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PDF NJM2344 Data sheet ( Hoja de datos )
| Número de pieza | NJM2344 | |
| Descripción | PWM DC/DC Converter IC | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJM2344 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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NJM2344
PWM DC/DC Converter IC with Standby Function
■GENERAL DESCRIPTION
The NJM2344 is a general purpose PWM DC/DC converter IC
configurable for step-up, step-down and inverting applications.
An internal 1.5A power transistor, a pulse-by pulse current limit
and 1% precision reference make the NJM2344 suitable for a
wide range of voltage converter needs.
The NJM2344 features a standby function that can be used for
both power saving and safety operation.
■PACKAGE OUTLINE
NJM2344D
NJM2344M
■FEATURES
● Operating Voltage
● Wide Oscillator Frequency
•Precision Reference Voltage
● Internal High Power Transistor
● Internal Over Current Limit Circuit
● PWM switching control
● Standby Function
● Bipolar Technology
● Package Outline NJM2344D
NJM2344M
3.0V to 40V
1kHz to 150kHz
Vth=1.25V ± 1%
1.5A max.
9µA typ.
: DIP8
: DMP8
■PIN CONFIGURATION
■BLOCK DIAGRAM
www1.DataSheet4U.com
2
3
4
NJM2344D
NJM2344M
8 PIN FUNCTION CS 1
1. CS
7 2. ES
3. CT
1.5A
6 4. GND
160Ω
5. IN-
5 6. V+
ES 2
7. ON/OFF
8. SI
OSC Block
MAX
ON Duty
9:1
QR
PW M
Logic
S
Ipk Sense
300mV
8 SI
7 ON/OFF
High :ON
Low :OFF (Standby)
CT 3
Vref
1.25V
Error AMP
6 V+
PWM COMP
GND 4
Buffer
5 IN-
Ver.2009-10-13
-1-
1 page  
■ TYPICAL APPLICATIONS
Step-Down Converter (High Current)
RSC
VIN
RBE
RBC
ON/OFF
CONTROL
RON/OFF
CIN
78
12
NJM2344
64
35
CT
F
D1
NJM2344
L1
C1
R2
R1
VOUT
COUT
Step-Up Converter (High Current)
RSC
VIN
L1
ON/OFF
CONTROL
RON/OFF
www.DataSheet4U.com
CIN
RC1
78
12
NJM2344
64
35
CT
RBE
D1
C1
VOUT
COUT
R2
R1
Though the ION/OFF decreases by inserting "RON/OFF " to between ON/OFF terminal and VIN terminal, the minimum operating
voltage is increased due to the resister " RON/OFF ".
D1 use to schottky diode.
Ver.2009-10-13
-5-
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NJM2344.PDF ] | |
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