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NTE7002 Integrated Circuit Switched Mode Power Supply Control
Description: The NTE7002 is a bipolar integrated circuit in a 9-Lead SIP type package that drives, regulates, and monitors the switching transistor in a power supply based on the ringing choke flyback principle. Due to the wide regulating range and the high voltage stability during large load changes, SMPS for Hi-Fi equipment and active loudspeakers can be realized as well as applications in TV receivers and video recorders. Features: D Wide Operational Range D High Voltage Stability Even at High Load Changes D Direct Control of Switching Transistor D Low Start-Up Current D Linear Foldback of the Overload Characteristic D Base Drive Proportional to the Current Through the Power Switching Transistor D Stand-By Mode 3.5W into the External Load D Inhibit Capability (TTL Compatible) D Undervoltage Lockout Absolute Maximum Ratings: Supply Voltage, V9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Sink Output Voltage V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V9V V7-V8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Reference Output, I1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10 to +1.0mA Zero Crossing, I2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3.0 to +3.0mA Control Amplifier, I3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3.0 to 0mA Collector Current, I4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.0 to +5.0mA Trigger Input, I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.0 to +3.0mA Sink Output, I7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5A Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +125C Thermal Resistance, Junction-to-Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +70C/W Thermal Resistance, Junction-to-Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15C/W
Electrical Characteristics: (TA = +25C unless otherwise specified)
Parameter Supply Voltage Ambient Temperature Start Operation (TA = +25C) Current Consumption (V1 Not Yet Switched) I9 V9 = 3.0V V9 = 5.0V V9 = 10V Turn-On Point for V1 V4 Before Start-Up (V9 < 11.8V) Current Consumption Reference Voltage Reference Voltage Temperature Coefficient VPin4 Low Static Voltage VPin4 Regulation Peak Voltage VPin3 Full Fold Back VPin3 Fold Back VPin3 Overload Decision VPin3 Regulation VPin3 IPin3 Regulation VPin3 IPin3 Leakage VPin7 Peak High V7(peak) I3 VPin3 = 1.5V VR = 0V (Full Fold Back) VR = -10V (Regulation) VR = -15V (Stand-By) VPin7 Peak Low V7(peak) VR = 0V VR = -10V VR = -15V IPin7 Sink Peak IPin8 Source Peak VPin2 I7(peak) I8(peak) V2 VR = -15V VR = -15V IPin2 = -3.0mA IPin2 = -0.3mA IPin2 = +3.0mA IPin2 = +0.3mA Protective Operation (V9 = 15V, TA = +25C) Current Consumption Turn-Off Voltage I9 V7 V4 V5 < 1.8V V5 < 1.8V 14 1.3 1.8 20 1.5 2.1 26 1.8 2.5 mA V V9 V4 I9 V1 TC1 V4 V4(peak) V3 IPin3 = 5.0A IPin3 = 1.3mA IPin3 = 1.3mA IPin3 = 0.5mA IPin3 = 1.0A Vreg = -10V Vreg = 0 I1 < 0.1mA I1 = 5.0mA - - - 11.3 6.0 110 55 4.0 4.0 - 1.8 4.0 - - - - - - - - - - - - - - - - - - - - 1.5 2.0 11.8 6.7 135 85 4.2 4.2 100 2.08 4.2 2.4 3.7 2.5 2.4 2.11 1.0 0.4 3.5 4.0 5.0 1.4 1.45 1.57 +0.7 -0.8 -0.3 -0.2 +0.7 +0.8 0.5 2.0 3.2 12.3 - 160 110 4.5 4.4 - 2.5 4.5 3.0 4.0 3.0 2.9 - - - - - - - - - - - - - - - A A V V V A V ppm/C V V V V V mA mA Symbol V9 TA Test Conditions Min - -15 Typ 15 - Max 18 +85 Unit V C
Regulation Mode (V9 = 15V, TA = +25C)
Electrical Characteristics (Cont'd): (TA = +25C unless otherwise specified)
Parameter External Trigger Input Supply Voltage Disabling V8 amd V1 VPin5 Zener Voltage IPin5 Turn-On Time (Secondary Voltages) Voltage Change Stand-By Operation (Minimum Secondary Power: 3W) Switching Frequency During Stand-By Mode Primary Power Consumption During Stand-By Mode Symbol V5 V19 V5 I5 ton V2 V2 f Pprim The Heat Sink Must Be Optimized, Taking the Maximum Data (TJ, RJC, TA) into Consideration S3 = Closed, P3 = 19W S2 = Closed, P2 = 15W S1 = Open Pin5 Open VPin5 = 3.0V VPin5 = 0V Test Conditions Enable Voltage, Vreg = 0V Disable Voltage, Vreg = 0V Min - 2.0 6.7 6.5 - - - - - - 70 - Typ 2.2 2.2 7.4 7.3 1.4 -11 350 100 500 20 75 10 Max 2.4 - 7.8 7.8 - - 450 500 1000 30 - 15 V kHz VA ms mV V V A Unit V Protective Operation (Cont'd) (V9 = 15V, TA = +25C)
Pin Connection Diagram (Front View)
9 8 7 6 5 4 3 2 1
VCC Source Output Sink Output GND Shut Down Sawtooth Generator Feedback Zero Detection Reference
.897 (23.0) .874 (22.2) .135 (3.54) .143 (3.65)
.377 (9.6)
.260 (6.6) 1 9 .106 (2.7)
.100 (2.54)Typ
.165 (4.2) Min
ALL Dimensions are Max.

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