NJW4140
MOSFET Drive Switching Regulator IC for Boost / Fly-back Converter
GENERAL DESCRIPTION
The NJW4140 is a MOSFET...
NJW4140
MOSFET Drive Switching Regulator IC for Boost / Fly-back Converter
GENERAL DESCRIPTION
The NJW4140 is a
MOSFET Drive switching regulator IC for Boost / Fly-back Converter that operates wide input range from 3V to 40V. It can provide large current application because of built-in highly effective Nch
MOSFET drive circuit.
Built-in pulse-by-pulse current detecting type over current protection limits the output current at over load.
It is suitable for boost/fly-back application such as Car Accessory, Office Automation Equipment, Industrial Instrument and so on.
■ PACKAGE OUTLINE NJW4140R NJW4140M
FEATURES Nch
MOSFET Driving Wide Operating
Voltage Range PWM Control Wide Oscillating Frequency Over Current Protection UVLO (Under
Voltage Lockout) Standby Function Package Outline
Driving
Voltage 5.3V (typ.) 3V to 40V 40kHz to 1MHz
NJW4140R : MSOP8(VSP8)* NJW4140M : DMP8
*MEET JEDEC MO-187-DA
Ver.2020-01-31
-1-
NJW4140
PIN CONFIGURATION
1 2 3 4
NJW4140R NJW4140M
8 7 6 5
PIN FUNCTION 1. V+ 2. EN 3. IN4. FB 5. CT 6. GND 7. SI 8. OUT
BLOCK DIAGRAM
V+
EN High: ON Low : OFF
(Standby)
500k
Soft Start
Enable Control
ON/OFF
Low Frequency Control
OSC
Vref 0.8V Error AMP
PWM Comparator
Pulse by Pulse
IN- FB CT
GND
5V Reg.
Driver
OUT
VIPK
SI
-2-
Ver.2020-01-31
NJW4140
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER Supply
Voltage OUT pin
Voltage SI pin
Voltage EN pin
Voltage IN- pin
Voltage CT pin
Voltage
OUT pin Peak Current
SYMBOL V+
VOUT VSI VEN VINVCT
...
