D12S300-1 Datasheet, PDF (8/13 Pages) Delta Electronics, Inc. – 4.5V~13.8Vin, 0.6V~5.0Vout, 60A

FEATURES DESCRIPTIONS (CON.)
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 4.1V to
4.5V.
Over-Current and Short-Circuit Protection
The D12S300-1 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 inductor. The voltage drop across
the inductor is also a function of the inductor’s DCR.
Note that none of the module specifications are
guaranteed when the unit is operated in an over-current
condition.
Remote Sense
The D12S300-1 provides Vo remote sensing 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 0.6V of loss. The remote sense connects
as shown in Figures 27.
Figure 27 : Circuit configuration for remote sense
DS_D12S300-1_12282009
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 28 and the typical trim
resistor values are shown in Table 1.
Unit
Vin
Enable
GND
Vout
Trim(+)
Trim(-)
Rtrim
Figure 28: Trimming Output Voltage
The D12S300-1 module has a trim range of 0.6V to
5.0V. The trim resistor equation for the D12S300-1 is:
Rs(Ω) = ¹²⁰⁰
Vout − 0.6
Vout is the output voltage setpoint
Rs is the resistance between Trim and Ground
Rs values should not be less than 270Ω
Output Voltage
0.6V
+0.9V
+1.2V
+1.5 V
+1.8V
+2.5 V
+3.3 V
+5.0V
Rs (Ω)
open
4K
2K
1.33K
1K
631.6
444.4
272.7
Table 1: Typical trim resistor values
Power Good
The converter provides an open collector signal called Power
Good. This output pin uses positive logic and is open
collector. This power good output is able to sink 5mA and set
high when the output is within 10% of output set point. The
power good signal is pulled low when output is not within
±10% of Vout or Enable is OFF.
8