Datenblatt-Suchmaschine für elektronische Bauteile |
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UC3826 Datenblatt(PDF) 1 Page - Texas Instruments |
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UC3826 Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 11 page Secondary Side Average Current Mode Controller UC1826 UC2826 UC3826 FEATURES • Practical Secondary Side Control of Isolated Power Supplies • 1MHz Operation • Tailored Loop Bandwidth Provides Excellent Noise Immunity • Voltage Feedforward Provides Superior Transient Response • Accurate Programmable Maximum Duty Cycle • Multiple Chips Can be Synchronized to Fastest Oscillator • Wide Gain Bandwidth Product (70MHz, Acl>10) Current Error Amplifier • Up to Ten Devices Can Easily Share a Common Load DESCRIPTION The UC1826 family of average current mode controllers accurately accomplishes secondary side average current mode control. The sec- ondary side output voltage is regulated by sensing the output voltage and differentially sensing the AC switching current. The sensed output voltage drives a voltage error amplifier. The AC switching current, mon- itored by a current sense resistor, drives a high bandwidth, low offset current error amplifier. The output of the voltage error amplifier can be used to drive the current amplifier which filters the measured inductor current. Fast transient response is accomplished by utilizing voltage feedforward in generating the PWM ramp. The UC1826 features load share, oscillator synchronization, undervolt- age lockout, and programmable output control. Multiple chip operation can be achieved by connecting up to ten UC1826 chips in parallel. The SHARE bus and CLKSYN bus provide load sharing and synchroniza- tion to the fastest oscillator respectively. With its tailored bandwidth, the UC1826 provides excellent noise immunity and is an ideal controller to achieve high power, secondary side average current mode control. 7/95 BLOCK DIAGRAM UDG-95013 Pin Numbers refer to 24-pin packages. |
Ähnliche Teilenummer - UC3826 |
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Ähnliche Beschreibung - UC3826 |
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