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NJM2811

JRC
Part Number NJM2811
Manufacturer JRC
Description 7.5A High Power DC/DC Converter Controller IC
Published Jun 27, 2016
Detailed Description NJM2811 7.5A High Power DC/DC Converter Controller IC ■GENERAL DESCRIPTION The NJM2811 is a high power step down DC/DC...
Datasheet PDF File NJM2811 PDF File

NJM2811
NJM2811

Overview
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- NJM2811 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER Maximum Supply Voltage Switch Output Voltage Voltage Feedback and Compensation Input Voltage Range SYMBOL V+ Vo (SWITCH) VFB,VCOMP Power Dissipation PD Operating Junction Temperature Operating Temperature Range Storage Temperature Range Tj Topr Tstg MAXIMUM RATINGS 40 -0.
5 ∼ +Vin -0.
3 ∼ +7.
0 TO-220 (5PIN) 16(TC ≤ 46°C) -40 ∼ +150 -40 ~ +85 -50 ~ +150 UNIT V V V W °C °C °C ■THERMAL CHARACTERISTICS Thermal Resistance Junction-to-Ambient Temperature Junction-to-Case θja θjc ■POWER DISSIPATION vs.
AMBIENT TEMPERATURE 70 6.
5 °C/W Power Dissipation PD (W) (Topr=-40~+85°C, Tj= ~+150°C, PD=16W(TC ≤ 46°C)) 18 16 ∞ Heat Sink 14 12 θHS=5°C/W 10 8 θHS=10°C/W 6 θHS=20°C/W 4 2 Without Heat Sink 0 25 50 75 Ambient Temperature Ta...


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