PT4242

PT4240 TI | Alldatasheet

Document overview

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Technical content

Features

• 10W Output Power
• Input Voltage: 18V to 36V
• Output Voltages: 1.2V to 13.2V
• 1500 VDC Isolation
• Temp Range: –40°C to +85°C
• Remote On/Off Control
• Undervoltage Lockout
• Output Current Limit

Ordering Information

PT4241/GA8 =1.8V/3A (5.4W) PT4242/GA8 =3.3V/3A PT4243/GA8 =5.0V/2A PT4244/GA8 =12.0V/0.85A PT4245/GA8 =2.5V/3A (7.5W) PT4246/GA8 =1.5V/3A (4.5W) † Adjustable to 1.2V

Description

The PT4240 power modules are a series of DC/DC converters housed in an ultra-low profile (8mm) solderable copper case. The series includes a num- ber of preset output voltages ranging from 1.3V † up to 12V, all fully approved for Telecom use. They may also be used in many other applications that require input-output isolation over an extended temperature range. The modules are an ideal choice for low-power digital and analog circuits, including DSPs and microcontrollers. The flexibility of input-output isolation also allows the output to be configured for negative voltage operation. The PT4240 series is made available in both horizontal and vertical pin con- figurations, including surface mount.

• Short-Circuit Protection
• Low-Profile Package (8mm)
• Space Saving Package
• Solderable Copper Case
• Safety Agency Approvals: UL 60950 CSA 22.2 60950 PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code Vertical N (EPE) Horizontal A (EPF) SMD C (EPG) (Reference the applicable package code draw- ing for the dimensions and PC board layout) PT4240 Series 10-W Low-Profile 24V-Input Isolated DC/DC Converter SLTS145A (Revised 1/14/2002) PT4240 +Vout -Vout +Vin -Vin Remote On/Off V o(ad j) 5 8, 9 6, 7 L O A D +V in -Vin +V out -Vout Pin-Out Information Pin Function

1 Remote On/Off *

2 Do not connect

3– V in

4 Do not connect

10 Vout Adj *

• For further information, see application notes.

For technical support and more information, see inside back cover or visit www.ti.com PT4240 Series 10-W Low-Profile 24V-Input Isolated DC/DC Converter Specifications (Unless otherwise stated, Ta =25°C, Vin =24V, Cin =0µF, Cout =0µF, and Io =Iomax) PT4240 SERIES Characteristic Symbol Conditions Min Typ Max Units Output Current I o Over Vin range V o ≤ 3.3V 0.1 (1) —3 Input Voltage Range V in Over Io Range 18.0 24.0 36.0 VDC Set Point Voltage Tolerance V o t o l —± 1± 2% V o Temperature Variation Reg temp –40° ≤Ta ≤ +85°C, Io =Iomin — ±0.2 — %V o Line Regulation Reg line Over Vin range — ±1 — mV Load Regulation Reg load Over Io range — ±5 — mV Total Output Voltage Variation ∆Votot Includes set-point, line, load, — ±1.5 ±3 %V o–40° ≤Ta ≤ +85°C Efficiency η Vo = 12V — 86 — Vo = 5.0V — 84 — Vo = 3.3V — 80 — Vo = 2.5V — 77 — % Vo = 1.8V — 72 — Vo = 1.5V — 70 — Vo = 1.3V — 64 — Vo Ripple (pk-pk) V r 20MHz bandwidth V o ≤ 5.0V — 50 — mVppVo = 12V — 100 — Transient Response t tr 1A/µs load step, 50% to 100% Iomax — 75 — µs ∆Vtr Vo over/undershoot V o ≤ 5.0V — ±150 — mVVo = 12V — ±350 — Output Voltage Adjust V adj Vo ≥2.5V ±10 — — %V o Current Limit Threshold I lim Vin =18V, ∆Vo = –1% — 150 — %I omax Switching Frequency ƒ s Over Vin range 250 300 350 kHz Under-Voltage Lockout UVLO — 16 — V Remote On/Off (Pin 1) Referenced to –Vin (pin 3) Input High Voltage V IH 4.5 — Open (3) V Input Low Voltage V IL –0.2 — +0.8 Input Low Current I IL — –0.5 — mA Standby Input Current I in standby pins 1 & 3 connected — 1 — mA Internal Input Capacitance C in — 0.66 — µF External Output Capacitance C out Vo ≤ 5.0V 0 (5) — 1000 µF Vo = 12V 0 (5) — 330 Isolation Voltage Input–output/input–case 1500 — — V Capacitance Input to output — 1,100 — pF Resistance Input to output 10 — — M Ω Operating Temperature Range T a Over Vin range -40 — +85 (4) °C Storage Temperature T s — -40 — +125 °C Reliability MTBF Per Bellcore TR-332 4.7 — — 10 6 Hrs50% stress, Ta =40°C, ground benign Mechanical Shock — Per Mil-Std-883D, method 2002.3, — 500 — G’s 1mS, half-sine, mounted to a fixture Mechanical Vibration — Mil-Std-883D, Method 2007.2 — 20 (6) —G ’ s20-2000Hz, all case styles soldered to PC Weight — — — 20 — grams Flammability — Materials meet UL 94V-0 Notes: (1) The DC/DC converter will operate at no load with reduced specifications. (2) The maximum output current reduces the output power of the following devices to less than 10W:- (3) The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the converter will operate when input powe r is applied. The open-circuit voltage is typically 5V. Refer to the application notes for interface considerations. (4) See Safe Operating Area curves or contact the factory for the appropriate derating. (5) An output capacitor is not required for proper operation. (6) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package o utline drawing.

For technical support and more information, see inside back cover or visit www.ti.com Note A: All Characteristic data in the above graphs has been developed from actual products tested at 25°C. This data is considered typ ical data for the converter. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating t emperatures. PT4242, Vo =3.3VDC (See Note A) PT4240 Series 10-W Low-Profile 24V-Input Isolated DC/DC Converter Efficiency vs Output Current Output Ripple vs Output Current Power Dissipation vs Output Current Safe Operating Area @Vin =24V (Note B) PT4243, Vo =5.0VDC (See Note A) Efficiency vs Output Current Output Ripple vs Output Current Power Dissipation vs Output Current Safe Operating Area @Vin =24V (Note B) PT4244, Vo =12.0VDC (See Note A) Efficiency vs Output Current Output Ripple vs Output Current Power Dissipation vs Output Current Safe Operating Area @Vin =24V (Note B) 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 0.5 1.5 2.5 00 . 511 . 522 . 53 Iout (A) Pd - Watts 18.0V 24.0V 30.0V 36.0V VIN 00 . 511 . 522 . 53 Iout (A) Ripple - mV 18.0V 24.0V 30.0V 36.0V VIN 0 0.5 1 1.5 2 2.5 3 Iout (A) Efficiency - % 36.0V 30.0V 24.0V 18.0V VIN 0.5 1.5 2.5 0 0.4 0.8 1.2 1.6 2 Iout (A) Pd - Watts 36.0V 24.0V 30.0V 18.0V VIN 0 0.4 0.8 1.2 1.6 2 Iout (A) Ripple - mV 18.0V 24.0V 30.0V 36.0V VIN 0 0.4 0.8 1.2 1.6 2 Iout (A) Efficiency - % 36.0V 30.0V 24.0V 18.0V VIN 0.5 1.5 2.5 0 0.2 0.4 0.6 0.8 1 Iout (A) Pd - Watts 18.0V 24.0V 30.0V 36.0V VIN 100 120 0 0.2 0.4 0.6 0.8 1 Iout (A) Ripple - mV 18.0V 24.0V 30.0V 36.0V VIN 0 0.2 0.4 0.6 0.8 1 Iout (A) Efficiency - % 36.0V 30.0V 24.0V 18.0V VIN 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 Iout (A) Ambient Temperature (°C) Nat conv 60LFM 120LFM 200LFM Airflow

For technical support and more information, see inside back cover or visit www.ti.com Adjusting the Output Voltage of the 10W-Rated Excalibur™ Series of Isolated DC/DC Converters The factory pre-set output voltage of Power Trends’ 10W Excalibur series of isolated DC-DC converters may be adjusted over a narrow range. This is accomplished with the addition of a single external resistor. For the input voltage range specified in the data sheet, Table 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, R2 between pin 10 (Vo adjust), and pins 6 & 7 (–Vout). Adjust Down: Add a resistor (R1), between pin 10 (Vo adjust) and pins 8 & 9 (+Vout). Refer to Figure 1 and Table 2 for both the placement and value of the required resistor, (R1) or R2. The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. (R1) = 56.2 (V a – 1.225) – Rs kΩ Vo – Va Table 1 DC/DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # 24V Bus PT4247 PT4246 PT4241 PT4245 PT4242 PT4243 PT4244 48V Bus PT4227 PT4226 PT4221 PT4225 PT4222 PT4223 PT4224 Rated Current 3 3A 3A 3A 3A 3A 2A 0.85A Figure 1 PT4220/4240 +Vout -Vout +Vin -Vin Remote On/Off V o(adj) 5 8, 9 6, 7 10 L O A D +V in -Vin +V O –V O (R1) Adj Down Adjust Up R2 = 68.845 – Rs kΩ Va – Vo Where, V o = Original output voltage Va = Adjusted output voltage Rs = Internal resistance (Table 1) 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. 2. Never connect capacitors to Vo adjust. Any capacitance added to the Vo adjust control pin will affect the stability of the ISR. 3. The output power is limited to 10W. If the output voltage is increased, the maximum load current must be derated according to the following equation. Io(max) = 10 Va In any instance, the load current must not exceed the converter’s rated current (See Table 1). PT4220/4240 Series

For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued Table 2 DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES Series Pt # 24V Bus PT4247 PT4246 PT4241 PT4245 PT4242 PT4243 PT4244 48V Bus PT4227 PT4226 PT4221 PT4225 PT4222 PT4223 PT4224 Va(req’d) Va(req’d) R1 = (Blue) R2 = Black 1.2 (0.0)kΩ 1.25 (340.0)kΩ 1.3 1.35 340.0k Ω 1.4 0.0.0k Ω 1.45 (9.9)kΩ 1.5 1.55 1130.0k Ω 1.6 445.0k Ω 1.65 216.0k Ω 1.7 (23.9)kΩ 1.75 (347.0)kΩ 1.8 1.85 1130.0k Ω 1.9 445.0k Ω 1.95 216.0k Ω 2.25 (43.4)kΩ 2.3 (115.0)kΩ 2.35 (235.0)kΩ 2.4 (473.0)kΩ 2.45 (1190.0)kΩ 2.5 2.55 1190.0k Ω 2.6 501.0k Ω 2.65 272.0k Ω 2.7 157.0k Ω 2.75 88.4k Ω 2.95 (90.0)kΩ 3.0 (146.0)kΩ 3.05 (223.0)kΩ 3.1 (340.0)kΩ 3.15 (534.0)kΩ 3.2 (923.0)kΩ 3.25 (2090.0)kΩ 3.3 3.35 1190.0k Ω 3.4 501.0k Ω 3.45 272.0k Ω 3.5 157.0k Ω 3.55 88.4k Ω 3.6 42.5k Ω 3.65 9.7k Ω 4.5 (258.0)kΩ 4.6 (364.0)kΩ 4.7 (541.0)kΩ 4.8 (895.0)kΩ 4.9 (1960.0)kΩ 5.0 5.1 578.0k Ω 5.2 234.0k Ω 5.3 119.0k Ω 5.4 62.1k Ω 5.5 27.7k Ω 10.8 (399.0)kΩ 11.0 (499.0)kΩ 11.5 (1110.0)kΩ 12.0 12.5 87.8k Ω 13.0 18.9k Ω 13.2 7.5k Ω PT4220/4240 Series

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