RPL-3.0 datasheet(3/8 Pages) RECOM

3 / 8 page

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REV.: 0/2021

I-3

DC/DC Converter

Specifications

RPL-3.0

Series

CTRL OPERATING CONDITIONS (V

IN= 12VDC, TJ= -40°C to +125°C, unless otherwise noted, typical values are at TJ= +25°C)

Parameter

Symbol

Condition

Min.

Typ.

Max.

CTRL rising threshold

VCTRL_RISING

1.1VDC

1.2VDC

1.3VDC

CTRL falling threshold

VCTRL_FALLING

0.96VDC

1VDC

1.04VDC

PROTECTIONS

Parameter

Symbol

Condition

Min.

Typ.

Max.

Over current Limitation

LLimit1

current monitor via internal MOSFET R

DS(on)

3.3A

3.9A

OVP threshold

VOVP

if VFB is greater than VOVP, for tOVP, device will enter hiccup mode

110%

115%

120%

OVP hysteresis

disabled during soft start

Over voltage delay

tOVP

if VFB is greater than VOVP, for tOVP, device will enter hiccup mode

2µs

Output pin OVP

VOVP FB > 115%

5.7VDC

6VDC

6.3VDC

Absolute OVP hysteresis

50mV

POWER GOOD OPERATING CONDITIONS (V

IN= 12VDC, TJ= -40°C to +125°C, unless otherwise noted, typical values are at TJ= +25°C)

Parameter

Symbol

Condition

Min.

Typ.

Max.

OV rising threshold

VFB

PGOVHI

fault

110%

115%

120%

OV falling threshold

VFB

PGOVLO

good

110%

UV rising threshold

VFB

PGUVHI

good

85%

90%

95%

UV falling threshold

VFB

PGUVLO

fault

80%

Sink current capability

VPG

sinkcurrent = 4mA

0.4VDC

0.6VDC

THERMAL OPERATING CONDITIONS (V

IN= 12VDC, TJ= -40°C to +125°C, unless otherwise noted, typical values are at TJ= +25°C)

Parameter

Symbol

Condition

Min.

Typ.

Max.

Operating Junction Temperature

-40°C

+125°C

Thermal Resistance (6)

Rth

junction to ambient

junction to case

65K/W

30K/W

Thermal shutdown

hysteresis

150°C

20°C

Notes:

Note6: Tested with RECOM evaluation module: RPL-3.0-EVM-1

OUTPUT VOLTAGE SETTING

The external resistor divider sets the output voltage. Choose the R1 resistance. R2 can be estimated with Equation:

Where VOUT is the output voltage. The output voltage feedback gain is determined by:

To stabilize the system and optimize the load transient response, place a feed-forward capacitor (CFF) in parallel with R1. Upper table shows the values of

feedback resistors and feed-forward capacitors for common output voltages.

Table below lists recommended resistor values for common Vout:

Feedback Network

CFF

VOUT

VOUT [V] R1 [kW] R2 [kW] CFF [pF] COUT [pF]

187

1.2

93.1

1.5

53.6

1.8

37.4

2.5

3.3

8.87

Setting the Output Voltage

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Setting the Output Volatge

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