Datasheet > UC1638DW

UC1638DW

更新时间： 2024-11-23 23:38:51

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其他 - ETC		/
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描述
Industrial Control IC

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UC1638DW 数据手册

UC1638

UC2638

UC3638

Advanced PWM Motor Controller

DESCRIPTION

FEATURES

•

Single or Dual Supply Operation The UC1638 family of integrated circuits are advanced pulse width modula-

tors intended for a variety of PWM motor drive and amplifier applications re-

quiring either uni-directional or bi-directional drive circuits. Similar in

Accurate High Speed Oscillator

architecture to the UC1637, all necessary circuitry is included to generate an

analog error signal and modulate two bi-directional pulse train outputs in pro-

portion to the error signal magnitude and polarity.

Differential X5 Current Sense

Amplifier

•

Bidirectional Pulse-by-Pulse

Current Limiting

Key features of the UC1638 include a programmable high speed triangle os-

cillator, a 5X differential current sensing amplifier, a high slew rate error am-

plifier, high speed PWM comparators, and two 50mA open collector as well

Programmable Oscillator

Amplitude and PWM Deadband

as two 500mA totem pole output stages. The individual circuit blocks are

Dual 500mA Totem Pole Output

Drivers

designed to provide practical operation to switching frequencies of 500kHz.

Significant improvements in circuit speed, elimination of many external pro-

gramming components, and the inclusion of a differential current sense am-

plifier, allow this controller to be specified for higher performance

applications, yet maintain the flexibility of the UC1637. The current sense

amplifier in conjunction with the error amplifier can be configured for average

current feedback. The additional open collector outputs provide a drive signal

Dual 60V, 50mA Open Collector

Drivers

Undervoltage Lockout

continued

BLOCK DIAGRAM

UDG-95048-4

1/98

12 3 4 5 6 7...9

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