www.recom-power.com

REV.: 0/2023

ECO-4

DC/DC Converter

REC30E-Z

Series

Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)

OUTPUT VOLTAGE TRIMMING

R

up=

k

u*R2

-R3 = k

Ω

R2 - k

u

k

u=

Vref

*R1 = k

Ω

(Vout +

DVout) -Vref

k

d=

(Vout +

DVout) -Vref

*R2 = k

Ω

Vref

k

u=

2.5V

*86k

Ω

=

8k995

Ω

(24V + 2.4V) -2.5V

R

up=

8.995k

Ω * 10kΩ

-73.2k

Ω = 16k4Ω

10k

Ω - 8.995kΩ

R

down=

76.4k

Ω * 86kΩ

-73.2k

Ω = 611k2Ω

86k

Ω - 76.4kΩ

k

d=

[24V +(-2.4V)] -2.5V

*10k

Ω

=

76k4

Ω

2.5V

R

down=

k

d*R1

-R3

= k

Ω

R1 - k

d

Vout

nom

R

1[Ω]

R

2 [Ω]

R

3 [Ω]

V

ref [VDC]

3.3VDC

16k6

10k

52k3

1.25

5VDC

10k

35k7

2.5

12VDC

38k

48k7

15VDC

50k1

64k9

24VDC

86k

73k2

Vout

nom

= nominal output voltage

[VDC]

Vout

set

= trimmed output voltage

[VDC]

DVout

= output voltage change

[%]

V

ref

= reference voltage

[VDC]

R

up

= external trim up resistor

[

Ω]

R

down

= external trim down resistor [

Ω]

R

1, R2, R3 = internal resistors

[

Ω]

k

u

= trim up factor

[ ]

k

d

= trim down factor

[ ]

Trim Up: Vout

set= 26.4VDC

Vout

nom = 24V, DVout = 2.4V (10%)

Trim down: Vout

set= 21.6VDC

Vout

nom = 24V, DVout = -2.4V (-10%)

REGULATIONS

Parameter

Condition

Value

Output Accuracy

±1.0% typ.

Line Regulation

low line to high line, full load

Single

±0.2% typ.

Dual

±0.5% typ.

Load Regulation

0% to 100% load

Single

0.2% typ.

Dual

1.0% typ.

Cross Regulation

asymmetrical load 25% / 100%

±0.5% typ.

Transient Response Recovery Time

25% load step change (75% - 100%)

250µs

PROTECTIONS

Parameter

Type

Value

Short Circuit Protection (SCP)

continuous, auto recovery

Over Load Protection (OLP)

hiccup mode

nom. Vin= 24VDC

170% of rated I

OUT

nom. Vin= 48VDC

190% of rated I

OUT

Over Temperature Protection (OTP)

automatic restart after cool down

115°C

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