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AZ3844

Features: · Robust VREF Line/Load Regulation Low Line Regulation : 4mV Low Load Regulation : 4mV· High Stability of Reference Voltage over a Full Temperature Range: 0.2mV/ oC· Operating Frequency up to 500KHz· High PWM Frequency Stability over a Full Temperature Range: 2.5%· High PWM Frequency Sta...

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SeekIC No. : 004293398 Detail

AZ3844: Features: · Robust VREF Line/Load Regulation Low Line Regulation : 4mV Low Load Regulation : 4mV· High Stability of Reference Voltage over a Full Temperature Range: 0.2mV/ oC· Operating Frequency up...

AZ3844 Data Sheet

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Part Number:
AZ3844
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: 2024/11/24

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Product Details

Description



Features:

· Robust VREF Line/Load Regulation Low Line Regulation : 4mV Low Load Regulation : 4mV
· High Stability of Reference Voltage over a Full Temperature Range: 0.2mV/ oC
· Operating Frequency up to 500KHz
· High PWM Frequency Stability over a Full Temperature Range: 2.5%
· High PWM Frequency Stability under a Full Supply Voltage Range: 0.2%
· Accurate Over-temperature Protection with Hysteresis
· UVLO with Hysteresis


Application

· Off-line Converter
· DC-DC Converter
· Voltage Adapter
· CRT Monitor Power Supply
· Desktop Power Supply
· DVD/STB Power Supply


Pinout

Connection Diagram


Specifications

Parameter Symbol Value Unit
Supply Voltage Vcc 30 V
Output Current Io 1 A
Analog Inputs (8-pin: pin2,3, 14-pin: pin3,5) V(ANA) -0.3 to 6.3 V
Error Amp Output Sink Current ISINK(E.A) 10 mA
Power Dissipation at TA< 25 oC (DIP-8) PD (Note 3) 1000 mW
Power Dissipation at TA<25 oC (SOIC-8) PD (Note 3) 460 mW
Power Dissipation at TA<25 oC (SOIC-14) PD (Note 3) 725 mW
Storage Temperature Range TSTG -65 ~+150 oC
Lead Temperature (Soldering, 10sec) TLEAD +300 oC



Description

The AZ3842/3/4/5 are high performance fixed frequency current-mode PWM controller series.

The AZ3842/3/4/5 are optimized for off-line and DC-DC converter applications with minimum external components. They feature under-voltage lockout (UVLO) circuit for low start-up current, trimmed oscillator for precise duty cycle control, current sense comparator providing maximum current limiting and a totem pole output stage for increasing output current. In addition, these ICs also feature accurate protection against over-temperature, over-current and maximal output power.

The AZ3842 and AZ3844 have UVLO thresholds of 15.5V(on) and 10V(off); The corresponding thresholds for AZ3843 and AZ3845 are 8.4 V(on) and 7.8V(off). The AZ3842 and AZ3843 can operate approaching 100% duty cycle; AZ3844 and AZ3845 can operate from zero to 50% duty cycle.

The AZ3842/3/4/5 are available in 3 packages: SOIC-8, DIP-8 and SOIC-14.




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