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NA6264 Flyback Transformer

for Texas Instruments PMP7899

RoHS compliant
  • Developed for Texas Instruments PMP7899 Reference Design for Non-Synchronous Flyback Converter with an Isolated Output
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Typical Application

Works with Texas Instruments PMP7899

Input Voltage Output 1 Power Fsw
Sec Aux
8 V 18 V 48 V , 1 A 9 V , 0.02 A 48 W 300 kHz

Specifications

Electrical specifications at 25°C.

Part number
(Hover for schematics)
Inductance
at 0A (µH) 2
(Tolerance: ±15%)
Inductance
min at   16.5 A (µH) 3
DCR max (Ω) 4 Leakage
Inductance
max (µH) 5
Turns Ratio Isolation
Voltage (Vrms) 6
Pri Sec Aux Pri : Sec : Aux
NA6264-AL 2.56 2.18 0.0033 0.11 0.13 0.06 1 : 6 : 1.5 1500
Notes
  1. Output is for the secondary. Aux winding output is 9 V, 20 mA.
  2. Inductance is for the primary, measured with the windings connected in parallel at 300 kHz, 0.3 Vrms.
  3. Ipk is the peak primary current drawn at minimum input voltage.
  4. DCR is measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  5. Leakage inductance if for the primary and is measured with the windings connected in parallel with the secondary windings shorted.
  6. 1500 Vrms, one minute isolation (hipot) from the primary and aux windings to the secondary

Termination:

  • RoHS-compliant  260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations. Other terminations available at additional cost.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +125°C
Storage temperature range:
Component: –40°C to +125°C.
Tray packaging: –40°C to +80°C
Maximum part temperature:
+125°C (ambient + temp rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Schematics

na6264s.gif

Primary windings to be
connected on the PC board.

Physical characteristics

na6264d.gif


dims_inches_mm-(3).gif

General specification

Core Material:
Ferrite
Weight:
25.9 g

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.