LM5122MH/NOPB

Switching Controllers Wide Input Sync Boost Controller
6,750 Effective Inventory

LM5122MH/NOPB

Effective Inventory6,750

Switching Controllers Wide Input Sync Boost Controller

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Service & Packaging

Service & Packaging

About After Sales Service

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LM5122MH/NOPB DataSheet
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Details

The LM5122MH/NOPB is a sophisticated synchronous boost controller designed for high-efficiency applications. Using peak-current-mode control, this controller offers advanced features like cycle-by-cycle current limiting and easy loop compensation. With a programmable switching frequency of up to 1 MHz, it allows for flexibility in optimizing efficiency. The inclusion of two robust N-channel MOSFET gate drivers with adaptive dead-time control further enhances performance, while the user-selectable diode-emulation mode ensures improved efficiency at light load conditions. Additionally, an internal charge pump enables 100% duty cycle for high-side synchronous switches, and a 180° phase shifted clock output simplifies multi-phase interleaved configurations. Safety features like thermal shutdown, frequency synchronization, hiccup-mode current limit, and adjustable line undervoltage lockout provide added protection and flexibility for various operating conditions

Key Features

  • Adjustable switching frequency up to 1MHz
  • Programmable soft-start
  • Wide input voltage range

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Topology Boost, Flyback, Forward, SEPIC Vin (min) (V) 3
Vin (max) (V) 65 Vout (min) (V) 3
Vout (max) (V) 100 Regulated outputs (#) 1
Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000
Iq (typ) (mA) 4 Features Enable, Frequency synchronization, Phase Interleaving, Synchronous Rectification, UVLO adjustable
Duty cycle (max) (%) 100 Rating Catalog
Operating temperature range (°C) -40 to 125 Type Controller

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification LM5122MH/NOPB PDF Download

FAQs

What is LM5122MH/NOPB?

The LM5122MH/NOPB is a high-voltage, half-bridge gate driver IC designed by Texas Instruments. It is specifically designed for driving N-channel MOSFETs in high-voltage applications such as synchronous rectification, isolated DC-DC converters, and motor drives.

How Does LM5122MH/NOPB Work?

The LM5122MH/NOPB works by providing the necessary gate drive signals to control the high-side and low-side MOSFETs in a half-bridge configuration. It features adaptive dead time control, programmable slope control, and shoot-through protection to ensure efficient and safe operation of the power stage.

How Many Pins does LM5122MH/NOPB have and What are the Functions of the Pinout Configuration?

The LM5122MH/NOPB is housed in a 10-lead WSON (Wide Small Outline No-Lead) package. The pinout configuration includes:

  • VCC: Power supply pin for the gate driver.
  • HO: High-side gate drive output pin.
  • LO: Low-side gate drive output pin.
  • RT/CT: Dead time and slope control pin.
  • UVLO: Undervoltage lockout pin.
  • PGND: Power ground pin.
  • VSS: Ground pin.
  • HB: Bootstrap pin for the high-side MOSFET.
  • LB: Low-side driver return pin.
  • P/M: Power or manual bootstrap selector pin.

What are the Pros and Cons of LM5122MH/NOPB?

Pros:

  • High Voltage Capability: Suitable for high-voltage applications up to 100V.
  • Adaptive Dead Time Control: Enhances efficiency and reduces shoot-through risk.
  • Programmable Slope Control: Allows optimization for specific MOSFETs and applications.
  • Wide Operating Temperature Range: Can operate in harsh environments.
  • Compact Package: 10-lead WSON package is space-efficient.

Cons:

  • External Components: May require additional external components for optimal performance in certain applications.
  • Complexity: Requires careful consideration of layout and thermal management for high-voltage applications.
  • Package Handling: The 10-lead WSON package may require proper handling techniques during assembly.

Are There Any Equivalents/Alternatives to LM5122MH/NOPB for Recommendation?

  • The IRS2113 from Infineon Technologies is a similar half-bridge gate driver IC suitable for high-voltage applications.
  • Alternatives to the LM5122MH/NOPB include the FAN7382 from Fairchild Semiconductor and the MCP14A0602 from Microchip Technology.

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