MC33025DWG
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onsemi MC33025DWG

Manufacturer No:
MC33025DWG
Manufacturer:
onsemi
Package:
Bulk
Description:
IC OFFLINE SW HALF-BRDG 16SOIC
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The MC33025DWG, produced by onsemi, is a high-speed, fixed-frequency, double-ended pulse width modulator (PWM) controller. This integrated circuit is optimized for high-frequency operation and is specifically designed for off-line and DC-to-DC converter applications. It offers a cost-effective solution with minimal external components, making it an ideal choice for power supply designs. The MC33025DWG features an oscillator, a temperature-compensated reference, a wide bandwidth error amplifier, a high-speed current sensing comparator, and dual high-current totem pole outputs suitable for driving power MOSFETs.

Key Specifications

Characteristic Symbol Min Typ Max Unit
Power Supply Voltage VCC - - 30 V
Output Driver Supply Voltage VC - - 25 V
Output Current, Source or Sink IO 0.5 - 2.0 A
Reference Output Voltage Vref 5.05 5.1 5.15 V
Startup Threshold (VCC Increasing) Vth(on) 8.8 9.2 9.6 V
UVLO Hysteresis Voltage (VCC Decreasing After Turn-On) VH 0.4 0.8 1.2 V
Operating Junction Temperature TJ - - 150 °C
Operating Ambient Temperature TA -40 - 105 °C
Storage Temperature Range Tstg -55 - 150 °C

Key Features

  • High-speed, fixed-frequency operation
  • Dual high-current totem pole outputs for driving power MOSFETs
  • Wide bandwidth error amplifier
  • Temperature-compensated reference with short circuit protection
  • 50 ns propagation delay to outputs
  • Fully-latched logic with double pulse suppression
  • Latching PWM for cycle-by-cycle current limiting
  • Input and reference undervoltage lockouts with hysteresis
  • Soft-start capability with hiccup mode recovery for output short circuits
  • Separate pins for VC and Power Ground to reduce switching transient noise

Applications

The MC33025DWG is designed for use in off-line and DC-to-DC converter applications. It is particularly suitable for:

  • Switch-mode power supplies
  • High-frequency DC-to-DC converters
  • Power factor correction circuits
  • Motor control and drive systems
  • Other high-power, high-frequency switching applications

Q & A

  1. What is the primary function of the MC33025DWG?

    The MC33025DWG is a high-speed, fixed-frequency, double-ended pulse width modulator controller designed for off-line and DC-to-DC converter applications.

  2. What is the maximum power supply voltage for the MC33025DWG?

    The maximum power supply voltage (VCC) is 30 V.

  3. What is the typical reference output voltage of the MC33025DWG?

    The typical reference output voltage (Vref) is 5.1 V.

  4. What is the propagation delay to the outputs of the MC33025DWG?

    The propagation delay to the outputs is typically 50 ns.

  5. Does the MC33025DWG have undervoltage lockout protection?

    Yes, it has input and reference undervoltage lockouts with hysteresis.

  6. What is the purpose of the soft-start feature in the MC33025DWG?

    The soft-start feature helps in gradually increasing the output voltage during startup, preventing large inrush currents and potential damage to the system.

  7. Can the MC33025DWG be used in current mode or voltage mode control?

    Yes, the MC33025DWG can be easily configured for either current mode or voltage mode control.

  8. What is the maximum operating ambient temperature for the MC33025DWG?

    The maximum operating ambient temperature (TA) is 105°C.

  9. Does the MC33025DWG have separate pins for VC and Power Ground?

    Yes, it has separate pins for VC and Power Ground to reduce switching transient noise.

  10. What is the typical output current capability of the MC33025DWG's totem pole outputs?

    The totem pole outputs can source or sink up to ±2.0 A peak drive current.

  11. How does the MC33025DWG handle output short circuits?

    The MC33025DWG features a hiccup mode recovery for output short circuits, which helps in protecting the system during such events.

Product Attributes

Output Isolation:Isolated
Internal Switch(s):No
Voltage - Breakdown:- 
Topology:Half-Bridge
Voltage - Start Up:9.2 V
Voltage - Supply (Vcc/Vdd):8.4V ~ 30V
Duty Cycle:45%
Frequency - Switching:1MHz
Power (Watts):- 
Fault Protection:Current Limiting
Control Features:Frequency Control, Soft Start
Operating Temperature:-40°C ~ 105°C (TA)
Package / Case:16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:16-SOIC
Mounting Type:Surface Mount
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Similar Products

Part Number MC33025DWG MC34025DWG MC33023DWG MC33025DW
Manufacturer onsemi onsemi onsemi onsemi
Product Status Obsolete Obsolete Obsolete Obsolete
Output Isolation Isolated Isolated Isolated Isolated
Internal Switch(s) No No No No
Voltage - Breakdown - - - -
Topology Half-Bridge Half-Bridge Forward Half-Bridge
Voltage - Start Up 9.2 V 9.2 V 9.2 V 9.2 V
Voltage - Supply (Vcc/Vdd) 8.4V ~ 30V 8.4V ~ 30V 8.4V ~ 30V 8.4V ~ 30V
Duty Cycle 45% 45% 90% 45%
Frequency - Switching 1MHz 1MHz 1MHz 1MHz
Power (Watts) - - - -
Fault Protection Current Limiting Current Limiting Current Limiting Current Limiting
Control Features Frequency Control, Soft Start Frequency Control, Soft Start Frequency Control, Soft Start Frequency Control, Soft Start
Operating Temperature -40°C ~ 105°C (TA) 0°C ~ 70°C (TA) -40°C ~ 105°C (TA) -40°C ~ 105°C (TA)
Package / Case 16-SOIC (0.295", 7.50mm Width) 16-SOIC (0.295", 7.50mm Width) 16-SOIC (0.295", 7.50mm Width) 16-SOIC (0.295", 7.50mm Width)
Supplier Device Package 16-SOIC 16-SOIC 16-SOIC 16-SOIC
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount

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