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CS51021A

Features: • 75 mA Max. Startup Current• Fixed Frequency Current Mode Control• 1.0 MHz Switching Frequency• Undervoltage Protection Monitor• Overvoltage Protection Monitor with Programmable Hysteresis• Programmable Dual Threshold Overcurrent Protection with Delay...

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SeekIC No. : 004316491 Detail

CS51021A: Features: • 75 mA Max. Startup Current• Fixed Frequency Current Mode Control• 1.0 MHz Switching Frequency• Undervoltage Protection Monitor• Overvoltage Protection Monit...

CS51021A Data Sheet

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Part Number:
CS51021A
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

• 75 mA Max. Startup Current
• Fixed Frequency Current Mode Control
• 1.0 MHz Switching Frequency
• Undervoltage Protection Monitor
• Overvoltage Protection Monitor with Programmable Hysteresis
• Programmable Dual Threshold Overcurrent Protection with Delayed Restart
• Programmable Soft Start
• Accurate Maximum Duty Cycle Limit
• Programmable Slope Compensation
• Leading Edge Current Sense Blanking
• 1.0 A Sink/Source Gate Drive
• Bidirectional Synchronization (CS51021A/3A)
• 50 ns PWM Propagation Delay
• 100 mA Max Sleep Current (CS51022A/4A)


Pinout

Connection Diagram


Specifications

Rating
Value
Unit
Power Supply Voltage, VCC
0.3, 20
V
Driver Supply Voltage, VC
0.3, 20
V
SYNC, SLEEP, RTCT, SOFT START, VFB, SLOPE, ISENSE, UV, OV, ISET (Logic Pins)
0.25 to VREF
V
Peak GATE Output Current
1.0
A
Steady State Output Current
±0.2
A
Operating Junction Temperature, TJ
150
°C
Storage Temperature Range, TS
65 to +150
°C
ESD (Human Body Model)
2.0
KV
Lead Temperature Soldering:Reflow:(SMD styles only)(Note1)
230 peak
°C
1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.


Description

The CS51021A/2A/3A/4A Fixed Frequency PWM Current Mode Controller family provides all necessary features required for ACDC or DCDC primary side control. Several features are included eliminating the additional components needed to implement them externally. In addition to low startup current (75 mA) and high frequency operation capability, the CS51021A/2A/3A/4A family includes overvoltage and undervoltage monitoring, externally programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5.0 V reference. The CS51021A and CS51023A feature bidirectional synchronization capability, while the CS51022A and CS51024A offer a sleep mode with 100 mA maximum IC current consumption. The CS51021A/2A/3A/4A family is available in a 16 lead narrow body SO package.




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