• [ CXLE88181 ]"

Ordering

CXLE88181 LED driver chip: high-performance 16-channel constant current drivera3L嘉泰姆

In modern LED display technology and lighting applications, the performance of the driver chip directly determines the display effect and system stability. As a high-performance driver integrated circuit specially designed for LED modules and displays, CXLE88181 has demonstrated excellent performance in various LED display and lighting scenarios with its excellent current control capability, excellent anti-interference characteristics and efficient refresh mechanism. This article will deeply analyze the technical characteristics, functional advantages and application information of the CXLE88181, help engineers and purchasers to fully understand this chip, and provide JTM-IC official website (jtm-ic.com2) The user shall provide detailed technical reference.a3L嘉泰姆

1. Product Overview

CXLE88181 is a 16-channel constant current output LED driver chip, suitable for all kinds of LED display module, full color display, lighting and energy-saving lighting system. The chip adopts advanced enhanced blanking technology, which effectively solves the problem of dark brightness of the first line of the LED screen, and has the function of preventing damage to the LED lamp beads, which significantly extends the overall service life. Its excellent anti-interference ability and low gray optimization effect, so that it can still maintain stable operation in complex environment.a3L嘉泰姆

2. core features

1. Multi-channel constant current output

The CXLE88181 supports 16 independent constant current outputs, and each current can be flexibly set within the range of 3 ~ 32mA(VDD = 5V) or 3 ~ 25mA(VDD = 3.3V) to meet LED driving scenes with different brightness and power requirements.a3L嘉泰姆

2. High precision current control

The high-precision current control circuit is integrated inside the chip, and the current deviation between channels is controlled within ± 2.0%, and the deviation between chips does not exceed ± 3%, which ensures the consistency and stability of the display screen.a3L嘉泰姆

3. External resistance adjustment mechanism

Users can accurately set the output current value through an external resistor (R-EXT) to achieve precise control of the LED brightness and adapt to diverse application scenarios.a3L嘉泰姆

4. High-speed data transmission and dual-cache architecture

Support up to 30MHz serial data transmission rate, built-in dual cache structure, in the display process can continue to receive new data, refresh rate than the traditional constant current chip increased by more than 50%, significantly improving the dynamic display effect.a3L嘉泰姆

5. Excellent anti-interference and visual optimization

Integrated Schmitt trigger to enhance the stability of the input signal; with excellent blanking effect and low grayscale optimization ability to enhance the visual experience.a3L嘉泰姆

6. Wide voltage working range

Operating voltage range of 3.3V ~ 6V, compatible with a variety of system power design.a3L嘉泰姆

7. Diversified packaging options

QFN24 and SSOP24 -31.75g packages are available to adapt to different PCB layouts and heat dissipation requirements.a3L嘉泰姆

3. internal structure and pin function

The CXLE88181 integrates 16-bit shift register, data latch and constant current control circuit, and supports control signals such as serial data input (SDI), clock (CLK), latch (LA) and output enable (OEN). Its pin function is clear and clear, easy to system integration and debugging:a3L嘉泰姆

•   SDISerial data inputa3L嘉泰姆

•   CLK: shift clock inputa3L嘉泰姆

•   LAData latch controla3L嘉泰姆

•   OEN: Output enable controla3L嘉泰姆

•   R-EXT: External resistor sets the output currenta3L嘉泰姆

•   SDOSerial data output, support cascade expansiona3L嘉泰姆

•   OUT0~OUT15: 16 constant current output terminalsa3L嘉泰姆

4. electrical characteristics and performance parameters

4.1. Input and output equivalent circuita3L嘉泰姆
a3L嘉泰姆
4.2. Limit parametersa3L嘉泰姆
a3L嘉泰姆
a3L嘉泰姆
(1) These grades in the above table cannot allow the chip to work at the limit value for a long time. If the chip works at the limit value for a long time, it is easy to reduce the reliability of the device and maya3L嘉泰姆
Permanent damage can occur. It is not recommended to operate the chip beyond these limit parameters under any other conditions.a3L嘉泰姆
(2) All voltage values are tested relative to the network grounda3L嘉泰姆
4.3. Electrical characteristicsa3L嘉泰姆
a3L嘉泰姆
4.4. DC characteristicsa3L嘉泰姆
a3L嘉泰姆
4.5. Dynamic characteristics.a3L嘉泰姆
a3L嘉泰姆
4.5.Switching characteristicsa3L嘉泰姆

Under the condition of VDD = 5V and 25 ℃, the CXLE88181 shows stable electrical performance:a3L嘉泰姆

•   High output current accuracy, typical deviation of only ± 0.15mAa3L嘉泰姆

•   Supply voltage regulation better than ± 0.2%a3L嘉泰姆

•   Output voltage regulation better than ± 0.1%a3L嘉泰姆

•   Minimum output pulse width up to 30ns, fast responsea3L嘉泰姆

•   Wide operating temperature range:-40 ℃ to 85 ℃a3L嘉泰姆

5. Typical Applications and Design Recommendations

5.1. Output current setting

The output current can be accurately set by an external resistor R-EXT, and the calculation formula is as follows:a3L嘉泰姆

For example, when the R-EXT is 600Ω, the output current is about 30mA; when the R-EXT is 1KΩ, the output current is about 18mA.a3L嘉泰姆
RIREF in the formula refers to the resistance of the R-EXT terminal. When the resistance value is 600 Ω, the output current value is 30mA calculated by the formula; Whena3L嘉泰姆
When the resistance value is 1KΩ, the output current is 18mA.a3L嘉泰姆

5.2. System layout recommendations

In order to reduce the impact of electromagnetic interference on signal quality, it is recommended to arrange the CXLE88181 as close to the LED display module as possible, and optimize the power supply and ground wiring.a3L嘉泰姆

5.3. Heat dissipation and power management

The OUTx terminal should not be in a high voltage drop state for a long time when it is turned on, otherwise it will increase the chip power consumption and temperature rise, and affect the stability of the system. The LED string voltage and driving current should be reasonably selected during design.a3L嘉泰姆
5.4. Switching characteristic test circuita3L嘉泰姆
a3L嘉泰姆
5.5. Timing characteristicsa3L嘉泰姆

a3L嘉泰姆

5.6. Logic Diagrama3L嘉泰姆
a3L嘉泰姆
5.7 constant currenta3L嘉泰姆
a3L嘉泰姆
The R-EXT pin is connected to GND with different resistance values to obtain different constant currents at the output of the OUT pin, but different constant currents flow in.a3L嘉泰姆
The turning point voltage of the input constant current is different. As can be seen from the figure, the constant current voltage point & asymp at 30mA; 0.6V, while the constant current voltage point drops to 20mAa3L嘉泰姆
& asymp;0.5V, the voltage drop at OUTx terminal should be fully considered when designing the circuit, so as not to drive the current to reach the set value.a3L嘉泰姆
In addition, the OUTx terminal is not suitable to work at a high voltage drop for a long time when it is turned on, which will increase the power loss of the chip and thus lead.a3L嘉泰姆
It causes serious chip heating and affects the stability of the system.a3L嘉泰姆
In practical application, may be due to signal traces or other factors of electromagnetic interference, in order to avoid such failures, it is recommended to CXLE88181a3L嘉泰姆
The shorter the distance from the LED display module, the better.a3L嘉泰姆

6. Application Areas

CXLE88181 are widely used in the following scenarios:a3L嘉泰姆

•   Indoor and outdoor monochrome, two-color, full-color LED displaya3L嘉泰姆

•   Static and dynamic display modulea3L嘉泰姆

•   LED Lighting and Energy Saving Lighting Systema3L嘉泰姆

•   Billboard, information release screen, stadium displaya3L嘉泰姆

7. epilogue

CXLE88181 with its high precision, high refresh rate, strong anti-interference ability and flexible current control mechanism, become the ideal choice in the field of LED display and lighting drive. Whether it is the pursuit of high-quality full-color display, or focus on the stability of the industrial-grade lighting system, CXLE88181 can provide reliable technical support. As a professional integrated circuit supplier, JTM-IC will continue to provide customers with high-quality products and technical services.a3L嘉泰姆

For more information on the technical details of the CXLE88181, sample application or procurement information, welcome to visitJTM-IC official websiteOr contact our technical support team.a3L嘉泰姆

8.Related Chip Selection GuideMore similar products.....a3L嘉泰姆

◀ Previous:CXLE88180 constant current LED driver chip -16 channel high precision, 3-36mA adjustable, suitable for full color display

Back to top

Next▶:CXLE88182 single-wire serial LED driver chip | 8 × 4 scan driver, support cascade | JTM-IC