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Features
DC/DC Converter
TSI-24 Series 15 Watt
Step-down Converter with very high Effi-
ciency (> 91%)
Input Voltage Range +8 VDC to +27 VDC
1.2 VDC to 5.1 VDC Output,
up to 3 A
Fast Transient Response
Remote ON/OFF
Overload Protection
Low Output Noise
Standby Current only 100 A
Small SIL- or DIP-Package
2 Years Product Warranty
This new generation of step-down converters provides designers with a
cost-effective solution for converting 8 VDC to 27 VDC voltage down to
1.25 VDC to 5 VDC. To achieve highest efficiency, these dc/dc convert-
ers are using adwanced circuit techniques , as amorphous ferrite, solid
aluminum capacitors and a synchronous commutation IC.
The TSI-24 series needs no further external components to operate
within its specifications. A very high efficiency allows operation without
additional heatsink. This product finds many applications in distributed
powersystems where voltage conversion at the point of load is required.
Models
Ordercode
Input voltage range
Output voltage
Output current max.
Efficiency typ.
Package
TSI-24-5.0S3R0P
8 27 VDC
* + 3.3 VDC
3000 mA
91.0 %
SIP
TSI-24-5.0S3R0F
DIP
* Output adjustable 1.2 to 5.1 VDC
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All specifications valid at nominal input voltage, full load and +25C after warm-up time unless otherwise stated.
Input Specifications
Input current (no load)
1 mA max.
Input current (at full load)
1350 mA max. (12 Vin)
Stand-by current
100 A typ
Output Specifications
Output voltage tolerance
3.0 %
Output voltage adjustment
+1.2 VDC to +5.1 VDC
Output voltage selection
+1.2 Vout
V.ADJ (pin 14) link wire to
+Vout (pin 17,18)
+3.3 Vout
V.ADJ (pin 14) = open
+5.0 Vout
VADJ (pin 14) connected via
20 kOhm resistor to +Vout
(pin 17,18)
Regulation Input variation
0.3 %
Load variation 0 100 %
< 3.0 %
Ripple and noise (20 MHz Bandwidth)
35 mVpk-pk typ.
Transient response time
(with 220 F output cap.)
50 % Load change:
80 sec typ.
Vout over-/undershoot:
70 mV typ.
Temperature coefficient
0.01 % / C
Short circuit protection
>105% constant current
Capacitive load
20'000 F
Remote ON/OFF control
ON = Pin 5 (ON/OFF Pin) to pin 4 (GND) open
OFF = Pin 5 (ON/OFF Pin) to pin 4 (GND) short
General Specifications
Temperature ranges Operating
10 C ... +71 C
Storage
25 C ... +85 C
Derating above 50 C
3 % / C
Humidity (non condensing)
30 95 % rel H
Reliability, calculated MTBF (MIL-HDBK-217 F)
>350'000 h at 40 C
Isolation Input/Output
none
Switching frequency
150 kHz typ. (PWM modulation)
Physical Specifications
Vibration
5 to 10 Hz amplitude 10 mm pk-pk
10 to 55 Hz acceleration 2 G
Shock
acceleration 20 G max. time 11 ms
Package weight
13 g (0.46 oz)
Soldering temperature
max. 260C max. / 10 sec.
DC/DC Converter
TSI-24 Series 15 Watt
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Specifications can be changed without notice
Outline Dimensions mm (inches)
DIP package
SIP package
Pin-Out
Pin
DIP
SIP
1
+V Input (Vcc)
+V Input (Vcc)
2
+V Input (Vcc)
+V Input (Vcc)
3
V Input (GND)
V Input (GND)
4
V Input (GND)
V Input (GND)
5
Remote on/off
Remote on/off
14
V Output adj
V Output adj
15
-V Output
-V Output
16
-V Output
-V Output
17
+V Output
+V Output
18
+V Output
+V Output
19
No function
No pin
36
No function
No pin
14
10.16
(0.4)
2.54 2.54
3.4
(0.13)
(0.1)(0.1)
1
36
2.54 2.54
(0.1)(0.1)
5
22.86
(0.9)
C/L
50.8 (2.0)
2.25
(0.09)
20.5
(0.807)
18
2.542.54 2.542.54
10.16
(0.4)
(0.1) (0.1)(0.1) (0.1)
(
0
.
236)
6.0
19
2.25
(0.09)
2.25
(0.09)
7.0
2.0
0.8
(0.03)
(0.08)
(0.28)
2.54
(0.1)
Stand off
10.1
3.4
(0.4)
(0.13)
1
2.54 2.54
(0.1) (0.1)
2.54
(0.1)
36
22.8
(0.9)
5
14
2.54
(0.1)
C/L
50.8
(2.0)
(0.09)
2.5
(0.1)
20.5
(0.81)
15.24
(0.6)
10.1
(0.4)
18
2.54 2.54 2.54
(0.1) (0.1) (0.1)
8.0
(0.32)
2.25
2.6
(0.1)
19
(0.1)
2.6
(0.09)
2.25
7.0
(0.28)
0.8
(0.03)
2.5
(0.1)
DC/DC Converter
TSI-24 Series 15 Watt
Page 4
Specifications can be changed without notice
Connections
Jenatschstrasse 1
CH-8002 Zurich
Switzerland
Tel. +41-1284 2911
Fax +41-1201 1168
e-mail: sales@traco.ch
internet: http://www.tracopower.com
Rev. 11/00
Output Voltage Adjustement Connection
2 x 330
F/35V
Normal Connection (Standard)
C1
Remote ON/OFF Connection
+
=
1
+Vin
Capacitors:
C1 ==> SXE series Mfg. Nippon Chemi-Con
C2 ==> SH series Mfg. Sanyo OS-CON
+Vout
17
C2
Load
2
3
4
18
16
15
Vout
14
V Adj.
ON/OFF
5
C1
+
=
1
+Vin
+Vout
17
C2
Load
2
3
4
18
16
15
14
V Adj.
ON/OFF
5
ON = Open
OFF = Short
ON/OFF
TSI-24-5.0S3R0
C1
+
=
1
+Vin
+Vout
17
C2
Load
2
3
4
18
16
15
-Vout
14
V Adj.
ON/OFF
5
VR1
VR1 = 5.1
1.2
(Vout 1.0)
VR1 = kOhm
Vout = VDC
TSI-24-5.0S3R0
TSI-24-5.0S3R0
Value of C2:
Vout: 1.2 V...2.1V 2 x 330 F /35V
Vout: 2.1 V...3.1V 2 x 220 F /35V
Vout: 3.1V...5.1V 2 x 150 F /35V
Value of C2:
Vout: 1.2 V...2.1V 2 x 330 F /35V
Vout: 2.1 V...3.1V 2 x 220 F /35V
Vout: 3.1V...5.1V 2 x 150 F /35V
Value of C2:
Vout: 1.2 V...2.1V 2 x 330 F /35V
Vout: 2.1 V...3.1V 2 x 220 F /35V
Vout: 3.1V...5.1V 2 x 150 F /35V
2 x 330
F/35V
2 x 330
F/35V
C2 ==> FH series Mfg. Nippon Chemi-Con
-Vout
DC/DC Converter
TSI-24 Series 15 Watt
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