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參數(shù)資料
| 型號： | DCP022415 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Miniature, 2W, Isolated UNREGULATED DC/DC CONVERTERS(微型，2W，隔離未穩(wěn)壓DC/DC轉(zhuǎn)換器) |
| 中文描述： | 微型，中，2W，隔離未穩(wěn)壓DC / DC轉(zhuǎn)換器（微型，中，2W，隔離未穩(wěn)壓直流/直流轉(zhuǎn)換器） |
| 文件頁數(shù)： | 8/17頁 |
| 文件大?。?/td> | 483K |
| 代理商： | DCP022415 |
www.ti.com
APPLICATION INFORMATION
OPTIMIZING PERFORMANCE
Optimum performance can only be achieved if the
device is correctly supported. The very nature of a
switching converter requires power to be instantly
available when it switches on. If the converter has
DMOS switching transistors, the fast edges will
create a high current demand on the input supply.
This transient load placed on the input is supplied by
the
external
input
decoupling
maintaining the input voltage. Therefore, the input
supply does not see this transient (this is an analogy
to high-speed digital circuits). The positioning of the
capacitor is critical and must be placed as close as
possible to the input pins and connected via a
low-impedance path.
TRANSFORMER DRIVE CIRCUIT
Transformer
drive
characteristically low value of transistor
on
resistance
(R
); thus, more power is transferred to the
transformer. The transformer drive circuit is limited
by the base current available to switch on the power
transistors
driving
the
characteristic current gain (beta), resulting in a
slower turn-on time. Consequently, more power is
dissipated within the transistor, resulting in a lower
overall efficiency, particularly at higher output load
currents.
SELF-SYNCHRONIZATION
The input synchronizations facility (SYNC
IN
) allows
for easy synchronizing of multiple devices. If two to
eight
devices
(maximum)
SYNC
IN
pins connected together, then all devices will
be synchronized.
PCB Design
SBVS011E–MARCH 2000–REVISED AUGUST 2006The
DCP01B
,
DCV01
, and DCP02 are three families
of miniature DC/DC converters providing an isolated
unregulated voltage output. All are fabricated using a
CMOS/DMOS process with the DCP01B replacing
the familiar DCP01 family that was fabricated from a
bipolar
process.
The
DCP02
extension of the DCP01B family, providing a higher
power output with a significantly improved load
regulation. The DCV01 is tested to a higher isolation
voltage.
is
essentially
an
capacitor,
thus
transistors
have
a
The optimum performance primarily depends on two
factors:
1. Connection of the input and output circuits for
minimal loss.
2. The ability of the decoupling capacitors to
maintain the input and output voltages at a
constant level.
transformer
and
the
The copper losses (resistance and inductance) can
be minimized by the use of mutual ground and power
planes (tracks) where possible. If that is not possible,
use wide tracks to reduce the losses. If several
devices are being powered from a common power
source, a star-connected system for the track must
be deployed; devices must not be connected in
series, as this will cascade the resistive losses. The
position of the decoupling capacitors is important.
They must be as close to the devices as possible in
order to reduce losses. See the
PCB Layout
section
for more details.
have
their
respective
Each device has its own onboard oscillator. This
oscillator is generated by charging a capacitor from a
constant current and producing a ramp. When this
ramp passes a threshold, an internal switch is
activated that discharges the capacitor to a second
threshold before the cycle is repeated.
When several devices are connected together, all the
internal capacitors are charged simultaneously.
When one device passes its threshold during the
charge cycle, it starts the discharge cycle. All the
other devices sense this falling voltage and, likewise,
initiate
a
discharge
cycle
discharge together. A subsequent charge cycle is
only restarted when the last device has finished its
discharge cycle.
so
that
all
devices
8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DCP022415D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Miniature. 2W Isolated Unregulated DC/DC Converters |
| DCP022415DP | 功能描述:DC/DC轉(zhuǎn)換器 Mini 2W Iso Unreg DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| DCP022415DP | 制造商:Texas Instruments 功能描述:DC/DC CONVERTER 2W 24V/+-15V 22415 |
| DCP022415DP | 制造商:Texas Instruments 功能描述:1C ISOLATED DC/DC CONVERTER 14-DIP |
| DCP022415DU | 功能描述:DC/DC轉(zhuǎn)換器 Mini 2W Iso Unreg DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
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