PT4523

PT4520 TI | Alldatasheet

Document overview

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Technical content

Features

• Input Voltage Range: 36V to 75V
• 20W Rated
• Output Voltages: 1.2V to 15V
• 82% Efficiency
• 1500 VDC Isolation
• Low Profile (8.5 mm)
• Adjustable Output Voltage PT4520 Series 20-W 48-V Input Isolated DC/DC Converter PT4520 LOAD 4, 5 2, 3 9, 10 7, 8

612 Remote Sense (–)

Remote Sense (+) +V OUT –VOUT VO Adj +V IN –VIN Remote On/Off Q 1 BSS138 SL TS148B - JUNE 2000 - REVISED OCTOBER 2002

Ordering Information

PT4521/G72 = 3.3V/5A (16.5W) PT4522/G72 = 5.0V/4A PT4523/G72 = 12V/1.6A PT4524/G72 = 15V/1.3A PT4527/G72 = 1.8V/5A (9W) PT4528/G72 = 2.5V/5A (12.5W) PT4529/G72 = 1.2V/5A (6W) Pin-Out Information Pin Function

1 Remote On/Off *

2– V in 3– V in 4+ V in 5+ V in

6 Remote Sense (–)

7 –Vout 8 –Vout 9 +Vout 10 +Vout

11 Remote Sense (+)

12 V out Adjust *

• For further information, see application notes.

Description

The PT4520 Excalibur™ power modules are a series of isolated DC/DC converters housed a new space-saving copper case. The series includes a number of standard output voltages ranging from as low as 1.2VDC to 15VDC, each adjustable by up to 10% of nominal. The modules are ideal for T elecom, Industrial, Computer, and other distributed power applications that require input-to-output isolation. Using multiple modules, system designers can implement a complete custom power supply solution. The flexibility of f ull isolation also allows the input or output to be configured for negative voltage operation. The PT4520 series is electrically equivalent to the popular PT4120 series and requires no additional components for proper operation.

• Remote On/Off
• Differential Remote Sense
• Short Circuit Protection
• Over T emperature Shutdown
• Space Saving Package: 1.0 sq. in. PCB Area (Suffix N)
• Safety Approvals Pending
• 4×106 Hrs MTBF PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code Vertical N (ELJ) Horizontal A (ELK) SMD C (ELL) (Reference the applicable package code draw- ing for the dimensions and PC board layout)

For technical support and more information, see inside back cover or visit www.ti.com PT4520 Series 20-W 48-V Input Isolated DC/DC Converter Specifications (Unless otherwise stated, T a =25°C, Vin =48V , Cout =0µF, and Io =Iomax) PT4520 SERIES Characteristic Symbol Conditions Min Typ Max Units Output Current I o Over Vin range V o = 15V 0.1 (1) — 1.3 Input Voltage Range V in Over Io Range 36 48 75 VDC Set-Point Voltage T olerance V o tol — ±1 ±1.5 (2) %Vo T emperature Variation Reg temp –40° ≤Ta ≤ +85°C, Io =Iomin — ±0.5 — %V o Line Regulation Reg line Over Vin range — ±0.2 ±1 %V o Load Regulation Reg load Over Io range — ±0.4 ±1 (2) %Vo T otal Output Voltage Variation ∆Votot Includes set-point, line, load, —± 2± 3 (2) %Vo–40° ≤Ta ≤ +85°C Efficiency η Vo = 15V — 86 — Vo = 12V — 83 — Vo =5.0V — 82 — Vo =3.3V — 78 — % Vo =1.8V — 67 — Vo =1.5V — 65 — Vo =1.2V — 59 — Vo Ripple (pk-pk) V r 20MHz bandwidth V o ≥ 5.0V — 0.5 — %V o Vo ≤ 3.3V — 15 — mV pp Transient Response t tr 0.1A/µs load step, 50% to 100% Iomax — 100 — µs ∆Vtr Vo over/undershoot V o ≥ 5.0V — ±3 — %V o Vo ≤ 3.3V — ±150 — mV Current Limit Threshold I lim Vin =36V , ∆Vo = –50mV — 200 — %I omax Output Voltage Adjust V o adj — ±10 — % Switching Frequency ƒ s Over Vin range V o ≥ 5.0V 600 650 700 kHzVo ≤ 3.3V 800 850 900 Under-Voltage Lockout UVLO — 31 — V Remote On/Off (Pin 1) Referenced to –V in (pin 2) High-Level Input Voltage V IH 2.5 — Open (3) V Low-Level Input Voltage VIL –0.2 — 0.8 Low-Level Input Current I IL — –10 – µA Standby Input Current I in standby pins 1 & 2 connected — 7 10 mA Internal Input Capacitance C in — 0.5 — µF External Output Capacitance C out 0 — 220 (4) µF Isolation Voltage Input–output/input–case 1500 — — V Capacitance Input to output — 1100 — pF Resistance Input to output 10 — — M Ω Operating T emperature Range T a Over Vin range –40 — 85 (5) °C Solder Reflow T emperature T reflow Surface temperature of module pins or case — — 215 (6) °C Storage T emperature T s — –40 — 125 °C Reliability MTBF Per Bellcore TR-332 4 — — 10 6 Hrs50% stress, Ta =40°C, ground benign Mechanical Shock — Per Mil-Std-883D, method 2002.3, — 500 — G’s1mS, half-sine, mounted to a fixture Mechanical Vibration — Mil-Std-883D, method 2007.2, Suffix N — 20 (7) — G’s20-2000Hz , soldered Suffixes A & C — 20 (7) — Weight — — — 23 — grams Flammability — Materials meet UL 94V-0 Notes: (1)The DC/DC converter will operate at no load with reduced specifications. (2) For optimum voltage accuracy the ‘Remote Sense (+)’ and ‘Remote Sense (–)’ pins must be connected to +V out and –Vout respectively. (3)The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the PT4520 will operate when input power i s applied. Refer to the application notes for interface considerations. (4)External output capacitance is not required for proper operation. Capacitamce may be added to improve the response to load t ransients. The maximum total capacitance (including the load circuit) must not exceed 220µF, and the combined ESR of must not be less than 100m Ω . (5)See Safe Operating Area curves or contact the factory for the appropriate derating. (6)During solder reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215°C. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products,” (SLTA 051). (7)The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable p ackage outline drawing. SL TS148B - JUNE 2000 - REVISED OCTOBER 2002

For technical support and more information, see inside back cover or visit www.ti.com Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current PT4521, 3.3 VDC (See Note A) Safe Operating Area, V in =48V (See Note B) Typical CharacteristicsPT4520 Series 20-W 48-V Input Isolated DC/DC Converter 0 0.4 0.8 1.2 1.6 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 72.0V VIN 0 0.4 0.8 1.2 1.6 Iout (A) Ripple - mV 72.0V 60.0V 48.0V 36.0V VIN 01234 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 72.0V VIN 01234 Iout (A) Pd - Watts 72.0V 60.0V 48.0V 36.0V VIN 012345 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 72.0V VIN 012345 Iout (A) Ripple - mV 72.0V 60.0V 48.0V 36.0V VIN 012345 Iout (A) Pd - Watts 72.0V 60.0V 48.0V 36.0V VIN PT4522, 5 VDC (See Note A) PT4523, 12 VDC (See Note A) Efficiency vs Output Current Efficiency vs Output Current Ripple vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Power Dissipation vs Output Current 01234 Iout (A) Ripple - mV 72.0V 60.0V 48.0V 36.0V VIN 0 0.4 0.8 1.2 1.6 Iout (A) Pd - Watts 72.0V 60.0V 48.0V 36.0V VIN 012345 Iout (A) Ambient Temperature (°C) 300LFM 200LFM 100LFM Nat conv Airflow 01234 Iout (A) Ambient Temperature (°C) 300LFM 200LFM 100LFM Nat conv Airflow Safe Operating Area, V in =48V (See Note B) Safe Operating Area, V in =48V (See Note B) Iout (A) Ambient Temperature (°C) 300LFM 200LFM 100LFM Nat conv Airflow SL TS148B - JUNE 2000 - REVISED OCTOBER 2002

For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT4500/PT4520 Series Operating Features and System Considerations for the PT4500/PT4520 DC/DC Converters Output Current Limit The PT4500 and PT4520 series of DC/DC converters incorporate an output current limit. This protects both the module and upstream source against load faults. Applying a load, in excess of the current limit threshold, will sim- ply cause the output voltage to drop. The output current remains limited, but continues to flow in the fault. The drop in output voltage will vary according to the severity of the fault. Applying a short circuit to the output will result in an output voltage of zero, and the fault current will be limited to a value slightly higher than the current limit threshold. Upon the removal of the load fault, the output voltage of the module will fully recover to its normal regulated output voltage. Primary-Secondary Isolation The PT4500 and PT4520 series of DC/DC converters incorporate electrical isolation between the input termi- nals (primary) and the output terminals (secondary). All converters are production tested to a withstand voltage of 1500VDC. The isolation complies with UL60950 and EN60950, and the requirements for operational isolation. This allows the converter to be configured for either a positive or negative input voltage source. Output Voltage Adjustment The output voltage is typcially adjustable over a range of ±10% of nominal. Consult the separate application note, “Ajusting the Output Voltage of the PT4500/PT4520 Series of Isolated DC/DC Converters.” Remote On/Off Function The output voltage from the converter can be turned off from the primary side using the Remote On/Off control (pin 1). Consult the separate application note, “Using the Remote On/Off Function on the PT4500/PT4520 Series of Isolated DC/DC Converters.” Under-Voltage Lock-Out The Under-Voltage Lock-Out (UVLO) circuit prevents operation of the converter whenever the input voltage to the module is insufficient to maintain output regulation. Below the UVLO threshold the module is off and the Remote On/Off control (pin 1) is inoperative. T able 1-2 gives the applicable UVLO thresholds. Table 1-2; UVLO Thresholds Series UVLO Threshold V in Range PT4520 31V T ypical 36 – 75V PT4500 16.5V T ypical 18 – 40V Turn-On Time The typical turn-on time is typically 35 milliseconds at V in =48V . This is from application of input power, or the removal of a low-voltage signal from the Remote On/Off (pin 1). This includes about about 5–10ms of delay time before the output voltage begins to ri se. T urn-on time will vary slightly with input voltage, output load, and the total amount of capacitance connected to the output. Input Current Limiting The converter is not internally fused. For safety and overall system protection, the maximum input current to the converter must be limited. Active or passive current limiting can be used. Passive current limiting can be a fast acting fuse. A 125-V fuse, rated no more than 5A, is recommended. Active current limiting can be imple- mented with a current limited “Hot-Swap” controller. Thermal Considerations Airflow may be necessary to ensure that the module can supply the desired load current in environments with elevated ambient temperatures. The required airflow rate may be determined from the Safe Operating Area (SOA) thermal derating curves. These are provided in the “T ypical Characteristics” section of the converter specifications.

For technical support and more information, see inside back cover or visit www.ti.com Adjusting the Output Voltage of the PT4500/ PT4520 Series of Isolated DC/DC Converters The factory pre-set output voltage of TI’s PT4500 and PT4520 series of isolated DC/DC converters may be adjusted within a nominal ±10% range. Adjustment is made from the secondary side of the regulator 1 with a single external resistor. For the input voltage range specified in the data sheet T able 2-1 gives the allowable adjustment range for each model, as V o (min) and Vo (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor, R 2 between Vo Adjust (pin 12), and –Vout (pin 7, 8). Adjust Down: Add a resistor (R1), between Vo Adjust (pin 12), and +Vout (pin 9, 10). Refer to Figure 2-1 and T able 2-2 for both the placement and value of the required resistor, (R 1) or R2. Notes: 1. The PT4500 and PT4520 series of DC/DC converters incorporate isolation between the ±Vin and ±Vo terminals. Adjustment of the output voltage is made to the regulation circuit on the secondary or output side of the converter. 2. The maximum rated output power for this series is 20W. An increase in the output voltage may therefore require a corresponding reduction in the maximum output current ( see Table 2-1). The revised maximum output current must be determined as follows. Io(max) = 20 A, or 5A, whichever is less. Va Where Va is the adjusted ouput voltage. 3. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the module as possible. Table 2-1 DC/DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # 48V Bus PT4529 PT4526 PT4527 PT4528 PT4521 PT4522 PT4523 PT4524 24V Bus PT4509 PT4506 PT4507 PT4508 PT4501 PT4502 PT4503 PT4504 Max Current 2 5A 5A 5A 5A 5A 4A 1.6A 1.3A Figure 2-1 (R1) Adj Down Adjust Up +V in –V in +V o –V o PT4500/4520 +Vout –Vout +Vin –Vin Remote On/Off V o (adj) 2, 3 4, 5 9,10 7, 8 4. Never connect capacitors to V o adjust. Any capacitance added to the V o adjust control pin will affect the stability of the converter. The values of (R1) [adjust down], and R 2 [adjust up], can also be calculated using the following formulas. (R1) = Ko(Va – Vr) – Rs kΩVr (Vo – Va) R2 = Ko – Rs kΩ (Va – Vo) Where V o = Original output voltage Va = Adjusted output voltage Vr = Reference voltage (T able 2-1) Ko = Multiplier constant (T able 2-1) Rs = Internal series resistance (T able 2-1) PT4500/4520 Series

For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued PT4522 PT4502 5.0Vdc Va(req’d) 4.5 (12.6)kΩ 4.55 (40.3)kΩ 4.6 (75.0)kΩ 4.65 (120.0)kΩ 4.7 (179.0)kΩ 4.75 (262.0)kΩ 4.8 (387.0)kΩ 4.85 (595.0)kΩ 4.9 (1.01)MΩ 4.95 5.0 5.05 5.1 1.06M Ω 5.15 645.0k Ω 5.2 437.0k Ω 5.25 312.0k Ω 5.3 229.0k Ω 5.35 169.0k Ω 5.4 125.0k Ω 5.45 90.2k Ω 5.5 62.4k Ω 48V Bus PT4529 PT4526 PT4527 PT4528 PT4521 24V Bus PT4509 PT4506 PT4507 PT4508 PT4501 Va(req’d) 1.05 (15.1)kΩ 1.1 (126.0)kΩ 1.15 (458.0)kΩ 1.2 1.25 543.0k Ω 1.3 197.0k Ω 1.35 81.1k Ω (2.8)kΩ 1.4 (53.2)kΩ 1.45 (204.0)kΩ 1.5 1.55 1.3M Ω 1.6 627.0k Ω 1.65 404.0k Ω (51.7)kΩ 1.7 (161.0)kΩ 1.75 (489.0)kΩ 1.8 1.85 1.28M Ω 1.9 587.0k Ω 1.95 355.0k Ω 2.25 (26.5)kΩ 2.3 (92.9)kΩ 2.35 (203.0)kΩ 2.4 (425.0)kΩ 2.45 (1.09)MΩ 2.5 2.55 1.09M Ω 2.6 450.0k Ω 2.65 237.0k Ω 2.7 131.0k Ω 2.75 67.7k Ω 2.95 (90.7)kΩ 3.0 (146.0)kΩ 3.05 (224.0)kΩ 3.1 (341.0)kΩ 3.15 (536.0)kΩ 3.2 (926.0)kΩ 3.25 (2.09.0)MΩ 3.3 3.35 1.19M Ω 3.4 502.0k Ω 3.45 272.0k Ω 3.5 158.0k Ω 3.55 88.7k Ω 3.6 42.7k Ω 3.65 9.9k Ω Table 2-2 DC/DC CONVERTER SERIES ADJUSTMENT RESISTOR VALUES Series Pt # R1 = (Blue) R2 = Black PT4523 PT4524 PT4503 PT4504 12.0Vdc 15.0Vdc Va(req’d) 10.8 (276.0)kΩ 11.0 (365.0)kΩ 11.2 (497.0)kΩ 11.4 (719.0)kΩ 11.6 (1.16)MΩ 11.8 12.0 12.2 588.0k Ω 12.4 239.0k Ω 12.6 123.0k Ω 12.8 64.6k Ω 13.0 29.7k Ω 13.2 6.4k Ω 13.5 (312.0)kΩ 13.6 (345.0)kΩ 13.8 (427.0)kΩ 14.0 (542.0)kΩ 14.2 (713.0)kΩ 14.4 (1.0)MΩ 14.6 (1.57)MΩ 14.8 15.0 15.2 597.0k Ω 15.4 253.0k Ω 15.6 138.0k Ω 15.8 81.0k Ω 16.0 46.6k Ω 16.5 0.8k Ω PT4500/4520 Series

Orderable Device Status(1) Package Type Package Drawing Pins Package Qty Eco Plan(2) Lead/Ball FinishMSL Peak Temp (3) PT4521A ACTIVE SIP MOD ULE ELK 12 10 TBD Call TI Level-1-215C-UNLIM PT4521C ACTIVE SIP MOD ULE ELL 12 10 TBD Call TI Level-3-215C-168HRS PT4522A ACTIVE SIP MOD ULE ELK 12 10 TBD Call TI Level-1-215C-UNLIM PT4522C ACTIVE SIP MOD ULE ELL 12 10 TBD Call TI Level-3-215C-168HRS PT4522N ACTIVE SIP MOD ULE ELJ 12 10 TBD Call TI Level-1-215C-UNLIM PT4523A ACTIVE SIP MOD ULE ELK 12 10 TBD Call TI Level-1-215C-UNLIM PT4523C ACTIVE SIP MOD ULE ELL 12 10 TBD Call TI Level-3-215C-168HRS PT4523N ACTIVE SIP MOD ULE ELJ 12 10 TBD Call TI Level-1-215C-UNLIM PT4524A ACTIVE SIP MOD ULE ELK 12 10 TBD Call TI Level-1-215C-UNLIM PT4524C ACTIVE SIP MOD ULE ELL 12 10 TBD Call TI Level-3-215C-168HRS PT4524N ACTIVE SIP MOD ULE ELJ 12 10 TBD Call TI Level-1-215C-UNLIM PT4529A ACTIVE SIP MOD ULE ELK 12 10 TBD Call TI Level-1-215C-UNLIM PT4529C ACTIVE SIP MOD ULE ELL 12 10 TBD Call TI Level-3-215C-168HRS PT4529N ACTIVE SIP MOD ULE ELJ 12 10 TBD Call TI Level-1-215C-UNLIM (1)The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontentfor the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS):TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br):TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on PACKAGE OPTION ADDENDUM www.ti.com 13-Oct-2005 Addendum-Page 1

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. PACKAGE OPTION ADDENDUM www.ti.com 13-Oct-2005 Addendum-Page 2

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