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Features
DC/DC Converter
TAM 25 Series 25 Watt
Models
Single-, Dual-, and Triple Output Models
Wide 2:1 Input Range
Ve ry high Efficiency up to 84%
Extended Temp. Range available
Internal Filter to meet EN 55022, Class A
and FCC Part 15, Level A
I/O-Isolation 500VDC (1’500VDC for Triple
Output Models)
Small Dimensions: Single- and
Dual Output Models: 50x50x10.5mm,
Triple Output Models: 71x61x10.5mm
Remote ON/OFF
Shielded Metal Case
2 Year Product Warranty
The TAM series is a range of high performance 25W DC/DC-
converters with very high power density . They provide a cost effective
solution in industrial, datacommunication and telecom applications
with limited space on PCB. These converters are built in SMT -hybrid
technology on a ceramic substrate which together with a metal
case provide a very good heat dissipation. No additional heatsink
is necessary for operating temperature up to +75 °C (resp. +85°C)
at full load.
Ordercode Input voltage range Output 1 Output 2 Output 3 Efficiency typ.
TAM 25-1211 9.5 – 18VDC 5 VDC/ 4.4 A 75%
TAM 25-2411 5 VDC/ 5 A 82 %
TAM 25-2412 12 VDC/ 2 A 83 %
TAM 25-2421 18 – 36 VDC +12 VDC/ 1 A –12 VDC/ 1 A 83 %
TAM 25-2422 +15 VDC/ 0.83 A –15 VDC/ 0.83 A 83 %
TAM 25-4811 5 VDC/ 5 A 82 %
TAM 25-4812 12 VDC/ 2 A 83 %
TAM 25-4821 36 – 72 VDC +12 VDC/ 1 A –12 VDC/ 1 A 83 %
TAM 25-4822 +15 VDC/ 0.83 A –15 VDC/ 0.83 A 83 %
Models with extended Temp. Range –25 to +85°C
TAM 25-2411-B 5 VDC/ 5 A 83 %
TAM 25-2412-B 12 VDC/ 2.5 A 84 %
TAM 25-2431 18 – 36 VDC 5 VDC/ 3.8 A +12 VDC/ 0.25 A –12 VDC/ 0.25 A 84 %
TAM 25-2432 5 VDC/ 3.1 A +15 VDC/ 0.31 A –15 VDC/ 0.31 A 84 %
TAM 25-4811-B 5 VDC/ 5 A 83 %
TAM 25-4812-B 12 VDC/ 2.5 A 84 %
TAM 25-4831 36 – 72 VDC 5 VDC/ 3.8 A +12 VDC/ 0.25 A –12 VDC/ 0.25 A 84 %
TAM 25-4832 5 VDC/ 3.1 A +15 VDC/ 0.31 A –15 VDC/ 0.31 A 84 %
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All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
Input Specifications
Input current (no load) 12 V in models 35 mA typ.
24 Vin models 30 mA typ.
48 Vin models 20 mA typ.
Input current (full load) 12 Vin models 3’000 mA typ.
24 Vin; 5 Vout models: 1’270 mA typ.
24 Vin; 12 & ±12 Vout models: 1’210 mA typ.
24 Vin; other output models: 1’250 mA typ.
48 Vin; 5 Vout models: 635 mA typ.
48 Vin; 12 & ±12 Vout models: 605 mA typ.
48 Vin; other output models: 625 mA typ.
Surge voltage (only triple- and B- version models) 24 Vin models: 39 VDC max.. (1 sec. max.)
48 Vin models: 75 VDC max. (1 sec. max.)
Conducted noise (input) EN 55022 level A, FCC part 15, level A
Output Specifications
Voltage set accuracy – main output ± 1.0 %
– auxilary outputs dual: ± 1.5 %
triple: ± 4.0 %
Output voltage adjustment + 5 % / – 20%
Regulation – Input variation Vin min. to Vin max.
– single- and triple output models ± 0.5 % max.
– dual output models ± 1.0 % max.
– Load variation 10 – 100 %:
– single output models ± 1.0 % max.
– dual output models ( balanced load ) ± 2.0 % max.
– triple output models Out 1: ± 1.0 % max.
Out 2 & 3: ± 3.0 % max. (> 10% load at Out 1)
– Cross regulation ± 3.0 % max.
Ripple and noise (20 MHz Bandwidth) 120 mVpk-pk max
Temperature coefficient ± 0.02 % / °C
Output current limitation 105% – 130% of Iout max.
foldback mode
Short circuit protection foldback, indefinite (automatic recovery)
Capacitive load (at min load) single output models: 500 µF max.
dual output models: 250 µF max.
triple output models: 100 µF max.
General Specifications
Temperature ranges – Operating standard: – 25 °C ... + 75 °C (no derating)
extended: – 25 °C ... + 85 °C (no derating)
– Case temperature standard: + 95 °C max.
extended: + 115 °C max.
– Storage – 55 °C ... + 125 °C
Humidity (non condensing) 95 % rel H max.
Reliability, calculated MTBF (MIL-HDBK-217 E) > 400’000 h @ + 25 °C
Isolation voltage Input/Output single- & dual output models: 500 VDC
triple output- and B- version models: 1‘500 VDC
Isolation capacity Input/Output 10 nF typ
DC/DC Converter
TAM 25 Series 25 Watt
www.tracopower.com Page 3
All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
Reduction of conducted Noise with external Capacitor
In order to meet conducted emissions EN55022-A and EN55011-A a capacitor at the input side of triple output models
and B-version models has to be installed.
Note:
C1 = Electrolytic capacitor low ESR type or
MLCC Cap for SMD (TCCR or THCR type from
Nippon Chemi-Con)
The value of C1 is between 1µF and 10 µF,
depending on the load
For 24V input models use 50V capacitor .
For 48V input models use 100V capacitor .
General Specifications
Isolation resistance Input/Output (500 VDC) > 100 M Ohm
Switching frequency (fixed) 300 kHz typ. (Pulse width modulation PWM)
Remote ON/OFF (optional):ON: 2.5 ... 5.5 VDC or open circuit.
OFF: 0 ... 1 VDC or short circuit pin 1 and –Vin
Physical Specifications
Case material – single- & dual output models: black coated metal with insulated baseplate
– triple output- and B- version models: Aluminum anodized
Soldering temperature max. 260 °C / 10 sec.
Output Voltage Adjustment
Single Output Dual Output Triple Output
DC/DC Converter
TAM 25 Series 25 Watt
Output voltage adjustment range: +5% to –20%
TAM25
+Out2
+Out1
1µF
to
10µF
C1
Case
–Vin
Cext
+Vin
+Vin
–Out3
Com
–Vin
Load
CW
100K
Pot.
CCW
CW
100K
Pot.
CCW
CW
100K
Pot.
CCW
–Vout
Trim
+Vout
Common
Trim
–Vout
Common
Trim
+Vout 1
Page 4
Specifications can be changed without notice
Outline Dimensions mm (inches)
Jenatschstrasse 1 • CH-8002 Zurich • Switzerland
Tel. +41-1284 2911 • Fax +41-1201 1168 • e-mail: sales@traco.ch • internet: http://www.tracopower.com
Pin-Out
Pin Single Dual
1
Remote on/of f Remote on/off
2+Vin (Vcc) +Vin (Vcc)
3–Vin (GND) –Vin (GND)
4Trim Trim
5–Vout –Vout
6+Vout Common
7No pin +Vout
Rev. 12/00
DC/DC Converter
TAM 25 Series 25 Watt
Single- and Dual Output
Models T riple Output Models
and B-Version
Pin-Out
Pin Triple B-Version B–Version
24VDC 48VDC
1
Remote on/off Remote on/off Remote on/off
2Case Case Case
3+Vin (Vcc) –Vin (GND) +Vin (Vcc)
4–Vin (GND) +Vin (Vcc) –Vin (GND)
5C ext. Cext. C ext.
6–Vout 3 No function No function
7+Vout 2 No function No function
8Common –Vout –Vout
9+Vout 1 +Vout +Vout
10 Trim Trim Trim
Weight: 55g (0.12lb) Weight: 60g (0.13lb)
612.7 10.7
±0.3
10.16 10.16 10.16 10.16
50.8
10.210.16 10.16 10.16
5.08
50.8
12.7
5
6
7
1
2
3
4
Bottom
view
45.72
10.16
71 ±0.3
61
±0.3
5
4
3
2
1
6
7
8
9
10
Bottom view
63.5 ±0.3
10.2
10.16 10.16 10.16
10.1610.2
3.75
3.5
(0.4)
(0.42
±0.01
)
(2.0) (2.4
±0.01
)
(0.24)
(2.0)
(0.4)
(2.8 ±0.01)
(0.5) (0.14)
(0.4)(0.4) (0.4)
(0.4) (0.4) (0.4) (0.4)
(0.4) (0.4) (0.4) (0.4) (0.4)
(0.4)
(0.2) (0.5)
(2.5 ±0.01)(0.15)
(1.8)
Pin ø 1 mm (0.04)
Pin ø 1 mm (0.04)
