ON Semiconductor NCD57253GEVB, Руководство пользователя

Страница: 5 / 20

NCD57253GEVB
www.onsemi.com
5
Figure 4. External Power Supply (No On Board DC
−
DC Converters)
Signal Inputs (INA, INB)
To prevent output pulse trimming, NCD57253 is
equipped by resettable input functionality.
This function is active when the UVLO or the DISABLE
function is detected.
OUTx will stay LOW until rising edge is detected on the
INx.
Signal Inputs Setup (ANB SET, DT SET)
Complementary Output Setup (ANB)
This function provides complementary signal output from
one PWM input signal on INA.
•
Set ANB SET jumper to ON to activate the function,
B
−
IN jumper should be set to the INA to ensure proper
input signal rising edge reset after UVLO conditions have
disappeared or DISABLE has been deactivated.
•
ANB SET should be set to OFF when G
−
A and G
−
B are
controlled individually by INA and INB (along with
DISABLE and DT).
Deadtime (DT)
The function provides complementary output signals with
defined deadtime based on the value of the external resistor
R7 (connected between DT pin and GND). The deadtime
can be estimated as t
DT
(ns) ≈ 10 x R
DT
(k W ).
If minimum dead time is required, DT SET should remain
float (see Table 2).
•
If DT SET is set to OFF, the deadtime control is disabled.
Outputs are controlled by inputs with respect to other
settings such as ANB SET, IN
−
B.
•
If DT SET is set to DT, the deadtime control is active.
Outputs are controlled by inputs with added deadtime.