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| 型號(hào)： | LA5679T |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 0.03 A SWITCHING CONTROLLER, 320 kHz SWITCHING FREQ-MAX, PDSO36 |
| 封裝： | 0.275 INCH, TSSOP-36 |
| 文件頁(yè)數(shù)： | 11/14頁(yè) |
| 文件大?。?/td> | 199K |
| 代理商： | LA5679T |
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LA5679T
No.7619-6/14
Output stage
(1) For Ch1
Output current IOUT1 (sink) of Ch1 can be set freely by means of the resistance of ISET1 to GND and can be
represented as follows:
IOUT1 =
[A]
With VBE1 = VBE2,
IOUT1 =
[A]
As VBE2 changes with IOUT1 and thus VBE1 = VBE2 is not necessarily established, refer to the IOUT (sink)-
RSET characteristics for setting of RSET1.
IOUT1 sink current
(2) For Ch2 (and for Ch3)
Output current IOUT2 (source) can be set freely by means of the resistance of ISET2 to GND and can be
represented as follows:
IOUT2 =
× 61.4 [A]
When VBE1=VBE2,
IOUT2 =
× 61.4 [A]
* The equation is for Ch2. The same applies to Ch3.
As VBE2 varies with ISET2, VBE1 is not always equal to VBE2. Besides, the current magnification of 61.4 varies
slightly with VSET2 and IOUT2. Refer to IOUT (source)-RSET characteristic when setting RSET.
0.1+VBE1
VBE2
RSET2
0.1
RSET2
VBIAS1
OUT1
CAPL
CAPH
0.1V
ISET1
VBE1
VBE2
IOUT1
RSET1
VSET
0.4+VBE1
VBE2
RSET2
0.4
RSET2
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