PT4310 Series —48V 6-W Low-Profile Dual-Output Isolated DC/DC Converter SLTS146B - MARCH 2001 - REVISED MAY 2004 Features • • • • • • • • Dual Complimentary Outputs Wide Input Voltage: 38 V to 75 V 1,500 VDC Isolation 9 Pin DIP Package Low-Profile (8mm) Pin-compatible with PT4300 Series No External Components Required Safety Approvals: UL / cUL 60950 EN 60950 Description Ordering Information The PT4310 modules are a low-power series of isolated DC/DC converters that produce a dual complimentary output. The PT4310 series is pin-compatible with the PT4300 series, and has improved temperature compensation. These modules are an ideal alternative to the PT4300 for both new and existing designs. Applications include Telecom and Datacom systems where both board space and height are a premium. The PT4310 series is offered in an openframe lightweight package, and is available in both through-hole or SMD-DIP package types. Models include the standard output voltages, ±5 V, ±12 V, and ±24 V. The output voltages are adjustable by up to 5%. PT4311G PT4313G PT4314G Pin-Out Information = ±5 V/1.2 A = ±12 V/0.5 A = ±24 V/0.25 A Pin PT Series Suffix (PT1234 x ) Case/Pin Configuration Order Suffix A C Horizontal SMD Package Code (EGK) (EGL) (Reference the applicable package code drawing for the dimensions and PC board layout) Package Top View Vo 1 (+) COM Vo 2 (–) 1 2 3 18 17 +Vin –Vin 12 11 ±Vo Adjust # Remote On/Off # PT4310 N/C N/C 8 9 # For more information on the Remote On/Off control and output voltage adustment, refer to the application notes. For technical support or further information, visit http://power.ti.com Function 1 Vo1 (+) 2 COM 3 Vo2 (–) 8 N/C 9 N/C 11 Remote On/Off # 12 ±Vout Adjust # 17 –Vin 18 +Vin PT4310 Series —48V 6-W Low-Profile Dual-Output Isolated DC/DC Converter SLTS146B - MARCH 2001 - REVISED MAY 2004 Environmental Specifications PT4310 Series Typ Characteristic Symbol Conditions Min Max Units Operating Temperature Range Solder Reflow Temperature Storage Temperature Reliability Ta Treflow Ts MTBF –40 — –40 4.0 — — — — +85 (i) 215 +125 — °C °C °C 106 Hrs Mechanical Shock — — 500 — G’s Mechanical Vibration — — 20 — G’s Weight Flammability — — Over Vin range Surface temperature of module, case or pins — Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Per Mil-Std-883D, method 2002.3, 1 mS, half-sine, mounted to a fixture Per Mil-Std-883D, method 2007.2, 20-2000 Hz, soldered in a PC board — Materials meet UL 94V-0 — 10 — grams Notes: (i) See Safe Operating Area curves or contact the factory for the appropriate derating. (ii) 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). Pin Descriptions +Vin: The positive input supply for the module with respect to –Vin. When powering the module from a –48-V telecom central office supply, this input is connected to the primary system ground. –Vin: The negative input supply for the module, and the 0-VDC reference for the ‘Remote On/Off’ and ‘±Vo Adjust’ control inputs. When the module is powered from a +48-V supply, this input is connected to the input source return. Remote On/Off: This is an open-collector (open-drain) negative logic input that enables the module output. The input is referenced to –Vin. Applying a low-level ground signal to this pin disables the module’s outputs. A high impedance enables the module’s outputs. If not used the pin should be left unconnected. Vo1: The positive regulated power output voltage, which is referenced to the COM node. Vo2: The negative regulated power output voltage, which is referenced to the COM node. COM: The secondary return reference for the module’s two regulated output voltages. It is dc isolated from the +Vin and –Vin input supply pins. ±Vo Adjust: Using a single resistor, this pin allows the module’s complementary output voltages to be adjusted higher or lower than their preset value. If not used, this pin should be left open circuit. Consult the related application note for further information. For technical support or further information,visit http://power.ti.com PT4310 Series —48V 6-W Low-Profile Dual-Output Isolated DC/DC Converter Specifications SLTS146B - MARCH 2001 - REVISED MAY 2004 (Unless otherwise stated, Ta =25°C, V in =53 V, Cout =0 µF, and Io 1 = Io2 =Io typ) Characteristic Symbol Ouput Power Po(tot) Output Current Io1, Io2 Conditions — (1) Io1 +Io2 (1) Input Voltage Range Set Point Voltage PT4310 Series Typ Min Vin Over Vin range (any one output) Max Units — 6 W 0.6 0.25 0.125 1 0.45 0.125 A PT4311 ( ±5 V) PT4313 (±12 V) PT4314 (±24 V) 0.2 0.05 0.02 PT4311 PT4313 PT4314 0.4 0.1 0.04 38 — — — — 1.2 0.5 0.25 75 PT4311 PT4313 PT4314 PT4311 PT4313 PT4314 5.05 12 24 ±0.5 ±1 ±1 ±25 5.15 12.15 24.72 — — — ±40 Over Vin range (sum-total from both outputs) Over Io range Vo1, Vo2 (1) (2) (2) (2) Temperature Variation Regtemp –40 >Ta > +85°C Line Regulation Regline Over Vin range 4.95 11.85 23.28 — — — — Load Regulation Regload Iox =0.6 A, 0.2 A ≤Ioy≤ 0.6 A PT4311 Iox =0.25 A, 0.05 A ≤Ioy≤ 0.25 A PT4313 Iox =0.125 A, 0.02 A ≤Ioy≤ 0.125 A PT4314 Over Vin and load range PT4311, PT4314 –40°C >Ta > +85°C PT4313 Io1 =Io2 = 0 PT4311 PT4313 PT4314 PT4311 PT4313 PT4314 20 MHz bandwidth PT4311 PT4313, PT4314 — — — — — — — — — — — — — 100 250 275 ±5 ±4 5.4 12.7 24.8 82 85 82 50 90 150 350 500 — — 5.9 17 29 — — — 100 150 Total Output Voltage Variation ∆Votot No-load Output Voltage Vo(no-load) Efficiency η Vo Ripple (pk-pk) Vr Transient Response ttr 20% ≤ Ioy≤ 75% of Iotyp, 25%load step Iox — 250 — ∆Vtr Vox over/undershoot Output Voltage Adjust Range Current Limit Threshold ∆±Vo adj ILim Short Circuit Current Isc Inrush Current Iir tir ƒo UVLO Both outputs adjusted simulatenously Over Vin range, PT4311, PT4313 ∆Vo =10%Vonom PT4314 PT4311, PT4313 PT4314 On start-up — — — — — — — — — — 400 — ±75 ±200 ±500 5 2.5 0.4 1 0.25 0.5 1 — 36 — — — — — — — — — — 520 — 5 –0.1 — — — 0 0 0 1500 — 10 — — –0.2 10 1 — — — — 1100 — Open (3) +1 – — — 120 (4) 47 (4) 20 (4) — — — Switching Frequency Under-Voltage Lockout Remote On/Off (Pin 11) Input High Voltage Input Low Voltage Input Low Cunrrent Standby Input Current Internal Input Capacitance External Output Capacitance VIH VIL IIL Iin standby Cin Cout Isolation Voltage Capacitance Resistance PT4311 PT4313 PT4314 Over Vin range Referenced to –Vin (pin 17) pins 11 & 17 connected Sum-total capacitance, connected from both outputs to COM (pin 2) Input - output PT4311 PT4313 PT4314 A V V %V mV mV %Vo V % mVpp µs mV %Vo A A A ms kHz V V mA mA µF µF V pF MΩ Notes: (1) Io2 and Vo2 indicates the magnitudes of the negative output parameters. Parameters within vertical brackets are quoted absolute. (2) The DC/DC converter will operate at no load with reduced specifications. See “No-load Output Voltage” specification. (3) The Remote On/Off (pin 11) has an internal pull-up. If the pin is left open the module will operate when input power is applied. Refer to the application notes for interface considerations. (4) Output capacitors are not required for proper operation. If added, Oscon® or tantalum types are recommended for operation below 0°C ambient. For technical support or further information, visit http://power.ti.com Typical Characteristics PT4310 Series —48V 6-W Low-Profile Dual-Output Isolated DC/DC Converter SLTS146B - MARCH 2001 - REVISED MAY 2004 PT4311 (±5V) Characteristic Data (See Note A) PT4313 (±12V) Characteristic Data Efficiency vs. Total Output Current ( Io 1 + |Io2| ) Efficiency vs. Total Output Current ( Io1 + |Io2| ) 90 90 80 VIN 38V 53V 75V 70 Efficiency - % Efficiency - % 80 VIN 38V 53V 75V 70 60 60 50 50 0.2 0.4 0.6 0.8 1 0 1.2 0.1 0.2 0.3 0.4 0.5 Io1 + Io2 (A) Io1 + Io2 (A) Output Ripple vs. Load ( Io1 or |Io 2| ) Output Ripple vs. Load ( Io1 or |Io2| ) 100 120 100 80 VIN 60 38V 53V 75V 40 VIN 80 Ripple - mV Ripple - mV (See Note A) 38V 53V 75V 60 40 20 20 0 0 0 0.2 0.4 0.6 0.8 1 0 0.1 0.2 Io1 : Io2 (A) 0.4 0.5 Power Dissipation vs. Total Output Current ( Io 1 + |Io2| ) Power Dissipation vs Output Current ( Io1 + |Io2| ) 2 1.6 1.5 1.2 75V 53V 38V 0.8 VIN Pd - Watts VIN Pd - Watts 0.3 Io1 : Io2 (A) 75V 53V 38V 1 0.5 0.4 0 0.0 0.2 0.4 0.6 0.8 1 0 1.2 0.1 0.2 0.3 0.4 0.5 Io1 + Io2 (A) Io1 + Io2 (A) Temperature Drift; |Io2| =0.1A (See Note B) Temperature Drift; |Io 2| =0.2A (See Note B) 100 50 50 Io1 (A) 0.2 0.4 0.6 0.8 1.0 0 Io1 (A) ∆Vo1 (mV) ∆Vo1 (mV) 25 0.4 0.3 0.2 0.1 0 -50 -25 -100 -50 -150 -50 -25 0 25 Ta (°C) 50 75 100 -50 -25 0 25 50 75 100 Ta (°C) 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: Drift with temperature is normalized to the static output voltage measured at 25°C. For technical support or further information,visit http://power.ti.com Typcial Characteristics PT4310 Series —48V 6-W Low-Profile Dual-Output Isolated DC/DC Converter SLTS146B - MARCH 2001 - REVISED MAY 2004 PT4311 (±5 V) Characteristic Data (See Note A) PT4313 (±12 V) Characteristic Data (See Note A) Load Regulation, Vox vs Io x with Ioy =0.2 A & VIN =53 V Load Regulation, Vox vs Iox with Ioy =0.05 A & VIN =53 V 4.0% 2.0% Vo 1 / Io 1 Vo 2 / Io 2 0.0% -2.0% Load Regulation ∆Vout (%) Load Regulation ∆Vo (%) 4.0% 2.0% Vo 1 / Io 1 Vo 2 / Io 2 0.0% -2.0% -4.0% 0 0.2 0.4 0.6 0.8 1 1.2 -4.0% Io1 : Io2 (A) 0 0.1 0.2 0.3 0.4 0.5 Cross Regulation, Vox vs Ioy with Io x =0.2 A & VIN =53 V Cross Regulation, Vox vs Ioy with Io x =0.05 A & V IN =53 V 1.0% 1.0% 0.5% 0.5% Vo 1 / Io 2 Vo 2 / Io 1 0.0% -0.5% ∆Vout (%) Cross Regulation ∆Vout (%) Io1 : Io2 (A) Vo 1 / Io 2 Vo 2 / Io 1 0.0% -0.5% -1.0% -1.0% 0 0.2 0.4 0.6 0.8 1 1.2 0 0.1 Io1 : Io2 (A) (See Note C) 0.4 0.5 PT4313 Safe Operating Area Curves Io 1 =0 to 1 A, |Io2| =0.2 A, V IN =38–75 V (See Note C) Io1 =0 to 0.25 A, |Io 2|=0.25 A, V IN =38–75 V 90 90.0 80 80.0 70 Airflow 60 200LFM 120LFM Nat conv 50 40 Ambient Temperature (°C) Ambient Temperature (°C) 0.3 Io1 : Io2 (A) PT4311 Safe Operating Area Curves 30 70.0 Airflow 60.0 60LFM Nat conv 50.0 40.0 30.0 20 0 0.2 0.4 0.6 0.8 20.0 0.00 1 0.05 Io1 (A) 0.10 0.15 0.20 0.25 Io1 (A) PT4311; Io1 =0 to 0.6 A, |Io2| =0.6 A PT4313; Io1 =0 to 0.45 A, |Io2| =0.05 A 90 90.0 80 80.0 70 Airflow 60 200LFM 120LFM Nat conv 50 40 30 Ambient Temperature (°C) Ambient Temperature (°C) 0.2 70.0 Airflow 200LFM 120LFM 60LFM Nat conv 60.0 50.0 40.0 30.0 20 20.0 0 0.1 0.2 0.3 0.4 0.5 Io1 (A) 0.6 0.0 0.1 0.2 0.3 0.4 Io1 (A) Note A: The above characteristic data has been developed from actual products tested at 25°C and Vin =53V. This data is considered typical data for the converter. Note C: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures. For technical support or further information, visit http://power.ti.com Typcial Characteristics PT4310 Series —48V 6-W Low-Profile Dual-Output Isolated DC/DC Converter SLTS146B - MARCH 2001 - REVISED MAY 2004 PT4314 (±24 V) Characteristic Data (See Note A) PT 4314 Safe Operating Area Curves (See Note C) Io1 = |Io2| from 0 to 125 mA, VIN =53 V Load Regulation, Vo1 vs Io1 with |Io 2| =0.02 A 90 90 Efficiency - % VIN 36 V 53 V 75 V 70 60 Ambient Temperature (°C) 80 80 Airflow 70 200LFM 120LFM 60LFM Nat conv 60 50 40 30 50 20 0 25 50 75 100 125 0 Io1 = |Io2| (mA) 25 50 75 100 125 Io1 = |Io2| (mA) Power Dissipation vs Output Current ( Io1 = |Io2| ) 2.5 2 Pd - Watts VIN 1.5 36 V 53 V 75 V 1 0.5 0 0 25 50 75 100 125 Io1 = |Io2| (mA) Load Regulation, Vox vs Io x with Io y =0.02 A & V IN=53 V Load Regulation ∆Vo (%) 2% 1% Vo 1 / Io 1 Vo 2 / Io 2 0% -1% -2% 0 25 50 75 100 125 Io1 : Io2 (mA) Cross Regulation, Vox vs Ioy with Iox =0.02 A & VIN =53 V Load Regulation ∆Vo (%) 1.0% 0.5% Vo 1 / Io 2 Vo 2 / Io 1 0.0% -0.5% -1.0% 0 25 50 75 100 125 Io1 : Io2 (mA) Note A: The above characteristic data has been developed from actual products tested at 25°C and Vin =53V. This data is considered typical data for the converter. Note C: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures. For technical support or further information,visit http://power.ti.com Application Notes PT4310 Series Adjusting the Output Voltage of the PT4310 Series of Isolated DC/DC Converters The PT4310 is a series of 6-watt isolated dual-output DC/DC converters. The PT4310 series is functionally similar and pin-compatible with the former PT4300 series, but the adjustment of the output voltages is different 1. The ±Vo output voltages of the PT4310 series may be adjusted higher or lower than the factory trimmed value. The adjustment method uses a single external resistor to adjust the magnitude of both output voltages by as much as ±5%. When adjusting the output voltages to a lower value, an external bias voltage, referenced to the –V in (primary), is also required. 2 Figure 1-1 +V IN 18 PT4310 (R3) 31.6kΩ 17 (R1) Adj Down (VR1), 5.1V MM3Z5V1 –V IN Adjust Down: An increase in the ±Vout output voltages is obtained by adding a resistor, (R1), between Vo Adjust (pin 12) and a +5 VDC external voltage source. The voltage source must be referenced to –Vin (pin 17). A simple external voltage source may be implemented by adding the components (R3) and (VR1) in Figure 1-1. Refer to Table 1-1 for the value of the external adjust resistors, R2, or (R1) required to adjust each model of the PT4310 series, up or down respectively by the stated percentage. See Figure 1-1 for the placement of (R1), R2, and other components. Table 1-1 DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES Series Pt # PT4311 PT4313 Vo (nom) ±5 V ±12 V (Io 1+|Io 2|)max 4 1.2 A 0.5 A |±Vo|% Adjust PT4314 ±24 V 0.25 mA R2 Adjust Up (90.9 kΩ) (0 kΩ) (220 kΩ) –2.5% (750 kΩ) (511 kΩ) (950 kΩ) +2.5% 750 kΩ 511 kΩ 950 kΩ +5.0% 90.9 kΩ 0 kΩ 220 kΩ ±Vo Adjust 12 COM R2 =Black For technical support or further information, visit http://power.ti.com 2 3 Vo 2 (–) Note: (R3) and (VR1) are only required with (R1), for adjusting the output down. 2. The adjustment control input, Vo Adjust (pin 12) is referenced to –Vin (pin 17). 3. (R3) and (VR1) provide a +5 VDC external bias voltage that is required for (R1) to adjust the output voltages down. If the outputs are to be adjusted up, only the R2 is required. 4. The PT4310 series is rated for 6 watts total output. An increase in the output voltage will require a corresponding reduction in the maximum allowed total output current (Io1 +Io2) max in Table 1-1. The total current from both outputs must comply with the following equation:6 Va Adc or (Io1 +Io2)max, whichever is less. 0.0% R1 = (Blue) 1 Notes 1. In most stand-alone applications the PT4310 series is a direct substitute for the PT4300 series. However, the method of output voltage adjustment differs between the two series. For existing applications that use a PT4300 part, a modification to the circuit will be necessary if the output voltage is required to be adjusted to a value other than the pre-trimmed factory setting. Io1 +Io2 = –5.0% -Vin Remote On/Off 11 Figure 1-1 gives a suggested schematic for the PT4310 output voltage adjustment. The components (R3) and (VR1) are only required with (R1). 3 Adjust Up: Add a resistor, R2, between Vo Adjust (pin 12) and –Vin (pin 17). Vo 1 (+) +Vin Where, Va = the new (adjusted) output voltage. Application Notes PT4310 Series Using the Remote On/Off Function on the PT4310 Isolated Dual Output DC/DC Converters For applications requiring output voltage On/Off control, the PT4310 DC/DC converter series incorporates a “Remote On/Off” control (pin 11). This feature can be used when there is a requirement for the module to be switched off without removing the applied input source voltage. Table 2-2; UVLO Thresholds The converter operates normally with Pin 11 open-circuit, and produces a regulated output voltage when a valid source voltage is applied to +Vin (pin 18), with respect to –Vin (pin 17). When a low-level 1 ground signal is applied to pin 11, the converter output will be turned off. Figure 2-1 Figure 2-1 shows an application schematic, which details the typical use of the Remote On/Off function. Note the discrete transistor (Q1). The control pin has its own internal pull-up, and must be controlled with an opencollector or open-drain device (See notes 2 & 3). Table 2-1 gives the input requirements. Series Vin Range UVLO Threshold PT4310 38 – 75 V 36 ±2 V + V in 18 -V in 17 Remote On/Off 11 ±Vo Vo 2 (–) Adjust 12 1 + Vo 2 3 -V o Q1 BSS138 1 =OFF Note 1 Vdd R1 10k D1 1N4148 # U1a # Note 1 Min Typ –0.1 V 5V 3 — 1V — Open-Circuit 2 Vo/c [Open-Circuit] — — 10 V Iin [pin 11 at –Vin] — –200 µA — Enable COM -Vin Note 1 Table 2-1; Remote On/Off Control Requirements 1 Disable Vo 1 (+) +Vin PT4310 When placed in the “Off” state, the standby current drawn from the input source is typically reduced to less than 1 mA. Parameter 4 or similar low-leakage PIN diode Max Notes: 1. The Remote On/Off control uses –Vin (pin 17) as its ground reference. All voltages specified are with respect to –Vin. 2. Use an open-collector device (preferably a discrete transistor) for the Remote On/Off input. Do not connect a pull-up resistor directly to pin 11. 3. The Remote On/Off pin may be controlled with devices that have a totem-pole output providing that a blocking diode is used. The blocking diode is required to prevent current from being injected into On/Off control pin. Note: For TTL devices a pull-up may be required on the cathode side of the blocking diode. This is to guarantee a minimum enable voltage at pin 11 (See Figure 2-1). Turn-On Time: In the circuit of Figure 2-1, turning Q1 on applies a low-voltage to pin 11 and disables the converter output. Correspondingly, turning Q1 off allows the converter to power up and produce a regulated output voltage within 50 ms. Although the rise-time of the output is short (<1ms), the delay time will vary depending upon the input voltage and the module’s internal timing. Figure 2-2 shows response of the +5-V output from the PT4311 (±5 V), following the turn-off of Q1 at time t =0. The waveform was measured with a 48 Vdc input voltage, and 0.25-Adc resistive load at both the positive and negative outputs. Figure 2-2 VO (2V/Div) 4. The PT4310 converters incorporate an “Under-Voltage Lockout” (UVLO). The UVLO will keep the module off when the input voltage to the converter is low, regardless of the state of the Remote On/Off control. Table 2-2 gives the UVLO input voltage thresholds. delay time 0 5 10 15 20 25 30 time (milli-secs) For technical support or further information,visit http://power.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. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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