• [ CXLE88183 ]"

Ordering

CXLE88183 high voltage LED constant current driver chip: 16 channel precision dimming and efficient lighting solutions

In the LED lighting and display system, the constant current accuracy, output voltage capability and dimming flexibility of the driver chip directly affect the overall performance and reliability. As a 16-channel constant current driver chip designed for medium and high power LED applications, CXLE88183 has become the preferred driving scheme for industrial lighting, commercial display and dimming systems with its output port withstand voltage of up to 30V, wide range current output and integrated PWM dimming function. This article will deeply analyze the technical characteristics, electrical parameters, typical application circuits and flow expansion design of the CXLE88183, and provide the JTM-IC website (jtm-ic.com) User provides system-level design reference.l6i嘉泰姆

1. Product Overview

CXLE88183 is a high-performance 16-channel constant current LED driver chip, each output port can provide accurate constant current in the range of 5mA ~ 35mA, and the output current does not fluctuate with the load voltage. The chip supports flexible setting of output current through external resistors, with excellent channel consistency and chip-to-chip consistency, and is suitable for LED display and lighting systems that require high brightness uniformity. Its output port withstand capability of up to 30V enables it to directly drive multiple series-connected LEDs, extending system design flexibility.l6i嘉泰姆

2. core features

2.1. 16 channel high precision constant current output:

Each output current can be set in the range of 5mA ~ 35mA, the deviation between channels is ≤ 3%, and the deviation between chips is ≤ 5%, ensuring that the LED brightness is highly consistent.l6i嘉泰姆

2.2. High output port withstand voltage:OUT0 ~ OUT15 port withstand voltage up to 30V, can directly drive multiple series LED, simplify the system power supply design.l6i嘉泰姆

2.3. External resistor setting output current:

Through the R-EXT pin external resistor, the output current value of all channels can be accurately set, the calculation formula is as follows:l6i嘉泰姆

IoT = 1.20v/rext × 15l6i嘉泰姆
l6i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. When electricityl6i嘉泰姆
When the resistance is 1KΩ, the output current is 18mA.l6i嘉泰姆
l6i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 enter the constant current.l6i嘉泰姆
The voltage at the flow turning point is different. As can be seen in the figure, the constant current voltage point & asymp at 30mA; 0.8V, while the constant current voltage point drops to & asymp at 15mA; 0.5V,l6i嘉泰姆
When designing the circuit, the voltage drop at the OUTx end should be fully considered to avoid the driving current not reaching the set pre-value.l6i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, resulting inl6i嘉泰姆
The heat of the chip is serious, which affects the stability of the system.

2.4. Integrated PWM dimming control:The PWM pin supports dimming frequencies up to 1MHz, enabling stepless adjustment of LED brightness via an external PWM signal.l6i嘉泰姆

2.5. The output port can be expanded in parallel;Each OUT port supports short-circuiting for larger current output to meet high power LED drive requirements.l6i嘉泰姆

2.6. Wide voltage working range:VDD operating voltage of 4.5V ~ 5.5V, compatible with standard 5V logic system.l6i嘉泰姆

2.7. Excellent temperature characteristics;Operating temperature range -40 ℃ ~ 85 ℃, suitable for industrial application environment.l6i嘉泰姆

3. pin function and internal structure

CXLE88183 provide SOP20 and TSSOP 1000.00g package forms, pin definition is clear, easy system integration:l6i嘉泰姆

•   GND: Chip groundl6i嘉泰姆

•   PWMDimming control input, internal integrated pull-up resistorl6i嘉泰姆

•   OUT0~OUT1516 constant current outputl6i嘉泰姆

•   R-EXT: external resistor sets currentl6i嘉泰姆

•   VDD: Chip power supply (4.5V ~ 5.5V)l6i嘉泰姆

The chip integrates constant current regulation module and PWM control module, which has simple structure and high reliability.l6i嘉泰姆

4. electrical characteristics and performance parameters

4.2. Absolute maximum rating rangel6i嘉泰姆
l6i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 mayl6i嘉泰姆
Permanent damage can occur. It is not recommended to operate the chip beyond these limit parameters under any other conditions.l6i嘉泰姆
(2) All voltage values are tested relative to the network groundl6i嘉泰姆
4.3. Recommended Scope of Working Conditionsl6i嘉泰姆
l6i嘉泰姆
4.4.Electrical characteristicsl6i嘉泰姆

Under the test conditions of VDD = 5V and TA = 25 ℃, the CXLE88183 shows excellent electrical performance:l6i嘉泰姆

•   Constant current output range：5mA~35mAl6i嘉泰姆

•   Reference voltage: 1.20V (typical)l6i嘉泰姆

•   Power supply current9mA ~ 12mA (according to different working conditions)l6i嘉泰姆

•   linear adjustment rate: ± 0.5%/V (typical)l6i嘉泰姆

•   Load adjustment rate: ± 1%/V (typical)l6i嘉泰姆

•   ESD protection level：HBM 3000Vl6i嘉泰姆

5. Typical Application Circuit Design

5.1. 5V system application

In the 5V power supply system, a single LED can be directly driven without additional current limiting resistor, and the PWM pin can be directly connected to the MCU to realize dimming control.l6i嘉泰姆

l6i嘉泰姆
As shown in the figure above, it is a CXLE88183 5V application circuit diagram. In the case of 5V power supply, each output port is connected to a lamp bead, outputl6i嘉泰姆
Both the port and the VDD port can be connected without resistors. The PWM port can directly control the brightness of the lamp beads through the program.l6i嘉泰姆

5.2. 12V/24V system application

In the 12V or 24V power supply system, it is necessary to provide 5V stable voltage for VDD through the regulator tube. OUT port can drive multiple series LED (such as 12V system can drive 3 white LED), if the use of red LED series current limiting resistor.l6i嘉泰姆
l6i嘉泰姆
As shown in the figure above, it is a CXLE88183 12V application circuit diagram. Under the condition of 12V power supply, a voltage regulator tube is required to provide VDD portl6i嘉泰姆
For about 5V voltage. Each output port can be connected to three series of lamp beads. If the lamp bead is red, connect the resistor R. If notl6i嘉泰姆
The red light can save the resistance. The PWM port can directly control the brightness of the lamp beads through the program.l6i嘉泰姆

l6i嘉泰姆
As shown in the figure above, it is a CXLE88183 24V application circuit diagram. Under the condition of 24V power supply, it is necessary to connect the voltage regulator to the VDD port.l6i嘉泰姆
For about 5V voltage. The PWM port can directly control the brightness of the lamp beads through the program.l6i嘉泰姆

5.3. Expanding application design.

By shorting multiple OUT ports, multiplication of the output current can be achieved. For example, short-circuiting two OUT ports, the maximum output current can reach 70mA, which is suitable for high-power LED drive scenarios.l6i嘉泰姆
l6i嘉泰姆
As shown in the figure above, it is a CXLE88183 circuit diagram for expanding current applications. In the case of power supply greater than 5V, it is necessary to connect the voltage regulator to the VDD terminal.l6i嘉泰姆
The port provides a voltage of about 5V. The PWM port can directly control the brightness of the lamp beads through the program.l6i嘉泰姆

6. Design Considerations

6.1. Constant current point voltage consideration

The constant current transition voltage under different output currents is different, such as about 0.8V at 30mA and about 0.5V at 15mA. The design should ensure that the OUT port voltage drop is higher than this value to ensure the constant current effect.l6i嘉泰姆

6.2. Thermal Management

The OUT port should not work in a high voltage drop state for a long time, otherwise it will cause the chip power consumption to increase, the temperature rise is too high, and the system stability is affected.l6i嘉泰姆

6.3. PCB Layout Recommendations

•   0.1μF decoupling capacitor shall be arranged between VDD and GNDl6i嘉泰姆

•   The R-EXT resistor should be as close as possible to the chip pin to reduce noise interferencel6i嘉泰姆

•   Large current traces should be wide enough to reduce voltage drop and heat accumulationl6i嘉泰姆

7. Application Areas

CXLE88183 suitable for a variety of LED drive scenarios:l6i嘉泰姆

•   LED lighting systemDownlight, panel light, mining lampl6i嘉泰姆

•   LED Dimming ApplicationsIntelligent lighting, stage lightingl6i嘉泰姆

•   LED display driver: advertising light box, sign light platel6i嘉泰姆

•   INDUSTRIAL CONTROL INDICATINGEquipment status indication, instrument backlightl6i嘉泰姆

8. epilogue

With its high withstand voltage, high precision, flexible dimming and current expansion capabilities, the CXLE88183 provides a reliable and efficient drive solution for LED lighting and display systems. Whether it is a simple indicator lighting or a complex dimming system, CXLE88183 can meet the design requirements. As a professional IC supplier, JTM-IC are committed to providing customers with quality products and technical support.l6i嘉泰姆

For CXLE88183 samples, technical data or procurement information, welcome to visitJTM-IC official websiteOr contact our technical support team.l6i嘉泰姆

Nine,Related Chip Selection GuideMore similar products.....l6i嘉泰姆

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

Back to top

Next▶:CXLE88184 Constant Current LED Driver-High Precision Display and Lighting Solutions | JTM-IC