NDL4809SC Murata Power Solutions Inc, NDL4809SC Datasheet - Page 3

• Manufacturer Part Number: NDL4809SC
• Description: DC/DC Converters & Regulators 2W 48V to 9V 222mA Single Output
• Manufacturer: Murata Power Solutions Inc
• Series: NDLr

Specifications of NDL4809SC

• Output Power: 2 W
• Input Voltage Range: 36 V to 72 V
• Input Voltage (nominal): 48 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 9 V
• Output Current (channel 1): 222 mA
• Isolation Voltage: 1 KV
• Package / Case Size: SIP
• Product: Isolated
• Dc / Dc Converter O/p Type: Single
• No. Of Outputs: 1
• Input Voltage: 36V To 72V
• Power Rating: 2W
• Output Voltage: 9V
• Output Current: 222mA
• Supply Voltage: 48V
• Dc / Dc Converter Case Style: SIP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION NOTES
External capacitance
Control Pin
Pin 8 (C
Minimum load
RoHS COMPLIANT INFORMATION
www.murata-ps.com
Although these converters will work without external capacitors, they are necessary
in order to guarantee the full parametric performance over the full line and load
range. All parts have been tested and characterized using the following values and
test circuit.
The NDL converters have a shutdown feature which enables the user to put the converter into a low power state. The control pin connects directly to the base of an internal
transistor, and the switch off mechanism for the NDL works by forward biasing this NPN transistor. If the pin is left open (high impedance), the converter will be ON (there is
no allowed low state for this pin), but once a control voltage is applied with suffi cient drive current, the converter will be switched OFF. A suitable application circuit is shown
below.
This pin provides a connection point to the main reservoir capacitor. Additional capacitance can be added from this pin to pin 7. Any lower ESR capacitor will remove ripple
and noise to some degree. The benefi t of this access point over simple additional output capacitance is that it precedes the output fi lter inductor. Maximum values of external
capacitance will be dependent on the output voltage, the loading of the converter and the desired ripple fi gure. Values can be up to 100μF.
The minimum load for correct operation is 25% of the full rated load across the specifi ed input voltage range. Lower loads may cause a signifi cant increase in output ripple
The minimum load for correct operation is 25% of the full rated load across the specifi ed input voltage range. Lower loads may cause a signifi cant increase in output ripple
and may cause the output voltage to exceed its specifi cation transiently during power-down when the input voltage also falls below its rated minimum.
and may cause the output voltage to exceed its specifi cation transiently during power-down when the input voltage also falls below its rated minimum.
Test circuit
For further information, please visit www.murata-ps.com/rohs
S
)
OV
V
C
-V
V
IN
IN
R
Supply + V
Supply - V
1
This series is compatible with RoHS soldering
systems with a peak wave solder temperature of
300ºC for 10 seconds. The pin termination fi nish
on this product series is Tin Plate, Hot Dipped
over Matte Tin with Nickel Preplate. The series
is backward compatible with Sn/Pb soldering
systems.
D
1
IN
IN
CTRL
C
IN
NDL
Q
1
R
2
+ V
- V
IN
IN
NDL
NDL05 POWER DERATING CURVE
+ V
Isolated 2W Wide Input Single Output DC/DC Converters
- V
D
low. From the NDL specifi cation, the drive current to operate this function
is recommended to be 10mA, and hence the value of R
follows:
R
Assuming V
R
OUT
OUT
1
1
1
=
=
(e.g. 1N4001) is required to provide high impedence when the signal is
Input Voltage (V)
Technical enquiries email: [e-mail], tel: [phone]
5 - 0.7 - 1.0
V
10 x 10
C
24 & 48
- V
5 & 12
I
C
D
1.75
C
=5V, V
2.5
2.0
1.5
1.0
0.5
- V
-3
0
Q
4.5
= 330Ω
D
=0.7V and V
5
Isolation voltage (V)
C
OUT
6
Q
=1V:
100μF, 25V
10μF, 200V
Value
C
IN
2009/10/29 KDC_NDLC.F03 Page 3 of 4
7
8
NDL Series
1
can be derived as
9
100μF, 25V
100μF, 25V
C
OUT