Boost Circuit Design
i
0 2
degC
1
r
0.4
T0
85 degC
k
Vf
103
0.3 V
μ
η
10 6
0.8
n
4
M 10
L1
22 μ H
Diode:
IF
3 A
D_Rthja
50
degC
W
D_VF
0.7 V
T_max
Input Voltage:
Output Voltage:
Output Current::
Frequency :
150 degC
Vin_min
(
Vout
8.2 V
2.65 V
Vin_max
3.4 V
12 V
) M
2.95 V
Iout
Fosc
0.08 n A
(
0.8 1 1.2
Iout_max
)800 k Hz
Iout
Vout_typ Vout0 1
Vout_typ
29.5V
D 0.778
Fosc_min
Fosc0 0
D
1
ΔIL
Ipk
Vin_min η
Vout_typ
Iout_max
r
1 D
Iout_max
1 D
ΔIL
2
ΔIL
0.576 A
Ipk
1.727 A
ILIM_min
1.8 A
Ipk_max
Ipk
if Ipk_max
(
ILIM_min
"Ipk too larger"
"Ipk is OK"
Vin_min Vout_typ Vin_min
)
(
L0
ΔIL Fosc0 0
Vout_typ
10 5
H
L0
1.607
)
"Ipk is OK"
if L1 0.8
(
L0
"L=22uH is OK"
"FAIL"
)
"L=22uH is OK"
Diode:
if IF
(
Iout_max
"Diode IF OK"
PD Iout_max D_VF
TD
T0
"Diode Thermal OK"
"IF is too small"
PD 0.224 W
TD 96.2
)
"FAIL"
PD D_Rthja
if TD T_max
(
)
"Diode IF OK"
"Diode Thermal OK"
Iout_max D
ΔVout
2
104
μ V
Capacitance:
Cout_min
Cout_min
Fosc_min ΔVout
1.944
F
10 5
0.017 V
ESR
Iout_max
1 D
ΔVout_ESR
ΔVout_ESR
ESR
0.01 Ω
ΔIL
2