Rev. P05
5
VPN12AD02-FU EVB GUIDE
Constant Voltage Application
ELECTRICAL SPECIFICATION:
Parameters
Value
Note
Output Voltage
12V
Input UVLO Falling
7V
Input UVLO Rising
7.4V
Output OVP
15V
Output Short
6V
PROGRAMMING OUTPUT VOLTAGE:
Input UVLO Setting
Input under voltage shutdown levels can both be defined through an external resistor divider.
EN/INUVLO pin voltages are internally compared to their respective thresholds shown as the following
equations. It is recommended that choose R2=10kohm, and R1 can be calculated by following equation.
Input under voltage falling threshold V
EN/INUVLOTH
typical is 1.75V for calculating the VIN UVLO falling.
Input under voltage threshold hysteresis V
EN/INUVLO_HYS
typical is 90mV for calculating the VIN UVLO
rising. Following is some examples for R1, R2 selection.
UVth =
R1
R2
(
+
) V
EN/INUVLOTH
1
.
Table 6: Parameter Value Setting
VIN UVLO Falling
7V
VIN UVLO Rising
7.4V
R1 (
Ω
)
30k
R2 (
Ω
)
10k
Output OVP Setting
The output OVP can be set by the external dividing resistor. VFB typical value is 1.46V. Following are
some output voltage examples.
R22 = R23 x ( -1)
VOUT_OVP
VFB
