NJM2392
PWM DC/DC Converter IC
■GENERAL DESCRIPTION
www.datasheet4u.com
■PACKAGE OUTLINE
The NJM2392 is a PWM DC/DC co...
NJM2392
PWM DC/DC Converter IC
■GENERAL DESCRIPTION
www.datasheet4u.com
■PACKAGE OUTLINE
The NJM2392 is a PWM DC/DC converter IC. It features fixed frequency type PWM control for better noise handling and to avoid intermittent oscillation observed in a simplified controller. It is suitable for Step-Up, Step-Down and Inverting applications. In addition, it contains a pulse-by-pulse current limit circuit and can be set by an external resistance.
NJM2392D
NJM2392M
■FEATURES ● Operating Voltage 3.0V to 40V ● Wide Oscillator Frequency 1kHz to 150kHz ● Internal High Power
Transistor 1.5A max. ● Internal Over Current Limit Circuit ● PWM switching control ● Bipolar Technology ● Package Outline NJM2392D : DIP8 NJM2392M : DMP8
■PIN CONFIGURATION
■BLOCK DIAGRAM
1 2 3 4
8 7 6 5
NJM2392D NJM2392M
PIN FUNCTION 1. CS 2. ES 3. CT 4. GND 5. IN6. V+ 7. SI 8. CD
CS
1
Q PWM Logic
R
8
CD
1.5A 160Ω ES 2 OSC Block MAX ON Duty 9:1 CT 3 Error AMP Vref 1.25V
S
7
SI
Ipk Sense 300mV 6 PWM COMP V+
GND
4 Buffer
5
IN-
Ver.2008-08-29
-1-
NJM2392
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Maximum Supply Voltage V+ Comparator Input Voltage VIR www.datasheet4u.com 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
°C °C (note) When supply voltage is less than 40V, the absolute maximum input voltage is equal to the supply ...