CXCH7690C/CXCH7690MC is a highly integrated USB dedicated charging port control chip designed specifically for detecting and configuring USB data lines to achieve compatibility with various charging devices. The chip integrates a 40m Ω low impedance MOSFET switch, supports BC1.2 DCP protocol and Apple 2.4A charging mode, and can automatically identify the connected device type and provide the optimal charging solution.
-
[ CXCH7690 ]"
CXCH7690: High performance USB dedicated charging port control chip, achieving intelligent fast charging and comprehensive protection
With the popularity of mobile devices such as smartphones and tablets, users' requirements for charging speed and charging safety are increasing day by day. The CXCH7690 series, as a control chip designed specifically for USB charging ports, provides a complete solution for chargers, adapters, and car chargers by intelligently identifying device types, providing precise current limiting, and comprehensive safety protection.
Chip Overview
CXCH7690C/CXCH7690MC is a highly integrated USB dedicated charging port control chip designed specifically for detecting and configuring USB data lines to achieve compatibility with various charging devices. Integrated 40m&Omega inside the chip; Low impedance MOSFET switch, supporting BC1.2 DCP protocol and Apple 2.4A charging mode, capable of automatically identifying the connected device type and providing the optimal charging solution.
This series offers two packaging forms, ESOP8 and EMSOP8, to meet the space and heat dissipation requirements of different application scenarios. By accurately setting the current limit value through an external resistor, the chip can provide± 8% high-precision current limit ensures charging safety while maximizing charging efficiency.
Core Features and Advantages
1. Multi protocol compatibility and intelligent recognition
• BC1.2 DCP modeStandard charging protocol that supports short circuiting of D+and D - lines
• Apple 2.4A charging modeLoad 2.7V voltage on D+and D - lines to provide maximum 2.4A charging current for Apple devices
• Automatic device recognitionIntelligent detection of connected device types, automatic switching of charging modes
2. High precision current management
• External resistor setting current limit valueAccurate configuration of output current limit through RSET resistor
• ± 8% current limiting accuracyProvide precise current control to ensure safe charging
• Quick response protectionQuick response within 2us under overcurrent conditions, effectively protecting the front-end power supply
3. Comprehensive system protection
• Output short circuit protectionEnter Hiccup intermittent working mode to prevent system damage
• over-temperature protectionIntegrated thermal shutdown function, automatically shuts off when the junction temperature reaches 130 ℃
• Under voltage lockingAutomatically turn off when the input voltage is below 4V to ensure normal operating range
• Anti reverse currentIntegrated non body diode MOSFET effectively prevents reverse current transmission
4. Efficient power management
• Low conduction impedanceIntegrated 40mΩ MOSFET， Reduce power loss
• Low static currentOnly 110μ A in standby mode, optimizing light load efficiency
• Quick start stop control2ms on time and 10us off time to improve system response speed
Detailed explanation of technical specifications
Electrical characteristic parameters
| parameter | test conditions | minimum | typical value | maximum | unit |
|---|---|---|---|---|---|
| Input voltage range | four point five | five | five point five | V | |
| Static working current | Load open circuit, IC standby | - | one hundred and ten | - | μA |
| MOS conduction impedance | thirty-five | forty | forty-five | mΩ | |
| Short circuit response time | Output load from 1/2 of full load to 50mΩ Short circuit to ground | - | two | - | μs |
| Overcurrent threshold | RSET=2.2KΩ | two point five | two point seven five | three point one | A |
| Thermal shutdown temperature | - | one hundred and thirty | - | ℃ |
Voltage characteristics of charging mode
• BC1.2 DCP modeD+/D - output voltage 1.2V± 10%, output impedance 100KΩ
• Apple 2.4A modeD+/D - output voltage 2.7V± 0.2V， Output impedance 30KΩ
Application Plan and Design Guidelines
Typical application scenarios
• USB charging adapterProvide fast charging for various types of mobile phones and tablets
• car chargerMeet the charging needs in the car environment and have good anti-interference ability
• USB powered devicesVarious electronic devices powered by USB ports
• power bankOptimize the management and control of output ports
Device Selection Guide
| Part Number | screen printing | Overcurrent configuration resistor | encapsulation | Applicable scenarios |
|---|---|---|---|---|
| CXCH7690CA | CXCH7690C XXXXXX | RSET=2.2KΩ | ESOP8 | Standard 2.75A current limiting application |
| CXCH7690CB | CXCH7690C XXXXXX | RSET=2.61KΩ | ESOP8 | Specific current demand applications |
| CXCH7690MCA | CXCH7690MC XXXXXX | RSET=2.2KΩ | EMSOP8 | Compact Space Design |
| CXCH7690MCB | CXCH7690MC XXXXXX | RSET=2.61KΩ | EMSOP8 | Specific current requirements for compact spaces |
Design considerations
• Input/output capacitorRecommend using output capacitors of 1-10 μ F to ensure system stability
• PCB layoutThe power path should be as short and wide as possible to reduce the influence of parasitic parameters
• thermal designFully utilize PCB copper foil to provide a good heat dissipation path for chips
• ESD protectionThe chip is equipped with± 2000V HBM ESD protection, but additional protection is recommended for sensitive environments
Market Competitiveness Analysis
The CXCH7690 series has significant advantages in the USB charging control chip market:
• high integrationReduce the number of peripheral components, lower system costs and PCB area
• Accurate control：± Leading similar products with 8% current limiting accuracy
• Fast dynamic responseA short circuit response time of 2us ensures system safety
• Good compatibilityFully support mainstream charging protocols in the market
• Flexible configurabilityAdjust the current limit value through external resistors to meet different application requirements
Encapsulation information and supply guarantee
Encapsulation options
• ESOP-8 packagingStandard size, with good heat dissipation performance and welding process adaptability
• EMSOP-8 encapsulationCompact size, suitable for applications with limited space
Quality and reliability
• Working temperature range-40 ℃ to 85 ℃, suitable for harsh environmental requirements
• ESD protection level：± 2000V HBM， Ensure the reliability of production and use
• Strict testing standardsEach chip undergoes comprehensive testing to ensure factory quality
About JTM-IC Jiataimu
JTM-IC focuses on the research and sales of power management chips and interface chips, and has deep technical accumulation and rich market experience in the field of USB charging control. The company's products are known for their high reliability, high performance, and excellent cost-effectiveness, and have been widely used in various consumer electronics products and industrial equipment.
Through continuous technological innovation and a comprehensive service system, JTM-IC has established long-term and stable cooperative relationships with numerous well-known customers. The company adheres to customer demand orientation and provides competitive products and high-quality technical support services to customers.
For more technical information, reference designs, and sample application information about the CXCH7690 series products, please visit the official website:http://www.jtm-ic.com
