造商:Vishay Siliconix 功能描述:CURRENT MODE PWM CNTRLR 2.8V/2V/1.24V TO 20V 1A 28SSOP - Tape and Reel |
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