ic電源uc3637d直流電機(jī)驅(qū)動(dòng)的開(kāi)關(guān)模式控制器

uc3637dw

用于直流電機(jī)驅(qū)動(dòng)的開(kāi)關(guān)模式控制器

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產(chǎn)品信息

特性

• single or dual supply operation
• ±2.5v to ±20v input supply range
• ±5% initial oscillator accuracy; ±10% over temperature
• pulse-by-pulse current limiting
• under-voltage lockout
• shutdown input with temperature compensated 2.5v threshold
• uncommitted pwm comparators for design flexibility
• dual 100ma, source/sink output drivers

說(shuō)明

the uc1637 is a pulse width modulator circuit intended to be used for a variety of pwm motor drive and amplifier applications requiring either uni-directional or bi-directional drive circuits. when used to replace conventional drivers, this circuit can increase efficiency and reduce component costs for many applications. all necessary circuitry is included to generate an analog error signal and modulate two bi-directional pulse train outputs in proportion to the error signal magnitude and polarity.

this monolithic device contains a sawtooth oscillator, error amplifier, and two pwm comparators with ±100ma output stages as standard features. protection circuitry includes under-voltage lockout, pulse-by-pulse current limiting, and a shutdown port with a 2.