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PT4711C Datasheet(PDF) 2 Page - Texas Instruments |
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PT4711C Datasheet(HTML) 2 Page - Texas Instruments |
2 / 13 page For technical support and further information, visit http://power.ti.com Pin Function 1+Vin 2–Vin 3 EN 2 4 EN 1 5 Do Not Connect 6 Do Not Connect 7 Do Not Connect On/Off Enable Logic Pin Descriptions Pin 3 Pin 4 Output Status ×1 Off 10 On 0× Off Notes: Logic 1 =Open collector Logic 0 = –Vin (pin 2) potential For positive Enable function, connect pin 4 to pin 2 and use pin 3. For negative Enable function, leave pin 3 open and use pin 4. +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 EN 1, and EN 2 inputs. When powering the module from a +48-V supply, this input is connected to the input source return. EN 1: The negative logic input that activates the module output. This pin must be connected to –Vin to enable the module’s outputs. A high impedance disables the module’s outputs. EN 2: The positive logic input that activates the module output. If not used, this pin should be left open circuit. Connecting this input to –Vin disables the module’s outputs. +Vo 1: This is the positive DC output voltage with respect to –Vo1. The output voltage produced across ±Vo1 is electrically isolated from ±Vin and indepen- dently regulated from that produced at ±Vo2. If the +Vo1 node is connected to the secondary ground, a negative output voltage will be produced at –Vo1. –Vo 1: The negative output supply voltage with respect to +Vo1. If this node is connected to the secondary ground, a positive voltage is produced at +Vo1. +Vo 2: This is the positive DC output voltage with respect to –Vo2. The output voltage produced across ±Vo2 is electrically isolated from ±Vin and indepen- dently regulated from that produced at ±Vo1. If +Vo2 node is connected to the secondary ground, a nega- tive output voltage will be produced at –Vo2. –Vo 2: The negative output supply voltage with respect to +Vo2. If this node is connected to the secondary ground, a positive voltage is produced at +Vo2. ±Vo1 Adjust: Using a single resistor, this pin allows the output voltage produced at ±Vo1 to be adjusted higher or lower by up to 10%. If not used this pin should be left open circuit. ±Vo2 Adjust: Using a single resistor, this pin allows the output voltage produced at ±Vo2 to be adjusted higher or lower by up to 10%. If not used this pin should be left open circuit. Pin Function 8 Pin Not Present 9 Pin Not Present 10 Pin Not Present 11 Pin Not Present 12 Pin Not Present 13 Pin Not Present 14 +Vo1 Pin Configuration Note: Shaded functions indicates those pins that are at primary-side potential. All other pins are referenced to the secondary. Pin Function 15 Not Connected 16 –Vo1 17 Vo1 Adjust 18 +Vo2 19 Not Connected 20 –Vo2 21 Vo2 Adjust PT4711—48V 45-W Dual-Output Isolated DC/DC Converter SLTS225 APRIL 2004 |
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