UC3638DWG4

TEXAS INSTRUMENTS  UC3638DWG4  芯片, 直流电机控制器

The is an advanced PWM Motor Controller with under-voltage lockout function. The advanced pulse width modulator intended for a variety of PWM motor drive and amplifier applications requiring either unidirectional or bi-directional drive circuits. Similar in architecture to the UC2637, all necessary circuitry is included to generate an analogue error signal and modulate two bi-directional pulse train outputs in proportion to the error signal magnitude and polarity. Key features of the UC2638 include a programmable high speed triangle oscillator, a 5x differential current sensing amplifier, a high slew rate error amplifier, high speed PWM comparators and two 50mA open collector as well as two ±500mA totem pole output stages. The individual circuit blocks are designed to provide practical operation to switching frequencies of 500kHz. Additional features include a precision externally available 5V reference, pulse-by-pulse peak current limiting and a remote shutdown port.

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Accurate high speed oscillator

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Bidirectional pulse-by-pulse current limiting

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Programmable oscillator amplitude and PWM deadband

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500mA Dual totem pole output drivers

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60V/50mA Dual open collector drivers

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Green product and no Sb/Br