With the rapid development of fast charging technology, supporting high-power and multi-protocol power management chips has become the core requirement of electronic equipment. CXSU63304, as a digital power chip integrating synchronous four-switch step-up and step-down controller and USB PD3.0 protocol, relies on 100W output capability, 13-90V wide voltage input and multiple safety protection to provide mobile power supply, car charger, power tools and other equipment provide high-performance solutions.
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[ CXSU63304 ]"
Introduction
With the rapid development of fast charging technology, supporting high-power and multi-protocol power management chips has become the core requirement of electronic equipment.CXSU63304As a digital power chip integrated with synchronous four-switch step-up and step-down controller and USB PD3.0 protocol, with 100W output capability, 13-90V wide voltage input and multiple safety protection, it is a mobile power supply, car charger, power tools and other equipment provide high-performance solutions.
I. Core features: efficient and flexible fast charging engine
1.PD3.0 Protocol fully compatible
B. Automatically identify E-Mark cables and dynamically broadcast 3A/5A current capability to ensure the wire matches 100W output safely.
c. Built-in USB Type-C interface logic and BMC communication module simplify the design of Source devices.
2.Four-switch buck-boost architecture
B. Intelligent Voltage regulation: 3.3 V-21V output range, support CC/CV mode and line loss compensation, conversion efficiency up to 94.5%.
c. Seamless switching: When the input voltage is higher than, lower than or equal to the output voltage, it can work stably.
3.Six-weight security protection
c. Integrate the MOSFETs drive locking function to eliminate the risk of upper and lower tube straight-through.
| 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℃ |
II. Technical advantages: precise control and easy-to-use design
1.Intelligent management of power switch
a. Step-down mode(VIN > VOUT):MOS tube Q3/Q4 fixed conduction, Q1/Q2 is regulated by PWM.
B. Boost mode(VOUT > VIN):Q1/Q2 fixed conduction, Q3/Q4 is regulated by PWM.
c. Four-tube synchronous freewheeling topology greatly reduces power consumption and improves efficiency.
2.Constant current and overcurrent protection
a. Current sampling is amplified 21.4 times by differential operational amplifier and then input ADC to realize accurate constant current control (formula:V=0.94 0.107* I).
B. The overcurrent protection threshold is 10, and the output is quickly cut off to ensure safety.
3.Dynamic configuration of power supply capabilityPassHRPPin calibration pull-up resistor, flexible switching power supply capability:
A.36kohm: default USB power supply
B .12kohm: 1.5A capability
C.4.7kohm: 3A capability
4.VCONN intelligent allocationAutomatically detects the CC1/CC2 channel and drives the external MOS tube to provide VCONN power for the E-Mark cable.
3. Typical application scenariosCXSU63304 is widely applicable to Source devices requiring high reliability of power supply:
1. Portable equipment: mobile power supply, mobile phone/tablet fast charging head.
2. Vehicle-mounted system: Car Charger (suitable for 12V/24V/48V battery).
3. Power tools: lithium battery electric tools, garden equipment.
4. Industrial equipment: Power supply module for small household appliances and IoT devices.
Design Reference: Figure 6-1 provides a typical circuit for 13-90V input to 20V/5A output, integrating voltage feedback (VFB_VIN), current detection (IFB_VBUS) and temperature monitoring (TFB).
IV. Packaging and electrical parameters
1. Encapsulation: LQFP64 (size 12 × 12mm), support industrial grade temperature (-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
V. Application Design
1 Power Switch Control
Figure 8-1 shows a simplified schematic diagram of how to connect four power switches to inductance, VIN, VOUT and GND. CXSU63304 according to VIN and
The VOUT size and load size automatically work in Buck mode or boost mode. Upper and Lower Tube PWM complementary to achieve synchronous freewheeling.
When VIN is higher than VOUT, the chip operates in Buck mode. When the voltage is reduced, the MOS tube Q3 and MOS tube Q4 are fixed output; MOS tube Q2,Q1
The duty cycle is controlled by the voltage and current loop. When VOUT is higher than VIN, the chip operates in boost mode. When boosting, MOS tube Q1 and MOS tube Q2
Fixed output; The duty cycle of MOS tube Q4 and Q3 is controlled by voltage and current loop.
The principle of constant current output and circuit structure diagram are shown in Figure 8-2:
Step 1: calculate the DC offset:
Step 2: calculate the amplifier magnification: A =(R35//R34)/R44
Step 3: calculate the output voltage:
From the above formula, the amplification factor of the operational amplifier is 21.4 times. When the current flowing through the sampling resistor RS is 1A, the sampling resistor
The voltage difference between the two ends is 5mV. After 21.4 times of amplification by differential operational amplifier, it is input to the internal ADC pin of CXSU63304, and its voltage amplitude is
Offset Vout = 0.94V 0.107V = 1.047V, and then adjust PWM after internal circuit error calculation to control current output.
The output overcurrent protection principle and circuit structure are shown in Figure 8-2:
According to Formula 1 and Formula 2 in the principle of constant current output, we can see that the relationship between output current and voltage is: V = 0.94 0.107 * I (Formula 3)
When the voltage of pin 6 of CXAR41214 is greater than that of pin 5, overcurrent protection is triggered. The overcurrent protection threshold is about 10.
3 input voltage feedback
CXSU63304 has an input voltage detection control unit to detect the overvoltage and undervoltage of the input voltage. The input undervoltage threshold is 0.40V;
Enter an undervoltage recovery threshold of 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, the input undervoltage protection is triggered, thus turning off the VBUS voltage output.
Complex VBUS 5V voltage output.
When the input voltage is higher than 95V, the input overvoltage protection is triggered to turn off the VBUS voltage output. When the input voltage returns to below 90V,
Restore the VBUS 5V voltage output.
4 temperature feedback
CXSU63304 supports over-temperature protection. The over-temperature protection threshold is 90℃. Over-temperature recovery threshold 80℃. When PCB ambient temperature exceeds 90℃, trigger
Over-temperature protection to turn off VBUS voltage output. When the ambient temperature drops below 80℃, exit the over-temperature protection and restore the VBUS 5V voltage output.
5 power capability selection
CXSU63304 use the HRP pin to calibrate the pull-up resistor. Different pull-up resistances represent different power supply capabilities.
Table 8-1. Power supply capacity
6 VCONN control
CXSU63304 when the device or E-Mark cable is connected, CC1 or CC2 is automatically selected as the data communication pin. When CC1 is used
When the data communication pin is used, pin ENCC2 outputs a low level to drive the external MOS tube to output VCONN power supply. When CC2 is used as data communication
Pin ENCC1 outputs a low level to drive the external MOS tube to output VCONN power.
Conclusion
CXSU63304Full-protocol fast charging support, wide-voltage step-down control, and multiple protection mechanismsAs the core competitiveness, it helps developers quickly realize high-performance Type-C power supply solutions. Its digital architecture (supporting UART/SWCLK upgrade interface) further simplifies the debugging process and is suitable for consumer electronics, industrial equipment and emerging energy storage fields.
Technical Specification (product PDF)Resource download: see the technical documentation for package size (LQFP64), typical application circuit, and pin definition.
For detailed PDF specifications, please contact us. You can also get free samples and technical support.!
Product packaging diagram
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