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參數(shù)資料
| 型號： | HV421 |
| 廠商： | Supertex, Inc. |
| 英文描述： | High Voltage 1 REN Ring Generator |
| 中文描述： | 高壓發(fā)電機1任環(huán) |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 56K |
| 代理商： | HV421 |
11-4
Breakdown
Voltage, BV
DSS
100V
Gate Threshold
Voltage, V
GS(th)
0.8V to 2.4V
Device
Type
On-Resistance, R
DS(ON)
6.0
at V
GS
=5V
11
at V
GS
=-5V
Package Options
VN2110
N-Channel
TO-92, SOT-23
VP2110
P-Channel
-100V
-1.5V to -3.5V
TO-92, SOT-23
Application Description
The Supertex HV421LG is a high voltage 1 REN ring genera-
tor. A typical application circuit is shown in Figure 1. There are
four basic parts to the circuit; the DC-DC converter, level
translation of the ringing frequency, enable/disable function,
and an external source follower buffer stage.
Enable/Disable function
The HV421 can be enabled by connecting the 1.3M
and
30M
resistors to the same potential as V
DD
and disabled by
connecting them to ground.
DC-DC converter
– OBSOLETE –
The DC-DC converter consists of a 330
μ
H inductor, 1N4148
diode, 1.0
μ
F capacitor and 1.3M
resistor. The 1.3M
resistor
sets the DC-DC converter frequency. Energy is stored in the
330
μ
H inductor when the switching transistor is turned on and
is released into the 1.0
μ
F capacitor when the switch is in the
off state. A high voltage DC will develop at V
PP
which is
internally connected to the level translator.
Level translation of the
ringing frequency
The ringing frequency is set by a 30M
resistor. A low voltage
square wave is generated with a nominal frequency of 25Hz.
Lower ringing frequencies can be obtained by using resistors
greater than 30M
.
The signal is then level translated to swing
from 0V to the V
PP
voltage. An inverted and a noninverted
output are generated (gate and gate bar).
External source follower
buffer stage
The gate and gate bar are connected to an external source
follower stage. Supertex transistors VP2110K1 and VN2110K1
are used for the buffering. Zener diodes clamps across the
gates are recommended as a precaution but not required.
The voltage seen by the load is
±
60V. A 6.8K
resistor in
series with an 8.0
μ
F capacitor is used to simulate 1 North
American REN (ringer equivalent number). The main specifi-
cations for the Supertex source follower transistors are listed
below.
HV421
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PDF描述 |
|---|---|
| HV421 | High Voltage 1 REN Ring Generator(高壓1REN振鈴發(fā)生器) |
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| HV430 | High Voltage Ring Generator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HV421LG | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:High Voltage 1 REN Ring Generator |
| HV4222X | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
| HV430 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:High Voltage Ring Generator |
| HV430DB1 | 功能描述:電源管理IC開發(fā)工具 HV430 Demo Brd RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| HV430DB3 | 功能描述:電源管理IC開發(fā)工具 HV430 Demo Brd RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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