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SG3846

PWM Controller, Current Mode PWM, Dual Sink/SourceOutputs, 8-40V -55°C to 125°C

Status: In Production

Features:

  • Automatic Feed-forward Compensation
  • Programmable Pulse by Pulse Current Limiting
  • Automatic Symmetry Correction in Push-pull Configuration
  • Enhanced Load Response Characteristics
  • Parallel Operation Capability for Modular Power Systems
  • Differential Current Sense Amplifier with Wide Common-mode Range - Double Pulse Suppression
  • 200mA Totem-pole Outputs
  • ± 1% Bandgap Reference
  • Under-voltage Lockout
  • Soft-start and Shutdown Capability
  • 500kHz Operation
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The SG1846 family of control ICs provides the required features to implement Fixed Frequency, Current mode control schemes while maintaining a minimum external parts count. The advanced performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include, inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel “power modules” while maintaining equal current sharing.
Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart, or latch the supply off.
Other features include fully latched operation, double-pulse suppression, dead-time adjust capability, and a ±1% trimmed bandgap reference.

Additional Features
    • Automatic Feed-forward Compensation
    • Programmable Pulse by Pulse Current Limiting
    • Automatic Symmetry Correction in Push-pull Configuration
    • Enhanced Load Response Characteristics
    • Parallel Operation Capability for Modular Power Systems
    • Differential Current Sense Amplifier with Wide Common-mode Range - Double Pulse Suppression
    • 200mA Totem-pole Outputs
    • ± 1% Bandgap Reference
    • Under-voltage Lockout
    • Soft-start and Shutdown Capability
    • 500kHz Operation
Parametrics
Name
Value
Regulator Type
HI Rel Switching Regulators
Configuration
Current Mode PWMs
Supported Topology
Push-pull, Single ended,Buck
Supported Output
2
Minimum Input Voltage (V)
8
Maximum Input Voltage (V)
40
Output Current (mA) Max
100
Maximum Frequency (kHz)
500
Operating Temperature Range (°C)
0 to 70
Vref (V)
5.1
UVLO
Yes
Current Limit
Yes
Operating Temp Range
to
Quiescent Current (mA) typ
17

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Dimension
Solder Composition
JEDEC Indicator
RoHS
China EFUP
SG3846DW
0.438000
0.765957
16
SOIC
.300In
Matte Tin
e3
SG3846N
1.112700
1.833333
16
PDIP
.300in
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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