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No-Opto Flyback Transformer

for MAXIM MAX17690

RoHS compliant
The ZB1313 flyback transformer is designed to work with the MAX17690 60 V, no-opto isolated flyback controller from Maxim. It has no auxiliary winding and offers the greatest efficiency, lowest cost, and smallest size for synchronous isolated DC-DC power converters. The ZB1313 operates with an 18 – 38 V input voltage range and generates an output at 24 V / 0.7 A, with a peak efficiency of up to 90.6% at full load. The part has a maximum height of just 7.4 mm, significantly lower than other parts recommended for the same chipset.
  • Designed for use with Maxim 60 V No-opto isolated flyback controller MAX17690
  • High efficiency, 90.6% in MAXIM reference design circuit
  • Operates at 163 kHz with 18 – 38 V input
  • 1500 Vrms, one minute isolation (hipot) between primary and secondary

Buy Now:
Count Unit price
1 $6.62
100 $5.41
200 $4.05
400 $2.43
1200 $1.89
2400 $1.63
5200 $1.49

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

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Typical Application

Works with MAXIM MAX17690

Input Voltage Output Power Fsw
18 V 38 V 24 V , 0.7 A 16.8 W 163 kHz


Electrical specifications at 25°C.

Part number
(Hover for schematics)
at 0A (µH) 1
(Tolerance: ±10%)
min at   5 A (µH) 2
DCR max (Ω) Leakage
max (µH) 3
Turns Ratio 4 Current (A) Isolation
Voltage (Vrms) 5
Pri Sec Pri : Sec
ZB1313-CLD 10.5 9.45 0.0611 0.0647 0.18 1 : 1.27 5.0 1500
  1. Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Adc.
  2. Minimum inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 5 Adc.
  3. Leakage inductance is for the primary winding with the secondary windings shorted.
  4. Turns ratios are with the primary and secondary windings connected in parallel.
  5. 1500 Vrms, one minute isolation (hipot) between primary and secondary.


  • RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost.


  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (400 parts per full reel).
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C
Maximum part temperature:
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Performance curves

L vs Current


Connect pin 1 to 2, pin 5 to 6, pin 7 to 8 to 9,
and pin 10 to 11 to 12 on PC board.

Physical characteristics



Tape and Reel specification


Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_c.gif
400 330 100 13 38,4 32,4 32 20 4 2 7,6 0,4

General specification

Core Material:
2.7 – 3.0 g
400 per 13″ reel Plastic tape: 32 mm wide, 0.4 mm thick, 20 mm pocket spacing, 7.6 mm pocket depth


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.

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