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NJM2344

JRC
Part Number NJM2344
Manufacturer JRC
Description PWM DC/DC Converter IC
Published Feb 11, 2010
Detailed Description NJM2344 PWM DC/DC Converter IC with Standby Function ■GENERAL DESCRIPTION The NJM2344 is a general purpose PWM DC/DC con...
Datasheet PDF File NJM2344 PDF File

NJM2344
NJM2344

Overview
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 3.
0V to 40V ● Wide Oscillator Frequency 1kHz to 150kHz •Precision Reference Voltage Vth=1.
25V ± 1% ● Internal High Power Transistor 1.
5A max.
● Internal Over Current Limit Circuit ● PWM switching control ● Standby Function 9µA typ.
● Bipolar Technology ● Package Outline NJM2344D : DIP8 NJM2344M : DMP8 ■PIN CONFIGURATION 1 www.
DataSheet4U.
com 2 3 4 8 7 6 5 ■BLOCK DIAGRAM PIN FUNCTION 1.
CS 2.
ES 3.
CT 4.
GND 5.
IN6.
V+ 7.
ON/OFF 8.
SI CS 1 Q R PWM Logic 1.
5A 160Ω S 8 SI ES 2 7 ON/OFF High :ON Low :OFF (Standby) NJM2344D NJM2344M OSC Block MAX ON Duty 9:1 CT 3 Error AMP Vref 1.
25V Ipk Sense 300mV 6 PWM COMP V+ GND 4 Buffer 5 IN- Ver.
2009-10-13 -1- NJM2344 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Maximum Supply Voltage V+ Comparator Input Voltage VIR ON/OFF Terminal Voltage VON/OFF Output Driver Voltage VC(driver) Output Switch Voltage VSW Output Driver Current IC(driver) Output Switch Current ISW Power Dissipation Operating Temperature Range Storage Temperature Range PD Topr Tstg MAXIMUM RATINGS 40 -0.
3 ~ 40 (note) -0.
3 ~ 40 (note) 40 40 100 1.
5 DIP8 875 DMP8 580 (*1) 750 (*2) -40 ~ +85 -50 ~ +150 UNIT V V V V mA A mW °C °C (note) When supply voltage is less than 40V, the absolute maximum input voltage is equal to the supply voltage.
(*1) At on PC board : 114.
3mm × 76.
2mm × 1.
6mm(2 layer FR-4) : Conform to EIA/JEDEC (*2) At on PC board : 114.
3mm × 76.
2mm × 1.
6mm(4 layer FR-4) : Conform to EIA/JEDEC ■POWER DISSIPATION...


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