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[China]
Address: 311EF, B Buliding, Zhengzhong Time Square, Longgang District, Shenzhen City, China.
Contact name:Angel Sun
Shenzhen Winsun Technology Co., Ltd. |
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WS2801 Programmable Constant Current LED Drive IC
Preliminary WS2801 3-Channel Constant Current LED Driver With
Programmable
PWM Outputs
General Description
The WS2801 is a constant current LED driver. It is designed for
indoor/ outdoor LED displays and decorative LED lighting system. It
is suitable for LED cascading applications. The WS2801ownes 3
output channels, each channel can drive a constant current up to
30mA. WS2081 contains serial shift registers, data latches, output
registers, band gap reference voltage generator, internal
oscillator, and programmable constant output current drivers. The
serial data is read into the shift registers at the rise edge of
the external clock. The data and clock output buffers are designed
for cascading another chip. The output polarity reverse function is
designed for driving high power LED by adapting the application
circuitry. The WS2801 adopts the reliable 2-wire scheme, which
features low EMI transport, very strong anti-interference ability,
and support hot-swap. The 2-wire control scheme can reduce the
system cost; it is very suitable for low cost LED decorative LED
lighting systems. WS2801 is available in both SOP-14 and DIP-14
packages, the operating temperature is -40~85°C
Features
Supports both constant voltage and constant current drive mode
Programmable constant LED drive current
Wide constant output current range 5~150mA
Build in PWM dimming scheme for each output channel,
supports free-run, especially suitable for low cost controller
application
PWM free-run capability(refresh rate(2.5KHz)
Build in buffers to cascading data and clock to the next driver
Output polarity reverse function
Support hot swap
Maximum input clock frequency 25MHz
Power supply voltage 3.3~5.5V
Applications
• LED decorative lighting
• Indoor/Outdoor LED video or massage display
• PWM signal generator
• LCD TV back lighting
Absolute Maximum Ratings
| Parameter | Symbol | Ratings | Unit |
| Power Supply Voltage | VCC | -0.3 to 6V | V |
| Input Voltage | VIN | -0.3 to VCC+0.3V | V |
| Output Voltage | VOUT | -0.4 to 6V | V |
| Output Pin Voltage | VXOUT | -0.3 to 6V | V |
| Output Current Constant Current Drive Mode Constant Voltage Drive Mode | IOUTCC IOUTCV | 0 to 50 0 to 100 | mA |
| Output Current Deviation (Constant Current Driving Mode) Between output channels Between chips | DIOI DIOE | ±1 ±3 | % |
| Input Clock Frequency | FCLK | 25 | MHz |
| Maximum Power Dissipation | PD | 600 | mW |
| Operating Junction Temperature | Topr | -40 to + 150 | °C |
| Storage Temperature Range | Tstg | -55 to + 150 | |
| Lead Temperature (Soldering, 10 seconds) | Tsolder | 300 | |
| ESD susceptibility | 2000 | V |
Note: If the voltage on the pins exceeds the maximum ratings may
cause permanent damage to the device.
Contact Details:
Contact: Angel Sun
Tel: +86-13528847020
Email: Admin@winsunhk.cn
Skype: Angelsun618
Whatsapp: 13528847020
Wechat: 13528847020
QQ: 553695308
