76250EN Datasheet, PDF (1/2 Pages) C&D Technologies – EN Approved Converter Transformers

76250EN, 76253/XXEN
EN Approved Converter Transformers
SELECTION GUIDE
Order Code
Input
Voltage
(V)
76250EN
–
76253/35EN
3.3
76253/55EN
5.0
Output
Voltage
(V)
–
5.0
5.0
Output
Current
(mA Max)
–
100
200
Isolation
Voltage
(VDC)
6000
6000
6000
Turns
Ratio
1CT:1
1:√5
1:1.33
FEATURES
s Maxim Compatible
s BS EN 60950 Approved
s Isolation to 6kV
s Toroidal Construction
s Industry Standard Pinout
s UL 94V-0 Package Material
s Fully Encapsulated
DESCRIPTION
The 76250EN converter transformer is
specifically designed for use with Maxim
chipsets to provide isolated RS232 interfaces.
A carefully controlled turns ratio ensures
consistent performance whilst a toroidal
construction minimises EMI.
The 76253/XXEN converter transformers
are specifically designed for use with the
MAX253 chipset to provide isolated power
supplies. The 5V version can supply 1W
and the 3.3V version can supply 500mW.
A centre tapped secondary winding allows
for full bridge, half bride or voltage doubling.
The devices are fully approved to BS EN
60950 for use in telecoms applications.
76250EN CHARACTERISTICS
Parameter
Conditions
Primary Inductance, L_P
10kHz, 100mV
Leakage Inductance, L_L
100kHz, 100mV
Interwinding Capacitance, C _WW 100kHz, 100mV
D.C. Resistance, R_DC
<0.1VDC
Volt-time Product, E_T
5kHz, 5V
76253/35EN CHARACTERISTICS
Parameter
Conditions
Primary Inductance, L_P
100kHz, 250mV
Secondary Inductance, L _S
100kHz, 250mV
Leakage Inductance, L_L
100kHz, 250mV
Interwinding Capacitance, C _WW 100kHz, 250mV
D.C. Resistance, R_DC
>0.1VDC
Volt-time Product, E_T
5kHz, 5V
76253/55EN CHARACTERISTICS
Parameter
Conditions
Primary Inductance, L_P
100kHz, 250mV
Secondary Inductance, L _S
100kHz, 250mV
Leakage Inductance, L_L
100kHz, 250mV
Interwinding Capacitance, C _WW 100kHz, 250mV
D.C. Resistance, R_DC
>0.1VDC
Volt-time Product, E_T
5kHz, 5V
ABSOLUTE MAXIMUM RATINGS
Operating free air temperature range 76250EN
Operating free air temperature range 76253/XXEN
Storage temperature range
Lead Temperature 1.5mm from case for 10 seconds
Peak current I_PK 76250EN
Peak current I_PK 76253/XXEN
Isolation voltage (flash tested for 1 second)
All specifications typical at T_A=25°C.
MIN TYP MAX Units
1.0 2.0 2.5 mH
35 40 µH
5.0 10 pF
1.0 2.0 Ω
50
Vµs
MIN TYP MAX Units
53 92 120 µH
350 460 600 µH
1.5 3.6 µH
1.80 3.00 pF
0.60 1.00 Ω
20 35
Vµs
MIN
120
TYP
205
MAX Units
250 µH
280 362 445 µH
3.90 5.00 µH
1.20 3.00 pF
0.90 1.50 Ω
20 23
Vµs
0°C to 70°C
–40°C to 85°C
–50°C to 125°C
300°C
300mA
400mA
6000VDC
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