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PTB48511B Datasheet(PDF) 3 Page - Texas Instruments |
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PTB48511B Datasheet(HTML) 3 Page - Texas Instruments |
3 / 13 page For technical support and further information visit http://power.ti.com PTB48510A, PTB48511A Dual Complementary-Output DC/DC Converter for DSL Specifications (Unless otherwise stated, Ta =25°C, Vin =48 V, Cin =0 µF, ±Co =0 µF, |+Io | = |–Io |, and |±Io | =0.5 |±Io |max) PTB4851xA Characteristic Symbol Conditions Min Typ Max Units Output Power Po Total output power from ±Vo 0— 65 (1) W Output Current |±Io | Over Vin range, |+Io | – |–Io | ≤ 0.1 A 0 — 6.5 (2) A Output Load Imbalance |+Io | – |–Io ||+Io | ≥0.1 A, |–Io | ≥ 0.1 A 0 — 1 (3) A Output Voltage |±Vo| Inlcudes set-point, line, |+Io | – |–Io | ≤ 0.1 A 4.75 (2) 5 5.25 (2) V –40 ≤Ta ≤+85°C Temperature Variation ∆Regtemp –40 ≤Ta≤ +85°C, |±Io | =0.1 A +Vo —±1 — %Vo –Vo —±1 — Line Regulation ∆Regline Over Vin range, balanced load ±Vo — ±0.1 ±0.4 %Vo Load Regulation ∆Regload Over ±Io range, balanced load ±Vo — ±0.2 ±0.4 %Vo Efficiency η —86 — % Vo Ripple (pk-pk) ±Vr 20 MHz bandwidth, — 20 30 (4) mVpp Co =10 µF tantalum capacitor Transient Response ttr 0.1 A/µs load step, 50% to 75% ±Iomax — 30 — µs ∆Vtr |±Vo|over/undershoot — ±1.0 — %Vo Over Current Threshold Iotrip Vin =36 V 6.8 7.5 10 A reset followed by auto-recovery Over-Voltage Threshold |±Vo| trip Outputs latched off (5) PTB48510 N/A — N/A V PTB48511 5.9 — 7 Short Circuit Current Continuous over-current trip, |±Io |pk — 12.5 — A |+Io | = |–Io | Duty — 10 — % Output Voltage Adjust Range |±Vo|adj |+Vo | and |–Vo | adjust simulataneously 3.5 — 5.5 V Switching Frequency ƒs Over Vin and Io ranges 440 470 (6) 500 kHz Under-Voltage Lockout Vinon Vin increasing — 33 — V Vinoff Vin decreasing — 32 — On/Off Enable (pin 3) Referenced to –Vin (pin 4) Input High Voltage VIH +3.6 — +75 (7) V Input Low Voltage VIL –0.2 — +0.8 Input Low Current IIL ——–1 mA Standby Input Current Iin standby pin 3 open circuit — 2 — mA Start-up Time ton |±Io | =1 A, |±Vo | rising 0 to 0.95 |±Vo | typ 6 1022ms Internal Input Capacitance Cin —3 —µF External Output Capacitance ±Co Capacitance from either output to COM (pin 6) 0 — 5,000 (8) µF Reliability MTBF Per Bellcore TR-332 PTB48510A 2.7 — — 106 Hrs 50% stress, Ta =40°C, gnd benign PTB48511A 2.5 — — 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 +Vo is balanced to within ±0.1 A of that flowing into –Vo. (3) A load imbalance is the difference in current flowing from +Vo 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 +Vo (pin 5) or –Vo (pin 8), to COM (pin 6). (5) If the over-voltage threshold is exceeded by either regulated output the module will shut down, turning both outputs off. This is a latched condition, which can only by reset by removing and then re-applying the module’s input power. (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 +Vin. The open-circuit voltage is 5 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. SLTS219C - FEBRUARY 2004 - REVISED OCTOBER 2004 |
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