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LND3844B

Features: • Low start-up and operating Current• High Current Totem Pole Output• Undervoltage Lockout with Hysterisis• Operating Frequency up to 500KHZPinoutSpecificationsSupply voltage (low impedance source) Vcc............. 30 VOutput Current IO ..............................

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SeekIC No. : 004397800 Detail

LND3844B: Features: • Low start-up and operating Current• High Current Totem Pole Output• Undervoltage Lockout with Hysterisis• Operating Frequency up to 500KHZPinoutSpecificationsSupp...

LND3844B Data Sheet

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Part Number:
LND3844B
Supply Ability:
5000

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

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Product Details

Description



Features:

• Low start-up and operating Current
• High Current Totem Pole Output
• Undervoltage Lockout with Hysterisis
• Operating Frequency up to 500KHZ


Pinout

Connection Diagram


Specifications

Supply voltage (low impedance source) Vcc............. 30 V
Output Current IO ...................................................±1 A
Input Voltage (Analog Inputs pins 2,3) VI... -0.3 to 5.5 V
Error Amp Output Sink Current ISINK(E.A) ............10 mA
Power Dissipation (TA =25°C) PO........................... 1 W
Storage Temperature Range Tstg ..............-65 to 150
Lead Temperature ( soldering 5 sec.) TL.............. 260


Description

The LND3844B and LND3842A /43A/44A/45A are fixed frequency current mode PWM controllers. They are specially designed for OFF-line and DC to DC converter applications with a minimal of external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator. Protection circuitry includes undervoltage lockout and current limiting. The LND3843B, A and LND3844B, A have UVLO thresholds of 16V(on) and 10 V (off). The corresponding thresholds for the LND3843B, A/ 45B,A are 8.4 V (on) and 7.6(off). The LND3842B,A and LND3843B, A can operate within 100% duty cycle. The LND3844B, A and LND3845B, A can operate within 50% duty cycle.

The LND384XB has Start-Up current of .45mA(typ).
The LND384XA has Start-Up current of .17mA(typ).




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