NTE7109 Integrated Circuit Switching Regulator Control Description: The NTE7109 is a primary switching regulator controller in a 16–Lead DIP type package designed to get the regulated DC voltage from an AC power supply. This device can directly drive a MOSFET with fast rise and fall output pulses. The NTE7109 contains not only a high frequency OSC and fast output drive, but also a current limiter with fast response and high sensibility so a true “fast switching regulator” can be realized. By adding additional compenents to the primary side, a timer–type protection circuit can be made for protection against short–circuit and overcurrent. Features: D 500kHz Operation to MOSFET • Output Current: ±2A • Output Rise Time: 60ns; Fall Time: 40ns • Modified Totem–Pole Output Method with Low Through Current D Compact and Light–Weight Power Supply • Low Start–Up Current: 90µA Typ. • Wide Range Between “Start–Up Voltage” and “Stop Voltage” make the Power Input Smooting Capacitor Low; Start–Up Threshold Voltage: 16V; Stop Voltage: 10V • High Power Dissipation Package withstands the Heat Generated bt the Gate–Drive Current of a MOSFET D Simplified Peripheral Circuit with Protection Circuit and Built–In Large–Capacity Totem–Pole Output • High–Speed Current Limiting Circuit using Pulse–by–Pulse Method (Two Systems of CLM+pin, CLM–pin) • Protection by Intermittent Operation of Output Overcurrent: Timer Protection Circuit • Overvoltage Protection Circuit with an Externally Resettable Latch (OVP) • Protection Circuit for Output Miss Action at Low Supply Voltage (UVLO) D High–Performance and Highly Functional Power Supply • Triangular Wave Oscillator for Easy Dead Time Setting Applications: D Feed Forward Regulator D Flyback Regulator Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31V Collector Voltage, VC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31V Output Current, IO Peak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2A Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5A VF Terminal Voltage, VVF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC ON/OFF Terminal Voltage, VON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC CLM – Terminal Voltage, VCLM – . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –4.0 to +4.0V CLM + Terminal Voltage, VCLM + . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +4.0V OVP Terminal Current, IOVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA DET Terminal Voltage, VDET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V DET Terminal Input Current, IDET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA F/B Terminal Voltage, VF/B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 10V T–ON Terminal Input Current, ITON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1mA T–OFF Terminal Input Current, ITOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –2mA Power Dissipation (TA = +25°C), Pd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5W Derate Above 25° . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12mW/°C Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +85°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Note 1. “+” sign shows the direction of current flow into the IC and “–” sigh shows the current flow from the IC. Note 2. This terminal has the constant voltage characteristic of 6V to 8V when current is supplied from outside. The maximum allowable voltage is 6V when the constant voltage is applied to this terminal. And maximum allowable current into this terminal is 5mA. Note 3. The low impedance voltage supply should not be applied to the OVP terminal. Recommended Operating Conditions: Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage Range VCC 12 18 30 V Operating Frequency fOSC – – 500 kHz Oscillator Frequency Setting Resistance T–ON Pin Resistance RON 10 – 75 kΩ ROFF 2 – 30 kΩ Min Typ Max Unit VCC VCC(STOP) – 30 V Operation Start–Up Voltage VCC(START) 15.2 16.2 17.2 V Operation Stop Voltage VCC(STOP) 9.0 9.9 10.9 V T–OFF Pin Resistance Electrical Characteristics: (VCC = 18V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Supply Voltage Circuit Current Operating Supply Voltage Range Difference Between Operation Start and Stop Voltage ∆VCC ∆VCC = VCC(START) – VCC(STOP) 5.0 6.3 7.6 V Stand–By Current ICCL VCC = 14.5V, TA = +25°C 50 90 140 µA VCC = 14.5V, –30° ≤ TA ≤ +85°C 40 90 190 µA Electrical Characteristics (Cont’d): (VCC = 18V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage Circuit Current (Cont’d) Operating Circuit Current Circuit Current in OFF State Circuit Current in Timer OFF State Circuit Current in OVP State ICCO VCC = 30V 10 15 21 mA ICC OFF VCC = 25V 0.95 1.31 5.0 mA VCC = 14V 50 90 140 µA VCC = 25V 0.95 1.35 2.0 mA VCC = 14V – 160 240 µA VCC = 25V 1.3 2.0 3.0 mA VCC = 14V 126 200 310 ICC CT ICC OVP ON/OFF High Threshold Voltage VTHH ON/OFF 2.1 2.6 3.1 V Low Threshold Voltage VTHL ON/OFF 1.9 2.4 2.9 V Hysterisis ∆VTH ON/OFF 0.1 0.2 0.3 V –1.54 F/B Current at 0% Duty IFB MIND F/B Terminal Input Current –2.1 –1.0 mA Current at Maximum Duty IFB MAXD F/B Terminal Input Current –0.90 –0.55 –0.40 mA Current Difference Between Max and 0% Duty ∆IFB ∆IFB = IFB MIND – IFB MAXD –1.35 –0.99 –0.70 mA Terminal Voltage VFB F/B Terminal Input Current = 0.95mA Terminal Resistance 4.9 5.9 7.1 V RFB 420 600 780 Ω VDET 2.4 2.5 2.6 V – 1.0 3.0 µA Detection Detection Voltage Input Current of Detection Amp IIN DET VDET = 2.5V Voltage Gain of Detection Amp GAV DET 30 40 – dB High Threshol Voltage VTH OVPH 540 750 960 mV Hysterisis Voltage ∆VTH OVP – 30 – mV Threshold Current ITH OVP 80 150 250 µA Input Current IIN OVP VOVP = 400mV 80 150 250 µA OVP Terminal is Open (High Impedance) 7.5 9.0 10.0 V 0.55 1.20 – V VCC = 30V –480 –320 –213 µA VCC = 18V –210 –140 –93 µA VTH OVP 1.00 1.40 1.90 V IIN OVP – 1.2 3.6 µA Reset Supply Voltage VCC OVPC 7.6 8.6 9.6 V Difference Between Operation Supply Voltage Stop and OVP Reset VCC (STOP) –VCC OVPC 0.65 1.30 – V OVP Reset Supply Voltage VCC OVPC Difference Between Operation Supply Voltage Stop and OVP Reset VCC (STOP) –VCC OVPC Current From OVP Terminal for OVP Reset ITH OVPC ∆VTH OVP = VTH OVPH – VTH OVPL OVP Threshold Voltage Input Current Electrical Characteristics (Cont’d): (VCC = 18V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Timer Timer Frequency ITIMER CT = 4.7µF 0.27 0.40 0.60 Hz Timer Charge Current ITIM CH VCT = 3.3V, TA = –5°C –193 –138 –102 µA TA = +25°C –178 –127 –94 µA TA = +85°C –147 –105 –78 µA 7.0 8.7 11.0 –5° ≤ TA ≤ 85°C –220 –200 –180 mV VCLM– = –0.1V –170 –125 –90 µA – 170 – ns OFF Time/ON Time Ratio TIMEOFF/ON CLM – Threshold Voltage Input Current Delay Time from CLM– to VOUT VTH CLM– IIN CLM– TPD CLM– CLM + Threshold Voltage Input Current Delay Time from CLM+ to VOUT VTH CLM+ –5° ≤ TA ≤ 85°C 180 200 220 mV IIN CLM+ VCLM+ = –0.1V –270 –205 –140 µA – 130 – ns RON = 20kΩ, ROFF = 17kΩ, CF = 220pF, –5°° ≤ TA ≤ 85°C ° 170 188 207 kHz 47 50 53 % TPD CLM+ Oscillator Oscillating Frequency fOSC Maximum ON Duty TDUTY Upper Limit of Oscillation Waveform VOSCH fOSC = 188kHz 3.97 4.37 4.77 V Lower Limit of Oscillation Waveform VOSCL fOSC = 188kHz 1.76 1.96 2.16 V Difference Betwee Upper Limit and Lower Limit Voltage of OSC Waveform ∆VOSC fOSC = 188kHz 2.11 2.41 2.71 V fOSC VF VF = 5V 170 188 207 kHz 108 124 143 kHz 11.0 13.7 22.0 2.7 3.0 3.3 V Source Current – 2 6 µA VOL 1 VCC = 18V, IO = 10mA – 0.05 0.4 V VOL 2 VCC = 18V, IO = 100mA – 0.7 1.4 V VOL 3 VCC = 5V, IO = 1mA – 0.69 1.0 V VOL 4 VCC = 5V, IO = 100mA – 1.3 2.0 V VOH 1 VCC = 18V, IO = –10mA 16.0 16.5 – V VOH 2 VCC = 18V, IO = –100mA 15.5 16.0 – V Output Voltage Rise Time TRISE No Load – 50 – ns Output Voltage Fall Time tFALL No Load – 35 – ns VF OSC Frequency in CLM Operating State VF = 2V Duty in CLM Operating State TVF DUTY Timer Operating Start Voltage VTH TIME Input Current IVF RON = 20kΩ, ROFF = 17kΩ, CF = 220pF VF = 0.2V, Min OFF Duty/Max ON Duty Output Output Low Voltage Output High Voltage Pin Connection Diagram 16 VCC Collector 1 VOUT 2 15 CLM (+) Emitter 3 14 CLM (–) VF 4 13 GND ON/OFF 5 12 CT OVP (Shut Down) 6 11 T – OFF 10 OSC Capacitance DET 7 F/B 8 16 9 T – ON 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)