PPM-Series – PPM40-H-xxELF – Single Output - Plastic Case

Specification can change without a notice – We accept no liability for any inaccuracy or printing errors.

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App Notes:

Trim Application & Trim Calculation

Application circuit for TRIM

(Part in broken line is the interior of models)

0V

Trim

+Vot

0V

Trim

+Vot

Trim up

Trim down

Formula for resistance of Trim

up:

a=

Vref

Vot-Vref

R =

T

R -a

2

down:

a=

Vref

Vot-Vref

R =

T

R -a

1

Note: Value for R1, R2, R3, and Vref refer to the following table.

a: User-defined parameter, no actual meanings.

Vo(V)

Resistance

3.3

5V

12V

24V

R1(K )

2

3.3

3.83

8.66

R2(K )

1.2

3.3

1

1

R3(K )

1

1

1

1

Vref(V)

1.24

2.5

2.5

2.5

Vot(V)

Output voltage of Trim, variation ≤ ±10%

EMC

EMI

EN55022, Class B

EMS

ESD IEC/EN 61000-4-2 ±6kV/8kV

perf. Criteria B

RS IEC/EN 61000-4-3 10V/m

perf. Criteria A

perf. Criteria B

CS IEC/EN 61000-4-6 10 Vr.m.s.

perf. Criteria A

PFM IEC/EN 61000-4-8 10A/m

perf. Criteria A

perf. Criteria B

Parallel Lines Measure

AC-DC

+Vo

-Vo

FU SE

L

N

2 5 . 4 mm

2 5 . 4 mm

C1

C2

1 2 . 7 mm

C o p p e r sh e e t

C o n n e ct

Oscillo g ra p h Pro b e

L o a d

L

N

Note: C1: 1µF (Ceramic capacitor) C2: 10µF (Electrolytic capacitor)