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PTB48580AAZ Datasheet(PDF) 5 Page - Texas Instruments |
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PTB48580AAZ Datasheet(HTML) 5 Page - Texas Instruments |
5 / 13 page For technical support and further information visit http://power.ti.com PTB48580B Dual Complementary-Output DC/DC Converter for DSL SLTS240 DECEMBER 2004 Specifications (Unless otherwise stated, T A =25°C, VI =48 V, CI =0 µF, ±CO =0 µF, |+IO | = |–IO |, and |±IO | =0.5 |±IO |max) PTB48580B Characteristic Symbol Conditions Min Typ Max Units Output Power P O Total output power from ±V O 0— 30 (1) W Output Current |±I O | Over VI range, |+IO | – |–IO | ≤ 0.1 A 0 — 1.25 (2) A Output Load Imbalance |+I O | – |–IO ||+IO | ≥0.1 A, |–IO | ≥ 0.1 A 0 — 0.5 (3) A Output Voltage |±V O | Inlcudes set-point, line, |+I O | – |–IO | ≤ 0.1 A 11.6 (2) 12 12.4 (2) V –40 ≤T A ≤+85°C Temperature Variation ∆Reg temp –40 ≤T A ≤ +85°C, |±IO | =0.1 A ±V O —±1 —%V O Line Regulation ∆Reg line Over VI range, balanced load ±VO — ±0.1 ±0.5 %VO Load Regulation ∆Reg load Over ±I O range, balanced load ±V O — ±0.1 ±1 %V O Efficiency η PO =PO max — 88 — % V o Ripple (pk-pk) ±Vr 20 MHz bandwidth, — 50 100 (4) mV pp CO =10 µF tantalum capacitor Transient Response tS 0.1 A/µs load step, 50% to 75% ±IO max — 30 — µs ∆V O pk |±V O | over/undershoot — ±1 — %VO Over Current Threshold IOtrip VI =36 V 1.4 1.9 2.4 A reset followed by auto-recovery Short Circuit Current Continuous over-current trip, |±I O |PK —3 —A |+I O | = |–IO | Duty — 10 — % Output Voltage Adjust Range |±V O | adj |+V O | and |–VO | adjust simulataneously 6.5 — 13.4 (5) V Switching Frequency ƒ S Over V I and IO ranges 440 480 (6) 520 kHz Under-Voltage Lockout VIon VI increasing — 33 — V VIoff VI decreasing — 32 — On/Off Enable (pin 3) Referenced to –V I (pin 4) Input High Voltage VIH +3.6 — +75 (7) V Input Low Voltage VIL –0.2 — +0.8 Input Low Current I IL ——–1 mA Standby Input Current II standby pin 3 open circuit — 2 — mA Start-up Time t ON |±I O | =1 A, |±VO | rising 0 to 0.95 |±VO | TYP —10 —ms Internal Input Capacitance CI —2 —µF External Output Capacitance C O Capacitance from either output to COM (pin 6) 0 — 1,500 (8) µF Reliability MTBF Per Telcordia SR-332 2.8 — — 106 Hrs 50% stress, TA =40°C, ground benign Notes: (1) See Safe Operating Area curves or contact the factory for the appropriate derating. (2) Under balanced load conditions, load current flowing out of +V O is balanced to within ±0.1 A of that flowing into –VO . (3) A load imbalance is the difference in current flowing from +V O to –VO . The module can operate with a higher imbalance but with reduced specifications. (4) Output voltage ripple is measured with a 10-µF tantalum capacitor connected from +V O (pin 5) or –VO (pin 8), to COM (pin 6). (5) When the output voltage is adjusted higher than the nominal output voltage the load current must not exceed the module’s maximum power rating. (6) This is the free-running frequency. The module can be made to synchronize with the PTB48500 when both modules are used together in a system. (7) The On/Off Enable (pin 3) has an internal pull-up and may be controlled with an open-collector (or open-drain) transistor. The input is diode protected and may be connected to +V I . The open-circuit voltage is 7 V max. If it is left open circuit the converter will operate when input power is applied. (8) Electrolytic capacitors with very low equivalent series resistance (ESR) may induce instability when used on the output. Consult the factory before using capacitors with organic, or polymer-aluminum type electrolytes. Not Recommended for New Designs |
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