IL6083 IK Semicon Co., Ltd, IL6083 Datasheet - Page 4

• Manufacturer Part Number: IL6083
• Description: Pwm Power Control Ic With Interference Suppression
• Manufacturer: IK Semicon Co., Ltd

Example for Oscillator
Frequency Calculation
Calculation Example
The above mentioned threshold voltages are calculated for the following values given in the data sheet.
Oscillator Frequency
3 cases have to be distinguished
1. f
2. f
oscillator frequency, f, is as follows:
3. f
Electrical parameters are given for temperature range from minus 40 to + 110° С and V
Operation is guaranteed for Vbatt from 6 to 9V. All electrical parameters are specified relatively to “common”
output (02).
By selecting different values of C
2000 Hz as shown in the data sheet.
1
2
3
for duty cycle < 100%, no slope reduction with capacitor C
with duty cycle < 100% with slope reduction capacitor C
for duty cycle = 100%, no slope reduction with capacitor C
Switching thresholds
V
V
V
V
V
V
where
α
V
V
V
V
T100
T100
T<100
T<100
TL
TL
Batt
T100
T<100
TL
1
, α
= 11.4 V x 0.28 = 3.2 V
= Low switching threshold
= V
= 12 V, I
= High switching threshold (100% duty cycle)
= V
= (12 V - 4 mA x 150 Ω) x 0.7 ≈ 8 V
2
= High switching threshold (< 100% duty cycle)
= V
= 11.4 V x 0.67 = 7.6 V
and α
S
S
x α
S
x α
x α
3
S
3
= (V
1
2
= 4 mA, R
are fixed values
= (V
= (V
Batt
Batt
Batt
- I
- I
- I
S
S
x R
3
S
= 150 Ω, α
2
x R
x R
and C
3
) x α
3
3
) x α
) x α
4
3
, it is possible to have a range of oscillator frequencies from 10 to
1
2
1
= 0.7, α
2
= 0.67 and α
4
(see “Output Slope Control”)
4 .
4
(see Figure 4)
For a duty cycle of less than 100%, the
3
= 0.28
batt
. From 9 to 16,5V.
Rev. 00
IL6083