Description

The IMP38C43ESD is a fixed frequency, high-performance current-mode PWM controller. It is a part of the 384x series of IC chips and is designed with IMP's BiCMOS technology, offering several improvements over previous models. These improvements include zero cross-conduction/shoot-through current, reduced start-up and operating current, lower current-sense delay, higher frequency operation, full supply voltage swing at the output, and a 1% trimmed voltage reference. The output driver stage of the IMP38C43ESD has zero cross-conduction current, setting it apart from other PWM devices in its category.

Specifications and features

• 384x Series Pinout with BiCMOS Technology
• Zero Cross-Conduction Current by Design
• 1MHz Operation
• 65ns Maximum Current-Sense Delay
• 120µA Maximum Start-Up Current
• 1.5mA Maximum Operating Current
• High Output Current Drive
• 1.0A for IMP38HC4x
• 0.5A for IMP38C4x
• 20V Maximum Supply Voltage
• 2.5V, 1% Trimmed Error Amplifier Reference
• Trimmed Oscillator Discharge Current
• Pin-for-Pin Enhanced Replacements for Micrel MIC38C/HC4x and GMT38C4x/HC4x

Application Scenarios

The IMP38C43ESD is suitable for various applications including power supply control, motor control systems, lighting systems, and other circuits where a high-performance PWM controller is required. Its zero cross-conduction current design and high output current drive make it an ideal choice for applications where efficiency and precision are crucial.

Comparison

• Zero cross-conduction/shoot-through current design
• Reduced start-up and operating current
• Lower current-sense delay
• Higher frequency operation
• Full supply voltage swing at the output
• 1% trimmed voltage reference
• Proprietary output state-machine for zero cross-conduction current

Currently, no specific disadvantages have been identified for the IMP38C43ESD.