S15-48-3.3 BTCPOWER [Broadband TelCom Power, Inc.], S15-48-3.3 Datasheet - Page 5

• Manufacturer Part Number: S15-48-3.3
• Description: 48Vin 3.3Vout 4.5A
• Manufacturer: BTCPOWER [Broadband TelCom Power, Inc.]

Technical Specification
S15-48-3.3
Table 1 Output voltage trim vs. trim resistor value
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Trim Voltage
Broadband TelCom Power, Inc. –
+10%
+9%
+8%
+7%
+6%
+5%
+4%
+3%
+2%
+1%
80
70
60
50
40
30
20
10
120
100
0
80
60
40
20
Fig 4 Trim-up output vs. trim resistance
Fig 5 Trim-down output vs. trim resistance
0
1
1
2
Trim Resistor
2
Trim-down Vout change (%)
14.37k
21.20k
34.37k
72.82k
1.84k
2.74k
3.88k
5.29k
7.22k
9.90k
3
Trim-up Vout change (%)
3
4
4
5
5
Trim Voltage
6
-10%
6
-9%
-8%
-7%
-6%
-5%
-4%
-3%
-2%
-1%
7
7
8
8
Trim Resistor
9
9
101.30k
13.65k
20.95k
36.20k
0.87k
1.34k
2.56k
4.12k
6.10k
9.20k
1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
10
48Vin 3.3Vout 4.5A
10
Protection Features
Input under voltage lockout (UVL)
The input voltage must be at least 35V for the
unit to turn on. Once the unit has been turned on,
it will shut off when the input voltage drops below
34V.
Output Over-Current Protection (OCP)
The unit is protected against over current or short
circuit on the output. When sensing an over
current condition, the unit will enter constant
current operation and reduce the output voltage.
Upon short-circuit condition, the unit will shut
down.
After over-current or short circuit condition is
removed, the unit will resume normal operation
automatically.
Output Over Voltage Protection (OVP)
This unit does NOT have OVP function.
Over Temperature Protection (OTP)
This unit does NOT have OTP function.
Application Considerations
Input source Impedance
The unit has been designed to be stable with no
external capacitor when used in a low inductance
input and output circuit.
However in many applications, the inductance
with the distribution from the power source to the
input of the unit can affect the stability of the unit.
An external capacitor will improve the stability of
the unit. Also in many applications, the user has
to use decoupling capacitors at the output load,
to ensure the hold up time for the load.
PS S15-48-3.3 Rev4 1-30-05
BTCPower
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