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BCD.00197 Rev AG, 09-Mar-2021

Page 3 of 11

IBX15 Series

Boost Converters

© 2021 Bel Power Solutions & Protection

Electrical Input Data

General conditions:

- T

Table 2: Input data

Model

24IBX15-50-0G

36IBX15-50-0G

Unit

Characteristics

Conditions

min

typ

max

min

typ

max

V

i

Operating input voltage

16.8

160

25.2

160

V

V

i 2s

Temporary input voltage

2 s

12

168

21.3

168

V

i abs

Input voltage limits

2 s, without damage

176

176

∆V

i o

Voltage drop V

V

1

1

I

i

Typical input current

V

8

6

A

C

i

Input capacitance

for surge calculation

4

µF

t

start

Start-up time of V

o

V

500

500

ms

P

i 0

No-load input power

V

1.0

1.5

1.0

1.5

W

P

i SD

Input power with shutdown

V

Input Protection and Fuse

No fuse is incorporated inside the converter. Consequently, an external fuse or a circuit breaker at system level should be installed

to protect against severe defects; see table 3.

Reverse polarity protection is provided by an antiparallel diode across the input, causing the external input fuse or circuit breaker

to trip.

Note: The fuses in table 4 apply to batteries with V

may suit better.

Table 3: Recommended external fuses in the non-earthed input line

Converter model

Fuse type

24IBX15-50-0G

Littlefuse 218, 10 A / 250 VAC, fast

36IBX15-50-0G

Littlefuse 218, 8 A / 250 VAC, fast, or:

Schurter SPT 8 A, 300 VDC

Programmable Undervoltage Lockout PUL

The programmable input undervoltage lockout (PUL, pin 17) should be adjusted adequately in order to limit the input current.

Table 4 shows the values of the resistor R

the resultant maximum input current.

Note: If PUL is connected to Vi–, the converter is disabled (shutdown).

Table 4: Typical values for R

24IBX15-50-0G

36IBX15-50-0G

R

V

R

V

∞

15

∞

23

110

18

100

27

68

20

56

30

43

23

36

34

27

27

27

38