Datasheet

cui.com
CUI Inc │ SERIES: PQMC3-S │ DESCRIPTION: DC-DC CONVERTER date 07/07/2014 │ page 4 of 6
EMC RECOMMENDED CIRCUIT
MECHANICAL DRAWING
TEST CONFIGURATION
Note:Inputreected-ripplecurrentismeasuredwithaninductorLinandCapacitorCintosimulatesourceimpedance.
23 56781
23 56 781
Front View
Bottom View
Top View
PCB Layout
Grid Size:
2.54mm x 2.54mm
0.50[0.020]
2.54[0.100]
4.10 [0.161]
12.00
[0.472]
22.00 [0.866]
0.30 [0.012]
0.50[0.020]
17.78 [0.700]
2.50
[0.098]
9.50
[0.374]
Ø1.00 [0.039]
PIN CONNECTIONS
PIN Single Output Dual Output
1 GND GND
2 Vin Vin
3 Ctrl Ctrl
5 NC NC
6 +Vo +Vo
7 0V 0V
8 CS -Vo
units: mm[inch]
tolerance: ±0.25[±0.010]
pin section tolerance: ±0.10[±0.004]
NC: No Connection
Recommended external circuit components
Vin (Vdc) 5 12 24 48
FUSE choose according to practical input current
MOV -- -- S14K35 S14K60
LDM1 -- -- 56μH 56μH
TVS SMCJ13A SMCJ28A SMCJ48A SMCJ90A
C0 680μF/16V 680μF/25V 330μF/50V 330μF/100V
C1 4.7μF/50V 4.7μF/50V 4.7μF/50V 4.7μF/100V
LDM2 12μH 12μH 12μH 12μH
C2 4.7μF/50V 4.7μF/50V 4.7μF/50V 4.7μF/100V
CY 1nF/2kV 1nF/2kV 1nF/2kV 1nF/2kV
D1 RB160M-60/1A RB160M-60/1A RB160M-60/1A RB160M-60/1A
R Follows:aaaaa aaaaaaaaaaaa
Cd 47nF/100V 47nF/100V 47nF/100V 47nF/100V
LDM2
C0
TVS
LDM1
MOV
FUSE
C1
+
Vin
GND
+Vo
-Vo
(0V)
EUT
LOAD
C2
CY
Ctrl
Cd
D1
R
Ctrl
Vin
GND

(a) (b) (c)
300
0.1
−
−−
=
C
DC
I
VV
R
Figure 1
Table 1
Note:Figure1-cison/offcontrolcircuit.Seepage6fordetails.
DC
Cin
Lin
DC
Load
Oscilloscope
Current
Probe
Lin(4.7µH) Cin(220µF, ESR<1. 0Ω at 100KHz)
External components
Lin 4.7μH
Cin
220μF,ESR<1.0Ω
at 100 KHz
Figure 2 Table 2
For more information, please visit the product page.