With the rapid development of fast charging technology, power management chips that support high power and multiple protocols have become a core requirement for electronic devices. CXSU63304 is a digital power chip that integrates a synchronous four switch buck boost controller and USB PD3.0 protocol. With its 100W output capability, 13-90V wide voltage input, and multiple safety protections, it provides high-performance solutions for mobile power banks, car chargers, power tools, and other devices.
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[ CXSU63304 ]"
Introduction
With the rapid development of fast charging technology, power management chips that support high power and multiple protocols have become a core requirement for electronic devices.CXSU63304As a digital power chip that integrates a synchronous four switch buck boost controller and USB PD3.0 protocol, it provides high-performance solutions for mobile power banks, car chargers, power tools, and other devices with 100W output capability, 13-90V wide voltage input, and multiple safety protections.
1、 Core feature: Efficient and flexible fast charging engine
1. PD3.0 protocol fully compatible
b. Automatically identify E-Mark cables, dynamically broadcast 3A/5A current capability, ensuring safe matching of wires with 100W output.
c. Built in USB Type-C interface logic and BMC communication module, simplifying the design of Source devices.
2. Four switch voltage boosting architecture
b. Intelligent voltage regulation3.3V-21V output range, supports CC/CV mode and line loss compensation, with a conversion efficiency of up to 94.5%.
c. Seamless switchingStable operation can be achieved when the input voltage is higher, lower, or equal to the output voltage.
3. Six fold safety protection
c. Integrated MOSFET driver locking function to eliminate the risk of direct connection between upper and lower transistors.
| protection type | trigger threshold | Recovery threshold |
|---|---|---|
| Input undervoltage protection | 0.40V | 0.43V |
| Input Overvoltage Protection | 2.94V | 2.78V |
| over-temperature protection | 90℃ | 80℃ |
2、 Technical advantages: precise control and easy-to-use design
1. Intelligent management of power switch
a. Voltage reduction mode(VIN>VOUT): MOS transistors Q3/Q4 are fixed on, while Q1/Q2 are controlled by PWM.
b. Boost mode(VOUT>VIN): Q1/Q2 are fixed on, Q3/Q4 are controlled by PWM.
c. The four tube synchronous freewheeling topology significantly reduces power consumption and improves efficiency.
2. Constant current and overcurrent protection
a. The current sampling is amplified 21.4 times by a differential operational amplifier and input into an ADC to achieve precise constant current control (formula:V=0.94+0.107*I）.
b. The overcurrent protection threshold is 10A, which quickly cuts off the output to ensure safety.
3. Dynamic configuration of power supply capacity; passHRPPin calibration pull-up resistor, flexible power switching capability:
a.36kΩDefault USB power supply
b.12kΩ: 1.5A capability
c.4.7kΩ3A capability
4. VCONN intelligent allocation Automatically detect CC1/CC2 channels and drive external MOS transistors to provide VCONN power for E-Mark cables.
3、 Typical application scenarios CXSU63304 is widely applicable to Source devices that require high reliability power supply:
1. Portable devicesMobile power bank, fast charging head for mobile phones/tablets.
2. In car systemCar charger (compatible with 12V/24V/48V batteries).
3. Power toolsLithium battery electric tools, garden equipment.
4. Industrial equipmentPower supply module for small household appliances and IoT devices.
Design ReferenceFigure 6-1 provides a typical circuit for converting 13-90V input to 20V/5A output, integrating voltage feedback (VFB-VIN), current detection (IFB-VBUS), and temperature monitoring (TFB).
4、 Packaging and Electrical Parameters
1. PackagingLQFP64 (size 12×); 12mm）， Supports industrial grade temperatures (-40 ℃~105 ℃).
2. Electrical characteristics：
a. Driver power supply VDD12:10-18V (static current 1mA)
b. Chip power supply VDD3/VDDA: 3.3V± 10% (static current 5mA)
c. PWM frequency: 100kHz
Five Application Design
1 Power switch control
Figure 8-1 shows how to connect four power switches to the inductor, VIN, VOUT, and; Simplified schematic diagram of GND. According to CXSU63304; VIN and
The size of VOUT and the load size automatically operate in buck mode or boost mode. The complementary PWM of the upper and lower tubes achieves synchronous freewheeling.
When VIN higher than; When VOUT, the chip operates in buck mode. During voltage reduction, MOS transistor; Q3 and; MOS transistor; Q4 fixed output; MOS transistor; Q2，Q1
The duty cycle is controlled by the voltage current loop. When VOUT is higher than; At VIN, the chip operates in boost mode. When boosting, MOS transistor; Q1 and; MOS transistor; Q2
Fixed output; The duty cycle of MOS transistors Q4 and Q3 is controlled by the voltage current loop.
The principle of constant current output and the circuit structure diagram are shown in Figure 8-2:
Step 1: Calculate the DC offset:
Step 2: Calculate the amplification factor of the operational amplifier: A=(R35)//R34)/R44
Step 3: Calculate the output voltage:
From the above formula, it can be concluded that the amplification factor of the operational amplifier is; 21.4 times. When passing through the sampling resistor; The current on RS is; At 1A, sampling resistor
The voltage difference between the two ends is 5mV. After being amplified by a differential operational amplifier 21.4 times, it is input to the internal ADC pin of CXSU63304, with a voltage amplitude of
Offset+Vout=0.94V+0.107V=1.047V， Then, after calculating the internal circuit error, adjust the PWM to control the current output.
Output overcurrent protection principle, circuit structure as shown in the diagram; As shown in 8-2:
According to the formula in the principle of constant current output; 1. Formula 2. It can be seen that the relationship between output current and voltage is: V=0.94+0.107 * I (formula ); 3）
When the voltage at pin 6 of CXAR41214 is greater than that at pin A voltage of 5 triggers overcurrent protection. The overcurrent protection threshold is about 10A.
3 Input voltage feedback
CXSU63304 has an input voltage detection and control unit that detects overvoltage and undervoltage of the input voltage. The input undervoltage threshold is 0.40V;
The input undervoltage recovery threshold is 0.43V. The input overvoltage threshold is 2.94V; the input overvoltage recovery threshold is 2.78V.
When the input voltage is lower than; 13V， Trigger input undervoltage protection to turn off; VBUS voltage output, when the input voltage returns to; Above 14V, restore
Complex VBUS+5V voltage output.
When the input voltage is higher than 95V, the input overvoltage protection is triggered, thereby turning off; VBUS voltage output, when the input voltage returns to; When the voltage is below 90V,
Restore VBUS+5V voltage output.
4 temperature feedback
CXSU63304 supports over temperature protection. The threshold for over temperature protection is 90 ℃. Overtemperature recovery threshold; 80 ℃. When the ambient temperature of the PCB exceeds; 90 ℃, triggered
Over temperature protection, thus turning off; VBUS voltage output. When the ambient temperature drops to; Below 80 ℃, exit over temperature protection and restore; VBUS+5V voltage output.
5 Power Capability Selection
CXSU63304 through pins; HRP is used to calibrate the pull-up resistor. Different pull-up resistors represent different power supply capabilities.
Table 8-1 Power supply capability
6 VCONN control
CXSU63304 automatically selects when detecting device or E-Mark cable connection; CC1 or CC2 are used as data communication pins. When CC1 as
When it comes to data communication pins, pins; ENCC2 will output a low level to drive the external device; MOS transistor output; VCONN power supply. When CC2 as a data communication
When it comes to pins, pins ENCC1 will output a low level to drive the external MOS transistor to output VCONN power.
Conclusion
CXSU63304Full protocol fast charging support, wide voltage rise and fall control, multiple protection mechanismsTo enhance core competitiveness and assist developers in quickly implementing high-performance Type-C power solutions. Its digital architecture (supporting UART/SWCLK upgrade interfaces) further simplifies the debugging process and is suitable for consumer electronics, industrial equipment, and emerging energy storage fields.
Technical Specifications (Product PDF);Resource DownloadPackage size (LQFP64), typical application circuits, and pin definitions are detailed in the technical documentation.
For detailed PDF specifications, please contact us. You can also receive free samples and technical support！
Product packaging diagram;
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