DC-DC CONVERTERS

C Class Non-isolated

1

2 YEAR WARRANTY

SIL25C Series

12 Vin single negative output

per Telcordia SR-332

The SIL25C Series is a new high density non-isolated dc-dc converter. The converter has

a wide input range (10.2 Vdc to 13.8 Vdc) and offers a -4.5 Vdc to -5.5 Vdc output voltage

range with a 25 A load. The series offers remote ON/OFF, overtemperature protection and

overcurrent protection as standard. The remote sense feature enables the SIL25C

compensate for voltage drops between the converters output and the load. With full

international safety approvals including EN60950 and UL/cUL60950 the SIL25C reduces

compliance costs and time to market.

NEW Product

File Name: sil25c_12_neg.pdf Rev (02): 16 Dec 2005

International Safety Standard Approvals (pending)

UL/cUL CAN/CSA 22.2 No. TBD

UL60950 File No. TBD

TÜV Product Service (EN60950) Certificate No. TBD

CB report and certificate to TBD

INPUT SPECIFICATIONS (CONTD.)

Turn ON threshold

10 Vdc

Turn OFF threshold

9.5 Vdc

GENERAL SPECIFICATIONS

Efficiency

90%

Switching frequency

Fixed (2 phase) 250 kHz typ. per phase

Approvals and

(See Note 7)

TÜV Product Services

standards (pending)

IEC60950, UL/cUL60950

Material flammability

UL94V-0

Weight

28.3 g (1 oz)

MTBF

Telcordia SR-332

3,000,000 hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating ambient,

-40 ºC to +80 ºC

(See Note 8)

temperature

Non-operating

-40 ºC to +125 ºC

PROTECTION

Short-circuit

Hiccup, non-latching

Over-temperature

Hiccup, non-latching

RECOMMENDED SYSTEM CAPACITANCE

Input capacitance

(See Note 9)

3 x 270 µF

Output capacitance

(See Note 9)

3 x 680 µF

OUTPUT SPECIFICATIONS

Voltage adjustability

(See Note 1)

-4.5 Vdc to -5.5 Vdc

Output setpoint accuracy Using 1.0% trim resistors

±3.0%

Line regulation

Low line to high line

±1.0% max.

Load regulation

Full load to min. load

±1.0% max.

Min./max. load

0 A/25 A

Ripple and noise

(See Note 2)

100 mV pk-pk

5 Hz to 20 MHz

50 mV rms

Transient response

Deviation

75 mV typ.

(See Note 3)

150 µs recovery to

within regulation band

INPUT SPECIFICATIONS

Input voltage range

Nominal 12 V

10.2-13.8

+Vdc

Input current

No load

400 mA

Remote OFF

30 mA

Input current (max.)

(See Note 4)

14.2 A max. @ Io max.

and Vin = 10.8 V

Input reflected ripple

(See Note 2)

300 mA (pk-pk)

Remote ON/OFF

Logic compatibility

Logic high

ON

>2.4 Vdc

OFF

<1.2 Vdc

Start-up time

Power up

<10 ms

(See Note 5)

Remote ON/OFF

<10 ms

All specifications are typical at nominal input, full load at 25 °C ambient unless otherwise stated

SPECIFICATIONS