NTE7044 データシートの表示（PDF） - NTE Electronics
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NTE7044 Datasheet PDF : 2 Pages
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NTE7044
Integrated Circuit
Switching Regulator Control Circuit
Description:
The NTE7044 is an integrated circuit in a 9–Lead SIP type package which contains a PWM switching
regulator control circuit and protect circuit on a single chip.
Features:
D Soft Start Circuit
D 0 to 0.7 Duty
D Protection Circuit for Overvoltage and Current
D External Trigger Available
D High Supply Voltage Protection
D Low Supply Voltage Protection
D Reference Voltage Provided by an External Zener Diode
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Circuit Voltage
V6–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 14.4V
V1, V2, V4–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V6–5
V3–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 10V
V7–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 8V
V8, V9–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –3V to +4V
Supply Current, I6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA
Circuit Current, I4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1mA to +50mApeak
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260mW
Local Power Dissipation (Q1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mW
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperatuere Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Note 1. + is flow–in current to the circuit, while – is flow–out current.
Electrical Characteristics: (TA = +25°C, VCC = 12V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Total Circuit Current
Oscillation Frequency
Output Pulse Duty (Min)
Itot
fOSC
tw(duty)
8.4 10.5 12.6 mA
14.0 14.8 15.6 kHz
67 72 77 %
Output Pulse Duty (Max)
tw(duty)
–
0
0
%
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