Part Number: MT7201

Function: 1A, LED Driver with Internal Switch

Package: SOT89-5 Type

Manufacturer: Maxic Technology

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Description

The MT7201 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 7~40V and provides an externally adjustable output current of up to 1A. Depending upon supply voltage and external components, this can provide up to 32 watts of output power. The MT7201 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Output current can be adjusted above, or below the set value, by applying an external control signal to the ‘ADJ’ pin. The ADJ pin will accept either a DC voltage or a PWM waveform. Depending upon the control frequency, this will provide either a continuous or a gated output current.

Features

1. Pass 4KV ESD test

2. Simple low parts count

3. 1A output current

4. Single pin on/off and brightness control using DC voltage or PWM

5. Internal PWM filter

6. Soft-start

7. High efficiency (up to 97%)

8. Wide input voltage range: 7V to 40V

9. Output shutdown

Applications:

1. Low voltage halogen replacement LEDs

2. Automotive lighting

3. Low voltage industrial lighting

4. LED back-up lighting

5. Illuminated signs

MT7201 PDF Datasheet

Part Number: LIS8516

Function: Two windings – Primary-side control LED Driver Switch

Package: DIP 8 Pin Type

Manufacturer: LIS

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Description

LIS8516 is a control chip dedicated to LED constant current drive. By adopting the proprietary primary side LED constant current control technology, the system architecture has been simplified to the greatest extent.

It not only saves the feedback devices such as optocoupler and 431 required for traditional secondary side control, but also further saves the auxiliary winding, feedback resistor and rectifier diode for IC power supply in traditional primary side control architecture. Passive components, so that the system cost has been greatly reduced.

Features

1. Novel digital current loop control technology

2. Integrated transformer inductance compensation function

3. Integrated Leading Edge Blanking (LEB)

4. Integrated frequency dithering function

5. Ultra-low operating current (110uA)

6. Ultra-wide output voltage range

7. Chip undervoltage and overvoltage protection functions

8. Cycle-by-cycle primary-side peak current protection

Block Diagram and Pinouts:

A control LED driver switch is a device or component used to control and manage the operation of LEDs (Light Emitting Diodes) in various lighting applications. LED drivers are essential because they ensure that LEDs receive the correct voltage and current for optimal performance and longevity.

Applications:

1. LED spotlight driver

2. LED Cabinet Light Driver

3. LED track light driver

4. LED ceiling light driver

5. LED landscape light driver

LIS8516 PDF Datasheet