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MC33129

Motorola
Part Number MC33129
Manufacturer Motorola
Description (MC33129 / MC34129) High Performance Current Mode Controller
Published Mar 19, 2010
Detailed Description Order this document by MC34129/D www.DataSheet4U.com MC34129 MC33129 High Performance Current Mode Controllers The MC34...
Datasheet PDF File MC33129 PDF File

MC33129
MC33129

Overview
Order this document by MC34129/D www.
DataSheet4U.
com MC34129 MC33129 High Performance Current Mode Controllers The MC34129/MC33129 are high performance current mode switching regulators specifically designed for use in low power digital telephone applications.
These integrated circuits feature a unique internal fault timer that provides automatic restart for overload recovery.
For enhanced system efficiency, a start/run comparator is included to implement bootstrapped operation of VCC.
Other functions contained are a temperature compensated reference, reference amplifier, fully accessible error amplifier, sawtooth oscillator with sync input, pulse width modulator comparator, and a high current totem pole driver ideally suited for driving a power MOSFET.
Also included are protective features consisting of soft–start, undervoltage lockout, cycle–by–cycle current limiting, adjustable deadtime, and a latch for single pulse metering.
Although these devices are primarily intended for use in digital telephone systems, they can be used cost effectively in many other applications.
• Current Mode Operation to 300 kHz HIGH PERFORMANCE CURRENT MODE CONTROLLERS SEMICONDUCTOR TECHNICAL DATA 14 1 P SUFFIX PLASTIC PACKAGE CASE 646 • • • • • • • • • Automatic Feed Forward Compensation Latching PWM for Cycle–by–Cycle Current Limiting Continuous Retry after Fault Timeout Soft–Start with Maximum Peak Switch Current Clamp Internally Trimmed 2% Bandgap Reference High Current Totem Pole Driver Input Undervoltage Lockout Low Startup and Operating Current Direct Interface with Motorola SENSEFET Products Drive Output Drive Ground Ramp Input 14 1 D SUFFIX PLASTIC PACKAGE CASE 751A (SO–14) PIN CONNECTIONS 1 2 3 14 VCC 13 Start/Run Output 12 CSoft–Start Feedback/ 11 PWM Input Error Amp 10 Inverting Input 9 Error Amp Noninverting Input 8 Vref 1.
25 V (Top View) Simplified Block Diagram Start/Run 12 Soft–Start and Fault Timer Undervoltage Lockout 1.
25V Reference Gnd 7 Error Amp 6 X2 Latch...


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