參數(shù)資料
型號： S-875039B
廠商： Seiko Instruments Inc.
英文描述： High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.0V,VD檢測3.9V,帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
中文描述： 高耐壓，隨著復(fù)位功能，它集成了高精度電壓檢測電路和電壓調(diào)整在單一芯片上。（村輸出5.0V，性病檢測均為3.9V，帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)穩(wěn)壓器集成了高精度的電壓檢測器和穩(wěn)壓器性病村））
文件頁數(shù)： 16/34頁
文件大小： 239K
代理商： S-875039B
HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-87X Series
Seiko Instruments Inc.
15
4.
Delay Circuit
The delay circuit outputs voltage detector output (V
OR
) with delay after the voltage at V
IN
pin has become release voltage
(+V
DET
) at the rising of V
IN
pin.
In Fig. 9, when Vcd exceeds the reference voltage (Vref), the output
voltage pin V
OR
changes from low to high level, providing delay
output. When the voltage at V
IN
pin falls under the detection voltage (
-V
DET
), the N
2
transistor turns ON, therefore the charge of C
D
is
rapidly discharged and the voltage detector output (V
OR
) changes
from high to low level without delay.
The external capacitor (C
D
) is charged with constant current, and is
practically independent of V
IN
voltage. Its delay time (t
pd
) is
expressed by the following equation:
t
pd
(ms)=Delay coefficient (3.18 min., 5.74 typ., 8.73 max.)×C
D
(nF)
Note
Unless an output delay is needed, keep C
D
pin open.
Do not apply external voltage other than ground potential to
C
D
pins, which may cause IC breakdown.
When designing your printed-circuit board layout, take care
that no leakage current flows to the external capacitor (C
D
),
otherwise the correct delay time may not be obtained.
Because the value of the constant current source I
C
is only
195 nA, C
D
to impedance is high.
5.
Voltage Detection Circuit
The built-in voltage detection circuit (Nch opendrain type) is equivalent to our S-808/809 Series voltage detectors. A pull-up
resistor of about 100 k
is required for output. Since the comparator power of this circuit is supplied from V
IN
pin, this circuit
operates while voltage is applied to V
IN
pin.
The detection voltage of the voltage detector can be selected as follows :
2.1 V to 11.3 V
±2.4%
(0.1V step)
In the S-87XXXXF Series, the release voltage (+V
DET
) accuracy is±1.1%. So, it responds to the application for overcharge
detection of lithium-ion battery packs.
In the S-87XXXXE Series, the input voltage monitoring pin of the voltage detector is externally connected as the SENSE pin.
Because this pin is configured by a resistor only, temporary current such as a through-type current does not flow.
Consequently, even when resistor R
IN
is inserted between input power supply and V
IN
pin, the input power voltage can be
accurately monitored by connecting the SENSE pin to the input power supply. Also, when a drop in the SENSE pin input
voltage is detected, the voltage detector generates a reset signal. At the same time, it powers off the voltage regulator.
Notes:
As shown in Figure 11, when connecting V
OR
output to V
PF
pin in the S-87XXXXC Series or connecting SENSE
pin to V
IN
pin in the S-87XXXXE Series, the following phenomena occur if R
IN
is connected between input
voltage and V
IN
pin. Be careful.
At the time of voltage detection, the voltage regulator is shutdown and load current is cut. Therefore, V
IN
voltage increases by
V
IN
= I
IN
×R
IN
, where the current flowing into R
IN
is set to I
IN
. Hence, if
V
IN
exceeds
hysterisis width Vhys, oscillation starts immediately after detection and continues. It is necessary to set
V
IN
less than Vhys.
At the time of voltage release, the voltage regulator is powered on and load current flows. Therefore, if
V
IN
exceeds hysterisis width Vhys, oscillation starts immediately after release and continues. It is
necessary to set
V
IN
less than Vhys. Also at the time of voltage release, the rush current to charge output
Vcd
C
D
N
2
Vref
+
-
V
OR
I
C
Figure 9 Delay
相關(guān)PDF資料
PDF描述
S-875039C High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.0V,VD檢測3.9V,帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
S-875041A High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.0V,VD檢測4.1V,帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
S-875041B High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.0V,VD檢測4.1V,帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
S-875041C High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.0V,VD檢測4.1V,帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
S-875061C High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.0V,VD檢測6.1V,帶復(fù)位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-875039BUP-ABA-T2 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-875039BUP-ABB-T2 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-875039BUP-ABC-T2 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-875039BUP-ABD-T2 功能描述:電壓監(jiān)測器/監(jiān)控器 5.0V with 3.9V Detec RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT
S-875039BUP-ABDT2G 功能描述:電壓監(jiān)測器/監(jiān)控器 5.0V with 3.9V Detec RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT
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