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DPA423R

更新时间： 2024-11-01 12:44:55
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帕沃英蒂格盛 - POWERINT 转换器电信以太网
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34页 2832K
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Highly Integrated DC-DC Converter ICs for Power over Ethernet & Telecom Applications

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DPA423R 数据手册

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DPA422-426  
DPA-Switch™ Family  
Highly Integrated DC-DC Converter ICs for  
Power over Ethernet & Telecom Applications  
Product Highlights  
V
O
Highly Integrated Solution  
•ꢀ Eliminates up to 50 external components–saves space, cost  
•ꢀ Integrates 220 V high frequency MOSFET, PWM control  
•ꢀ Lower cost plastic DIP surface mount (G package) and  
through-hole (P package) options for designs ≤35 W  
•ꢀ Thermally efficient TO-263-7C (R package) option for high  
power applications  
SENSE  
CIRCUIT  
DPA-Switch  
V
IN  
D
S
L
CONTROL  
RESET/  
C
CLAMP  
CIRCUIT  
Superior Performance and Flexibility  
X
F
•ꢀ Eliminates all external current sensing circuitry  
•ꢀ Built-in auto-restart for output overload/open loop protection  
•ꢀ Pin selectable 300/400 kHz fixed frequency  
•ꢀ Wide input (line) voltage range: 16-75 VDC  
•ꢀ Externally programmable current limit  
PI-2770-032002  
Figure 1. Typical Forward Converter Application.  
•ꢀ Source connected tab reduces EMI  
•ꢀ Line undervoltage (UV) detection: meets ETSI standards  
•ꢀ Line overvoltage (OV) shutdown protection  
•ꢀ UV/OV limits gate drive voltage for synchronous rectification  
•ꢀ Fully integrated soft-start for minimum stress/overshoot  
•ꢀ Supports forward or flyback topology  
•ꢀ Cycle skipping: regulation to zero load without pre-load  
•ꢀ Hysteretic thermal shutdown for automatic fault recovery  
•ꢀ RoHS compliant P and G package options  
Output Power Table  
36-75 VDC Input Range (Forward)2  
Total Device  
Dissipation3  
Product4  
Max  
0.5 W  
1 W  
2.5 W  
4 W  
6 W  
Power  
Output1  
DPA4227,8  
DPA423  
DPA424  
DPA425  
DPA4265  
7.5 W  
12 W  
16 W  
23 W  
25 W  
10 W  
16 W  
23 W  
32 W  
35 W  
-
-
-
-
10 W  
18 W  
35 W  
70 W  
100 W  
-
-
EcoSmart™– Energy Efficient  
•ꢀ Extremely low consumption at no-load  
•ꢀ Cycle skipping at light load for high standby efficiency  
35 W  
50 W  
55 W  
-
-
-
62 W  
70 W  
83 W  
36-75 VDC Input Range (Flyback)2  
Applications  
•ꢀ PoE applications, VoIP phones, WLAN, security cameras  
•ꢀ Telco central office equipment: xDSL, ISDN, PABX  
•ꢀ Distributed power architectures (24 V/48 V bus)  
•ꢀ Industrial controls  
Total Device  
Dissipation3  
Product4  
Max  
0.5 W  
0.75 W  
1 W  
1.5 W  
Power  
Output1  
DPA4227,8  
DPA423  
DPA424  
DPA425  
6.5 W  
9 W  
9.0 W  
13 W  
-
-
-
-
9.0 W  
13 W  
26 W  
52 W  
Description  
The DPA-Switch IC family is a highly integrated solution for  
DC-DC conversion applications with 16-75 VDC input.  
10 W  
14.5 W  
18 W  
24 W  
6
6
6
-
-
-
25.5 W  
DPA-Switch uses the same proven topology as TOPSwitch®,  
cost effectively integrating a power MOSFET, PWM control, fault  
protection and other control circuitry onto a single CMOS chip.  
High performance features are enabled with three user  
configurable pins. Hysteretic thermal shutdown is also provided.  
In addition, all critical parameters (i.e. current limit, frequency,  
PWM gain) have tight temperature and absolute tolerance, to  
simplify design and reduce system cost.  
Table 1. Output Power Table.  
Notes:  
1. Maximum output power is limited by device internal current limit.  
2. See Applications Considerations section for complete description of assumptions  
and for output powers with other input voltage ranges.  
3. For device dissipation of 1.5 W or below, use P or G packages. Device  
dissipation  
above 1.5 W is possible with R package.  
4. Packages: P: DIP-8, G: SMD-8, R: TO-263-7C. For lead-free package options,  
see Part Ordering Information.  
5. Available in R package only.  
6. Due to higher switching losses, the DPA425 may not deliver additional power  
compared to a smaller device.  
7. Available in P and G package only.  
8. DPA422 not recommended for new designs, use DPA423 instead.  
www.powerint.com  
December 2012  
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DPA423R 替代型号

型号 品牌 替代类型 描述 数据表
DPA423R-TL POWERINT

完全替代

 Highly Integrated DC-DC Converter ICs for Distributed Power Architectures

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