参数资料
型号: GM34063S8T
厂商: American Power Management Inc.
英文描述: 1.5A DC-TO-DC CONVERTER CONTROL CIRCUIT
中文描述: 1.5A的直流到直流转换器控制电路
文件页数: 5/16页
文件大小: 262K
代理商: GM34063S8T
G
M
3
4
0
6
3
13
DESIGN FORMULAS
Calculation
Step - Up
Step - Down
Voltage - Inverting
t
/ t
on
off
(t
+ t )
on
off
V
+ V - V
out
F
IN(min)
V
- V
IN(min)
sat
V
+ V
out
F
V
- V
IN(min)
sat -Vout
IV
I + V
out
F
V
- V
IN
sat
1
f
t
off
t
+ t
on
off
t
on
t
off
+ 1
t
on
(t
+ t ) -
on
off
t
on
C
T
-5
4.0 x 10 t
on
I
pk(switch)
C
O
2 I
(
)
out(max)
t
on
t
off
+ 1
2 I
out(max)
R
SC
0.3/ I
pk(switch)
L
(min)
(V
- V
)
IN(min)
sat
I
pk(switch)
(
) t
on(max)
9
It
out on
V
npple(pp)
I
(t
+ t )
pk(switch)
on
off
8V
ripple(pp)
V
= Saturation voltage of the output switch.
sat
V = Forward voltage drop of the output rectifier.
F
V
- Nominal input voltage.
IN
V
- Desired output voltage,
out
I
- Desired output current.
out
f
- Minimum desired output switching frequency at the selected values of V
and I .
min
IN
O
V
- Desired peak-to peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its
ripple(pp)
equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and
load regulation.
1
f
1
f
(t + t ) -
on
off
t
on
2 I
(
)
out(max)
t
on
t
off
+ 1
9
It
out
on
V
ripple(pp)
-5
4.0 x 10 t
on
0.3/ I
pk(switch)
(V
-
V
)
IN(min)
out
V-
sat
I
pk(switch)
(
) t
on(max)
t
+ t
on
off
t
on
t
off
+ 1
t
+ t
on
off
t
on
t
off
+ 1
(t + t ) -
on
off
t
on
-5
4.0 x 10 t
on
0.3/ I
pk(switch)
(V
- V
)
IN(min)
sat
I
pk(switch)
(
) t
on(max)
A
MICROELECTRONICS
GM34063
1.5A DC-to-DC CONVERTER CONTROL CIRCUIT
Power Management
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