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參數(shù)資料
| 型號： | LSM-1.5/16-W3-C |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, SMT-6 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 427K |
| 代理商： | LSM-1.5/16-W3-C |
“T” Model (LSM-T/16-W3)
This version of the LSM-W3 series offers a special output voltage trimming
feature which is fully compatible with competitive units. The output voltage
may be varied using a single trim resistor from the Trim input (pin 5) to Power
Common (pin 3). The output voltage range is 0.75 Volts to 3.3 Volts.
IMPORTANT: For outputs greater than 3 Volts up to 3.3 Volts maximum, the
input supply must be 4.5 Volts minimum.
As with other trim adjustments, be sure to use a precision low-tempco resistor
(±100 ppm/°C) mounted close to the converter with short leads. Also be aware
that the output voltage accuracy is ±2% (typical) therefore you may need to
vary this resistance slightly to achieve your desired output setting.
The trim equation is as follows for the LSM-T/16-W3:
LSM-T/16-W3 xed resistance values to set the output voltages are:
VOUT (Typ.)
0.75V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
RTRIM (k )
Open
80.021
41.973
23.077
15.004
6.947
3.16
CAUTION: To retain proper regulation, do not exceed the 3.3V output.
Voltage Trim
The LSM-T/16-W3 may also be trimmed using an external voltage applied
between the Trim input and Output Common. Be aware that the internal “l(fā)oad”
impedance looking into the Trim pin is approximately 5k . Therefore, you may
have to compensate for this in the source resistance of your external voltage
reference.
The equation for this voltage adjustment is:
VTRIM (in Volts) = 0.7 –(0.1698 x (VO – 0.7525))
The LSM-T/16-W3 xed trim voltages to set the output voltage are:
VOUT (Typ.)
0.75V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
VTRIM
Open
0.6928V
0.624V
0.5731V 0.5221V 0.4033V
0.267V
Figure 6. Trim Connections Using a Trimpot
Note: Resistor values are in k . Accuracy of adjustment is subject to toler-
ances of resistors and factory-adjusted, initial output accuracy. VO = desired
output voltage. VONOM = nominal output voltage.
Figure 7. Trim Connections Using Fixed Resistors
Note: Install either a xed
trim-up resistor or a xed
trim-down resistor depending
upon desired output voltage.
Trim Equations
RTRIM ( ) = _____________ –5110
VO – 0.7525
21070
LSM-16A W3 Models
Non-Isolated, Wide Input SMT DC/DC Converters
MDC_LSM-16A_W3.A04 Page 6 of 12
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
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