NTE7099 查看數據表（PDF） - NTE Electronics

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NTE7099

Integrated Circuit Current Mode Pulse Width Modulator (PWM) Control Circuit

NTE Electronics 

NTE7098 & NTE7099

Integrated Circuit

Current Mode Pulse Width Modulator (PWM)

Control Circuit

Description:

The NTE7098 and NTE7099 are integrated circuits in 8–Lead DIP type packages that incorporate a

new precision temperature–controlled oscillator to minimize variations in frequency. An internal

toggle flip–flop, which blanks the output off every other clock cycle, limits the duty–cycle range to less

than 50%. An under–voltage lockout ensures that VREF is stabilized before the output stage is en-

abled.

Other features include low start–up current, pulse–by–current limiting, and high–current totem pole

output for driving capacitive loads, such as the gate of a power MOSFET. The output is low in the

off state, consistent with N–channel devices.

Features:

D Optimized for Off–Line Control

D Temperature Compensated Oscillator

D 50% Maximum Duty–Cycle Clamp

D Vref Stabilized before Output Stage is Enabled

D Low Start–Up Current

D Pulse–by Pulse Current Limiting

D Improved U/V Lockout

D Double Pulse Suppression

D 1% Trimmed Bandgap Reference

D High Current Totem Pole Output

Absolute Maximum Ratings:

Supply Voltage (ICC < 30mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self Limiting

Supply Voltage (Low Impedence Source) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V

Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1A

Output Energy (Capacitive Load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5µJ

Analog Inputs (VFB, VSENSE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VCC

Error Amp Output Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA

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