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LX7309

Current-Mode DC-DC Controller

Status: In Production

Features:

  • Current-mode control for fast line and load correction responses
  • 50% duty cycle limit for simple Forward converters and for avoiding subharmonic instability in Flyback, Boost and Buck-Boost
  • 200mV peak current sense signal with differential Kelvin sensing for noise immunity and higher efficiency
  • Two out-of-phase driver stages for synchronous rectification and active clamps
  • ROHS-compliant, 24-pin, 4x4 mm QFN
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The LX7309 is a versatile current-mode DC-DC controller for isolated and non-isolated topologies, featuring an internal differential current-sense amplifier for Kelvin connectivity and low 200mV threshold for low sense resistances and high efficiency. The LX7309 provides an out-of-phase drive signal for implementing synchronous rectification or for active clamps. Max duty cycle is 50%, which is helpful in implementing the simple Forward converter topology, but also helps avoid subharmonic instability without requiring slope compensation in other cases. It has differential voltage sensing for implementing other topologies too. The switching frequency can be set from 100-500 kHz, and can be synchronized up to 1MHz. The input has programmable UVLO thresholds. The controller offers Power Fail Warning (PFW). Programmable-threshold Low Power (pulse-skip) Mode is provided to improve light-load efficiency.

Additional Features
  • Current-mode control for fast line and load correction responses
  • 50% duty cycle limit for simple Forward converters and for avoiding subharmonic instability in Flyback, Boost and Buck-Boost
  • 200mV peak current sense signal with differential Kelvin sensing for noise immunity and higher efficiency
  • Two out-of-phase driver stages for synchronous rectification and active clamps
  • ROHS-compliant, 24-pin, 4x4 mm QFN
Parametrics
Name
Value
Supported Outputs
1
Minimum Input Voltage (V)
7
Maximum Input Voltage (V)
80
Minimum Output Voltage (V)
0.2
Maximum Output Voltage (V)
80
PFM, Discontinuous, Hyperlight load, or Skip Mode
False
Operating Frequency (Hz)
100-1000kHz

Documents

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Data Sheets

  
744KB

Development tools data is currently unavailable.

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
LX7309ILQ-TR
0.000000
0.000000
24
VQFN
4x4x1.0mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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