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MC44604

Features: Current Mode Controller• Operation Up to 250 kHz Output Switching Frequency• Inherent Feed Forward Compensation• Latching PWM for CyclebyCycle Current Limiting• Oscillator with Precise Frequency ControlHigh Flexibility• Externally Programmable Reference Curr...

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SeekIC No. : 004415996 Detail

MC44604: Features: Current Mode Controller• Operation Up to 250 kHz Output Switching Frequency• Inherent Feed Forward Compensation• Latching PWM for CyclebyCycle Current Limiting• Osc...

MC44604 Data Sheet

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Part Number:
MC44604
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

Current Mode Controller
• Operation Up to 250 kHz Output Switching Frequency
• Inherent Feed Forward Compensation
• Latching PWM for CyclebyCycle Current Limiting
• Oscillator with Precise Frequency Control

High Flexibility
• Externally Programmable Reference Current
• Secondary or Primary Sensing
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis

Safety/Protection Features
• Overvoltage Protection Facility Against Open Loop
• Protection Against Short Circuit on Oscillator Pin
• Fully Programmable Foldback
• SoftStart Feature
• Accurate Maximum Duty Cycle Setting
• Demagnetization (Zero Current Detection) Protection
• Internally Trimmed Reference

GreenLineTM ControllerTM
• Low StartUp and Operating Current
• Pulsed Mode Standby for Low Standby Losses
• Low dV/dT for Low EMI


Pinout

Connection Diagram


Specifications

Rating
Pin #
Symbol
Value
Unit
Total Power Supply and Zener Current
(ICC + IZ)
30
mA
Output Supply Voltage with Respect to Ground
2
1
VC
VCC
18
V
Output Current*
Source
Sink
3
IO(Source)
IO(Sink)
-750
750
mA
Output Energy (Capacitive Load per Cycle)
W
5.0
J
SoftStart
11
VSS
0.3 to 2.2
V
Clamp Error Amp Input
12
VCLEA
0.3 to 4.5
V
Foldback Input, Standby Management
0.3 to VCC + 0.3
V
Overvoltage Protection, Current Sense Input, Rref, Error Amp Input,
Error Amp Output, CT, Standby Current Set
Vin
0.3 to 5.5
V
Demagnetization Detection Input Current
Source
Sink
8
Idemagib (Source)
Idemagib (Sink)
4.0
10
mA
Error Amplifier Output Sink Current
13
IE/A (Sink)
20
mA
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation at TA = 85  
Thermal Resistance, JunctiontoAir
PD
RJA
0.6
100
W

/W
Operating Junction Temperature
TJ
150
Operating Ambient Temperature  
TA
 25 to +85
*Maximum package power dissipation must be observed.


Description

The MC44604 is an enhanced high performance controller that is specifically designed for offline and dctodc converter applications. Its high current totem pole output is ideally suited for driving a power MOSFET.

The MC44604 is an evolution of the MC44603A. Like the MC44603A, the MC44604 has been optimized to operate with
universal ac mains voltage from 80 V to 280 V. It also offers enhanced safety and reliable power management thanks to its protection features (foldback, overvoltage detection, softstart, accurate demagnetization detection).

In addition, the MC44604 offers a new efficient way to reduce the standby operating power by means of a socalled pulsed modestandby operation of the converter, significantly reducing the converter consumption in standby mode.




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