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NCP1561

Features: • Internal High Voltage Startup Regulator• Minimum Operating Voltage of 21.5 V• Voltage or Current−Mode Control Capability• Single Resistor Oscillator Frequency Setting• Adjustable Frequency up to 250 kHz• Fast Line Feedforward• Line Underv...

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SeekIC No. : 004432979 Detail

NCP1561: Features: • Internal High Voltage Startup Regulator• Minimum Operating Voltage of 21.5 V• Voltage or Current−Mode Control Capability• Single Resistor Oscillator Frequen...

NCP1561 Data Sheet

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Part Number:
NCP1561
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:

• Internal High Voltage Startup Regulator
• Minimum Operating Voltage of 21.5 V
• Voltage or Current−Mode Control Capability
• Single Resistor Oscillator Frequency Setting
• Adjustable Frequency up to 250 kHz
• Fast Line Feedforward
• Line Undervoltage Lockout
• Dual Mode Overcurrent Protection
• Programmable Maximum Duty Cycle Control
• Maximum Duty Cycle Proportional to Line Voltage
• Programmable Soft−Start
• Precision 5.0 V Reference


Application

• 48 V Telecommunication Power Converters
• Industrial Power Converters
• 42 V Automotive Systems


Pinout

Connection Diagram


Specifications

Rating Symbol Value Unit
Input Line Voltage Vin −0.3 to 150 V
Auxiliary Supply Voltage VAUX −0.3 to 16 V
Auxiliary Supply Input Current IAUX 35 mA
OUT1 and OUT2 Voltage VOUT −0.3 to (VAUX + 0.3 V) V
OUT1 and OUT2 Output Current IOUT 10 mA
5.0 V Reference Voltage VREF −0.3 to 6.0 v
5.0 V Reference Output Current IREF 6.0 mA
All Other Inputs/Outputs Voltage VIO −0.3 to VREF v
All Other Inputs/Outputs Current IIO 10 mA
Operating Junction Temperature TJ −40 to 150 °C
Storage Temperature Range Tstg −55 to 150 °C
Power Dissipation at TA = 25°C PD 0.77 w
Thermal Resistance, Junction−to−Ambient RqJA 130 °C/w
1. Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not
implied, damage may occur and reliability may be affected.
A. This device series contains ESD protection and exceeds the following tests:
Pin 1: Pin 1 is the HV start−up of the device and is rated to the max rating of the part, or 150 V.
Machine Model Method 150 V.
Pins 2−16: Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 200 V.


Description

The NCP1561 Push−Pull PWM controller contains all the features and flexibility needed to implement high efficiency dc−dc converters using voltage or current−mode control. This device can be configured in any dual ended topology such as push−pull or half−bridge. It can also be used for forward topologies requiring a 50% maximum duty cycle. This device is ideally suited for 48 V telecom, 42 V automotive systems and 12 V input applications.

The NCP1561 cost effectively reduce system part count by incorporating a high voltage startup regulator, line undervoltage detector, single resistor oscillator setting, dual mode overcurrent protection, soft−start and single resistor feedforward ramp generator. The oscillator frequency can be adjusted up to 250 kHz.




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