PWM

LM5025B Datasheet PDF – PWM Controller

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Part Number: LM5025B

Function: Active Clamp Voltage Mode PWM Controller

Package: TSSOP 16, WSON 16 Pin Type

Manufacturer: Texas Instruments

Pinouts:

LM5025B datasheet

 

Description

The LM5025B PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The two internal compound gate drivers parallel both MOS and Bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1MHz and total PWM and current sense propagation delays less than 100ns.

Features

• Internal Start-Up Bias Regulator

• 3A Compound Main Gate Driver

• Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis

• Voltage Mode Control with Feed-Forward

• Adjustable Dual Mode Over-Current Protection

• Programmable Overlap or Deadtime between the Main and Active Clamp Outputs

• Volt x Second Maximum Duty Cycle Clamp

• Programmable Soft-Start

• Current Sense Leading Edge Blanking

• Single Resistor Programmable Oscillator

• Oscillator Up / Down Sync Capability

• Precision 5V Reference

• Thermal Shutdown

 

LM5025B Datasheet PDF Download


LM5025B pdf

Other data sheets are available within the file:

LM5025, LM5025BMTC/NOPB, LM5025BMTCX/NOPB, LM5025BSD, LM5025BSD/NOPB

RT9214 Datasheet – Synchronous Buck PWM DC-DC Controller

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Part Number: RT9214

Function : 5V/12V Synchronous Buck PWM DC-DC Controller

Manufacturer: Richtek Technology

Image:  RT9214 Image

General  Descript ion

The RT9214 is a high efficiency synchronous buck PWM controllers that generate logic-supply voltages in PC based systems. These high performance , single output devices include internal soft -start, frequency compensation networks and integrates al   of  the control ,  output adjustment, monitoring and protection functions into a single package.
The device operating at fixed 300kHz frequency provides an optimum compromise between efficiency, external component size, and cost. Adjustable over-current protect ion (OCP) monitors the voltage drop across theRDS(ON) of  the lower MOSFET for synchronous buck PWM DC/DC controller.  The over current  function cycles the soft-start in 4-times hiccup mode to provide fault protection, and in an always hiccup mode for under-voltage protection.

Pinout:

RT9214 Pinout

Official Homepage: http://www.richtek.com/en/Products/Switching%20Regulators/Single-Phase%20Step-Down%20Controller/RT9214

Features

1. Operating with 5V or 12V Supply Voltage
2. Drives All Low Cost N-MOSFETs
3. Voltage Mode PWM Control
4. 300kHz Fixed Frequency Oscillator
5. Fast Transient Response:
– High-Speed GM Amplifier
– Full 0 to 100% Duty Ratio
6. Internal Soft-Start
7. Adaptive Non-Overlapping Gate Driver
8. Over Current Fault Monitor on MOSFET, No Current Sense Resistor Required
9. RoHS Compliant and 100% Lead (Pb)-Free

RT9214 Circuit

RT9214 Datasheet

RT9214 Datasheet


 

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