The SP433 is high-voltage four-terminal adjustable voltage references, with over current protection feature. The SP433 is a one chip solution to a 2.5V precision voltage reference and constant current output in the application of secondary feedback control of power supply, DC/DC converter, adaptor and charger. SP433 is idea for low cost switching power supply application.

*Voltage Reference Accuracy of 0.5% & 1.0%
*Sink Current Capability from 1mA to 100mA
*Adjustable Output Voltage from VREF to 18V
*Low Output Noise
*Typical Output Dynamic Impedance Less Than 200mΩ
*Available in SOT-23-5L and TO-94 package
*Over Current Protection

*Battery Charger
*Battery Power Equipment
*Linear Regulators
*Switch Power Supply
*Cellular Phone
*Digital Cameras
*Computer Disk Drivers


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The CAT4016 is a 16 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4V (for 2 to 100mA LED current) allows for more power efficient designs.
A high-speed 4-wire serial interface of up to 25MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface. The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface.
Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit.
The device is available in the 24-lead SOIC, TSSOP, QSOP and the compact TQFN 4 x 4mm packages.

*16 Constant current-sink channels
*Serial interface up to 25MHz clock frequency
*3V to 5.5V logic supply
*LED current range from 2mA to 100mA
*LED current set by external RSET resistor
*300mV LED dropout at 30mA
*Thermal shutdown protection
*Available in RoHS-compliant 24-lead SOIC, TSSOP, QSOP, and 4 x 4mm TQFN packages

*Billboard Display
*Marquee Display
*Instrument Display
*General Purpose Display

CAT4016W-T1, CAT4016Y-T2, CAT4016VS-T2, CAT4016VSR-T2

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General Description
The LM3402/02HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled on-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.

*Integrated 0.5A N-channel MOSFET
*VIN Range from 6V to 42V (LM3402)
*VIN Range from 6V to 75V (LM3402HV)
*500 mA Output Current Over Temperature
*Cycle-by-Cycle Current Limit
*No Control Loop Compensation Required
*Separate PWM Dimming and Low Power Shutdown
*Supports all-ceramic output capacitors and capacitor-less outputs
*Thermal shutdown protection
*MSOP-8, PSOP-8 Packages

*LED Driver
*Constant Current Source
*Automotive Lighting
*General Illumination
*Industrial Lighting

LM3402MM, LM3402MMX, LM3402HVMM, LM3402HVMMX, LM3402MR, LM3402MRX, LM3402HVMR, LM3402HVMRX

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General Description
 The DM163 is a LED driver that comprises shift registers, data latches, 8x3-channel constant current circuitry with current value set by 3 external resistors, and 64 x 256 gray level PWM (Pulse Width Modulation) function unit.
Each channel provides a maximum current of 60 mA.
The grayscale data are separated into BANK0 and BANK1 respectively, selected by SELBK pin. BANK0 is 6-bits grayscale data and the BNAK1 is 8-bits grayscale data.
Depending on the system requirement, both PWM banks could be utilized jointly to achieve maximum 8+6 bit grayscale performance.
Alternatively, users can choose either 64-graylevel bank or 256-graylevel bank for dot correction, and the remaining bank as image data.
DM163 could also be constructed as a PWM controller for LED drivers.
When VDDH is connected to VDD, each of the 24 output channels outputs can act as an inverse digital signal for controlling the LED driver.

* 24 Output Channels
* 8 + 6-bits PWM grayscale Control
* Constant Current Output: 5mA to 60mA
* LED Power Supply Voltage up to 17V
* VDD=3V to 5.5V
* Varied Output Current Level Set By 3 External Resistors
* Serial Shift-In Architecture for Grayscale Data

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Product Description
MBI5025 is designed for LED displays.
As an enhancement of its predecessor, MBI5016, MBI5025 exploits PrecisionDrive™ technology to enhance its output characteristics.
MBI5025 contains a serial buffer and data latches which convert serial input data into parallel output format.
At MBI5025 output stage, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs within a large range of Vf variations.
MBI5025 provides users with great flexibility and device performance while using MBI5025 in
their system design for LED display applications, e.g. LED panels.
Users may adjust the output current from 3 mA to 35 mA through an external resistor, Rext, which gives users flexibility in controlling the light intensity of LEDs.
MBI5025 guarantees to endure maximum 17V at the output port.
The high clock frequency, 25 MHz, also satisfies the system requirements of high volume data transmission.

* 16 constant-current output channels
* Constant output current invariant to load voltage change :
Constant output current range: 3-50 mA
* Excellent output current accuracy :
between channels: ±3% (max.), and between ICs: ±6% (max.)
* Output current adjusted through an external resistor
* Fast response of output current, OE (min.): 400 ns
* 25MHz clock frequency
* Schmitt trigger input
* 3.3V / 5V supply voltage


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