NQ60T60QGC20NKC-G SYNQOR [SynQor Worldwide Headquarters], NQ60T60QGC20NKC-G Datasheet - Page 8

• Manufacturer Part Number: NQ60T60QGC20NKC-G
• Description: Quarter-brick DC-DC Converter
• Manufacturer: SYNQOR [SynQor Worldwide Headquarters]

Product # NQ60x60QGC20
APPLICATION CONSIDERATIONS
Limited output voltage resolution: The internal voltage
control feedback loop has limited resolution. Therefore, the
output voltage will exhibit discrete steps as the loop responds
to changes in line, load, trim, or remote sense. For instance,
on close examination, the startup ramp has a “stair-step”
shape. Likewise, a load transient response will be composed
of multiple discrete steps.
Input filtering:
low-impedance source. A highly inductive source can affect the
stability of the module. An input capacitance must be placed
directly adjacent to the input pin of the module, to minimize
input ripple voltage and ensure module stability.
Output capacitance: For stable operation of the module, there
is no extra external capacitor required. To reduce the output
ripple and improve dynamic response to a step load change,
additional capacitance at the output can be used. Low ESR
polymer and ceramic capacitors are recommended to improve
the dynamic response of the module. In many applications,
however, additional external output capacitance is a requirement
which will cause the startup time to change.
Remote sense (S option): Vout remote sensing is provided
to achieve proper regulation at the load points and reduce
effects of distribution losses on output line. In the event of an
open remote sense line, the module shall maintain local sense
regulation through an internal resistor. The module shall correct
for a total of 10% Vout.
Current limit: Available power is limited by output current
in buck mode (V
(V
where I
Negative output:
negative output (see Figure B).
Technical Specification
in
<V
out
max
).
for V
for V
= Maximum rated output current
in
in
>
<
V
I
in
I
V
limit
out,
limit
>V
out,
These modules should be connected to a
out
= 1.2 x I
This series of converters can be set to
= 1.2 x I
), but by input current in boost mode
Phone [phone]
max
max
(
V
V
out
in
)
www.synqor.com
Figure B: Negative output setup
Using this negative output setup impacts the available output
voltage range and current limit.
The output voltage range becomes 0 to V
rent limit is scaled by:
Current monitor/trimmable current limit (C option): In
addition to voltage trim, the C option offers an adjustable current
limit input and a current monitor output. The C option also
includes an ideal diode circuit in series with the Vout+ pin that
prevents reverse current flow. This enables applications such as
battery charging, current sharing, and current read back.
Figure C: Current monitor/trimmable current limit setup
The R
function to the S option.
The R
to the following equation:
Alternatively, the I
source:
The I
figure 10. This pin has a 10kOhm output impedance.
Cin1
Vin+
Cin
Vin-
Vin+
R
adjItrim
mon
If I
trim-up
adjItrim
Doc.# 005-NQ6060W Rev. B
where I
limit
pin voltage tracks the output current, as shown in
1
2
3
resistor reduces the output current limit, according
1
2
3
resistor increases the output voltage, identical in
is less than I
=
Vin+
ENABLE
Vin-
V(pin5) = 2.085(I
Vin+
ENABLE
Vin-
[(
converter
trim
trim
Dc/dc
0.0469 I
1.153 I
is the desired current limit setpoint
(V
converter
pin can be driven from an external voltage
Dc/dc
in
V
Package:
I
Vout+
I
Outputs:
TRIM
TRIM
Vout- 4
Current:
+ V
Cin2
MON
V
trim
max
in
max
Input:
, then I
out
8
7
6
5
SENSE+
+ I
+ I
trim
)
SENSE-
Vout+
TRIM
Vout- 4
trim
/I
trim
R
limit
max
adjIlim
)
03/16/09
9 - 60 V
0 - 60 V
20 A
Quarter-brick
) + 0.0953
10200 - 10
takes precedence.
8
7
6
5
max
I
R
MON
trim-up
- V
Rtrim-up
in
, and the cur-
]
Vout+
Cout
(Ω)
Vout-
Vin-/
Vout+
Cout1
Vout-
Page 8