EQ2320-7R POWER ONE, EQ2320-7R Datasheet - Page 5

• Manufacturer Part Number: EQ2320-7R
• Description: DC/DC Power Supply Dual-OUT 12V 9.2A 120W 15-Pin
• Manufacturer: POWER ONE
• Type: Step Downr

Specifications of EQ2320-7R

• Output Current: 9.2 A
• Output Voltage: 12 V
• Input Voltage: 65 to 150 V
• Number Of Outputs: 2
• Output Power: 120 W

BCD20011-G Rev AD, 22-Dec-09
Functional Description
The converters are designed as forward converters using
primary and secondary control circuits in SMD technology. The
switching frequency is approximately 200 kHz under nominal
operating conditions. The built-in high-efficient input filter
together with a small input capacitance generate very low
inrush currents of short duration. After transformer isolation
and rectification, the output filter reduces ripple and noise to a
minimum without compromising the dynamic ability. The
output voltage is fed to the secondary control circuit via
separate sense lines. The resultant error signal is sent to the
primary control circuit via a signal transformer.
Double-output models have the voltage regulation of output 2
relying on the close magnetic coupling of the transformer and
the output inductor together with the circuits' symmetry.
Fig. 7
Block diagram of a double-output converter
Fig. 6
Block diagram of a single-output converter
Vi+
Vi–
Vi+
Vi–
1
1
i
1
Leading pins
Leading pins
1
i
32
32
28
30
26
28
30
26
Fuse
Fuse
®
2
2
Potentiometer for option P
Potentiometer for option P
Input
filter
Input
filter
C
control circuit
control circuit
C
y
y
Primary
Primary
Isolation
Isolation
3
3
Do not connect for models with option P
Do not connect for models xQ1101 or with option P
Page 5 of 26
The current limitation is located at the primary side, thus
limiting the total output current in overload conditions. This
allows flexible loading of each output for unsymmetrical loads
in the range 10 to 90% of the total output power. In applications
with large dynamic load changes, we recommend connecting
such a load to output 1. If output 2 is not used, it should be
connected parallel to output 1. Both outputs can either be
series- or parallel-connected (see Electrical Output Data).
In normal operation, the internal control circuits are powered
by a third winding of the main choke (except 48Q models).
Startup is ensured from the input voltage by a linear regulator.
Note: When the output voltage is much lower then the nominal
value, this linear regulator is activated, generating considerable
power losses.
Output
Output
Output
monitor V
filter
filter
filter
monitor
Output
Output
C
C
y
y
o2
66 – 132 Watt DC-DC Converter
Output
control
Output
control
2
2
4
Do not connect
Q Series Data Sheet
20
20
03111a
03112a
4
4
4
Do not connect
18
16
12
10
24
18
16
10
12
14
22
24
14
22
4
6
8
6
4
8
www.power-one.com
Out OK+
Out OK–
T
R
S+
Vo+
Vo+
Vo–
Vo–
S–
Out OK+
Out OK–
T
R
Vo2+
Vo2–
S+
Vo1+
Vo1–
S–
3
3
1
1
1
1