CXLE87196 is a dedicated circuit that integrates MCU single wire digital interface, data latch, LED constant current drive, and PWM brightness control functions. Adopting integrated wick packaging, it has high integration and reliability. The chip supports a working voltage of 3.5V to 5.5V, and each channel can independently set the output current, ranging from 0.73mA to 12mA, with a total of 32 adjustable levels. Each channel of RGB supports 16 bit grayscale, achieving 65536 levels of true brightness control, with delicate and rich color expression.
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[ CXLE87196 ]"
In the field of LED lighting and control, efficient, stable, and flexible driver chips are the key to ensuring system performance. CXLE87196, as a high-performance single line three channel LED constant current driver chip, is widely used in scenarios such as point light sources, guardrail tubes, soft light strips, indoor and outdoor large screens due to its excellent integration and control accuracy. This article will provide an in-depth analysis of the technical features, application solutions, and advantages of CXLE87196 in system design, to assist engineers in better selecting this chip and improving project efficiency.
1、 Chip Overview
CXLE87196 is a dedicated circuit that integrates MCU single wire digital interface, data latch, LED constant current drive, and PWM brightness control functions. Adopting integrated wick packaging, it has high integration and reliability. The chip supports a working voltage of 3.5V to 5.5V, and each channel can independently set the output current, ranging from 0.73mA to 12mA, with a total of 32 adjustable levels. Each channel of RGB supports 16 bit grayscale, achieving 65536 levels of true brightness control, with delicate and rich color expression.
2、 Core functional features
2.1. High precision constant current output
• The inter channel error shall not exceed± 3%, with inter chip error not exceeding± 5%.
• The output current remains stable within a wide voltage range and has strong resistance to voltage fluctuations.
2.2. Dual channel input and cascade interface
• Supports dual data input of DI and FDI, which can be switched through commands.
• Capable of DO data forwarding and output, supporting infinite cascading, with no signal attenuation or distortion.
• The backup communication port ensures that when a chip is damaged, it does not affect the subsequent operation of the chip, thereby improving system reliability.
2.3. Ultra low power design
• The standby current is less than 1μ A, suitable for power sensitive application scenarios.
2.4. Built in oscillation and clock synchronization
• The chip has a built-in oscillation circuit that can automatically synchronize the clock based on data signals, without the need for an external crystal oscillator.
2.5. Flexible PWM and control commands
• Supports 48 bit mode setting commands and 16× 3-digit PWM data format, each chip can independently set current and grayscale.
3、 Electrical characteristics and working conditions
CXLE87196 operates stably within the temperature range of -40 ℃ to+85 ℃, with a recommended power supply voltage of 5V. Its data rate is as high as 1.2MHz, and the OUT port PWM frequency is 4kHz, with fast response and no flicker. The chip has good ESD protection capability and can withstand human mode static electricity up to 2000V, making it suitable for industrial and outdoor environments.
3.1. 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.
3.2. Recommended working conditions
3.3. Electrical Characteristics
3.4. Switch characteristics
3.5. temporal characteristic
(1) The chip can operate normally within the range of 830ns (frequency 1.2MHz) to 2.5us (frequency 400KHz) for 0 or 1 code cycles, but 0 and 1 code are high
The voltage 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 25us, otherwise the chip may reset and then receive data again, making it impossible to achieve data
Correctly transmitted.
3.6. Functional Description
3.6.1 Mode Settings
This chip is for single wire dual channel communication and sends signals using reset codes.
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 code. The chip reset starts accepting data. There are two types of mode setting commands:
(1) 0XFFFFFF_000000 command:
The chip is configured to operate in normal mode. In this mode, the chip performs different patterns based on the received data.
(2) 0XAAAAAAA_555555 command:
The chip is configured for channel detection mode. In this mode,
① If the red light is on, it indicates that the DI channel is reliable.
② If the green light is on, it indicates that the FDI channel is reliable.
③ If the white light is on, both the DI and FDI channels are reliable.
3.6.2 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 48 bits
Afterwards, the DO port starts forwarding data that continues to be sent by the DI or FDI end, providing display data for the next cascaded chip. Before forwarding data, DO
The port has always been at a low level. If the DI or FDI end inputs a Reset signal, the OUT port of the chip will display data based on the received 48 bit data
Output PWM waveforms with corresponding duty cycles, and the chip waits for new data to be received again. After receiving the initial 48 bit data, it passes through the DO terminal
The data is forwarded through the 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.
3.6.3. One 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, where 0XFFFFFF000000
For normal working mode commands, 0XAAAAAAA_555555 is the DI/FDI channel detection mode command, C3 is the constant current value setting command, and each core
The film will receive and forward C1, C2, and C3.
D1、D2、D3、D4、… … 、 Dn is the PWM setting command for each chip.
Reset indicates a reset signal, low level is valid.
3.6.4 Data format of C3
The C3 command contains 8× 3 bits of data, with high bits starting first, and R [7:5], G [7:5], and B [7:5] fixed to 000.
R [4:0]: Used to set the constant current value of R output. When R [4:0]=0.0000, it is 0.73mA, and when 1_1111, it is 12mA, with 32 adjustable levels.
G [4:0]: Used to set the constant current value of G output. G [4:0]=0.73mA when 0_0000, 12mA when 1_1111, adjustable in 32 levels.
B [4:0]: Used to set the constant current value of B output. B [4:0]=0.73mA when 0_0000, 12mA when 1_1111, adjustable in 32 levels.
The current gain setting is as follows:
3.6.5 Data format of Dn
BIT47… … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … BIT0
Each PWM setting command contains 16× 3 bits of data, with the higher bits sent first, in the order of RGB.
R [15:0]: Used to set the PWM duty cycle of R output. All 0 codes indicate shutdown, all 1 code indicates maximum duty cycle, and 65536 levels are adjustable.
G [15:0]: Used to set the PWM duty cycle of G output. All 0 codes indicate shutdown, all 1 code indicates maximum duty cycle, and 65536 levels are adjustable.
B [15:0]: Used to set the PWM duty cycle of B output. All 0 codes indicate shutdown, all 1 code indicates maximum duty cycle, and 65536 levels are adjustable.
3.6.6 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 CXLE87196.
Controller Di Port Data Structure: C1C2C3D1D2D3D4… … Dn；
Controller Fi Port Data Structure: C1C2C3DxD1D2D3… … Dn；
Among them, Dx is any 48 bit data bit, and any one of D1... Dn is a 48 bit display data.
The process of chip cascading and 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
Continue to send data; 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. And so on, until the controller
Send a Reset signal to complete a data refresh cycle, and the chip returns to the receiving preparation state. Reset low level is effective, keep low power
If the average time is greater than 80us, the chip will reset. Among them, Dn-0 represents the high 24 bits of Dn, and Dn-1 represents the low 24 bits of Dn.
3.6.7 Constant current curve
When applying CXLE87196 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 (with a constant current drive output range of 0.73mA to 12mA) is shown in the following figure:
4、 Typical Application Circuit
4.1. Dual line cascaded architecture
The controller sends data through DI or FDI, and the chip receives and forwards it in sequence, forming a cascaded link. After each chip receives its own data, it automatically forwards subsequent data to the next level to achieve overall control.
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.
4.2. Protection design suggestions
• Connect 100Ω in series with DI, FDI, and DO ports; Resistors prevent high-voltage damage to chips during insertion and removal.
• A 0.1 μ F decoupling capacitor should be connected between VDD and GND of each chip, and placed as close as possible to the chip pins to enhance system stability.
4.3. Input-output equivalent circuit
4.4. Internal structure diagram
5、 Data refresh rate calculation
Taking a data rate of 1.2MHz as an example, the transmission time for each pixel (48 bits) is approximately 40 seconds. If the system cascades 400 chips, the refresh time of the entire system is 16ms, and the refresh rate can reach 62.5Hz, meeting most dynamic display requirements.
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 CXLE87196 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 R (16 bits), G (16 bits), and B (16 bits)
48 bits in total, with a transmission time of 830ns× 48≈ 40us. If there are a total of 400 pixels in a system, when refreshing all displays at once
Between 40us× 400=16ms (ignoring C1, C2, and Reset signal times), which means a one second refresh rate of 1÷ 16ms=62.5Hz。
The following is a table of the highest data refresh rate corresponding to cascading points:
6、 Applicable fields
• Point light source and guardrail tubeAccurately control each LED to achieve colorful dynamic effects.
• flexible LED stripSingle line control simplifies wiring and supports long-distance cascading.
• Indoor and outdoor large screensHigh refresh rate and high grayscale level ensure smooth image and realistic color.
7、 Packaging and Size
7.1. Pin Function
7.2. Internal pin map of chip
1. Chip size: 413um * 413um
2. The thickness of the top aluminum layer of PAD is 3.6um
3. Please note that the substrate of the chip must be suspended or connected to GND
8、 Conclusion
CXLE87196 has become the preferred solution in the LED driver field due to its high integration, high precision, high reliability, and flexible cascading capability. Whether it is a complex full-color display system or simple decorative lighting, this chip can provide excellent performance support. For more technical details or to obtain samples, please visitJTM-IC official websiteOr contact our technical support team.
nineTheSelection 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 |
