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What is NJM2811?

This electronic component, produced by the manufacturer "JRC", performs the same function as "7.5A High Power DC/DC Converter Controller IC".


NJM2811 Datasheet PDF - JRC

Part Number NJM2811
Description 7.5A High Power DC/DC Converter Controller IC
Manufacturers JRC 
Logo JRC Logo 


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NJM2811
7.5A High Power DC/DC Converter Controller IC
GENERAL DESCRIPTION
The NJM2811 is a high power step down DC/DC converter IC.
It incorporates 7.5A power transistor, ±2% accuracy precision
voltage reference, fixed frequency PWM controller with
cycle-by-cycle current limit and low power consumption stand by
function.
The NJM2811 realizes a high power step down application with
minimal external components.
PACKAGE OUTLINE
PIN FUNCTION
1:VFB
2:SWOUT
3:GND
4:V+
5:STBY (VCOMP)
FEATURES
Adjustable output voltage
more than 5V
Operating Voltage
7.5V to 40V
PWM form Switching Power Supply Control
Internal High Power Transistor 7.5A (min.)
Fixed Frequency Oscillator
72kHz (typ.)
Current Sense Amplifier
Under Voltage Lockout
Thermal Shutdown Circuit
Bipolar Technology
Package Outline
TO-220(5PIN)
NJM2811TLA2050
Pin 1 locates on the left side of the package drawing
(top front view).
BLOCK DIAGRAM
7.5A Power Transistor
4
Current Sense
Amplifier
Current Detection
Transistor
Thermal
Shutdown
Reference
Voltage
Oscillator
SQ
ON/OFF VREF
Under Voltage
Lockout
Standby Circuit
PWM Comparator
R
Latch Circuit
Error Amplifier
VREF
53
2
1
-1-

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NJM2811 equivalent
NJM2811
TYPICAL CHARACTERISTICS
Voltage Feedback Input Threshold vs. Temperature
(V+=12V)
5.1
Error AMP Block Input Bias Current vs. Temperature
(V+=12V, V =V (th)+0.15V)
0.4 FB FB
5.05 0.3
5 0.2
4.95 0.1
4.9
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (oC)
Oscillator Frequency vs. Temperature
80 (V+=12V)
75
70
65
60
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (oC)
Under Voltage Lockout Threshold
8 vs. Temperature
7.5
Startup Threshold
7 V+ Increasing
6.5
6 Startup Threshold
V+ Decreasing
5.5
5
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (oC)
0
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (oC)
Current Limit Threshold vs. Temperature
10 (V+=15V)
9
8
7
6
5
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (oC)
Operating-State Power Supply Current
vs. Tmperature
60 (V+=40V, VFB=0V, duty cycle=MAX)
50
40
30
20
10
0
-50 -25 0 25 50 75 100 125 150
Ambient Tmperature Ta (oC)
-5-


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NJM2811 electronic component.


Information Total 7 Pages
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Download [ NJM2811.PDF Datasheet ]

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