HA16120 RENESAS [Renesas Technology Corp], HA16120 Datasheet - Page 18

• Manufacturer Part Number: HA16120
• Description: Switching Regulator for Chopper Type DC/DC Converter
• Manufacturer: RENESAS [Renesas Technology Corp]

HA16114P/PJ/FP/FPJ, HA16120FP/FPJ
7.4 Examples of Intermittent Mode Timing (calculated values)
Rev.2.0, Sep.18.2003, page 18 of 37
(2) T
Example:
T
Here, coefficient
T
from section 7.3 (2) previously.
OFF
OFF
2
= ln
(1) T
= T
T
Here, coefficient
T
from section 7.3 (1) previously.
Example: If C
V
ON
V
ON
1
2
IN
IN
= 0.69
If C
R
then T
= T
A
C
2V
ON/
= 390 k , V
V
ON/
1
BE
BE
OFF
OFF
OFF
R
of the current limiter is 75%,
then T
C
Figure 7.4 Examples of Intermittent Mode Timing (1)
Figure 7.5 Examples of Intermittent Mode Timing (2)
1
B
ON/
= 2.2 F, R
= 2.2 k , and the on duty
ON/
= 55 ms.
(R
OFF
On duty
ON
1
OFF
A
IN
+ R
= 13 ms.
= 12 V,
= 2.2 F,
R
B
B
)
B
= 2.2 k ,
T
0.05
2
0.1
0
0
T
1
8
6
4
2
0
0
10
20
(PWM) On duty (%)
V
IN
(V)
40
20
60
80
30
100
40