NTE7044 Datasheet, PDF (1/2 Pages) NTE Electronics – Integrated Circuit Switching Regulator Control Circuit

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: (T_A = +25°C unless otherwise specified)
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Circuit Voltage
V_6–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 14.4V
V₁, V₂, V_4–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V_6–5
V_3–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 10V
V_7–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 8V
V₈, V_9–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –3V to +4V
Supply Current, I₆ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA
Circuit Current, I₄ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1mA to +50mA_peak
Power Dissipation, P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260mW
Local Power Dissipation (Q₁), P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mW
Operating Ambient Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperatuere Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Note 1. + is flow–in current to the circuit, while – is flow–out current.
Electrical Characteristics: (T_A = +25°C, V_CC = 12V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Total Circuit Current
Oscillation Frequency
Output Pulse Duty (Min)
I_tot
f_OSC
t_w(duty)
8.4 10.5 12.6 mA
14.0 14.8 15.6 kHz
67 72 77 %
Output Pulse Duty (Max)
t_w(duty)
–
0
0
%