DPA424PN-TL データシートの表示（PDF） - Power Integrations, Inc

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DPA424PN-TL

Highly Integrated DC-DC Converter ICs for Power over Ethernet & Telecom Applications

Power Integrations, Inc 

DPA422-426

DPA-Switch™ Family

Highly Integrated DC-DC Converter ICs for

Power over Ethernet & Telecom Applications

Product Highlights

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

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

• Externally programmable current limit

• 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

EcoSmart™– Energy Efficient

• Extremely low consumption at no-load

• Cycle skipping at light load for high standby efficiency

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

Description

The DPA-Switch IC family is a highly integrated solution for

DC-DC conversion applications with 16‑75 VDC input.

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.

DPA-Switch

VIN

D

RESET/

CLAMP

CIRCUIT

S

L

CONTROL

C

XF

VO

SENSE

CIRCUIT

Figure 1. Typical Forward Converter Application.

PI-2770-032002

Output Power Table

36-75 VDC Input Range (Forward)2

Total Device

Dissipation3 0.5 W 1 W 2.5 W 4 W

Product4

Max

6 W Power

Output1

DPA4227,8

DPA423

DPA424

DPA425

DPA4265

7.5 W 10 W

-

-

-

12 W 16 W

-

-

-

16 W 23 W 35 W

-

-

23 W 32 W 50 W 62 W

-

25 W 35 W 55 W 70 W 83 W

36-75 VDC Input Range (Flyback)2

10 W

18 W

35 W

70 W

100 W

Total Device

Dissipation3 0.5 W 0.75 W

1W

Product4

1.5 W

Max

Power

Output1

DPA4227,8

DPA423

DPA424

DPA425

6.5 W

9W

10 W

-6

9.0 W

13 W

14.5 W

-6

-

-

18 W

-6

-

-

24 W

25.5 W

9.0 W

13 W

26 W

52 W

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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