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PDF NJW4840 Data sheet ( Hoja de datos )
| Número de pieza | NJW4840 | |
| Descripción | High Speed Switching Gate Driver | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJW4840 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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NJW4840
High Speed Switching Gate Driver
GENERAL DESCRIPTION
The NJW4840 is a High Speed Switching Gate Driver that is
applicable 4A peak current.
The NJW4840 features are Withstand voltage of 24V, Operating
voltage range: 8V to 20V and Fast switching time (27.5ns typical at
4700pF load).
The NJW4840 is suitable for PDP Sustain Pulse Drive, DC / AC
Motor Drive, Switching Power Supply, and DC / DC Converter
Applications.
FEATURES
Output Peak Current:
±4A (peak)
Operating Voltage Range:
8V to 20V
High Speed Switching:
27.5nsec(typ.)@CL=4,700pF
Built-in Thermal Shut Down
Under Voltage Lockout
Short Circuit Protection (power / ground fault)
Package:
MSOP8 (VSP8)
* MEET JEDEC MO-187-DA
PACKAGE OUTLINE
NJW4840R
(MSOP8 (VSP8))
PIN CONNECTION
http://www.DataSheet4U.net/
1
8 1. GND
5. GND
2
7 2. GND
6. GND
3. GND
7. OUT
3
6 4. IN
8. VDD
45
BLOCK DIAGRAM
VDD
Control
Logic
IN
UVLO
TSD
OUT
Ver.2012-08-22
GND
-1-
datasheet pdf - http://www.DataSheet4U.net/
1 page  
NJW4840
APPLICATION TIPS
In the application that does a high-speed switching of NJW4840, because the current flow corresponds to the input
frequency, the substrate (PCB) layout becomes an important.
NJW4840 is driving the High-side/Low-side SW gate with high speed to reduce switching losses. The transient voltage
is generated by parasitic inductance and a high-speed current change of high side and low side SW.
You should attempt the transition voltage decrease by making a current loop area minimize as much as possible.
Therefore, you should make a current flowing line thick and short as much as possible.
You should insert a bypass capacitor between the VDD pin and the GND pin to prevent malfunction by generating over
voltage and/or exceed maximum input voltage rating. The recommended bypass capacitor is low ESR and high
frequency characteristic (NJRC recommends 0.1µF or more).
An aluminum electrolysis capacitor is recommended for smoothing condenser. (NJRC recommends 10µF or more).
However, you should use large capacitor by sufficient evaluation (assessment) due to load condition and/or application
use environment. (There is a possibility that the supply voltage rises by inductive kickback when the supply current of the
inductive load is large.)
The bypass capacitors should be connected as much as possible near the VDD pin.
http://www.DataSheet4U.net/
Ver.2012-08-22
-5-
datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet NJW4840.PDF ] | |
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