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NE12S06A 데이터시트(PDF) 7 Page - Delta Electronics, Inc.

부품명 NE12S06A
상세설명  Fixed frequency operation
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제조업체  DELTA [Delta Electronics, Inc.]
홈페이지  http://www.deltaww.com
Logo DELTA - Delta Electronics, Inc.

NE12S06A 데이터시트(HTML) 7 Page - Delta Electronics, Inc.

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DS_NE12S06A_05202013
7
FEATURES DESCRIPTIONS (CON.)
The ENABLE input can be driven in a variety of ways as
shown in Figures 18 and 19. If the ENABLE signal comes
from the primary side of the circuit, the ENABLE can be
driven through either a bipolar signal transistor (Figure
19).If the enable signal comes from the secondary side,
then an opto-coupler or other isolation devices must be
used to bring the signal across the voltage isolation
(please see Figure 20).
ND6A/10A
Vout
Ground
Trim
Enable
Ground
Vin
Figure 19: Enable Input drive circuit for NE series
Ground
Ground
ND 6A/10A
Vin
Vout
Trim
Enable
Figure 20: Enable input drive circuit example with isolation.
Input Under-Voltage Lockout
The input under-voltage lockout prevents the converter
from being damaged while operating when the input
voltage is too low. The lockout occurs between 2.8V to
3.1V.
Over-Current and Short-Circuit Protection
The NE series modules have non-latching over-current
and short-circuit protection circuitry. When over current
condition occurs, the module goes into the non-latching
hiccup
mode.
When
the
over-current
condition
is
removed, the module will resume normal operation.
An over current condition is detected by measuring the
voltage drop across the MOSFETs. The voltage drop
across the MOSFET is also a function of the MOSFET’s
Rds(on). Rds(on) is affected by temperature, therefore
ambient temperature will affect the current limit inception
point.
The detection of the Rds(on) of
MOSFETs also acts as
an over temperature protection since high temperature
will cause the Rds(on) of the MOSFETs to increase,
eventually triggering over-current protection.
Output Voltage Programming
The output voltage of the NE series is trimmable by
connecting an external resistor between the trim pin and
output ground as shown Figure 21 and the typical trim
resistor values are shown in Figure 22.
Vin
Vout
Enable
Ground
Ground
Trim
ND 6A/10A
Rs
Figure 21: Trimming Output Voltage
The NE06 module has a trim range of 0.59V to 5.0V.
The trim resistor equation for the NE06A is :
592
.
0
1184
)
(
Vout
Rs
Vout is the output voltage setpoint
Rs is the resistance between Trim and Ground
Rs values should not be less than 24
Output Voltage
Rs
(Ω)
0.59V
open
+1 V
2.9k
+1.5 V
1.3K
+2.5 V
619
+3.3 V
436
+5.0V
268
Figure 22: Typical trim resistor values
NE6A/10A
NE6A/10A
NE6A/10A


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