CXLE87189 is a driver chip designed specifically for RGB LEDs, integrating MCU single wire digital interface, data latch, constant current drive, and PWM brightness control circuit. Its biggest feature is supporting dual channel level communication, with DIN and FDIN dual input ports and DO1/DO2 dual output ports, and introducing DENL enable pins, greatly improving the flexibility and reliability of system wiring. Even if a chip is damaged, it does not affect subsequent device communication.
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[ CXLE87189 ]"
CXLE87189: Deep Analysis of High Performance Single Line Three Channel LED Driver Chip
In LED full-color display and decorative lighting systems, efficient, stable, and flexible driver chips are the core for achieving precise color control and system reliability. Launched by JTM-ICCXLE87189It is a highly integrated productSingle line three channel LED constant current driver chip, usingIntegrated wick packaging, possessingDual channel input/outputThe65536 level PWM brightness controlandGamma correctionWith advanced features, it is widely applicable to application scenarios such as point light sources, guardrail tubes, soft light strips, and indoor and outdoor large screens. This article will delve into its technical architecture, communication mechanism, typical applications, and key points of system design.
1、 Chip Overview and Core Highlights
CXLE87189 is a driver chip designed specifically for RGB LED, integrated withMCU single line digital interfaceThedata latchTheconstant current driveandPWM brightness controlIntegrated circuit. Its biggest feature is supportDual channel level communication, possessingDIN and FDIN dual input portsandDO1/DO2 dual output outletAnd introduceDENL enable pinThis greatly enhances the flexibility and reliability of system wiring, and even if a chip is damaged, it does not affect subsequent device communication.
The chip adoptsIntegrated wick packagingThe working voltage range is4.0V~5.5VThe output current of each channel can be2mA~25mAWithin the scope128 levelsAdjustment, PWM brightness level up to65536 level, and built-inGamma 2.4 correctionThe color transition is natural and the display effect is excellent.
2、 Main technical features
• High precision constant current outputChannel error≤± 3%, inter chip error; 5%.
• Dual channel communication mechanismSupports DIN/FDIN automatic switching or manual specification, with data shaping and forwarding function, and the signal does not attenuate with cascading.
• Flexible cascading controlSupport DENL pins to implement matrix based time-sharing control, significantly reducing the number of wiring.
• Wide range data rateSupports communication frequencies ranging from 400kHz to 1.2MHz to meet different refresh rate requirements.
• Complete protection mechanismBuilt in power on reset, ESD protection and other functions to enhance system reliability.
3、 Typical Applications and System Design
3.1. Single line cascading application
CXLE87189 can be accessed through DIN→ DO1 or FDIN→ DO2 implements traditional single line cascading and is suitable for linear layout scenes such as light strips and point light sources. Each chip absorbs its own display data and forwards subsequent data, and the system can achieve overall control without complex wiring.
To prevent the instantaneous high voltage generated by live plugging and unplugging of the product during testing from causing damage to the input and output pins of the chip signal, it should be addressed in the signal input and
Output pin connected in series with 100Ω Protect the resistor. In addition, the 104 decoupling capacitors of each chip in the figure are indispensable, and they are wired to the VDD and GND of the chip
Feet should be as short as possible to achieve the best decoupling effect and stabilize chip operation.
3.2. Matrix control (DENL time-sharing mode)
The DENL of the first chip of each light strip is controlled by the MCU, and the DENL of the subsequent chip is connected to GND. The wiring of each light strip is shown in Figure 7,
The circuit diagram for the application of multiple light strips is as follows:
Detailed explanation of circuit diagram:
For example, if x=5, n=10, and k=15, it means there are 5 sets of light strips, each with 10 strips and 15 chips per strip.
In large screen or multi light strip systems, DENL pins can be used to achieve“ Grouping Root” Control structure:
• The first chip DENL of each group of light strips is controlled by MCU, and subsequent chips DENL are grounded.
• The MCU sequentially lowers the DENLs of each group and synchronously sends corresponding data to achieve time-sharing writing.
• After all data is written, send a unified RESET signal to update the output.
This method can effectively reduce the number of control lines, lower the complexity and cost of the project.
3.3. The control process is as follows:
3.3.1DEN1L pull down, delay t1, the DIN1~DINn data lines of the controller respectively control the 1st~nth light strip of DENL1
Write data. Data writing completed, delay t2.
3.3.2DENL2 is pulled down, with a delay of t1. The DIN1~DINn data lines of the controller respectively control the 1st~nth light strip controlled by DENL2
Write data. Data writing completed, delay t2.
3.3.3DENL3 is pulled down, with a delay of t1. The DIN1~DINn data lines of the controller control the 1st~nth light strips of DENL3, respectively
… …
Pull up and wait for t4 before entering the next cycle,
After writing data to all light strips by sequentially lowering DENL, send a reset code to update the data output with a delay of t3
Attention: After each DENL is lowered and enabled, DIN1~DINn must send data. Even if a certain LED strip does not require updating data
The same data as the currently held data must be sent.
3.4. Write the data sequence diagram as follows:
Detailed explanation of timing diagram:
Data format: The label on the right side of data D represents the number of chips in the light strip;
For example, D1_1, D1_2, D1_3~D1_k represent the data of the 1st, 2nd, 3rd~k chips of the 1st LED strip.
D2_1, D2_2, D2_3~D2_k represent the data of the 1st, 2nd, 3rd~k chips of the 2nd LED strip.
Dn_1, Dn_2, Dn_3~Dn_k represent the data of the 1st, 2nd, 3rd~k chips of the nth LED strip.
Dxn2, Dxn2, Dxn3~Dxn2~k show the data of the 1st, 2nd, 3rd~k chips of the nxth light strip. If x=10 and n=10, then it means
The 100th light strip.
Note:
t1> 4us，t2> 0us，t1+t2< 20us，t3> 0us,t4> 4us。
3.5 Input-output equivalent circuit
4、 Data format and communication protocol
4.1. Working mode setting
Before receiving display data, the chip needs to configure the correct working mode and select the method of receiving display data. The mode setting command has a total of 48 bits,
The first 24 bits are the command code, and the last 24 bits are the verification inverse code. The chip reset starts accepting data, and there are four types of mode setting commands as follows,
The chip supports four working modes, which can be set through a 48 bit command code:
• 0xFFFFFF_000000Automatic Switching Mode (DIN&arr; FDIN)
The chip is configured to operate in normal mode. In this mode, the default DIN receives display data for the first time, and the chip detects that there is a signal on the port
If the number is input, the port will continue to receive data. If no data is received for more than 160ms, it will switch to FDIN to receive data, and the chip will detect it
If there is a signal input to the port, keep it receiving. If no data is received for more than 160ms, switch to DIN receiving again
Display data. DIN and FDIN switch in a cyclic manner to receive display data.
• 0xFFFFFA_000005DIN lock mode
The chip is configured to work in DIN mode, in which the chip only receives display data input from the DIN end, and the FDIN end data is invalid.
• 0xFFFFF5_00000AFDIN lock mode
The chip is configured to operate in FDIN mode. In this mode, the chip only receives display data input from the FDIN end, and the DIN end data is invalid.
• 0xFFFFF0_00000FTest mode
Chip configured for testing mode
4.2. Constant current value and PWM setting
• C3 commandSet reference currents for R, G, and B channels (128 levels)
• Dn commandSet the PWM duty cycle of R, G, and B channels (256 levels)
When applying CXLE87189 to LED product design, the current difference between channels and even chips is extremely small. When the load terminal voltage changes
At this time, the stability of its output current is not affected, and the constant current curve is shown in the following figure:
4.3. Data refresh rate calculation
Taking 1.2MHz communication rate as an example:
• 24 bit transmission time per pixel; 20μs
• 1000 pixel system refresh time& amp; 20ms → Refresh rate& 50Hz
The data refresh time is calculated based on how many pixels are cascaded in a system, with a set of RGB typically consisting of one pixel (or segment),
A CXLE87189 chip can control a set of RGB.
Calculate according to normal mode:
The 1-bit data period is 830ns (frequency 1.2MHz), and one pixel data includes 24 bits of R (8-bit), G (8-bit), and B (8-bit),
The transmission time is 830ns× 24≈ 20μs。 If there are a total of 1000 pixels in a system, the time to refresh all displays at once is 20 seconds
× 1000=20ms (ignoring C1, C2, and Reset signal times), which means a one second refresh rate of 1÷ 20ms=50Hz。
The following is a table of the highest data refresh rate corresponding to cascading points:
4.4. display data
After the chip is powered on and reset, and receives the mode setting command, it begins to receive the constant current value setting command, and then receives the display data. After receiving the 24 bit
Afterwards, the DO1 and DO2 ports start forwarding data that continues to be sent from the DIN or FDIN end, providing display data for the next cascaded chip. Forwarding data
Previously, the DO1 and DO2 ports were always at a low level. If the DIN or FDIN terminal inputs a Reset signal, the OUT port of the chip will respond based on the received signal
The 24 bit display data output corresponds to the duty cycle of the PWM waveform, and the chip waits again to receive new data. After receiving the 24 bit number
Afterwards, the data is forwarded through the DO port, and the chip maintains the original outputs of R, G, and B unchanged until it receives the Reset signal.
The chip adopts automatic shaping and forwarding technology, and the signal will not be distorted or attenuated. For all cascaded chips, the data transmission cycle is
coincident.
4.5. A complete frame of data structure
C1 and C2 are mode setting commands, each containing 24 bits of data. Each chip will receive and forward C1 and C2
0xFFFFF000000 is the normal working mode command, 0xFFFFA_000005 is the DIN working mode command, and 0xFFFF5_00000A is
FDIN working mode command, 0XFFFFF0_00000F is the chip test mode command, C3 is the constant current value setting command, and each chip will receive it
And forward C1, C2, C3.
D1、D2、D3、D4、… … 、 Dn is the PWM setting command for each chip.
Reset indicates a reset signal, low level is valid.
4.6. Data format of C3
The C3 command contains 8× 3-bit data bit, high bit first, R7, G7, B7 are fixed to 0.
R [6:0]: Used to set the constant current value of R output. Full 0 code is 2mA, full 1 code is 25mA, adjustable at 128 levels.
G [6:0]: Used to set the constant current value of G output. Full 0 code is 2mA, full 1 code is 25mA, adjustable at 128 levels.
B [6:0]: Used to set the constant current value of B output. Full 0 code is 2mA, full 1 code is 25mA, adjustable at 128 levels.
4.7 Data reception and forwarding
Among them, S1 is the data sent by the Di port of the controller, and S2, S3, S4, and Sn are the data forwarded by the cascaded CXLE87189.
Controller Di and Fi2 port data structure: C1C2C3D1D2D3D4… … Dn；
Controller Fi Port Data Structure: C1C2C3DxD1D2D3… … Dn；
Among them, Dx is any 24 bit data bit.
The process of chip cascading, data transmission, and forwarding is as follows: the controller sends data S1, chip 1 receives C1, C2, and C3 for verification, and if
If the command is correct, forward C1, C2, and C3 while absorbing D1. If there is no Reset signal at this time, chip 1 will continue to forward the controller
The data sent; Chip 2 also receives C1, C2, and C3 for verification. If the command is correct, it forwards C1, C2, and C3 while absorbing D2
If there is no Reset signal at this time, chip 2 will continue to forward the data sent by chip 1. Repeat this process until the controller sends a Reset
Reset signal, complete a data refresh cycle, and the chip returns to the receiving preparation state. Reset low level is effective, maintaining low level for a long time
At 80&ms, the chip is reset.
Users can flexibly choose communication frequency based on pixel count, balancing refresh rate and system size.
5、 Electrical characteristics and parameters
5.1. Limit parameter
(1) The levels listed in the table above may cause permanent damage to the device and reduce its reliability when the chip is used for a long time. We do not recommend in it
Under any conditions, the chip operates beyond these limit parameters;
(2) All voltage values are tested relative to the system ground.
5.2. Recommended working conditions
5.3. Electrical Characteristics
5.4. Switch characteristics
5.5. temporal characteristic
(1) The chip can operate normally within the range of 830ns (frequency 1.2MHz) to 2.5-ms (frequency 400KHz) for 0-code or 1-code cycles, but 0-code and 1-code
The high-level time must comply with the corresponding numerical range in the table above;
(2) When no reset is required, the low-level time between bytes should not exceed 25 seconds, otherwise the chip may reset and then receive data again, making it impossible to achieve data
Correctly transmitted.
six、 PCB Design and System Suggestions
• Signal protectionDIN/FDIN/DO1/DO2: It is recommended to connect 100&Omega in series; Resistors to prevent damage from hot swapping.
• Power decouplingA 100nF capacitor should be connected between VDD and GND of each chip, and placed as close to the chip as possible.
• Ground wire designEnsure good isolation between power ground (constant current output) and signal ground (logic part).
• DENL wiringIn matrix applications, DENL control lines should be kept away from high-frequency signals to avoid false triggering.
7、 Packaging and size
7.1. Internal pin map of chip
1. Chip size: 400um * 600um
2. The thickness of the top aluminum layer of PAD is 3.554um
3. Please note that the substrate of the chip must be suspended or connected to GND
8、 Conclusion
CXLE87189 is known for itsSingle line controlTheDual channel redundancyTheHigh precision outputandFlexible matrix control capabilityBecoming an ideal choice in the field of LED full-color display and decorative lighting. Whether it's a simple LED strip project or a complex large screen system, this chip can provide stable, efficient, and highly consistent driving solutions.
For more technical information, sample application or design support, please visit the official website of Jiataimu:jtm-ic.comWe are committed to providing professional product services and system level technical support to our customers.
9Selection Guide for Related Chips; More similar products ....
| 512 protocol series | |||||||
| model | Port withstand voltage | number of channels | communication protocol | Single channel current | Gray level | package form | remark |
| CXLE87133AB | 26V | 1/4 | DMX512 | 3-60mA | two hundred and fifty-six | SOP16 | 512 protocol series, LED decoration driver chip |
| CXLE87133AB3 | 26V | three | DMX512 | 18mA | two hundred and fifty-six | SOP8 | 512 protocol series, LED decoration driver chip |
| CXLE87133AB4 | 26V | four | DMX512 |
18mA | two hundred and fifty-six | EOP8 | 512 protocol series, LED decoration driver chip |
| CXLE87133AC | 30V | four | DMX512 | 3-80mA | sixty-five thousand five hundred and thirty-six | SOP16/SSOP10(18mA) | LED decoration driver chip, Gaohui, 512 protocol series |
| CXLE87133ACE | 30V | three | DMX512 | 3-80mA | sixty-five thousand five hundred and thirty-six | SSOP10 | LED decoration driver chip, Gaohui, 512 protocol series |
| CXLE87133AC4 | 30V | four | DMX512 | 3-80mA | two hundred and fifty-six | SOP16 | LED decoration driver chip, 512 protocol series |
| CXLE87133AD | 30V | 1-4 | DMX512 | 1-64mA | sixty-five thousand five hundred and thirty-six | ESSOP10 | LED decorative driver chip, high current, software configurable, 512 protocol series |
| CXLE87133ADH | 30V | 1-4 | DMX512 | 10-200mA | sixty-five thousand five hundred and thirty-six | ESOP16 | LED decorative driver chip, high current, software configurable, 512 protocol series |
| CXLE87133AE0 | 30V | none | DMX512 | — | — | SOP8 | LED decoration driver chip, adjustable parameters, 512 protocol series |
| CXLE87133AC0 | - | none | DMX512 | — | — | SOP8 | LED decoration driver chip, pure forwarding, 512 protocol series |
| CXLE87133AL1 | 30V | 1-4 | DMX512 | 3-60mA | two hundred and fifty-six | SOP16 | LED decoration driver chip, 512 protocol series |
| CXLE87133BC | 30V | four | DMX512 | 3-80mA | sixty-five thousand five hundred and thirty-six | SOP16/SSOP10(18mA) | LED decoration driver chip, Gaohui, 512 protocol series |
| CXLE87133BCE | 30V | three | DMX512 | 3-80mA | sixty-five thousand five hundred and thirty-six | SSOP10 | LED decoration driver chip, Gaohui, 512 protocol series |
| Single line series | |||||||
| model | Port withstand voltage | number of channels | communication protocol | Single channel current | Gray level | package form | remark |
| CXLE8720four | 7V | none | — | — | — | SOP8 | LED decorative driver chip, single line series |
| CXLE8720five | 24V | three | Return to 0 | 18mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, rainbow internal control, single line series |
| CXLE8720six | 32V | twelve | Returning to 1 | <45mA | two hundred and fifty-six | SOP16 | LED decorative driver chip, constant voltage seven color internal control, single line series |
| CXLE8720seven | 32V | nine | Returning to 1 | <45mA | two hundred and fifty-six | SOP14 | LED decorative driver chip, constant voltage seven color internal control, single line series |
| CXLE87208-12 | 7V | four | Return to 0 | 12mA | two hundred and fifty-six | SOP8/Internal Sealing | LED decorative driver chip, single line series |
| CXLE8720nine | 10V | three | Return to 0 | 12mA | two hundred and fifty-six | Core sealing | LED decorative driver chip, single line series |
| CXLE87210 | 32V | four | Return to 0 | 18mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, single line series |
| CXLE87211B | 32V | four | Returning to 1 | 6.5-38mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, 400KHz, single wire series |
| CXLE87211A | 32V | four | Returning to 1 | 6.5-38mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, 200KHz, single wire series |
| CXLE87144D | 24V | twelve | Return to 0 | 17mA | two hundred and fifty-six | SOP16/DIP16 | LED decorative driver chip, single line series |
| CXLE87140H | 24V | three | Return to 0 | 14mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, single line series |
| CXLE87132B | 32V | four | Returning to 1 | 6.5-38mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, single line series |
| CXLE87143D | 24V | 6 or 9 | Return to 0 | 17mA | two hundred and fifty-six | SOP14/DIP14 | LED decorative driver chip, single line series |
| CXLE8714four | 24V | twelve | Returning to 1 | 20mA | two hundred and fifty-six | SOP16/DIP16 | LED decorative driver chip, rainbow internal control, single line series |
| CXLE8714three | 30V | nine | Returning to 1 | 20mA | two hundred and fifty-six | SOP14/DIP14 | LED decorative driver chip, rainbow internal control, single line series |
| CXLE87140 | 24V | three | Returning to 1 | 18mA | two hundred and fifty-six | SOP8/MSOP8 | LED decorative driver chip, rainbow internal control, single line series |
| CXLE8713two | 32V | four | Returning to 1 | 6.5-38mA | two hundred and fifty-six | SOP8 | LED decorative driver chip, rainbow internal control, single line series |
| CXLE8714seven | 24V | twelve | Return to 0 | <45mA | two hundred and fifty-six | SOP16/DIP16 | LED decorative driver chip, constant voltage, single wire series |
| CXLE8714five | 24V | nine | Return to 0 | <45mA | two hundred and fifty-six | SOP14/DIP14 | LED decorative driver chip, constant voltage, single wire series |
| CXLE87152 | 24V | three | Return to 0 | <45mA | two hundred and fifty-six | SOP8/DIP8 | LED decorative driver chip, constant voltage, single wire series |
| CXLE87151 | 24V | three | Return to 0 | <45mA | two hundred and fifty-six | SOP8/DIP8 | LED decorative driver chip, constant voltage, 400KHz, constant voltage, single wire series |
| Constant current diode | |||||||
| model | Port withstand voltage | number of channels | communication protocol | Single channel current | Gray level | package form | remark |
| CXLE87182-X | 24V | one | — | 10-18-30-60mA | External PWM | SOT-23/TO-92/SOD-123 | LED decorative driver chip, minimum 2.2V, constant current diode |
| CXLE87183-X | 24V | one | — | 5-65mA,+5mA per gear | External PWM | SOT23-3/SOT-89 | LED decorative driver chip, constant current diode |
| CXLE8718four | 24V | one | — | 15-350mA | External PWM | SOT23-6/ESOP8 | LED decorative driver chip, constant current diode |
| CXLE87185-X | 40V | one | — | 10～45mA | External PWM | SOT23-3 | LED decorative driver chip, constant current diode |
| Meteor lights Christmas lights | |||||||
| model | Port withstand voltage | number of channels | communication protocol | Single channel current | Gray level | package form | remark |
| CXLE8718six | 7V | six | internal control | Maximum 80mA | — | SOP8 | LED decoration driver chip, meteor effect, meteor light Christmas light |
| CXLE8718seven | 24V | sixteen | Internal/External Control | 32mA | — | SOP20/DIP20 | LED decoration driver chip, meteor light Christmas light |
| CXLE8718eight | 24V | sixteen | Internal/External Control | 16mA | — | SOP20/DIP20 | LED decoration driver chip, meteor light Christmas light |
| CXLE8714eight | 24V | six | internal control | 45, maximum 90mA | — | SOP8/DIP8 | LED decoration driver chip, meteor light Christmas light |
| CXLE8714nine | - | two | internal control | — | — | SOP8 | LED decoration driver chip, meteor light Christmas light |
| CXLE8713seven | 24V | twelve | Internal/External Control | 32mA | — | SOP16/DIP16 | LED decoration driver chip, meteor light Christmas light |
| CXLE8713six | 24V | twelve | Internal/External Control | 16mA | — | SOP16/DIP16 | LED decoration driver chip, meteor light Christmas light |
| CXLE87150 | 24V | twelve | internal control | 45, maximum 90mA | Level 16 | SOP16/DIP16 | LED decoration driver chip, meteor light Christmas light |
| CXLE87153 | 24V | three | Internal/External Control | 82mA | — | SOP8/DIP8 | LED decoration driver chip, meteor light Christmas light |
| Double line series | |||||||
| model | Port withstand voltage | number of channels | communication protocol | Single channel current | Gray level | package form | remark |
| CXLE8718nine | 7V | three | Return to 0 | 2-25mA | 65536 Gamma | Core sealing | LED decoration driver chip, 8-bit, meteor light Christmas light |
| CXLE87190 | VDDV | eighteen | I2C | 3-40mA | one hundred and twenty-eight | QSOP24/QFN24 | LED decoration driver chip, meteor light Christmas light |
| CXLE8719one | VDDV | eighteen | I2C | 38mA | two hundred and fifty-six | QFN24/SOP24 | LED decoration driver chip, meteor light Christmas light |
| CXLE8719two | 24V | three | Return to 0 | 14mA | two hundred and fifty-six | SOP8 | LED decoration driver chip, meteor light Christmas light |
| CXLE8719three | 7V | three | Return to 0 | 12mA | sixty-five thousand five hundred and thirty-six | SOP8 | LED decoration driver chip, meteor light Christmas light |
| CXLE8719four | 7V | three | Return to 0 | 12mA | sixty-five thousand five hundred and thirty-six | Core sealing | LED decoration driver chip, meteor light Christmas light |
| CXLE8719five | 7V | three | Return to 0 | 12mA | sixty-five thousand five hundred and thirty-six | Core sealing | LED decoration driver chip, meteor light Christmas light |
| CXLE8719six | 7V | three | Return to 0 | 0.73-12mA | sixty-five thousand five hundred and thirty-six | Core sealing | LED decoration driver chip, 16 bit, meteor light Christmas light |
| CXLE8719seven | 7V | three | Return to 0 | 2-17mA | sixty-five thousand five hundred and thirty-six | Core sealing | LED decoration driver chip, 16 bit, meteor light Christmas light |
| CXLE8719eight | 12V | three | Return to 0 | 12mA | four thousand and ninety-six | SOP8、 Inverted and integrated wick packaging | LED decoration driver chip, low-power mode, meteor light Christmas light |
| CXLE8719nine | 7V | three | Return to 0 | 12mA | four thousand and ninety-six | Inverted and integrated wick | LED decoration driver chip, low-power mode, meteor light Christmas light |
| CXLE87200 | 7V | three | Return to 0 | 2.5mA | four thousand and ninety-six | Inverted and integrated wick | LED decoration driver chip, low-power mode, meteor light Christmas light |
| CXLE8720one | 7V | three | Return to 0 | 5mA | four thousand and ninety-six | Inverted and integrated wick | LED decoration driver chip, low-power mode, meteor light Christmas light |
| CXLE8720two | 12V | three | Return to 0 | 12mA | four thousand and ninety-six | SOP8、 Inverted and integrated wick packaging | LED decoration driver chip, low-power mode, meteor light Christmas light |
| CXLE8720three | 12V | three | Return to 0 | 12mA | four thousand and ninety-six | SOP8、 Inverted and integrated wick packaging | LED decoration driver chip, low-power mode, meteor light Christmas light |
| CXLE87141A | 24V | three | Returning to 1 | 18mA | two hundred and fifty-six | SOP8 | LED decoration driver chip, meteor light Christmas light |
