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參數(shù)資料
| 型號： | XC9505B092A |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | 2ch. Step-Down / Inverting DC/DC Controller ICs |
| 中文描述： | 2通道。降壓/反向DC / DC控制器芯片 |
| 文件頁數(shù)： | 10/47頁 |
| 文件大?。?/td> | 705K |
| 代理商： | XC9505B092A |
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Notes on how to use
Hint on application
1. Channel 2 ( Inverting )
Channel 2 (inverting) is subject to the overshoot of output voltage 2 (VOUT 2) at start-up. It is possible to control the overshoot of
output voltage 2 (VOUT 2), as shown by circuit example 1 in “Output Voltage Settings for Channel 2” in “Function Settings.”
In this
circuit configuration, EN 1 and EN 2 are enabled (set to “H” level) simultaneously. This lets output voltage 1 (VOUT 1) of channel 1
increase gently as soft start, thereby controlling the overshoot.
Soft start circuit
> Example of typical application circuit : Improved Soft start
This example is effective when EN 1 and EN 2 are enabled with different timings under light load condition (the coil current being
discontinuous).
Time to make soft start time is calculated by the equation below.
Example )
When VOUT1 = 3.3V and VOUT2 = - 7.5V,
RFB21 = 350k
, RFB22 = 100k
by the equation below.
VOUT2 = (0.9 - VOUT1) x (RFB21 / RFB22) + 0.9
When the light load, CFB21=0.1
μ
F or lower value can be used.
Therefore, when CFB21=0.027
μ
F,
Time_ss2 = 5.0mS and VOUT2 = 95% of setting value
2. Channel 2 (Inverting)
The voltage applied between the drain and source is the sum of VIN and VOUT 2.
Select a transistor with an absolute VDSS rating that is suitable for your operating conditions.
Example: The voltage applied across VDS of a transistor will be 20.0V if VIN = 5.0 V and VOUT 2 = -15.0 V.
Under this condition, a transistor with VDSS higher than 20.0V should be selected. (Use a transistor with VDSS
that is 1.5 times the applied voltage or more, as a standard.)
Withstand voltage of transistor
XC9505 Series
2ch. Step-Down / Inverting DC/DC Controller ICs
SBD2
VOUT1
FB2
Inside of
XC9505 IC
RFB21
CFB21
VOUT2
CL2
RFB22
EN2
ON/OFF
signal
Pch
MOSFET1
R1
Nch
MOSFET2
Time
SS2 =
- R
FB21
x C
CFB21
/ Ln 1 -
(0.9 - V
OUT2
) x R
FB22
)
(V
OUT1
- 0.9) x R
FB21
10
相關PDF資料 |
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| XC9505B093A | 2ch. Step-Down / Inverting DC/DC Controller ICs |
| XC9505B095A | 2ch. Step-Down / Inverting DC/DC Controller ICs |
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| XC9509A033AL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033AR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9505B093A | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch. Step-Down / Inverting DC/DC Controller ICs |
| XC9505B095A | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch. Step-Down / Inverting DC/DC Controller ICs |
| XC9508 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
| XC9508_1 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Series Plus Voltage Detector |
| XC9508AXXXXX | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
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