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參數(shù)資料
| 型號： | XC9504B093CDL |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| 中文描述： | 2通道。升壓/負(fù)輸出DC / DC控制器芯片 |
| 文件頁數(shù)： | 11/53頁 |
| 文件大小： | 3047K |
| 代理商： | XC9504B093CDL |
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11/53
XC9504
Series
NOTES ON USE (Continued)
Hint on application
1. Channel 1 (Step-Up) How to shut down the output voltage during standby mode
If the circuit configuration shown as an example of typical application circuits is used, voltage V
IN
will occur at V
OUT1
when
the IC is in standby, the diode being bypassed. This can cause circuits connected to V
OUT1
to malfunction.
> Example of typical application circuit 1:
VOUT1
MOSFET1
Set R1 so as to prevent leakage current of N-ch MOSFET 2.
> Example of typical application circuit 2: Power Ready Function
The combination of R 2, C 1, and the threshold
voltage of approximately 0.7 V of NPN Bip 1 is
used to produce a delay time between the
circuits being enabled and P-ch MOSFET 1
being switched on. Delay time set to 20ms
ensures power to be made ready in a favorable
manner, as soft start of this product is
completed during the delay time.
Set Value (Example)
VOLTAGE (V)
2.5
3.3
5.0
R2 (k
Ω
)
430
470
430
C1 (
μ
F)
0.15
0.18
0.33
Time to make power ready is calculated by the equation below.
Time = - R2 x C1 x Ln (1 - 0.7 / [ON / OFF Signal Voltage ]
Set R1 so as to prevent leakage current of NPN (Bip 1).
N-ch MOSFET 2 and the inverter enables power to be turned off quickly.
2. Channel 2 (Inverting): Soft start circuit
Channel 2 (inverting) is subject to the overshoot of output voltage 2 (V
OUT2
) at start-up. It is possible to control the
overshoot of output voltage 2 (V
OUT2
), 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 (V
OUT1
) of channel 1 increase gently as soft start, thereby controlling the overshoot.
> 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).
SBD1
FB1
EN1
Pch
Inside of
XC9504 IC
RFB11
RFB12
CL1
CFB1
Nch
MOSFET2
ON/OFF
signal
R1
VOUT1
SBD1
FB1
EN1
Pch
MOSFET1
RFB11
RFB12
CFB1
CL1
R1
R2
C1
NPN
Bip1
Nch
MOSFET2
Inside of
XC9504 IC
ON/OFF
signal
SBD2
VOUT1
FB2
Inside of
XC9504 IC
RFB21
CFB21
VOUT2
CL2
RFB22
EN2
ON/OFF
signal
Pch
MOSFET1
R1
Nch
MOSFET2
Time to make soft start time is calculated by the equation below.
Time
ss2
= -R
FB21
C
FB2
1 / Ln 1 –
Example)
When
V
OUT1
= 15V and V
OUT2
= - 7.5V,
R
FB21
= 59.6k
, R
FB22
= 100k
by the equation below.
V
OUT2
= (0.9 - V
OUT1
) x (R
FB21
/ R
FB22
) + 0.9
When the light load, C
FB21
=0.1
F or lower value can be used.
Therefore, when C
FB21
=0.027
F,
Time_ss2 = 5.0ms and V
OUT2
= 95% of setting value
(0.9-V
OUT2
)
(V
OUT1
– 0.9)
R
FB22
)
R
FB21
)
3. Channel 2 (Inverting): Withstand voltage of transistor
The voltage applied between the drain and source is the sum of V
IN
and V
OUT2
. Select a transistor with an absolute V
DSS
rating that is suitable for your operating conditions. Example: The voltage applied across V
DS
of a transistor will be 20.0V if
V
IN
= 5.0 V and V
OUT2
= -15.0 V. Under this condition, a transistor with V
DSS
higher than 20.0V should be selected. (Use
a transistor with V
DSS
that is 1.5 times the applied voltage or more, as a standard.)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XC9504B093CDR | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DAL | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DAR | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DDL | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DDR | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9504B093CDR | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DAL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DAR | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DDL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B093DDR | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2 ch. Step-Up / Inverting DC/DC Controller ICs |
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