NJM2392 Datasheet, PDF (1/9 Pages) New Japan Radio – PWM DC/DC Converter IC

NJM2392
PWM DC/DC Converter IC
■GENERAL DESCRIPTION
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.
■PACKAGE OUTLINE
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
8 ^{PIN FUNCTION} _{CS 1}
1. C_S
2
7 2. E_S
3. C_T
1.5A
3
6 _{4. GND}
5. IN-
160Ω
4
5 _{6. V}⁺
E_S 2
NJM2392D
NJM2392M
7. S_I
8. C_D
OSC Block
MAX
ON Duty
9:1
Q
R
PW M
Logic
S
Ipk Sense
300mV
8 C_D
7 S_I
C_T 3
Vref
1.25V
Error AMP
6 V⁺
PWM COMP
GND 4
Buffer
5 IN-
Ver.2008-08-29
-1-