參數(shù)資料
型號(hào): S-8328
廠商: Seiko Instruments Inc.
英文描述: CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開關(guān)穩(wěn)壓器)
中文描述: 的CMOS PWM / PFM切換,控制升壓型開關(guān)穩(wěn)壓器的CMOS(PWM / PFM切換控制步升開關(guān)穩(wěn)壓器)
文件頁數(shù): 52/68頁
文件大?。?/td> 647K
代理商: S-8328
51
The minimum value (VEEmin.) and maximum value (VEEmax.) of the output-voltage adjustment range
are defined as follows:
1.
Disregard Tr2 and RE, and set RA, RB, and CC such that the output voltage will be less than
VEEmin. The procedure for this should comply with FAQ No. 11S8323007. (In particular, use of the
software is recommended.)
2.
Then, set an RE that will allow the output voltage to exceed VEEmax. when Tr2 comes on. Such a
value can be found using the following equation, where OUTmin. is the minimum deviation value
(OUTmin. resulting from software calculation) of the voltage VEE computed in 1. above, VDACmax.
is the maximum value of the DAC output, and VBE is the base-emitter voltage of Tr2. (However,
deviations in the resistance values of RA and RB must be taken into consideration.)
(
)
(
)
OUTmin
VEEmax
-
RA
×
VBE
VDACmax
RE
Tr2 is a transistor designed for small signals. Select one that features a withstand voltage that is
higher than the output voltage VEE to be set. Moreover, select an output voltage VOUT of the S-
8327/8E that will allow the following condition to be met and will not allow saturated operation of
Tr2.
VOUT
VDACmax+VBE
<Remarks>
FAQ No.: 11S8323012
-
相關(guān)PDF資料
PDF描述
S-8330 Step-Up Switching Regulator For LCD Bias Supply(用于LCD偏置電源的步升開關(guān)穩(wěn)壓器)
S-8331 Step-Up Switching Regulator For LCD Bias Supply(用于LCD偏置電源的步升開關(guān)穩(wěn)壓器)
S-8340 PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制,高頻步升開關(guān)穩(wěn)壓器-控制器)
S-8340A PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制,高頻步升開關(guān)穩(wěn)壓器-控制器)
S-8340B PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制,高頻步升開關(guān)穩(wěn)壓器-控制器)
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