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HA3994-AL Flyback Transformer

for LT3751

RoHS compliant
  • Developed for Linear Technology LT3751 Capacitor Charger Controller
Buy Now:
Count Unit price
1 $4.48
240 $3.58
480 $3.11
1200 $2.71
2400 $2.32
4800 $2.12

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
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Typical Application

Works with ADIPowerbyLinear LT3751

Input Voltage Output Fsw
Sec1 Sec2 Sec3
5 V 24 V 5 V , 3.6 A 15 V , 1.2 A -15 V , 1.2 A 100 kHz

Specifications

Electrical specifications at 25°C.

Part number Inductance
at 0A (µH) 1
(Tolerance: ±10%)
Inductance
min at   5 A (µH)
DCR max (Ω) 2 Leakage
Inductance
max (µH) 3
Turns Ratio 4 Volt-time
product (V-µs)
Isolation
Voltage (Vrms) 5
Pri Sec1 Sec2 Sec3 Pri : Sec1 : Sec2 : Sec3
HA3994-AL 7.50 6.75 0.018 0.020 0.031 0.031 0.22 1 : 0.5 : 1.5 : 1.5 37.5 1500
Notes
  1. Inductance is measured at 100 kHz, 0.1 Vrms.
  2. DCR for the primary is with the windings connected in parallel.
  3. Leakage inductance is for both windings of the primary with the secondary windings shorted.
  4. Turns ratios are with the primary windings connected in parallel.
  5. 1500 Vrms, one minute isolation from primary to secondary windings.

Termination:

  • RoHS-compliant. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

Packaging:

  • L = RoHS compliant tin-silver over tin over nickel over phos bronze
  • Special order, added cost: T = RoHS tin-silver-copper (95.5/4/0.5) or
  • S = non-RoHS tin-lead (63/37).
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +85°C.
Tray packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

ha3994s.gif

Primary windings to be connected
in parallel on the PC board

Physical characteristics

ha3994d.gif


dims_inches_mm-(1).gif

General specification

Core Material:
Ferrite
Weight:
25.0 g
Packaging:
24 per tray

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 with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf.