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參數(shù)資料
| 型號： | MM1548 |
| 廠商： | MITSUMI ELECTRIC CO LTD |
| 元件分類： | 電源管理 |
| 英文描述： | Secondary Control for Energy-Saving AC Adaptor Monolithic IC |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | SOT-26A, 6 PIN |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 132K |
| 代理商： | MM1548 |
MITSUMI
Secondary Control for Energy-Saving AC Adaptor MM1548
2.2 for Constant current detection (RCS adjust method)
Constant current value is set by RCS value as load detection resistor.
On the design, constant current operation changes when [load current] > 520[mA] in the case of 0.22
use.
[Formula]
[Constant current control] = V
CS1
/ RCS
[Drop curve] = V
CS2
/ RCS
(V
CS1
= 114.4mV)
(V
CS2
= 34mV)
200
300
400
500
600
700
800
900
1000
1100
1200
I= (VCS1) / RCS
RCS(constant current detection resistor) - constant current control value
c
RCS(constant current detection resistor) [
]
0.1
1.0
min.
typ.
max.
0.22
2.3 Description of load detection and energy saving detection (R
L
S adjust method)
Load detection current and energy saving detection current is set by R
L
S as load detection resistor.
On the design, each current changes when [current flows through R
L
S] > 240μA, in the case of 470
use.
[Formula]
[Load detection current]
= ( V
LSP1
/ R
L
S)
[Energy saving detection current] = ( V
LSP2
/ R
L
S)
( V
LSP1
= 200mV)
( V
LSP2
= 115mV)
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
I= ( V
LSP2
) / RLS
R
L
S (Load detection resistor) - Energy saving detection current
E
μ
A
R
L
S (Load detection resistor) [k
]
0.1
10
1
min.
typ.
max.
470
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