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TNY264P Datasheet(PDF) 2 Page - Power Integrations, Inc. |
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TNY264P Datasheet(HTML) 2 Page - Power Integrations, Inc. |
2 / 24 page 2 G4/05 TNY263-268 Figure 2. Functional Block Diagram. Figure 3. Pin Configuration. Pin Functional Description DRAIN (D) Pin: Power MOSFET drain connection. Provides internal operating current for both start-up and steady-state operation. BYPASS (BP) Pin: Connection point for a 0.1 µF external bypass capacitor for the internally generated 5.8 V supply. ENABLE/UNDER-VOLTAGE (EN/UV) Pin: This pin has dual functions: enable input and line under-voltage sense. During normal operation, switching of the power MOSFET is controlled by this pin. MOSFET switching is terminated when a current greater than 240 µA is drawn from this pin. This pin also senses line under-voltage conditions through an external resistor connected to the DC line voltage. If there is no external resistor connected to this pin, TinySwitch-II detects its absence and disables the line under- voltage function. SOURCE (S) Pin: Control circuit common, internally connected to output MOSFET source. SOURCE (HV RTN) Pin: Output MOSFET source connection for high voltage return. PI-2643-030701 CLOCK OSCILLATOR 5.8 V 4.8 V SOURCE (S) S R Q DCMAX BYPASS (BP) + - VILIMIT FAULT PRESENT CURRENT LIMIT COMPARATOR ENABLE LEADING EDGE BLANKING THERMAL SHUTDOWN + - DRAIN (D) REGULATOR 5.8 V BYPASS PIN UNDER-VOLTAGE 1.0 V + VT ENABLE/ UNDER- VOLTAGE (EN/UV) Q 240 µA 50 µA LINE UNDER-VOLTAGE RESET AUTO- RESTART COUNTER JITTER 1.0 V 6.3 V CURRENT LIMIT STATE MACHINE PI-2685-101600 EN/UV D S S S (HV RTN) S (HV RTN) BP P Package (DIP-8B) G Package (SMD-8B) 8 5 7 1 4 2 3 |
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