PT6880 Series 5-A, 15-36-V Input Integrated Switching Regulator SLTS103B -JULY 2000 - REVISED JANUARY 2003 Features • 5A Non-Isolated Output • >90% Efficiency • Low-cost Alternative to Isolated Converters • 15 to 36V Input Voltage Range • Adjustable Output Voltage • Output Remote Sense Description Ordering Information The PT6880 product family is a series of highly efficient, non-isolated integrated switching regulator (ISR) modules. Designed to operate off a wide-input bus, these regulators produce a tightly regulated output voltage at load currents of up to 5A. The series includes standard output voltage options ranging from 2.5V to 15V. The series is an ideal choice for general purpose and industrial applications that operate off a 24/28V battery providing a low-cost alternative to a fully isolated converter. The PT6880 series is packaged in a thermally efficient, 18-pin, space-saving copper case. Both vertical and horizontal configurations are available, including surface-mount. PT6881H PT6882H PT6883H PT6884H PT6885H PT6886H = = = = = = 3.3 2.5 5.0 9.0 15.0 12.0 • • • • Standby Function Solderable Copper Case Surface Mountable IPC Lead Free 2 Pin-Out Information Pin Volts Volts Volts Volts Volts Volts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PT Series Suffix (PT1234 x ) Case/Pin Configuration Order Suffix Package Code * N A C Vertical Horizontal SMD (EPD) (EPA) (EPC) * Previously known as package styles 1500/10. (Reference the applicable package code drawing for the dimensions and PC board layout). Function Vo Adjust No Connect No Connect STBY * No Connect GND GND Vin Vin Vin GND GND GND GND Vout Vout Vout Remote Sense * For further information, see application notes. Standard Application REMOTE SENSE 18 8, 9,10 PT6880 6, 7, 11–14 + C IN COM VOUT 15,16,17 + VIN L O A D COUT COM C in = Required 560µF electrolytic C out = Required 330µF electrolytic For technical support and more information, see inside back cover or visit www.ti.com PT6880 Series 5-A, 15-36-V Input Integrated Switching Regulator Specifications SLTS103B -JULY 2000 - REVISED JANUARY 2003 (Unless otherwise stated, Ta =25°C, V in =28V, C in =560µF, C out =330µF, and I o =Io max) Characteristic Symbol Conditions Output Current Io Ta =60°C, 200LFM Input Voltage Range Vin Over Io range Set Point Voltage Tolerance Temperature Variation Line Regulation Load Regulation Total Output Voltage Variation Vo tol Regtemp Regline Regload ∆Votot Efficiency η Min Vo ≤ 12V Vo > 12V Vo = 2.5V Vo = 3.3V Vo = 5.0V Vo ≥ 6.5V –40° ≤Ta ≤ +85°C, Io =Iomin Over Vin range Over Io range Includes set-point, line, load, –40° ≤Ta ≤ +85°C Vo = 15V Vo = 12V Vo = 9.0V Vo = 5.0V Vo = 3.3V Vo = 2.5V Vo ≤5V Vo >5V Vo Ripple (pk-pk) Vr 20MHz bandwidth Transient Response ttr ∆Vtr ƒs 5A/µs load step, 50% to 100% Iomax Vo over/undershoot Over Vin and Io range Referenced to GND (pin 6) Switching Frequency On/Off Standby (Pin 4) Input High Voltage Input Low Voltage Input Low Current VIH VIL IIL Standby Input Current External Input Capacitance External Output Capacitance Operating Temperature Range Solder Reflow Temperature Storage Temperature Reliability Iin standby Cin Cout Ta Treflow Ts MTBF Mechanical Shock — Mechanical Vibration — Weight Flammability — — pins 4 & 6 connected See application schematic See application schematic Over Vin range Surface temperature of module pins or case — Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Per Mil-Std-883D, method 2002.3, 1ms, half-sine, mounted to a fixture Mil-Std-883D, Method 2007.2, Suffix N, A 20-2000Hz, soldered in PCB Suffix C 0.1 (1) 0.1 (1) 15 15 15 18 — — — — PT6880 SERIES Typ Max — — — — — — ±0.5 ±0.5 ±0.5 ±0.5 5 4 25 33 36 36 ±1 — ±1 ±1 Units A (2) (2) Vdc %Vo %Vo %Vo %Vo — ±1.5 ±2 — — — — — — — — — — 500 90 88 87 82 73 78 50 1 100 ±100 550 — — — — — — — — — — 600 %Vo 2.0 –0.1 — — 560 (4) 330 (4) –40 — –40 — — –0.5 16 — — — — — Open (3) +0.4 – 35 — 1,000 85 (5) 215 (6) 125 7.7 — — 106 Hrs — 500 — G’s — — — 20 (7) 15 (7) 23 — — — G’s % mVpp %Vo µs mV kHz V mA mA µF µF °C °C °C grams Materials meet UL 94V-0 Notes: (1) The ISR will operate at no load with reduced specifications. (2) The stated maximum input voltage assumes the nominal output voltage. If the output voltage is adjusted (trimmed) to some other value, consult the related application note on output voltage adjustment for the revised input voltage limitations. (3) The STBY* control (pin 4) has an internal pull-up and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage is low (less than 5V). Consult the related application note for interface considerations. (4) For guidance on suitable input and output capacitors consult the accompanying application note, “Capacitor Recommendations for the PT6880 Series.” (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,” (SLTA051). (7) The case pins on through-hole package types (suffixes N & A) must be soldered. For more information consult the applicable package outline drawing. For technical support and more information, see inside back cover or visit www.ti.com Typical Characteristics PT6880Series 5-A, 15-36-V Input Integrated Switching Regulator PT6881, Vout =3.3V SLTS103B -JULY 2000 - REVISED JANUARY 2003 PT6883 Vout =5V (Note A) Efficiency vs Output Current Efficiency vs Output Current 90 Efficiency vs Output Current 70 VIN 18.0V 24.0V 36.0V 70 VIN Efficiency - % 18.0V 24.0V 36.0V 90 80 Efficiency - % VIN 80 60 50 50 50 0 1 2 3 4 0 5 18.0V 24.0V 36.0V 70 60 60 1 2 3 4 0 5 0.8 1.6 Iout - (A) 18.0V 24.0V 36.0V 20 30 18.0V 24.0V 36.0V 20 VIN Ripple - mV 30 VIN Ripple - mV Ripple - mV 80 40 VIN 60 20 0 0 0 0 0 1 2 3 4 36.0V 24.0V 18.0V 40 10 10 4 100 50 40 3.2 Ripple vs Output Current Ripple vs Output Current Ripple vs Output Current 2.4 Iout - (A) Iout (A) 50 (Note A) 100 90 80 Efficiency - % PT6886, Vout =12V (Note A) 1 2 5 3 4 0 5 0.8 1.6 Iout - (A) 2.4 3.2 4 Iout - (A) Iout (A) Power Dissipation vs Output Current 6 5 4 36.0V 24.0V 18.0V 3 2 5 VIN 4 36.0V 24.0V 18.0V 3 2 Pd - Watts VIN Pd - Watts 5 Pd - Watts Power Dissipation vs Output Current Power Dissipation vs Output Current 6 6 1 1 1 2 3 4 2 0 0 0 36.0V 24.0V 18.0V 3 1 0 0 VIN 4 1 2 5 3 4 5 0 0.8 1.6 Iout - (A) 2.4 3.2 4 Iout - (A) Iout (A) SOA Curves @Vin=+24V SOA Curves @Vin=+24V (Note B) Airflow 70 200LFM 120LFM 60LFM Nat Conv 60 50 40 30 20 Ambient Temperature (°C) 80 Airflow 70 200LFM 120LFM 60LFM Nat Conv 60 50 40 30 20 0 1 2 3 Iout (A) 4 5 (Note B) 90 80 Ambient Temperature (°C) 90 90 Ambient Temperature (°C) SOA Curves @Vin=+24V (Note B) 80 Airflow 70 200LFM 120LFM 60LFM Nat Conv 60 50 40 30 20 0 1 2 3 Iout (A) 4 5 0 0.8 1.6 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 For technical support and more information, see inside back cover or visit www.ti.com 2.4 Iout (A) 3.2 4 Application Notes PT6880 Series Capacitor Recommendations for the PT6880 Regulator Series Tantalum Capacitors (For Vout <5.1V) Tantalum type capacitors can be used on the output bus for output voltages less than 5.1V. Voltages higher than this will exceed the capacitor’s published surge voltage limits. Input Capacitor: The required input capacitor is determined by a 1.2Arms minimum ripple current rating and 560µF capacitance value. The ripple current rating and <120mΩ equivalent series resistance (ESR) are the major considerations, along with temperature, when designing with different types of capacitors. Tantalum/Os-Con® capacitors are not recommended due to a minimum voltage rating of 2× (the maximum DC voltage + AC ripple). This is necessary to improve the reliability of these capacitors in high bus applications. Output Capacitors: The ESR specification of the output capacitor should be at least 50mΩ. Electrolytic capacitors have marginal ripple performance at frequencies greater than 400kHz but excellent low frequency transient response. Above the ripple frequency ceramic capacitors are necessary to improve the transient response and reduce any highfrequency noise components apparent during higher current excursions. Electrolytic capacitors with appropriate ESR values are identified in Table 1-1. In low-temperature applications (<0°C), a higher capacitance with lower ESR will improve performance. Os-Con® and ultra low ESR type capacitors are not recommended on the output bus as they degrade regulator stability. If tantalum capacitors are located on the output bus, an appropriate fuse with I2t current derating is recommended along with an external clamp component. An Output Over-voltage Clamp (OOVC) will fault the output fuse protecting the capacitors in event of an over-voltage condition. The OOVC can be a simple zener high power diode, 3-5W, located on the load side of the output bus. The zener diode should be rated to 1.3 times the normal output voltage. Capacitor Table Table 1-1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The number of capacitors required at both the input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. Table 1-1: Input/Output Capacitors Capacitor Vendor/ Series Notes: Capacitor Characteristics Quantity Working Voltage Value(µF) (ESR) Equivalent Series Resistance 105°C Maximum Ripple Current(Irms) Physical Size(mm) Input Bus Output Bus Vendor Part Number Panasonic FC (Radial) 50V 50V 50V 560 390 390 0.068Ω 0.080Ω 0.080Ω 1900mA 1610mA 1610mA 18×15 16x15 16×15 1 2 2 1 1 1 EEUFC1H561 EEUFC1H391S EEUFC1H391S FC/FK (Surface Mtg) 63V 35V 50V 680 330 1000 0080Ω 0.080Ω 0.073Ω 1690mA 850mA 1610mA 18×16.5 10×10.2 16×16.5 1 N/R (1) 1 1 1 1 EEVFK1J681M EEVFK1V331P EEVFK1H102M United Chemi-con LXZ/LXV Series 50V 35V 680 330 0.048Ω 0.068Ω 1840mA 1050mA 16×20 10×16 1 N/R (1) 1 1 LXZ50VB681M16X20LL LXV35VB331M10X16LL MVY (Surface Mtg) 35V 220 0.150Ω 670mA 10×10.3 N/R (1) 2 MVY35VC2211M10X10TP Nichicon PM Series 50V 63V 50V 560 560 330 0.044Ω 0.039Ω 0.060Ω 1550mA 1400mA 1210mA 16×20 18×20 16×15 1 1 2 1 1 1 UPM1H561MHH6 UPM1J561MHH6 UPM1H331MHH6 AVX Tantalum TPS (Surface Mtgt) 10V 10V 330 330 0.10Ω 0.06Ω >2500mA >3000mA 7.3L ×5.7W ×4.1H N/R (1) N/R (1) 1 1 TPSE337M010R0100 (Vo <5.1V) TPSV337M010R0060 (Vo <5.1V) Kemet Tantalum (2) T496 /T495 Series (Surface Mount) 10V 10V 220 220 0.500Ω 0.070Ω 500mA >2000mA 4.3W ×7.3L ×4.0H N/R (1) N/R (1) 2 2 T496X227M010AS (Vo <5.1V) T495X227M0100AS (Vo <5.1V) Sprague Tantalum (2) 594D Series (Surface Mount) 10V 330 0.130Ω 1393mA 7.2L ×6W ×4.1H N/R (1) 1 595D337X0010R2T (Vo <5.1V) (1) (2) N/R –Not recommended. The voltage rating does not meet the minimum operating limits. A fused input bus is recommended when tantalum capacitors are used on the output bus. For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT6880 Series Using the On/Off Standby Function on the PT6880 Excalibur™ Series of ISRs The PT6880 series of integrated switching regulators (ISRs) incorporate an on/off standby function, which may be used to disable the regulator output. This function is provided by the STBY* control (pin 4). If pin 4 is left open-circuit the regulator operates normally, providing a regulated output whenever a valid supply voltage is applied to Vin (pins 8–10) with respect to GND (pins 6, 7, & 11– 14). If the STBY* control is driven low to ground 1, the regulator output is disabled and the input current drawn by the ISR drops to its idle value 2. The STBY* pin must be controlled with a low-leakage open-collector (or open-drain) discrete transistor 3. See Figure 2-1 for the application schematic, and Table 2-1 for the input parameters. Turn-On Time: In the circuit of Figure 2-1, turning Q1 on applies a low voltage to pin 4 and disables the regulator output. Correspondingly, turning Q1 off removes the low-voltage signal and enables the output. Once enabled the output will typically experience a 5–10ms delay followed by a quick ramp-up of voltage. The regulator should provide a fully regulated output within 20ms. The waveforms of Figure 1-2 show the rise of both the output voltage and input current for a PT6883 (5V). The turn off of Q1 corresponds to the drop of Q1Vgs. The waveform was measured with a 24Vdc input voltage and 4-ADC load. Figure 2-2 Table 2-1 Standby Control Requirements Parameter Min Typ Enable (VIH) Disable (VIL) Istby (pin 4 =ground) Vstby (open circuit) — –0.2V Max Open Circuit 0.3V –50µA 1.4V Vo (2V/Div) 2V Iin (1A/Div) Figure 2-1 REMOTE SENSE 18 Rem Sense 8, 9,10 V IN PT6880 STBY* 4 + C IN VO VOUT 15,16,17 HORIZ SCALE: 5ms/Div GND 6, 7, 11–14 + VIN Q1Vgs (10V/Div) L O A D C OUT Q1 BSS138 1 =Inhibit COM COM Notes: 1. To ensure that the regulator output is disabled, the control pin must be pulled to less than 0.3Vdc with a low-level 0.1mA sink to ground. 2. When the regulator output is disabled the current drawn from the Vin input source is typically reduced to less than 20mA. 3. The standby control input is NOT compatible with TTL devices that incorporate a totem-pole output drive. Use only a true open-collector device, preferably a low-leakage discrete bipolar transistor (or MOSFET). Do Not use a pull-up resistor, or drive the STBY* pin with an external voltage. For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT6880 Series Adjusting the Output Voltage of the PT6880 5-A Excalibur™ Converter Series The output voltage of the Power Trends PT6880 Excalibur series of ISRs may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor 1. Table 3-1 gives the respective allowable adjustment range for each model in the series as Va (min) and Va (max). Figure 3-1 18 Vsense 8 –10 Vin PT6880 Vin STBY 4 Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 1 (Vo Adjust) and pins 6, 7 /11-14 (GND). GND 6, 7, 11 – 14 2. Never connect capacitors from Vo adjust to either GND, Vout, or the Remote Sense pin. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. If the remote sense feature is being used, connecting the resistor (R1) between pin 1 (Vo Adjust) and pin 18 (Remote Sense) can benefit load regulation. 4. For output voltages above 10Vdc, the maximum output current must be limited to 4Adc. 5. Adjustments to the output voltage may place additional limits on the input voltage for the part. The revised limits must comply with the following requirements. Vin (min) = (Vout + 3)V or 15V, whichever is higher. Vin (max) = (10 x Vout )V or 36V, whichever is less. Vo(adj) 1 (R1) Adj Down + C in C out Vo (nom) Va (min) Va (max) Ω) Ro (kΩ Ω) Rs (kΩ COM COM The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. (R1) = Ro (Vo – 1.25) (Va – 1.25) 1.25 (Vo – Va) R2 = Ro (Vo – 1.25) Va - Vo Vo Va Ro Rs = Original output voltage = Adjusted output voltage = The resistance value in Table 3-1 = The series resistance from Table 3-1 Where: – Rs PT6882 PT6881 PT6883 PT6884 PT6886 PT6885 2.5V 1.8V 4.3V 4.99 2.49 3.3V 2.2V 4.7V 4.22 4.99 5.0V 3.0V 6.5V 2.49 4.99 9.0V 6.0V 10.2V 2.0 12.7 12.0V 9.0V 13.6V 2.0 12.7 15.0V 10.0V 17.0V 2.0 12.7 For technical support and more information, see inside back cover or visit www.ti.com L O A D R2 Adjust Up Table 3-1 PT6880 ADJUSTMENT AND FORMULA PARAMETERS Series Pt # Vo + Adjust Down: Add a resistor (R1), between pin 1 (Vo Adjust) and pins 15-17 (Vout). Refer to Figure 3-1 and Table 3-2 for both the placement and value of the required resistor, either (R1) or R2 as appropriate. Notes: 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 15 –17 Vo – Rs kΩ kΩ Application Notes continued PT6880 Series Table 3-2 PT6880 ADJUSTMENT RESISTOR VALUES Series Pt # Current Vo (nom) Va (req’d) PT6882 5Adc 2.5Vdc 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 R1 = (Blue) (1.4)kΩ (2.9)kΩ (5.0)kΩ (8.1)kΩ (13.3)kΩ (23.7)kΩ (54.9)kΩ 59.9kΩ 28.7kΩ 18.3kΩ 13.1kΩ 10.0kΩ 7.9kΩ 6.4kΩ 5.3kΩ 4.4kΩ 3.8kΩ 3.2kΩ 2.7kΩ 2.3kΩ 2.0kΩ 1.7kΩ 1.4kΩ 1.2kΩ 1.0kΩ PT6881 5Adc 3.3Vdc (1.0)kΩ (2.3)kΩ (3.9)kΩ (5.8)kΩ (8.4)kΩ (11.7)kΩ (16.5)kΩ (23.6)kΩ (35.4)kΩ (59.0)kΩ (130.0)kΩ 81.5kΩ 38.3kΩ 23.8kΩ 16.6kΩ 12.3kΩ 9.4kΩ 7.4kΩ 5.8kΩ 4.6kΩ 3.7kΩ 2.9kΩ 2.2kΩ 1.7kΩ 1.2kΩ PT6883 5Adc 5Vdc (1.6)kΩ (2.3)kΩ (3.1)kΩ (4.0)kΩ (5.1)kΩ (6.2)kΩ (7.6)kΩ (9.1)kΩ (10.9)kΩ (13.0)kΩ (15.6)kΩ (18.7)kΩ (22.6)kΩ (27.6)kΩ (34.2)kΩ (43.6)kΩ (57.6)kΩ (80.9)kΩ (128.0)kΩ (268.0)kΩ 88.4kΩ 41.7kΩ 26.1kΩ 18.4kΩ 13.7kΩ 10.6kΩ 8.4kΩ 6.7kΩ 5.4kΩ 4.4kΩ 3.5kΩ 2.8kΩ 2.2kΩ 1.7kΩ 1.2kΩ Series Pt # Current Vo (nom) Va (req’d) 6.0 6.2 6.4 6.6 6.8 7.0 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 8.8 9.0 9.2 9.4 9.6 9.8 10.0 10.2 10.4 10.6 10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2 13.4 13.6 13.8 14.0 14.2 14.5 15.0 15.5 16.0 16.5 17.0 PT6884 5Adc 9Vdc PT6886 4Adc 12Vdc PT6885 4Adc 15Vdc (6.9)kΩ (9.2)kΩ (11.9)kΩ (14.0)kΩ (18.6)kΩ (23.0)kΩ (28.3)kΩ (35.0)kΩ (43.5)kΩ (55.0)kΩ (71.0)kΩ (95.0)kΩ (135.0)kΩ (215.0)kΩ (455.0)kΩ 64.8kΩ 26.1kΩ 13.1kΩ 6.7kΩ 2.8kΩ 0.2kΩ (31.7)kΩ (36.1)kΩ (41.2)kΩ (47.1)kΩ (54.1)kΩ (62.6)kΩ (72.8)kΩ (85.7)kΩ (102.0)kΩ (124.0)kΩ (155.0)kΩ (201.0)kΩ (278.0)kΩ (432.0)kΩ (895.0)kΩ 94.8kΩ 41.1kΩ 23.1kΩ 14.2kΩ 8.8kΩ 5.2kΩ 2.7kΩ 0.7kΩ (25.8)kΩ (28.3)kΩ (31.1)kΩ (34.1)kΩ (37.3)kΩ (40.9)kΩ (44.9)kΩ (49.3)kΩ (54.3)kΩ (59.8)kΩ (66.1)kΩ (73.3)kΩ (81.6)kΩ (91.3)kΩ (103.0)kΩ (117.0)kΩ (133.0)kΩ (154.0)kΩ (181.0)kΩ (217.0)kΩ (268.0)kΩ (343.0)kΩ (570.0)kΩ 42.3kΩ 14.8kΩ 5.6kΩ 1.1kΩ R2 = Black For technical support and more information, see inside back cover or visit www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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