ha16116fpj Renesas Electronics Corporation., ha16116fpj Datasheet - Page 20

• Manufacturer Part Number: ha16116fpj
• Description: Switching Regulator For Chopper Type Dc/dc Converter
• Manufacturer: Renesas Electronics Corporation.

HA16116FP/FPJ, HA16121FP/FPJ
Overcurrent Detection Value Setting
The overcurrent detection value V
The power MOS FET peak current value before the current limiter goes into operation is derived from the
following equation.
Here V
Note that C
from current spikes when the power MOS FET is turned on or off.
The sample values given in this figure are calculated from the following equation.
The filter cutoff frequency is calculated as follows.
Rev.2.0, Sep.18.2003, page 20 of 33
TH
I
I
f
D
= V
To other
circuitry
C
D
200 A
=
=
=
F
and R
IN
V
0.2 V
2 C
TCL
– V
S.V
1
F
CL
CS
IN
1 k
R
(R
= 0.2 V, V
form a low-pass filter, determined by their time constants, that prevents malfunctions
(240
F
R
F
=
CS
+ R
6.28
(internal)
0.05
OUT
CS
+ 0.05 )
IN( )
) I
Detection
output
V
CL
Figure 8.1 Example for Step-Down Use
CL
1800 pF
BCL
TH
is a voltage referd on GND.
for this IC series is 0.2 V (Typ) and the bias current is 200 µA (Typ)
1
CL
+
200 A
C
240
F
1800 PF
= 3.04 [A]
R
240
I
F
= 370 [kHz]
BCL
G
D
S
R
0.05
CS
+
V
IN
This circuit is an example
for step-down output use.
V
O