Planar Transformer

Document 426

Document 426 Revised 05/10/07

For Maxim MAX5069A

PWM Controller

8

3

2

1

4

5

6

10

Pri

Sec

Aux

0.800

20,32

Recommended

Land Pattern

0.250

6,35

0.095

2,41

Ø 0.110

2,79

Ø 0.080

2,03

0.360

9,14

max

0.810

20,57

max

0.920

23,37

max

0.006 /0,15

1

10

6

5

1

2

3

4

5

6

8

10

Dot indicates pin 1

Input

Output

Output

Primary

Leakage

Part

Output

voltage

voltage

current

DCR max

power (W)

range (V)

nom (V)

(A peak)

min (µH)

max (µH)

(mOhms)

pri:sec pri:aux

B0860-CL_

180

36 – 72

12

15

187.0

0.25

Pri: 38.0

10:4

10:3

Sec: 4.0

Aux: 120.0

1. When ordering, specify a

packaging code:

B0860-CLD

Packaging: D = 13

″ machine ready reel. EIA-481 embossed plastic

tape (200per full reel).

B = Less than full reel. In tape, but not machine ready.

To have a leader and trailer added ($25 charge), use

code letter D instead.

The B0860-C is approved by Maxim for use with their

MAX5069A high-frequency, current-mode, pulse-width

modulation (PWM) controller.

This planar transformer can be used in push-pull, half-

bridge and full-bridge topologies. It is ideal for use in

high-current, isolated or nonisolated power supply ap-

plications. It offers high efficiency in a low-profile pack-

age and features split primary and secondary windings,

a separate auxiliary winding and 1500 Vdc primary to

secondary isolation.

Coilcraft’s

Planar Prototyping Kit C356 was used to de-

sign this transformer. No tooling or additional parts were

required. To order the kit, contact Coilcraft or purchase

on-line at

http://order.coilcraft.com.

Free evaluation samples of B0860-C are available by

contacting Coilcraft or by visiting

www.coilcraft.com.

Weight:

11.8 g

Terminations: Matte tin over nickel over brass

Tape and reel: 200/13

″ reel 44 mm tape width

2. Inductance measured on an Agilent/HP 4284 between pins 2 and 4 at 250

kHz, 0.1 Vrms, 0 Adc.

3. Leakage inductance measured between pins 2 and 4 at 250 kHz, 0.1Vrms,

0 Adc with pins 6, 8 and 10 shorted.

4. Turns ratio is with the primary windings and secondary windings connected

in series.

5. Storage and ambient operating temperature range: –40°C to +85°C.

6. Electrical specifications at 25°C.