Controller

OB3350CP PDF Datasheet – Cost Effective LED Controller

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Part Number: OB3350CP, OB3350CPA

Function: Cost Effective LED Controller

Package: SOP 8 Pin

Manufacturer: On-Bright Electronics

Images:

OB3350CP LED Controller

Description

The OB3350CP is a highly integrated and cost effective Light Emitting Diode (LED) driver optimized for LCD monitor and LCD TV backlighting application. It provides a high performance LED backlight solution with minimized BOM count.

The OB3350 contains a PWM boost driver which uses current mode control and fixed frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 300mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED.

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Pinout

OB3350CP datasheet pinout

Features

1. Current Mode PWM Controller With Good Dynamic Response

2. 8V to 35V Input Voltage Range

3. External PWM Dimming Mode

4. Over Voltage Protection

5. Over Current Protection

6. Under Voltage Lockout (UVLO)

7. Thermal Shutdown

Applications:

1. LCD Monitor

2. LCD TV

3. Flat panel display

 

Other data sheets are available within the file: 0B3350CP, 0B3350CPA

OB3350CP Datasheet PDF

WS2812B Datasheet PDF – RGB LED with 24bit Controller

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This is one of the LED chip types.

Part Number: WS2812B

Function: Intelligent control LED integrated light source

Package: SMD 4 Pin

Manufacturer: Worldsemi ( http://www.world-semi.com/ )

See the preview image and the PDF file for more information.

Image

ws2812b-rgb-led

Description

The WS2812B is a intelligent control LED light source that the control circuit and RGB chip are integrated in a package of 5050 components. It internal include intelligent digital port data latch and signal reshaping amplification drive circuit.

Also include a precision internal oscillator and a 12V voltage programmable constant curre-nt control part, effectively ensuring the pixel point light color height consistent.

The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch, the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade pixel through the DO port.

After transmission for each pixel， the signal to reduce 24bit. pixel adopt auto resha-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend on the speed of signal transmission.

 

WS2812B Pinouts :

WS2812B datasheet

 

Features and Benefits

1. Intelligent reverse connect protection, the power supply reverse connection does not damage the IC.

2. The control circuit and the LED share the only power source.

3. Control circuit and RGB chip are integrated in a package of 5050 components, form a complete control of pixel point.

4. Built-in signal reshaping circuit, after wave reshaping to the next driver, ensure wave-form distortion not accumulate.

5. Built-in electric reset circuit and power lost reset circuit.

 

WS2812B Datasheet

WS2812B pdf


 

Other data sheets are available within the file: WS2812B

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