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DPA424 データシート(PDF) 1 Page - Power Integrations, Inc.

部品番号 DPA424
部品情報  Highly Integrated DC-DC Converter ICs for Distributed Power Architectures
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メーカー  POWERINT [Power Integrations, Inc.]
ホームページ  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

DPA424 データシート(HTML) 1 Page - Power Integrations, Inc.

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Figure 1. Typical Forward Converter Application.
Table 1. 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 only with R package. 4. See
Part Ordering Information. 5. Due to higher switching losses, the DPA425
may not deliver additional power compared to a smaller device.
DPA423-426
DPA-Switch Family
Highly Integrated DC-DC Converter ICs
for Distributed Power Architectures
The following transparent or built-in features are also provided:
soft-start, cycle skipping down to zero load and hysteretic
thermal shutdown. In addition, all critical parameters (i.e.
current limit, frequency, PWM gain) have tight temperature
and absolute tolerance, to simplify design and optimize system
cost.
Product Highlights
Highly Integrated Solution
• Eliminates 20-50 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
Superior Performance and Flexibility
• 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
• Source connected tab reduces EMI
• Line under-voltage (UV) detection: meets ETSI standards
• Line overvoltage (OV) shutdown protection
• Low cost synchronous rectification: line UV/OV shut down
limits gate drive voltage range from transformer winding
• Fully integrated soft-start for minimum stress/overshoot
• Externally programmable current limit
• Supports forward or flyback topology
• Cycle skipping: regulation to zero load without pre-load
• Hysteretic thermal shutdown for automatic fault recovery
EcoSmart
- Energy Efficient
• Extremely low consumption at no load
• Cycle skipping at light load for high standby efficiency
Applications
• Telco central office equipment: xDSL, ISDN, PABX, etc.
• Distributed power architectures (24 V/48 V bus, etc.)
• Digital feature phones, VoIP phones, PoE
• Industrial controls (24 V/48 V)
Description
The DPA-Switch IC family introduces a highly integrated
solution for DC-DC conversion applications in the 16-75 VDC
input range.
DPA-Switch uses the same proven topology as TOPSwitch, cost
effectively integrating the high voltage 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.
®
January 2004
PRODUCT4
OUTPUT POWER TABLE
12 W 16 W
-
-
-
18 W
16 W 23 W 35 W
-
-
35 W
23 W 32 W 50 W 62 W
-
70 W
25 W 35 W 55 W 70 W 83 W 100 W
DPA423
DPA424
DPA425
DPA426
36-75 VDC INPUT RANGE (FORWARD)2,4
Total Device
Dissipation3 0.5 W 1 W 2.5 W
4 W
6 W
Max
Power
Output1
PI-2770-032002
D
S
C
DPA-Switch
VIN
VO
F
X
L
CONTROL
SENSE
CIRCUIT
RESET/
CLAMP
CIRCUIT
PRODUCT4
9 W
13 W
-
-
13 W
10 W 14.5 W 18 W
24 W
26 W
-5
-5
-5
25.5 W
52 W
DPA423
DPA424
DPA425
36-75 VDC INPUT RANGE (FLYBACK)2
Total Device3
Dissipation
0.5 W
0.75 W
1 W
1.5 W
Max
Power
Output1


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