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TPS68000DBT Fiches technique(PDF) 7 Page - Texas Instruments |
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TPS68000DBT Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 13 page www.ti.com TPS68000 SLVS524 – OCTOBER 2005 PIN ASSIGNMENTS (continued) Terminal Functions (continued) TERMINAL I/O DESCRIPTION NAME NO. PH 4 I Phase delay programming input. A voltage between 0 V and 2 V applied to that pin programs the phase delay of the operating frequency compared to the synchronizing frequency. Applying V5 (5.0 V) programs the device as a master regarding the main oscillator frequency (see SYNC). The voltage applied to that pin is also used to determine the phase delay in a distributed dimming configuration SA 28 Source connection of switch A SC 18 Source connection of switch C SET 2 I Operating frequency programming input. A resistor connected to this pin programs the internal operating frequency. STC 3 I Startup capacitor. A capacitor connected to that pin determines the the time the device waits in voltage regulation for the lamp to strike. SYNC 1 I/O Synchronization input or operating frequency output. If the device is configured as master (see PH) the pin is used to provide the synchronization frequency for the slaves. Otherwise the device works as slave and uses the applied frequency at that pin for synchronizing the operating frequency. V5 23 O Input/Output of the internal 5 V regulator for Gate drive supply. A capacitor must be connected to that pin to decouple switching noise caused by the gate drivers. V5A 26 O Supply input for the gate driver of the high-side switch A. A capacitor must be connected to that pin to supply the gate driver during switching (bootstrap). V5C 20 O Supply input for the gate driver of the high side switch C. A capacitor must be connected to that pin to supply the gate driver during switching (bootstrap). VA- 10 I Voltage amplifier negative input. This input is used to connect the compensation capacitor for compensating the voltage loop. VAO 9 O Voltage amplifier output. This is the output for the voltage amplifier. It is used to connect the compensation capacitor for the voltage loop. VCC 24 I Device supply voltage VREF 30 O Voltage reference. Output of the internal 3.3-V reference for use with all the analog control inputs. VSEN 11 I Voltage sense. Measuring input for the lamp voltage. This voltage is used for lamp voltage regulation (open lamp regulation) and overvoltage protection. Sensed AC voltages can be applied directly. They are rectified internally. 7 |
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Description similaire - TPS68000DBT |
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