Industrial DC/DC CONVERTER
CGDI Standard Input TETHYS : 30W POWER
• Highly configurable DC/DC converter
• Up to 6 outputs and 3 independants line regulations
• Low profile : 0,33 “ ( 8.5mm)
• Nominal Power of 30 W without derating
• Wide temperature range : -40°C/+95°C case
• Galvanic isolation 1.500 VDC
• Integrated LC EMI filter
• Permanent short circuit protection
• External trim and sense adjustment : +/-5%
• Inhibit function
• RoHS process
Gaia Converter FC97-020.01/10 Revision L
©
REDEFINING THE SOURCE OF POWER
1-General
Industrial
Grade
For locations, phone, fax, E-Mail see back cover
2-Product Selection
Input Voltage Range
3 : 3.3 VDC
5 : 5 VDC
5B : +/-5VDC
12 : 12 VDC
12B : +/-12VDC
15 : 15 VDC
15B : +/-15VDC
24 : 24 VDC
24B : +/-24VDC
Permanent
I : 18-36 VDC
Output
5
The TETHYS 30W series is a full family of highly
configurable DC/DC low profile power module
designed for direct implementation on high
density printed circuit boards in distributed power
architecture and are particularly suitable for mo-
bile or ground fixed application in transportation,
industrial and telecommunication areas. This mo-
dule uses a high frequency fixed swiching technic
at 480 KHz providing excellent reliability, low
noise characteristics and low profile package.
This model is available with nominal input vol-
tages as 24 volts in range of 18-36 volts. The
serie includes thousands of output configura-
tion from single, bi up to six possible output
voltages in choices of 3,3, 5, 12, 15, 24 volts
with trim and sense functions for output vol-
tage adjustment.
No external heatsink is required for the for CGDI
series to supply 30W output power over the full
temperature range. All the modules are designed
with LC network filters to minimize reflected input
current ripple and output voltage ripple .
The modules include a soft-start, an input
undervoltage lock-out, a permanent short cir-
cuit protection an output overvoltage protection
and a thermal protection to ensure efficient
module protections.
The soft-start allows current limitation and
eliminates inrush current during start-up. The
short circuit protection completely protects the
module against short-circuits of any duration by
a shut-down and restores to normal when the
overload is removed. The thermal protection is
adjusted to 110°C and protects the module
against overheat.
The inhibit function is commanded with a low
logic level and disables the module for applica-
tions requiring on/off operations.
The design has been carried out with surface
mount components and is manufactured in a
fully automated process to guarantee high
quality. Each modules are tested with a GAIA
Converter automated test equipment.
2:1 Standard Input
Configurable Multiple Outputs
Metallic case - 1 500 VDC Isolation
Multiple output model : CGDI - input output output output
For locations, phone, fax, E-Mail see back cover
2
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
2- Product Selection (continued)
Converter Selection Chart
C GD I - F - 5 - 0 - 12B
Input voltage range :
F : 9-18 Vdc
I : 18-36 Vdc
Output voltage :
5 : 5 Vdc, 20W First line
12B : +/-12 Vdc, 10W second line
See table page 1 for complete possibilities
Input Voltage Range
Designation
I
Output Voltage
Single line model : CGDI- O O > 30 W first line output : primary output
Dual line model : CGDI- O > 20 W first line output : primary output
> 10 W second line output : secondary output
Triple line model : CGDI- > 10 W on each line output : primary and
secondary outputs
Permanent
18-36 VDC
Designation
3
5
5B
12
12B
15
15B
24
Output Voltage
3.3 VDC
5 VDC
+/-5VDC
12 VDC
+/-12VDC
15 VDC
+/-15VDC
24 VDC
First line output functions : Trim function at +/- 5%
Sense function at +/- 5%
Tight regulation below 1%
Indefinite short circuit protection
Secondary line output functions : Independant regulation from primary output
Indefinite short circuit protection
For locations, phone, fax, E-Mail see back cover
3
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
3- Electrical Specifications
Data are valid at +25°C, unless otherwise specified.
Note * : For proper operation the CGDI module requires to install a 22µF chemical or tantalum capacitance accross output terminals.
Note ** : The ripple output voltage is the periodic AC component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered.
This noise can be reduced by adding an external capacitor (typically 10nF/rated voltage depending on isolation requirement) connected between the pin Gi and the
pin Go of the converter. This capacitor should be layed-out as close as possible from the converter.
Note *** : For load regulation characteristics from 0% to full load, please contact factory.
Parameter Conditions Limit or
typical Units CGDI-I
Input
Nominal input voltage Full temperature range Nominal VDC 24
Permanent input
voltage range (Ui) Full temperature range Min. - Max. VDC 18- 36
Undervoltage lock-out
(UVLO) Threshold Minimum
Maximum
VDC
VDC
16
17,5
Start up time
Ui nominal
Nominal output
Full load : resistive
Maximum ms 40
Reflected ripple current Ui nominal, full load at
switching freq. BW = 20MHz Maximum mApp 50
Input current in short circuit
mode (Average)
Ui nominal
Short-circuit Maximum mA 60
No load input current Ui nominal
No load Maximum mA 60
Primary Output
Output voltage * Ui min. to max.
75% load Nominal VDC 3,3V , 5V , 12V , 15V or 24V
Consult factory for other outputs
Set Point accuracy
+ Line regulation
+ Load regulation
Ambient temperature : +25°c
Ui min. to max.
25% to full load
Maximum % +/- 1
Output power Full temperature range
Ui min. to max. Maximum W 10, 20 or 30
(limited to respectively 2A, 4A or 6A max)
Ripple output voltage **
3,3V and 5V output
12V output
15V and 24V output
Ui nominal
Full load
BW = 20MHz
Maximum
Maximum
Maximum
mVpp
mVpp
mVpp
40
50
60
Trim function Ui nominal Maximum
Minimum
%
%
+ 5
- 5
Sense function Ui nominal Maximum
Minimum
%
%
+ 5
- 5
Secondary Output
Output voltage * Ui min. to max.
75% load Nominal VDC
3,3V , 5V , 12V , 15V or 24V
+/- 5V , +/- 12V , +/- 15V or +/- 24V
Consult factory for other outputs
Set point accuracy Ambient temperature : +25°c
Ui nominal, 75% load Maximum % +/- 2
Output power Full temperature range
Ui min. to max. Maximum W 10 or 20
(limited to respectively 2A or 4A max)
Ripple output voltage **
3,3V, 5V and +/-5V output
12V and +/-12V output
15V and +/-15V output
24V and +/-24V output
Ui nominal
Full load
BW = 20MHz
Maximum
Maximum
Maximum
Maximum
mVpp
mVpp
mVpp
mVpp
50
100
150
150
Line regulation Ui min. to max.
Full load Maximum % +/- 1
Load regulation *** Ui nominal
25% to full load Maximum % +/- 2,5
For locations, phone, fax, E-Mail see back cover
4
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
4- Switching Frequency
6- Protection Functions
Characteristics Protection Device Recovery Limit or typical Specifications
Output short circuit protection (SCP) Hiccup circuitry with
auto-recovery
Automatic
recovery Permanent See section 11
Output overvoltage protection (OVP) Zener clamp /
Maximum
Maximum
Maximum
Maximum
For 3.3v : 4v
For 5v : 6v
For 12v : 14v
For 15v : 17v
over temperature protection (OTP) Thermal device with
hysteresis cycle
Automatic
recovery Nominal 115°C
7- Reliability Data
Parameter Conditions Limit or typical Specifications
Switching frequency
Full temperature range
Ui min. to max.
No load to full load
Nominal, fixed 18-36 VDC input : 480 KHz
5- Isolation
Characteristics Conditions Temperature Specifications
Mean Time Between Failure (MTBF)
According to MIL-HDBK-217F
Ground fixed (Gf) Case at 40°C
Case at 70°C
480 000 Hrs
190 000 Hrs
Ground mobile (Gm) Case at 40°C
Case at 70°C Consult factory
Mean Time Between Failure (MTBF)
According to IEC-62380-TR Telecom switchers Ambient at 25°C
100% time on 800 000 Hrs
Parameter Conditions Limit or typical Specifications
Electric strength test voltage (basic version) Input to output Minimum 1 500 VDC / 1 min
Electric strength test voltage between outputs
(for outputs of the same line of regulation) Output to output Minimum No isolation
Electric strength test voltage between outputs
(for outputs of different line of regulation) Output to output Minimum 500 VDC/ / 1 min.
Isolation resistance 500 VDC Minimum 100 MOhm
For locations, phone, fax, E-Mail see back cover
5
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
8- Electromagnetic Interference
Electromagnetic interference requirements according to EN55022 class A and class B can be easily achieved as
indicated in the following table :
To meet EN55022 Class B requirements, Gaïa Converter
recommends the use of an external front filter (see EN55022
ClassB EMI Filter Design Note) together with a common
mode noise capacitance Cc (10nF/rated voltage depending
on isolation requirement) connected between Gin and Gout.
This common mode noise capacitance Cc should be layed-
out as close as possible from the DC/DC converter. The
typical schematic hereafter describes the Tethys used in a 4
outputs configuration (exemple 5V/2A, 3.3V/ 2A and +/-
15V) with front filter, common mode noise Cc and output
capacitance to reduce output ripple voltage.
8-1 Module Compliance with EN 55022 Class B Standard
100K
Input Filter KG9502
Common mode noise capacitance C = 10nF
c
TETHYS
Vi + Vo1
Gi - Vo1
C4
C2
C3
L2
C1
L1
- Input
+ Input
Gin
Command
+ Vo2
- Vo2
+ Vo3
- Vo3
Common 3
+ Vo1
0V
+ Vo2
0V
+ Vo3
- Vo3
0V
22µF
22µF
22µF
22µF
Case
On/Off
Electromagnetic Interference according to EN55022
Conducted noise
emission
Configuration With common mode capacitor
C c = 10nF and input capacitor C i
With common mode capacitor
C C = 10nF and external filter
Models
18-36V input models Class A, C i =4.7µF / 50 V tantalum Class B
Radiated noise
emission
Configuration With common mode capacitor C c = 10 nF
Models
All models Class B
For locations, phone, fax, E-Mail see back cover
6
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
9- Thermal Characteristics
Characteristics Conditions Limit or typical Performances
Operating ambient temperature
range at full load Ambient temperature * Minimum
Maximum
- 40°C
+ 71°C
Operating case temperature
range at full load Case temperature Minimum
Maximum
- 40°C
+95°C
Storage temperature range Non functionning Minimum
Maximum
- 40°C
+ 105°C
Thermal resistance Rth case to ambient in free air
natural convection Typical 4°C /W
Note * : The upper temperature range depends on configuration, the user must assure a max. case temperature of + 95°C.
10 10030 807060 9020 40 50
25%
75%
50%
100%
Power (W)
Temperature (˚C)
Full load ambient temperature without derating : 71˚C
Maximum case temperature : 95˚C
Natural convection operation area
Additionnal cooling operation area
Maximum storage temperature : 105˚C
The CGDI series operating case temperature must not exceed 95°C. The maximum ambient temperature admissible for the
DC/DC converter corresponding to the maximum operating case temperature of 95°C depends on the ambient airflow, the
mounting/orientation, the cooling features and the power dissipated.
To calculate a maximum admissible ambient temperature the following method can be used. Knowing the maximum case
temparature Tcase = 95°C of the module, the power used Pout and the efficiency η :
• determine the power dissipated by the module Pdiss that should be evacuated :
Pdiss = Pout(1/ηη
ηη
η - 1)
• determine the maximum ambient temperature :
Ta = 95°C - Rth x Pdiss
where Rth is the thermal resistance from the case to ambient.
The previous thermal calculation shows two areas of operation :
• a normal operation area in a free natural ambient convection (grey area in this following graph),
• an area with cooling features (air flow or heatsink) ensuring a maximum case temperature below the maximum
operating case temperature of 95°C (white area in the following graph).
For locations, phone, fax, E-Mail see back cover
7
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
10- Environmental Qualifications
The modules have been subjected to the following environmental qualifications.
Characteristics Conditions Severity Test procedure
Climatic Qualifications
Life at high
temperature
Duration
Temperature
Status of unit
1 000 Hrs
95°C case
unit operating
IEC 68-2-2
Humidity steady
Damp heat
Temperature
Duration
Status of unit
93 % relative humidity
40°C
56 days
unit not operating
IEC 68-2-3
Test Ca
Temperature
cycling
Number of cycles
Temperature change
Transfert time
Steady state time
Status of unit
200
-40°C / +71°C
40 min.
20 min.
unit not operating
IEC 68-2-14
Test N
Temperature
shock
Number of shocks
Temperature change
Transfert time
Steady state time
Status of unit
50
-40°C / +105°C
10 sec.
20 min.
unit not operating
IEC 68-2-14
Test Na
Mechanical Qualifications
Vibration
(Sinusoidal)
Number of cycles
Frequency : amplitude
Frequency : acceleration
Amplitude /acceleration
Duration
Status of unit
10 cycles in each axis
10 to 60 Hz / 0.7 mm
60 to 2000 Hz / 10 g
0.7 mm/10 g
2h 30 min. per axis
unit not operating
IEC 68-2-6
Test Fc
Shock
(Half sinus)
Number of shocks
Peak acceleration
Duration
Shock form
Status of unit
3 shocks in each axis
100 g
6 ms
1/2 sinusoidal
unit not operating
IEC 68-2-27
Test Ea
Bump
(Half sinus)
Number of bumps
Peak acceleration
Duration
Status of unit
2 000 bumps in each axis
25 g
6 ms
unit not operating
IEC 68-2-29
Test Eb
Electrical Immunity Qualifications
Electrical
discharge
susceptibility
Number of discharges
Air discharge level
Contact discharge level
Air discharge level
Contact discharge level
10 positive & 10 negative discharges
4 kV : sanction A
2 Kk : sanction A
8 Kk : sanction B
4 kV : sanction B
EN55082-2 with :
EN61000-4-2
IEC 801-2
Electrical field
susceptibility
Antenna position
Electromagnetic field
Wave form signal
Frequency range
at 1 m
10 V/m
AM 80%, 1 kHz
26 MHz to 1 GHz
EN55082-2 with :
EN61000-4-3
IEC801-3
Electrical fast
transient
susceptibility
Burst form
Wave form signal
Impedance
Level 1
Level 3
5/50 ns
5 kHz with 15 ms burst duration period 300 ms
50 Ohm
0,5 kV : sanction A
2 kV : sanction B
EN55082-2 with :
EN61000-4-4
IEC801-4
For locations, phone, fax, E-Mail see back cover
8
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
11- Description of Protections
11-1 Input Undervoltage Lock-out (UVLO)
The input undervoltage lock-out protection device turns-
on and turns-off the output voltage when the input bus
voltage reaches the undervoltage lock-out threshold. There
is no hysteresis cycle at turn-on and turn-off.
11-2 Output Short Circuit Protection (SCP)
The short circuit protection device protects the module
against short circuits of any duration and restores the
module to normal operation when the short circuit is
removed. It operates in «hiccup» mode by testing
periodically if an overload is applied (typically every 200ms
recovery time). The overload detection threshold is typically
200% of maximum current with a detection time lower
than 5ms.
11-3 Output Overvoltage Protection (OVP)
The output overvoltage protection device protects external
components against high voltage or possible overvoltages
which can be supplied by the module (i.e in case of internal
failure). It consists of a zener diode clamping the output
voltage; under worst case conditions this zener diode will
short-circuit.
The output voltage protection is not designed to withstand
externally applied output overvoltages to protect the mo-
dule itself.
11-4 Over Temperature Protection (OTP)
A thermal protection device adjusted at 115°C (+/-5%)
internal temperature with 10°C hysteresis cycle will inhibit
the module as long as the overheat is present and restores
to normal operation automatically when overheat is
removed. The efficiency of the OTP function is warranty
with the module mounted on a heatsink.
time
recovery time
detection time
recovery time
x
100
Vo (%)
Baseplate
Temperature
On
115˚c
Off
10˚c
Vin
On
Off
UVLO
Turn-on/Turn-off
For locations, phone, fax, E-Mail see back cover
9
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
12- Description of Functions
12-1 On/Off Function
The control pin 16 (On/Off) can be used for applications
requiring On/Off operation. By using an open collector
command with a transistor Q referenced to the common
terminal (Gi) :
• A logic pulled low (<0.2V@1mA, referenced to Gi)
on pin 16 disables the converter
• No connection or high impedance on pin 16 enables
the converter.
By releasing the On/Off function, the converter will restart
within the start-up time specifications given in table page 3.
For further details please consult ‘’Logic On/Off’’ applica-
tion note.
12-2 Trim Function
The primary output voltage Vo1 may be trimmed at +/-5%
via a single external trimpot or fixed resistor. The trimpot
should be connected as shown in figure hereafter.
Value of the trim resistance is given in the following
table :
12-3 Sense Function
If the load is seperated from the output by any line lenght,
some of these performance characteristics will be degraded
at the load terminals by an amount proportional to the
impedance of the load leads. With the sense function, the
voltage at the power supply output shifts by up to the
maximum allowed voltage per load line to compensate
the voltage drop in the load leads, there by maintaining a
constant voltage at the load terminals.
Both Trim and Sense function can be combined but the
compensation voltage must not exceed 0.5V max or +/-
5% of the output voltage.
Vo1 R1 Value Vo1 R1 Value
2,5 V 0 Ohm 12 V 12 KOhm
3,3 V 0 Ohm 15 V 22 KOhm
5 V 0 Ohm 24 V 36 KOhm
GI
On/Off
Command
For locations, phone, fax, E-Mail see back cover
10
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
Tethys series can be used in parallel to increase output power. Up to 3 Tethys can be used to add power up to a maximum
of 90W. Contact factory for further details.
13-1 Parallel operations
13- Application Notes
For locations, phone, fax, E-Mail see back cover
11
Industrial
Grade
CGDI Standard Input TETHYS Series
Gaia Converter FC97-020.01/10 Revision L
©
5
17- Connections
14- Dimensions
Dimension are given in mm (inches). Tolerance : +/- 0,2 mm (+/- 0.01 “) unless otherwise indicated.
Weight : 85 grams (2.9 Ozs) max.
27,94 (1.1")
50,80 (2")
76,30 (3")
82,40 (3.25")
2x5,08 (2x0.2")
2x5,08 (2x0.2") 5x2,54 (5x0.1")
1x5,08 (1x0.2")1x5,08 (1x0.2")
40,64 (1.6") 4 holes M3
8,6 
(0.33")
0,3 min (0.001")
48,26 (1.9")
49,9 (1.96")
56.00 (2.2")
10 
(0.39")
Pin dimensions : O 0,83mm (0.032")
* Except pin 15 : 6 mm (0.23") long
5 
(0.19")*
+/-1
7,2 +/-0,4
(0.28")
1,45 +/-0,4
(0.06")
S i n g l e l i n e D u a l l i n e T r i p l e l i n e
1 O u t p u t 2 O u t p u t s 3 O u t p u t s 4 O u t p u t s 5 O u t p u t s 6 O u t p u t s
Pin CGDI - - - 0 - 0 CGDI - - - 0 - CGDI - - - - 0 CGDI - - - 0 - CGDI - - - - CGDI - - - - CGDI - - - - CGDI - - - -
1 Ouput 1 + (+Vo1) Output 1 + (+Vo1) Output 1 + (+Vo1) Output 1 + (+Vo1) Output 1 + (+Vo1) Output 1 + (+Vo1) Output 1 + (+Vo1) Output 1 + (+Vo1)
2 Sense + Sense + Sense + Sense + Sense + Sense + Sense + Do not connect
3 Trim Trim Trim Trim Trim Trim Trim Do not connect
4 Do not connect Do not connect Do not connect Do not connect Do not connect Do not connect Do not connect Return 1 (Go1)
5 Sense - Sense - Sense - Sense - Sense - Sense - Sense - Do not connect
6 Return 1 (Go1) Return 1 (Go1) Return 1 (Go1) Return 1- (Go1) Return 1 (Go1) Return 1 (Go1) Return 1 (Go1) Output 1 - (-Vo1)
7 Do not connect Do not connect Output 2+ (+Vo2) Do not connect Output 2 + (+Vo2) Output 2 + (+Vo2) Output 2 + (+Vo2) Output 2 + (+Vo2)
8 Do not connect Do not connect Do not connect Do not connect Do not connect Do not connect Return 2 (Go2) Return 2 (Go2)
9 Do not connect Do not connect Return 2 (Go2) Do not connect Return 2 (Go2) Return 2 (Go2) Output 2 - (-Vo2) Output 2 - (-Vo2)
10 Do not connect Output 2+ (+Vo2) Do not connect Output 2+ (+Vo2) Output 3 + (+Vo3) Output 3 + (+Vo3) Output 3 + (+Vo3) Output 3 + (+Vo3)
11 Do not connect Do not connect Do not connect Return 2 (Go2) Do not connect Return 3 (Go3) Return 3 (Go3) Return 3 (Go3)
12 Do not connect Return 2 (Go2) Do not connect Output 2- (-Vo2) Return 3 (Go3) Output 3 - (-Vo3) Output 3 - (-Vo3) Output 3 - (-Vo3)
13 - Input (Gi) - Input (Gi) - Input (Gi) - Input (Gi) - Input (Gi) - Input (Gi) - Input (Gi) - Input (Gi)
14 + Input (Vi) + Input (Vi) + Input (Vi) + Input (Vi) + Input (Vi) + Input (Vi) + Input (Vi) + Input (Vi)
15 Case Case Case Case Case Case Case Case
16 On/Off On/Off On/Off On/Off On/Off On/Off On/Off On/Off
15- Materials
Case : Matallic black anodized coating.
Pins : Plated with pure matte tin over nickel underplate.
16- Product Marking
Upper face : Company logo, location of manufacturing.
Side face : Module reference, option, date code : year and week of manufacturing.
Information given in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed for the consequence of its use nor for any infringement of patents or other rights of third parties which may result from its use.
These products are sold only according to GAIA Converter general conditions of sale, unless otherwise confirmed by writing. Specifications subject to change without notice.
Printed in France by GAIA Converter FC97-020.01/10 Revision L Graphisme : Philippe Clicq
Represented by :
For more detailed specifications and applications information, contact :
International Headquarters
GAÏA Converter - France
ZI de la Morandière
33185 LE HAILLAN - FRANCE
Tel. : + (33)-5-57-92-12-80
Fax : + (33)-5-57-92-12-89
North American Headquarters
GAÏA Converter Canada, Inc
4038 Le Corbusier Blvd
LAVAL, QUEBEC - CANADA H7L 5R2
Tel. : (514)-333-3169
Fax : (514)-333-4519