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TNY376PN Datasheet(PDF) 2 Page - Power Integrations, Inc. |
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TNY376PN Datasheet(HTML) 2 Page - Power Integrations, Inc. |
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2 / 20 page  Rev. A 05/07 2 TNY375-380 www.powerint.com Pin Functional Description DRAIN (D) Pin: This pin is the power MOSFET drain connection. It provides internal operating current for both start-up and steady-state operation. BYPASS/MULTI-FUNCTION (BP/M) Pin: This pin has multiple functions: It is the connection point for an external bypass capacitor for the internally generated 5.85 V supply. It is a mode selector for the current limit value, depending on the value of the capacitance added. Use of a 0.1 mF capacitor results in the standard current limit value. Use of a 1 mF capacitor results in the current limit being reduced to that of the next smaller device size. Use of a 10 mF capacitor results in the current limit being increased to that of the next larger device. It provides a shutdown function. When the current into the bypass pin exceeds 7 mA, the device latches off until the BP/M voltage drops below 4.9 V, during a power down or when a line undervoltage is detected. This can be used to provide an output overvoltage function with a Zener diode connected from the BP/M pin to a bias winding supply. 1. 2. 3. ENABLE/UNDERVOLTAGE (EN/UV) Pin: This pin has dual functions: enable input and line undervoltage sense. During normal operation, switching of the power MOSFET is controlled by this pin. MOSFET switching is terminated when a current greater than a threshold current is drawn from this pin. Switching resumes when the current being PI-4550-121406 CLOCK OSCILLATOR 5.85 V 4.9 V SOURCE (S) S R Q DCMAX BYPASS/ MULTI-FUNCTION (BP/M) + - VI LIMIT FAULT PRESENT CURRENT LIMIT COMPARATOR ENABLE LEADING EDGE BLANKING THERMAL SHUTDOWN + - DRAIN (D) REGULATOR 5.85 V BYPASS PIN UNDER-VOLTAGE 1.0 V + VT ENABLE/ UNDER- VOLTAGE (EN/UV) Q 115 mA 25 mA LINE UNDER-VOLTAGE RESET AUTO- RESTART COUNTER JITTER 2X 1.0 V 6.4 V BYPASS CAPACITOR SELECT AND CURRENT LIMIT STATE MACHINE OVP LATCH RESET Figure 2 Functional Block Diagram. PI-4348-032806 D S BP/M S S EN/UV P Package (DIP-8C) 8 5 7 1 4 2 S 6 Figure 3. Pin Configuration. |
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