LM337HVK STEEL/NOPB

Voltage Dropout (Max):	--
Base Part Number:	LM337
Supplier Device Package:	TO-3-2
Package / Case:	TO-204AA, TO-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	--
PSRR:	77dB (120Hz)
Current - Output:	1.5A
Series:	--
Voltage - Output (Max):	-47V
Voltage - Output (Min/Fixed):	-1.2V
Voltage - Input (Max):	-50V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Negative
Part Status:	Obsolete
Packaging:	Bulk

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LM337HVK STEEL/NOPB Application Field and Working Principle

Introduction

LM337HVK STEEL/NOPB is an adjustable negative voltage regulator that is widely used in a variety of applications. The device has a current-limiting feature and is designed to provide an output voltage adjustable from −1.25 V to −37 V while guaranteeing a high degree of accuracy and stability. With output current capability up to 1A, the LM337HVK STEEL/NOPB is suitable for a variety of applications including low voltage power supplies, battery chargers, voltage dividers, and low power audio amplifiers.

Application Field

The LM337HVK STEEL/NOPB is an ideal choice for a variety of applications such as voltage regulation, current regulation, voltage conversion, current sensing, and power supply protection. The device can be used in low voltage power supplies and AC/DC converters to regulate the output voltage or as a voltage reference to allow precise adjustment of the output voltage, current, or power. The corresponding voltage and current levels can be set by just two external resistors. The device also features protection against overcurrent and overpower conditions, making it an ideal choice for a variety of applications. In audio systems, the LM337HVK STEEL/NOPB can be used to sense the DC current through an audio output transformer. The resulting voltage can be used to control a dynamic amplifier. In battery charging applications, the LM337HVK STEEL/NOPB can be used to regulate the charging current, which can be set to a lower level during charging in order to extend the life of the battery.

Working Principle

The LM337HVK STEEL/NOPB is an adjustable negative voltage regulator that operates by producing a constant output voltage regardless of the load and input voltage variations. It consists of an error amplifier and a series pass element, connected as shown in Figure 1. The pass element is composed of an NPN transistor (Q1) and two resistors, Rsense and Rset. The error amplifier is a difference amplifier and is used to compare the output voltage with a reference voltage and derive an output accordingly. The output voltage of the LM337HVK STEEL/NOPB is set by an external voltage divider network, with one resistor connected between the adjustment terminal (Adj) and ground, and another resistor connected between the adjustment terminal and the output voltage. By varying the ratio of the resistors, the output voltage can be set to any desired negative voltage between -1.25 V and -37 V.The power dissipated in the LM337HVK STEEL/NOPB is determined by the output voltage and current, and is reduced by reducing the input voltage.

Conclusion

The LM337HVK STEEL/NOPB is a versatile, adjustable negative voltage regulator designed to provide a constant output voltage regardless of the load and input voltage variations. With its current-limiting feature, the LM337HVK STEEL/NOPB is an ideal choice for a variety of applications, including low voltage power supplies, battery chargers, voltage dividers, and low power audio amplifiers.

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