参数资料
型号: MC33063DFBCKGEVB
厂商: ON Semiconductor
文件页数: 11/15页
文件大小: 0K
描述: EVAL BOARD FOR MC33063DFBCKG
设计资源: MC33063DFBCKGEVB BOM
MC33063DFBCKGEVB Schematic
MC33063DFBCKGEVB Gerber Files
特色产品: Evaluation Boards & Kits
标准包装: 1
主要目的: DC/DC,步降
输出及类型: 2,非隔离
输出电压: 5V
电流 - 输出: 1.5A
输入电压: 12V
稳压器拓扑结构: 降压
频率 - 开关: 100kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: MC33063
其它名称: MC33063DFBCKGEVBOS
MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A
Calculation
Step ? Up
Step ? Down
Voltage ? Inverting
in(min)
* V
* V sat
in
t on /t off
V out ) V F
V
in(min)
* V sat
V
V out ) V F
in(min) * V sat * V out
|V out| ) V F
V
ton
) 1
off
ton
) 1
off
ton
) 1
off
(t on + t off )
t off
t on
1
f
t on ) t off
t
(t on + t off ) ? t off
1
f
t on ) t off
t
(t on + t off ) ? t off
1
f
t on ) t off
t
(t on + t off ) ? t off
C T
4.0 x
10 ? 5
t on
4.0 x
10 ? 5
t on
4.0 x 10 ? 5 t on
off
off
I pk(switch)
2I
out(max)
t on
t
) 1
2I
out(max)
2I
out(max)
t on
t
) 1
R sc
0.3/I pk(switch)
0.3/I pk(switch)
0.3/I pk(switch)
pk(switch)
pk(switch)
L (min)
(V
I
in(min) * V sat)
t
on(max)
(V
in(min)
I
* V sat * V out)
pk(switch)
t
on(max)
(V
I
in(min) * V sat)
t
on(max)
pk(switch) on
ripple(pp)
off
C O
9
V
I outt on
ripple(pp)
I
8V
(t ) t
)
9
V
I outt on
ripple(pp)
V out ? Desired output voltage, |V out | + 1.25 1 ) R2
I out ? Desired output current.
V sat = Saturation voltage of the output switch.
V F = Forward voltage drop of the output rectifier.
The following power supply characteristics must be chosen:
V in ? Nominal input voltage.
R1
f min ? Minimum desired output switching frequency at the selected values of V in and I O .
V ripple(pp) ? Desired peak ? to ? peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its
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.
NOTE: For further information refer to Application Note AN920A/D and AN954/D.
Figure 17. Design Formula Table
http://onsemi.com
11
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