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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: 90A 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 = +25C), Pd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5W Derate Above 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12mW/C Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 to +85C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +125C 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 Supply Voltage Range Operating Frequency Oscillator Frequency Setting Resistance T-ON Pin Resistance T-OFF Pin Resistance Symbol VCC fOSC RON ROFF Test Conditions Min 12 - 10 2 Typ 18 - - - Max 30 500 75 30 Unit V kHz k k
Electrical Characteristics: (VCC = 18V, TA = +25C unless otherwise specified)
Parameter Supply Voltage Circuit Current Operating Supply Voltage Range Operation Start-Up Voltage Operation Stop Voltage Difference Between Operation Start and Stop Voltage Stand-By Current VCC VCC(START) VCC(STOP) VCC ICCL VCC = VCC(START) - VCC(STOP) VCC = 14.5V, TA = +25C VCC = 14.5V, -30 TA +85C VCC(STOP) 15.2 9.0 5.0 50 40 - 16.2 9.9 6.3 90 90 30 17.2 10.9 7.6 140 190 V V V V A A Symbol Test Conditions Min Typ Max Unit
Electrical Characteristics (Cont'd): (VCC = 18V, TA = +25C 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 ICCO ICC OFF ICC CT ICC OVP VCC = 30V VCC = 25V VCC = 14V Circuit Current in Timer OFF State VCC = 25V VCC = 14V Circuit Current in OVP State VCC = 25V VCC = 14V ON/OFF High Threshold Voltage Low Threshold Voltage Hysterisis F/B Current at 0% Duty Current at Maximum Duty Current Difference Between Max and 0% Duty Terminal Voltage Terminal Resistance Detection Detection Voltage Input Current of Detection Amp Voltage Gain of Detection Amp OVP High Threshol Voltage Hysterisis Voltage Threshold Current Input Current Reset Supply Voltage Difference Between Operation Supply Voltage Stop and OVP Reset Current From OVP Terminal for OVP Reset OVP Threshold Voltage Input Current Reset Supply Voltage Difference Between Operation Supply Voltage Stop and OVP Reset VTH OVP IIN OVP VCC OVPC VCC (STOP) -VCC OVPC 1.00 - 7.6 0.65 1.40 1.2 8.6 1.30 1.90 3.6 9.6 - V A V V VTH OVPH VTH OVP ITH OVP IIN OVP VCC OVPC VCC (STOP) -VCC OVPC ITH OVPC VOVP = 400mV OVP Terminal is Open (High Impedance) VTH OVP = VTH OVPH - VTH OVPL 540 - 80 80 7.5 0.55 750 30 150 150 9.0 1.20 960 - 250 250 10.0 - mV mV A A V V VDET IIN DET GAV DET VDET = 2.5V 2.4 - 30 2.5 1.0 40 2.6 3.0 - V A dB IFB MIND IFB MAXD IFB VFB RFB F/B Terminal Input Current F/B Terminal Input Current IFB = IFB MIND - IFB MAXD F/B Terminal Input Current = 0.95mA -2.1 -1.54 -1.0 mA mA mA V VTHH ON/OFF VTHL ON/OFF VTH ON/OFF 2.1 1.9 0.1 2.6 2.4 0.2 3.1 2.9 0.3 V V V 10 0.95 50 0.95 - 1.3 126 15 1.31 90 1.35 160 2.0 200 21 5.0 140 2.0 240 3.0 310 mA mA A mA A mA
-0.90 -0.55 -0.40 -1.35 -0.99 -0.70 4.9 420 5.9 600 7.1 780
VCC = 30V VCC = 18V
-480 -210
-320 -140
-213 -93
A A
Electrical Characteristics (Cont'd): (VCC = 18V, TA = +25C unless otherwise specified)
Parameter Timer Timer Frequency Timer Charge Current ITIMER ITIM CH CT = 4.7F VCT = 3.3V, TA = -5C TA = +25C TA = +85C OFF Time/ON Time Ratio CLM - Threshold Voltage Input Current Delay Time from CLM- to VOUT CLM + Threshold Voltage Input Current Delay Time from CLM+ to VOUT Oscillator Oscillating Frequency Maximum ON Duty Upper Limit of Oscillation Waveform Lower Limit of Oscillation Waveform Difference Betwee Upper Limit and Lower Limit Voltage of OSC Waveform VF OSC Frequency in CLM Operating State Duty in CLM Operating State Timer Operating Start Voltage Input Current Output Output Low Voltage VOL 1 VOL 2 VOL 3 VOL 4 Output High Voltage VOH 1 VOH 2 Output Voltage Rise Time Output Voltage Fall Time TRISE tFALL VCC = 18V, IO = 10mA VCC = 18V, IO = 100mA VCC = 5V, IO = 1mA VCC = 5V, IO = 100mA VCC = 18V, IO = -10mA VCC = 18V, IO = -100mA No Load No Load - - - - 16.0 15.5 - - 0.05 0.7 0.69 1.3 16.5 16.0 50 35 0.4 1.4 1.0 2.0 - - - - V V V V V V ns ns fOSC VF TVF DUTY VTH TIME IVF Source Current VF = 5V VF = 2V RON = 20k, ROFF = 17k, CF = 220pF 170 108 11.0 2.7 - 188 124 13.7 3.0 2 207 143 22.0 3.3 6 V A kHz kHz fOSC TDUTY VOSCH VOSCL VOSC RON = 20k, ROFF = 17k, CF = 220pF, -5 TA 85C fOSC = 188kHz fOSC = 188kHz fOSC = 188kHz 170 47 3.97 1.76 2.11 188 50 4.37 1.96 2.41 207 53 4.77 2.16 2.71 kHz % V V V VTH CLM+ IIN CLM+ TPD CLM+ -5 TA 85C VCLM+ = -0.1V 180 -270 - 200 -205 130 220 -140 - mV A ns VTH CLM- IIN CLM- TPD CLM- -5 TA 85C VCLM- = -0.1V -220 -170 - -200 -125 170 -180 -90 - mV A ns TIMEOFF/ON 0.27 -193 -178 -147 7.0 0.40 -138 -127 -105 8.7 0.60 -102 -94 -78 11.0 Hz A A A Symbol Test Conditions Min Typ Max Unit
VF = 0.2V, Min OFF Duty/Max ON Duty
Pin Connection Diagram
Collector 1 VOUT VF 2
16 VCC 15 CLM (+) 14 CLM (-) 13 GND 12 CT 11 T - OFF 10 OSC Capacitance 9 T - ON
Emitter 3 4
ON/OFF 5 OVP (Shut Down) 6 DET 7 F/B 8
16
9 .260 (6.6) Max
1
8
.785 (19.9) Max .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)
.300 (7.62)

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