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參數(shù)資料
| 型號： | DPA423P |
| 廠商： | POWER INTEGRATIONS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.75 A SWITCHING REGULATOR, 425 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, MS-001AB, DIP-8 |
| 文件頁數(shù)： | 9/36頁 |
| 文件大?。?/td> | 705K |
| 代理商： | DPA423P |
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Rev. S 12/07
17
DPA422-426
www.powerint.com
Forward power tables: Tables 1 (upper half), 3 and 4
Output power gures are based on forward topology using
Schottky diode rectication. Up to 5% higher output power is
possible using synchronous rectication.
Dissipation data assumes a diode loss representing 6% of the
total output power and combined loss in magnetic compo-
nents representing 6% of the total output power.
DPA-Switch losses are based on a ratio between conduction
and switching losses of approximately 3:1. These assump-
tions are typical for a single 5 V output forward converter
design using Schottky rectication and adequately designed
magnetic components.
Flyback power tables: Tables 1 (lower half), 5 and 6
Output power and dissipation gures are based on a 5 V
output using Schottky diode rectication with an efciency of
85%. Values are generated by calculation based on
I2 × R
DS(ON) losses and characterization of switching losses,
correlated to bench measurement of each DPA-Switch device.
Device dissipations above 1.5 W are possible using the
R package. However the forward converter topology is
recommended for such higher power designs.
The power tables provide two types of information. The rst is
the expected device dissipation for a given output power. The
second is the maximum power output. Each table species the
input voltage range and assumes a single 5 V output using
Schottky diode rectication.
For example, referring to Table 1, for 36 VDC to 75 VDC input
range, DPA424 would typically dissipate 1 W in a 23 W forward
converter and has a maximum power capacity of 35 W. In the
same converter, DPA425 would dissipate 0.5 W. Selecting
DPA425 with associated reduced dissipation would increase
overall converter efciency by approximately 2%.
Issues Affecting Dissipation:
Using synchronous rectication will tend to reduce device
dissipation.
Designs with lower output voltages and higher currents will
tend to increase the device dissipation listed in the power
table.
Reduced input voltage decreases the available output power
for the same device dissipation. Tables 3 to 6 are the power
tables for 16 VDC and 24 VDC input voltages. Input voltages
below 16 V are possible, but since the internal start-up
current source is not specied at voltages below 16 V, an
external chip supply current should be fed into the
CONTROL pin approximately equal to but less than I
CD1.
DPA-Switch Selection
Use Tables 1 and 3 through 6 to select the DPA-Switch based
on device dissipation. Selecting the optimum DPA-Switch
depends upon required maximum output power, efciency,
heat sinking constraints and cost goals. With the option to
externally reduce current limit, a larger DPA-Switch may be
used for lower power applications where higher efciency is
needed or minimal heat sinking is available. Generally, selecting
the next larger device, than is required for power delivery will
give the highest efciency. Selecting even larger devices may
1.
2.
3.
Output Power Table
16-32 VDC Range (Forward)2
Total Device
Dissipation
Product3
0.5 W
1 W
2.5 W
4 W
6 W
Max
Power
Output1
DPA422
3.5 W
4.5 W
-
5.0 W
DPA423
5 W
7 W
-
7.5 W
DPA424
7 W
10 W
15 W
-
15.5 W
DPA425
10 W
14 W
22 W
27 W
-
31 W
DPA426
12 W
16.5 W
25 W
31 W
37 W
43 W
Table 3.
Output Power Table for 16-32 VDC Input Voltage.
Notes:
1. Limited by device internal current limit.
2. See text in this section for a complete description of assumptions.
3. See Part Ordering Information.
Output Power Table
16-32 VDC Input Range (Flyback)2
Total Device
Dissipation
Product3
0.5 W
0.75 W
1 W
1.5 W
Max
Power
Output1
DPA422
3 W
-
4.5 W
DPA423
5 W
-
6 W
DPA424
6.5 W
8.5 W
10 W
-
11 W
DPA425
7 W
10 W
12 W
15 W
22 W
Output Power Table
24-48 VDC Range (Forward)2
Total Device
Dissipation
Product3
0.5 W
1 W
2.5 W
4 W
6 W
Max
Power
Output1
DPA422
5.5 W
7 W
-
8 W
DPA423
8 W
11 W
-
11.5 W
DPA424
11 W
16 W
23.5 W
-
25 W
DPA425
16 W
22 W
35 W
43 W
-
47 W
DPA426
18 W
25 W
39 W
48 W
58 W
65 W
Table 4.
Output Power Table for 24-48 VDC Input Voltage
(See Table 3 for Notes).
Table 5.
Flyback Output Power Table for 16-32 VDC Input Voltage
(See Table 3 for Notes).
Output Power Table
24-48 VDC Input Range (Flyback)2
Total Device
Dissipation
Product3,4
0.5 W
0.75 W
1 W
1.5 W
Max
Power
Output1
DPA422
3 W
-
7 W
DPA423
7 W
-
8.5 W
DPA424
8.5 W
11.5 W
14 W
-
17 W
Table 6.
Flyback Output Power Table for 24-48 VDC Input Voltage.
Notes:
1. Maximum output power is limited by device internal current limit.
2. See text in this section for a complete description of assumptions.
3. See Part Ordering Information.
4. Higher switching losses may prevent DPA425 from delivering more power than a
smaller device.
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| DPA423PN | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 13W 36-75V DCIN RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| DPA423P-TL | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:Highly Integrated DC-DC Converter ICs for Distributed Power Architectures |
| DPA423R | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 18W 36-75V DCIN RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| DPA423R-TL | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 18W 36-75V DCIN RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| DPA423SN | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 18W 36-75V DCIN RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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