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TNY285PG-TL Datasheet(PDF) 2 Page - Power Integrations, Inc. |
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TNY285PG-TL Datasheet(HTML) 2 Page - Power Integrations, Inc. |
2 / 26 page Rev. A 09/12 2 TNY284-290 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 μF capaci- tor results in the standard current limit value. Use of a 1 μF capacitor results in the current limit being reduced to that of the next smaller device size. Use of a 10 μF capacitor results in the current limit being increased to that of the next larger device size for TNY285-290. • It provides a shutdown function. When the current into the bypass pin exceeds ISD, the device latches off until the BP/M voltage drops below 4.9 V, during a power-down or, when the UV function is employed with external resistors connected to the BP/UV pin, by taking the UV/EN pin current below I UV minus the reset hysteresis (Typ. 18.75 μA). This can be used Figure 3. Functional Block Diagram. PI-6639-113011 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 μA 25 μA LINE UNDER-VOLTAGE RESET AUTO- RESTART COUNTER JITTER 1.0 V 6.4 V BYPASS CAPACITOR SELECT AND CURRENT LIMIT STATE MACHINE OVP LATCH LINE COMPENSATION Figure 4. Pin Configuration. PI-6577-053112 P Package (DIP-8C) 12 S 11 S 10 S 9 S 8 S 7 S EN/UV 1 BP/M 2 N/C 3 N/C 4 D 6 K Package (eSOP-12B) Exposed Pad (On Bottom) Internally Connected to SOURCE Pin D Package (SO-8C) EN/UV 1 BP/M 2 D 4 8 S 7 S 6 S 5 S 5 S 7 S 8 S D 4 BP/M 2 EN/UV 1 6 S |
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