NTE7166

NTE7166 Integrated Circuit Flyback Switching Regulator Description: The NTE7166 is an integrated circuit in a 5 - Lead Staggered TO3P type package and is specifically designed to satisfy the requirements for increased integration and reliability in off - line quasi- resonant flyback converters. This device incorporates a primary control and drive circuit with discrete avalanche - rated power MOSFETs. Cycle - by - cycle current limiting, under - voltage lockout with hysteresis, over - voltage protection, and thermal shutdown protects the power supply during th normal overload an fault conditions. Over voltge protection and thermal shutdown are latched after a short delay. The latch may be reset by cycling the input supply. Low - current startup and a low - power standby mode selected from the secondary circuit completes a comprehensive suite of features. Features: D Flyback Operation with Quasi - Resonant Soft Switching for Low Power Dissipation and EMI D Rugged Avalanche - Rated MOSFET D Full Over - Current Protection (No Blanking) D Under - Voltage Lockout with Hysteresis D Over - Voltage Protection D Direct Voltage Feedback D Low Start - Up Current D Low - Frequency, Low - Power Standby Operation Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Control Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Drain - Source Voltage, VDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450V Drain Switching Current, ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A Peak Drain Current, IDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A Avalanche Energy, EAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327mJ OCP/FB Voltage Range, VOCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.3V to +6V Power Dissipation (VIN x IIN(ON)), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8W FET Channel Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Internal Case Temperature, TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 20° to +125°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40° to +125°C Thermal Resistance, Junction - to - Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75°C/W Electrical Characteristics: (TA = +25°C, VIN = 18V unless otherwise specified) Parameter On - State Voltage Under- Voltage Lockout Over - Voltage Threshold Drain- Source Breakdown Voltage Drain Leakage Current On - State Resistance Output Power Maximum Off Time Minimum Pulse Duration for Input of Quasi- Resonant Signals Minimum Off Time Feedback Threshold Voltage Over - Current Protection/Feedback Sink Current Latch Holding Current Latch Release Voltage Switching Time Supply Current Insulation RMS Voltage Symbol VINT VINQ VOVP(th) VBR(DSS) IDSS rDS(ON) POUT toff tw(th) toff VFDBK IOCP/FB IIN(OVP) VIN tf IIN(ON) IIN(OFF) Test Conditions Turn - On, Increasing VIN Turn - Off, Decreasing VIN Turn - Off, Increasing VIN ID = 300µA At VDSmax VS = 10V, ID = 0.9A, TJ = +25°C VIN = 100Vrms VIN = 120Vrms Drain Waveform High Drain Waveform High, Note 1 Drain Waveform High, Note 1 Drain Waveform Low to High, Note 1 Oscillator Synchronized, Note 2 VOCP/FB = 1.0V VIN Reduced from 24.5V to 8.5V IIN ≤ 20µA, VIN Reduced from 24.5V VDD = 200V, ID = 0.9A Operating, Note 3 Increasing VIN Prior to Oscillation Min 14.4 9 20.5 VDSmax 45 0.68 1.30 1.20 6.6 2000 Typ 16.0 10 22.5 0.73 1.45 1.35 Max 17.6 11 24.5 300 0.58 145 190 55 1.0 1.5 0.78 1.60 1.50 400 8.4 250 30 100 Unit V V V V µA Ω W W µs µs µs V V mA µA V ns mA µA V °C VWM(RMS) All Terminals Simultaneous reference to a Metal Plate Against the backside TJ Thermal Shutdown 140 - - Note 1. Feedback is square wave, VIM = 2.2V, th = 1µs, tl = 35µs. Note 2. For quasi - resonant operation, the input signal must be longer than tw(th) and greater than VFDBK. Note 3. Feedback is square wave, VIM = 2.2V, th = 4µs, tl = 1µs. Pin Connection Diagram (Front View) 5 GND 4 Supply 3 Drain 2 Source 1 Overcurrent & Feedback .217 (5.5) .614 (15.6) .217 (5.5) .136 (3.45) .126 (3.2) Dia .905 (23.0) 1 5 .275 (7.0) .217 (5.5) .100 (2.54) .177 (4.5)