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參數(shù)資料
| 型號(hào)： | DCP012405 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Miniature 24V Input, 1W Isolated Unregulated DC/DC Converters(小型24V輸入, 1W 隔離，非穩(wěn)壓的 DC/DC變換器) |
| 中文描述： | 微型24V輸入，1W隔離穩(wěn)壓DC / DC轉(zhuǎn)換器（小型24V的輸入，1W的隔離，非穩(wěn)壓的直流/直流變換器） |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大小： | 169K |
| 代理商： | DCP012405 |
6
DCP0124
FUNCTIONAL DESCRIPTION
OVERVIEW
The DCP0124 offers up to 1W of unregulated output power
from a 24V input source with a typical efficiency of up to
76%. This is achieved through highly integrated packaging
technology and the implementation of a custom power stage
and control IC.
POWER STAGE
This uses a pull-pull, center-tapped topology switching at
400kHz (divide by 2 from 800kHz oscillator).
OSCILLATOR AND WATCHDOG
The on-board 800kHz oscillator provides the switching
frequency via a divide by 2 circuit and allows synchroniza-
tion via the SYNC
IN
pins. To synchronize any number of
DCP01 family of devices, simply tie the SYNC
IN
pins
together (see the Synchronization section). The watchdog
circuitry protects the DC/DC against a stopped oscillator and
checks the oscillator frequency which will shut down the
output stage if it drops below a certain threshold—i.e., it will
be tri-stated after approximately 10
μ
s.
FIGURE 1. Standard Interface.
THERMAL SHUTDOWN
The DCP0124 is also protected by thermal shutdown. If the
on-chip temperature reaches a predetermined value, the DC/
DC will shutdown. This effectively gives indefinite short
circuit protection for the DC/DC.
SYNCHRONIZATION
Any number of DCP01 family devices can be synchro-
nized by connecting the SYNC
IN
pins on the devices
together (see Figure 1). All the DCP01 devices will then
self-synchronize.
This same synchronization method applies to any V
IN
ver-
sion of the DCP01 family, allowing synchronization of
various V
OUT
and V
IN
DC/DCs.
The SYNC
OUT
pin gives an unrectified 400kHz signal from
the transformer. This can be used to set the timing of external
circuitry on the output side. In noise sensitive applications
any pick-up from the SYNC
OUT
pin can be minimized by
putting a guard ring round the pin (see Figure 2).
Bottom View
FIGURE 2. SYNC
OUT
Guard Ring.
DIVIDE BY 2 RESET
Isolated DC/DC converter performance normally suffers
after power reset. This is because a change in the steady state
transformer flux creates an offset after power-up. The DCP01
family does not suffer from this problem. This is achieved
through a patented
(1)
technique employed on the divide by 2
reset circuitry resulting in no change in output phase after
power interruption.
CONSTRUCTION
The DCP0124’s basic construction is the same as standard
ICs. There is no substrate within the molded package. The
DCP0124 is constructed using an IC, rectifier diodes, and a
wound magnetic toroid on a leadframe. As there is no solder
within the package, the DCP0124 does not require any
special PCB assembly processing. This results in an isolated
DC/DC with inherently high reliability.
ADDITIONAL FUNCTIONS
DISABLE/ENABLE
The DCP0124 can be disabled or enabled by driving the
SYNC
IN
pin with an open drain CMOS gate. If the SYNC
IN
pin is pulled low, the DCP0124 will disable. The disable time
depends on the output loading but the internal shutdown takes
DCP0124xxx
1
2
5
6
7
14
8
V
S
0V
0V
Out+
C
470nF
C
470nF
1 per DCP01
DCP0105xxx
1
2
5
6
7
14
8
V
S
0V
0V
Out+
C
470nF
DCP0105xxx
1
2
5
6
7
14
8
V
S
0V
0V
Out+
SYNC
IN
SYNC
IN
SYNC
IN
C
470nF
+5V
+24V
C
470nF
+24V
–Out 1
+Out 1
–Out 2
+5V
+Out 2
–Out 3
+Out 3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DCP012415D | Miniature 24V Input, 1W Isolated Unregulated DC/DC Converters(小型24V輸入, 1W 隔離，非穩(wěn)壓的 DC/DC變換器) |
| DCP0124 | Miniature 24V Input, 1W Isolated UNREGULATED DC/DC CONVERTERS |
| DCP012405P | IC-DC-DC CONVERTER |
| DCP012415DP | IC-DC-DC CONVERTER |
| DCP021205 | Miniature, 2W Isolated UNREGULATED DC/DC CONVERTERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DCP012405B | 制造商:BB 制造商全稱:BB 功能描述:Miniature, 1W Isolated UNREGULATED DC/DC CONVERTERS |
| DCP012405BP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Mini 1W Iso Unreg DC/DC Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| DCP012405BP | 制造商:Texas Instruments 功能描述:IC's |
| DCP012405BP-U | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Mini 1W Iso Unreg DC/DC Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| DCP012405BP-U/700 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Mini 1W Iso Unreg DC/DC Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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