DPA423GN Power Integrations, DPA423GN Datasheet
DPA423GN
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DPA423GN Summary of contents
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DPA423-426 DPA-Switch Highly Integrated DC-DC Converter ICs for Power over Ethernet & Telecom DC-DC 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 ...
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DPA423-426 Functional Block Diagram ....................................................................................................................................... 3 Pin Functional Description ...................................................................................................................................... 3 DPA-Switch Family Functional Description ............................................................................................................ 4 CONTROL (C) Pin Operation .................................................................................................................................. 4 Oscillator and Switching Frequency ....................................................................................................................... 5 Pulse Width Modulator & Maximum Duty Cycle ..................................................................................................... 6 Minimum Duty ...
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V C CONTROL ( SHUNT REGULATOR/ ERROR AMPLIFIER - + 5 (LIMIT) CURRENT LIMIT ADJUST START ON/OFF EXTERNAL CURRENT LIMIT ( LINE-SENSE ( OV/UV ...
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DPA423-426 DPA-Switch Family Functional Description DPA-Switch is an integrated switched mode power supply chip that converts a current at the control input to a duty cycle at the open drain output of a high voltage power MOSFET. During normal operation ...
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V, the control circuitry is activated and the soft-start begins. The soft-start circuit gradually increases the duty cycle of the MOSFET from zero to the maximum value over approximately 5 ms. The high voltage current source is turned ...
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DPA423-426 Pulse Width Modulator and Maximum Duty Cycle The pulse width modulator implements voltage mode control by driving the output MOSFET with a duty cycle inversely proportional to the current into the CONTROL pin that is in excess of the ...
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UV upper threshold has been reached again. Then, a soft-start will be initiated the next time CONTROL pin voltage reaches 5.8.V. If the power supply loses regulation before reaching the UV lower threshold, the device will enter auto-restart. At the ...
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DPA423-426 (typical), the CONTROL pin goes into the hysteretic mode of operation. In this mode, the CONTROL pin goes through alternate charge and discharge cycles between 4.8 V and 5.8 V (see CONTROL Pin Operation section above) and the IC ...
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Using Feature Pins FREQUENCY (F) Pin Operation The FREQUENCY pin is a digital input pin. Shorting the FREQUENCY pin to SOURCE pin selects the nominal switching frequency of 400 kHz (Figure 9) which is suited for most applications. For other ...
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DPA423-426 (Enabled) Output MOSFET Switching (Disabled) I (Default) LIMIT Current Limit -21.5 µA -25.5 µ Pin Voltage -250 -200 -150 -100 X Pin Current (µA) Note: These figures provide idealized functional characteristics with typical performance values. Please ...
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CONTROL (C) EXTERNAL CURRENT LIMIT (X) LINE-SENSE (L) Figure 8. LINE-SENSE (L), and EXTERNAL CURRENT LIMIT (X) Pin Input Simplified Schematic. DPA-Switch 230 µA (Negative Current Sense - ON/OFF, Current Limit Adjustment (Voltage Sense) 1 ...
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DPA423-426 Typical Uses of FREQUENCY (F) Pin + DC D Input CONTROL Voltage Figure 9. 400 kHz Frequency Operation. Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins + DC Input Voltage D L CONTROL ...
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Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont Input Voltage CONTROL Figure 15. Externally Set Current Limit output or can be replaced by a manual ...
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DPA423-426 Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont.) + 619 kΩ Input CONTROL Voltage Figure 21. Active-on Remote ON/OFF with LINE-SENSE and EXTERNAL CURRENT ...
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Application Examples µH IN 2.5 A 36-75 VDC R1 619 kΩ 1% C1, C2 & µF 100 CONTROL CONTROL S X VR1 SMBJ 18.2 kΩ 150 V IN *Optional components Figure ...
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DPA423-426 + VDC J1 MΩ 619 kΩ 200 V C1 VR1 1 µF D SMAJ 100 V 150A CONTROL J1-2 Figure 26. A Cost ...
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L1 J1-1 PoE Interface 1 µH 2 VR51 28 V 500 mW R52 20 kΩ µF DC R51 100 V Input 24.9 kΩ Voltage 1% 1/4 W C51 D51 D52 BAV19 BAV19 ...
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DPA423-426 Key Application Considerations DPA-Switch Design Considerations Power Table This section provides a description of the assumptions used to generate the power tables (Tables 1 and 3 through 6) and explains how to use the information provided by them. All ...
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DPA425 would dissipate 0.5 W. Selecting DPA425 with associated reduced dissipation would increase overall converter efficiency by approximately 2%. Issues Affecting Dissipation: 1) Using synchronous rectification will tend to reduce device dissipation. 2) Designs with lower output voltages ...
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DPA423-426 the input decoupling capacitor. The SOURCE pin should not be used to return the power currents; incorrect operation of the device may result. The SOURCE is only intended as a signal ground. The device tab (SOURCE) is the correct ...
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Solder Side Component Side TOP VIEW V + DPA-Switch - V Maximize hatched copper area for optimum heat sinking Via between board layers V Figure 28. Layout Considerations for DPA-Switch Using S-PAK or R Package. Top Side PCB Bottom Side ...
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DPA423-426 DRAIN Voltage .................................. ................ -0 220 V DRAIN Peak Current: DPA423......................................1.75 A DPA424....................................... 3.5 A DPA425........................................... 7A DPA426....................................... 9.6 A CONTROL Voltage ................................................ -0 CONTROL Current .................................................... 100 mA LINE SENSE Pin Voltage ...
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Parameter Symbol CONTROL FUNCTIONS (cont.) Softstart Time t SOFT PWM Gain DC reg PWM Gain Temperature Drift Dynamic Z Impedance C Dynamic Impedance Temperature Drift CONTROL Pin Internal Filter Pole SHUTDOWN/AUTO-RESTART CONTROL Pin I Charging Current C(CH) Charging Current Temperature ...
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DPA423-426 Parameter Symbol LINE-SENSE (L) AND EXTERNAL CURRENT LIMIT (X) INPUTS (cont.) Line Overvoltage or Remote ON/ OFF Threshold I OV Current and Hysteresis (L Pin) Remote ON/OFF Negative Thresh- old Current and I REM Hysteresis (X Pin) L Pin ...
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Parameter Symbol FREQUENCY (F) INPUT FREQUENCY Pin V Threshold Voltage F FREQUENCY Pin I Input Current F FREQUENCY Pin t Delay Time delay(VF) CIRCUIT PROTECTION Self Protection Current Limit (See I LIMIT Note B) Initial Current I Limit INIT Leading ...
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DPA423-426 Parameter Symbol OUTPUT (cont.) Breakdown BV Voltage DSS Rise Time t R Fall Time t F SUPPLY VOLTAGE CHARACTERISTICS DRAIN Supply Voltage Shunt Regulator V Voltage C(SHUNT) Shunt Regulator Temperature Drift CONTROL I CD1 Supply/Discharge Current I CD2 NOTES: ...
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DRAIN VOLTAGE Figure 30. Duty Cycle Measurement. 120 100 Dynamic 1 = Impedance Slope CONTROL Pin Voltage (V) Figure 31. CONTROL Pin I-V Characteristic 470 Ω 0-15 V ...
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DPA423-426 BENCH TEST PRECAUTIONS FOR EVALUATION OF ELECTRICAL CHARACTERISTICS The following precautions should be followed when testing DPA-Switch by itself outside of a power supply. The schematic shown in Figure 33 is suggested for laboratory testing of DPA-Switch. When the ...
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Typical Performance Characteristics (cont.) 1.2 1.0 0.8 0.6 0.4 0.2 0 -50 - Junction Temperature (°C) Figure 36. Frequency vs. Temperature. 1.2 1.0 0.8 0.6 0.4 0.2 0 -50 - Junction Temperature (°C) Figure ...
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DPA423-426 Typical Performance Characteristics (cont.) 1 1.375 - I x 843 kΩ 1.4 ≤ ≤ -200 µA -25 µ 1.2 1.0 0.8 0.6 0.4 0.2 0 -225 -175 -125 -250 -200 -150 -100 EXTERNAL ...
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Typical Performance Characteristics (cont Scaling Factors: T DPA423 = 0.18 CASE 16 DPA424 = 0.36 DPA425 = 0.72 14 DPA426 = 1. Drain Voltage (V) Figure 48. ...
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DPA423-426 DIM inches mm A 0.367-0.387 9.32-9.83 B 0.240-0.260 6.10-6.60 C 0.125-0.145 3.18-3.68 G 0.015-0.040 0.38-1.02 H 0.120-0.140 3.05-3.56 J1 0.057-0.068 1.45-1.73 J2 0.014-0.022 0.36-0.56 K 0.008-0.015 0.20-0.38 L 0.100 BSC 2.54 BSC M 0.030 (MIN) 0.76 (MIN) N 0.300-0.320 ...
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Ref .024 (0.61) .034 (0.86) .315 (8.00) .380 (9.65) .638 (16.21) .050 (1.27) .038 (0.97) TO-263-7C .245 (6.22) MIN .225 (5.72) MIN .580 (14.73) ...
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DPA423-426 9.25 (0.364) A 9.55 (0.376) 0.75 (0.029) 1.30 (0.051) 7.85 (0.309) 8.15 (0.321) PIN #1 6X 0.63-0.89 (0.025-0.035) 0.25 (0.010 1.75 (0.069) 2.05 (0.081) 6X 0.10 (0.004) C Notes: 1. JEDEC reference: MO-169. 2. ...
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Revision Notes F 1) Final release data sheet Updated Figure 25 and text description Corrected missing text on page 9 and corrected Table 4. 2) Updated R package description. 3) Revised thermal impedances (θ 4) Updated ...
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