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LX1555

Features: ULTRA-LOW START-UP CURRENT (150µA typ.)TRIMMED OSCILLATOR DISCHARGE CURRENT (±2% typ.) INITIAL OSCILLATOR FREQUENCY BETTER THAN ±4% OUTPUT PULLDOWN DURING UVLO PRECISION 2.5V REFERENCE (±2% max.) CURRENT SENSE DELAY TO OUTPUT (150ns typ.) AUTOMATIC FEED FORWARD COMPENSATIONPULSE-B...

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SeekIC No. : 004403413 Detail

LX1555: Features: ULTRA-LOW START-UP CURRENT (150µA typ.)TRIMMED OSCILLATOR DISCHARGE CURRENT (±2% typ.) INITIAL OSCILLATOR FREQUENCY BETTER THAN ±4% OUTPUT PULLDOWN DURING UVLO PRECISION 2.5V REFERE...

LX1555 Data Sheet

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Part Number:
LX1555
Supply Ability:
5000

Price Break

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

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Upload time: 2024/11/9

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Product Details

Description



Features:

ULTRA-LOW START-UP CURRENT (150µA typ.)
TRIMMED OSCILLATOR DISCHARGE CURRENT (±2% typ.)
INITIAL OSCILLATOR FREQUENCY BETTER THAN ±4%
OUTPUT PULLDOWN DURING UVLO
PRECISION 2.5V REFERENCE (±2% max.)
CURRENT SENSE DELAY TO OUTPUT (150ns typ.)
AUTOMATIC FEED FORWARD COMPENSATION
PULSE-BY-PULSE CURRENT LIMITING
ENHANCED LOAD RESPONSE CHARACTERISTICS
UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS
DOUBLE PULSE SUPPRESSION
HIGH CURRENT TOTEM POLE OUTPUT (±1Amp peak)
500kHz OPERATION


Application

ECONOMY OFF-LINE FLYBACK OR FORWARD CONVERTERS
DC-DC BUCK OR BOOST CONVERTERS
LOW COST DC MOTOR CONTROL


Pinout

Connection Diagram


Specifications

Supply Voltage (Low Impedance Source) ................................................................... 30V
Supply Voltage (ICC < 30mA) ......................................................................... Self Limiting
Output Current .......................................................................................................... ±1A
Output Energy (Capacitive Load) ................................................................................ 5µJ
Analog Inputs (Pins 2, 3) ........................................................................... -0.3V to +6.3V
Error Amp Output Sink Current ............................................................................... 10mA
Power Dissipation at TA = 25°C (DIL-8) ...................................................................... 1W
Operating Junction Temperature
Ceramic (Y Package) ............................................................................................ ..150°C
Plastic (M, DM, D, PW Packages) ............................................................................ 150°C
Storage Temperature Range ..................................................................-65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) ............................................................ 300°C


Description

The LX1555 family of ultra-low start- current (250µA max.), current mode control IC's offer new levels of energy efficiency for offline converter applications. They are ideally optimized for personal computer and CRT power supplies although they can be used in any number of off-line applications where energy efficiency is critical.
Coupled with the fact that the LX1555 series requires a minimal set of external components, the series offers an excellent value for cost conscious consumer applications.




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