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TD3843A

Features: • Low Start Up Current• Maximum Duty Clamp• UVLO With Hysteresis• Operating Frequency Up To 500KHzPinoutSpecifications R ating S ymbol Value Unit Bias and Driver Voltages (Zero S eries Impedance, see also Total Device spec) VCC, VC 30 V Total Powe...

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SeekIC No. : 004515812 Detail

TD3843A: Features: • Low Start Up Current• Maximum Duty Clamp• UVLO With Hysteresis• Operating Frequency Up To 500KHzPinoutSpecifications R ating S ymbol Value Unit Bias an...

TD3843A Data Sheet

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Part Number:
TD3843A
Supply Ability:
5000

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

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Product Details

Description



Features:

• Low Start Up Current
• Maximum Duty Clamp
• UVLO With Hysteresis
• Operating Frequency Up To 500KHz


Pinout

Connection Diagram


Specifications

R ating S ymbol Value Unit
Bias and Driver Voltages (Zero S eries Impedance, see also Total Device spec) VCC, VC 30 V
Total Power S upply and Zener Current (ICC + IZ) 30 mA
Output Current, S ource or S ink (Note 1) IO 1.0 A
Output E nergy (Capacitive Load per Cycle) W 5.0 mJ
Current S ense and Voltage Feedback Inputs Vin - 0.3 to + 5.5 V
E rror Amp Output S ink Current IO 10 mA
Power Dis s ipation and Thermal Characteris tics
    Dis s ipation @ TA = 25°C
         Maximum Power
        Thermal R es is tance, Junction-to-Air
N S uffix, P las tic P ackage
       Maximum Power Dis s ipation @ TA = 25°C
     Thermal R es is tance, Junction-to-Air		 PD
R QJA
PD
R QJA		 862
145
1.25
100		 mW
°C/W
W
°C/W
Operating Junction Temperature TJ + 150 °C
Operating Ambient Temperature TA 0 to + 70 °C
S torage Temperature R ange Ts tg - 65 to + 150 °C

1. Maximum P ackage power dis s ipation limits mus t be observed.


Description

The TD3843A are fixed frequency current-mode PWM controller. They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components.

These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier. current sensing comparator, and a high current totempole output Ideally suited for driving a power MOSFET. Protection circuity Includes built under-voltage lockout and current limiting. The TD3843A have UVLO thresholds of 16V (on) and 10V (off) The TD 3843A and TD3845A are 8.4V (on) and 7.6V (off) The TD3842A and TD3843A can operate within 100% duty cycle.The TD3844A and TD3845A can operate with 50% duty cycle.




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