參數(shù)資料
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): 14/14頁(yè)
文件大?。?/td> 199K
代理商: LA5679T
LA5679T
No.7619-9/14
Method to set the soft start time
(1) For Ch1
The Ch1 soft start time is set with a capacity connected between DTC pin and VREF.
tSOFT1 =
1n
[s]
(2) For Ch2 (and Ch3)
The Ch2 soft start time is set with a capacity connected between DTC2 and 3 pins and GND.
* Figure shows a case with Ch2 as well as a case with Ch3.
tSOFT2 = CSOFT2R2 1n (1
) [s]
* The equation is for Ch2. The same applies to Ch3.
CSOFT1R1R2
R1+R2
VDTC1 (R1+R2)
R2VREF
R1VREF
VDTC2
VREF
VDTC2
R1
R2
VTH1_DTC
DTC1
VREF
VDTC1
VTH2_DTC
Triangular input waveform of
PWM comparator
VDTC1 waveform
VREF
Soft start time tSOFT
R1
R2
CSOFT1
VTH3_DTC
DTC2
VREF
VDTC2
VTH4_DTC
Triangular input waveform of
PWM comparator
VDTC2 waveform
Soft start time tSOFT
R1
R2
CSOFT2
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