In modern electronic equipment, efficient and stable power management scheme is the core requirement. As a highly integrated dual linear power supply chip, CXLD64408 has become an ideal choice for electric vehicle controllers, consumer electronics and other fields with its 12V/5V dual output, built-in power triode driver and multiple protection mechanisms. This article will analyze its technical characteristics, application scenarios and design advantages in depth.
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[ CXLD64408 ]"
CXLD64408: highly integrated dual linear power chip innovation design
In modern electronic equipment, efficient and stable power management scheme is the core requirement.CXLD64408As a highly integrated dual linear power supply chip, with its12V/5V Dual Output,Built-in power triode driverandMultiple protection mechanismsIt has become an ideal choice for electric vehicle controllers, consumer electronics and other fields. This article will analyze its technical characteristics, application scenarios and design advantages in depth.
1. core features and functions
CXLD64408 adoptionESOP8 Package, integrates two core modules:
1. Dual linear power output
a.5V output (VO1): Maximum current 100mA, accuracy 3%(4.85V-5.15V).
B .12V output (VO2): Maximum current 100mA, accuracy ± 2.5%(11.7V-12.3V).
c. Low noise and high stability: Output noise voltage as low as 40 μV(5V) and 100 μV(12V), ripple rejection ratio up to 50dB(120Hz).
d. Temperature adaptability: temperature drift coefficient is only 0.15mV/℃(5V) and 0.40mV/℃(12V), suitable for -45 ℃ to 125 ℃ environment.
2. Power and protection triode
a. Power triode (Bin/CO): It can directly drive the buzzer and relay, and the saturation voltage is reduced to 1.5V(Ic = 80mA).
B. Overcurrent protection triode (IO/IS): Detect current through external resistor (Rsen) to realize short-circuit current limiting protection.
Deep Analysis of 2. Electrical Performance
At VIN = 24V (typical application):
| Parameters | 5V output | 12V output |
|---|---|---|
| Load adjustment rate | ≤ 60mV | ≤ 60mV |
| Voltage regulation rate | ≤ 60mV | ≤ 100mV |
| Minimum differential pressure | 1.7V | 1.7V |
| Quiescent current | Typical 4.5mA (full circuit) |
Key Design Tips: The input voltage (VIN) must be ≥ 14V(12V output) or ≥ 8V(5V output), and must not exceed 36V, otherwise the chip may be damaged.
3. Typical Application Circuit Design
1. Power input: VIN is connected to 24V DC source, C1 and C2 are input filter capacitors (1μF is recommended).
2. Dual output：
a.VO1(5V) for the MCU power supply, C4 for the output filter capacitor.
B. VO2(12V) drive sensor or peripheral.
3. Power triode driver: Bin pin is connected to MCU PWM signal, CO drives buzzer/relay.
4. Overcurrent protection: IS pin samples current through detection resistor (Rsen), IO feedback to MCU trigger protection.
4. four application scenarios
2. Twister/balance car:Dual power supply simplifies PCB layout and overcurrent protection enhances safety.
3. Industrial linear regulator:High ripple rejection ratio (50dB) for noise-sensitive devices (such as sound cards, ADC modules).
4. Computer motherboard auxiliary power supply:Provide stable low-voltage power supply for BIOS chip and fan interface.
Summary of 5. design advantages
1. High degree of integration: Dual power supply + dual triode, reducing peripheral components by more than 30%.
2. Strong anti-interference ability: 50dB ripple rejection ratio, suitable for inverter environment.
3. Complete protectionTemperature protection, short circuit current limiting, ESD protection (2kV HBM).
4. MiniaturizationESOP8 package (3.9mm × 4.9mm) for compact devices.
Conclusion
CXLD64408 throughTwo-way precision voltage stabilizationwithIntelligent driver integrationThe complexity of multi-voltage system design is solved. Its ability to operate stably in a wide temperature range of -45 ℃ to 125 ℃ is especially suitable for harsh environments such as new energy vehicles and intelligent hardware. Engineers can quickly deploy with typical application circuits (Figure 6-1), significantly reducing development cycles and increasing system reliability.
Technical Specification (Product PDF)Data Book Index：[CXLD64408.pdf]
Package specification: ESOP8 (pin pitch 1.27mm)
Limit parameters: VIN≤ 36V; welding temperature ≤ 300 ℃(10s); storage temperature -55 ℃ ~ 150 ℃
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Product packaging diagram
Related Chip Selection GuideMore similar products.....
| Model | Operating voltage | Quiescent current | Maximum output current | Features | Encapsulation |
| CXLD64406 | 8-36V | 4.5mA | 100mA | Dual linear power supply output 5V, 3.3V, integrated overcurrent protection triode, power triode | ESOP8 |
| CXLD64407 | 8-36V | 4.5mA | 100mA | Dual linear power output 12V, 3.3V, integrated over-current protection triode, power triode | ESOP8 |
| CXLD64408 | 8-36V | 4.5mA | 100mA | Dual linear power output 12V, 5V, integrated overcurrent protection triode, power triode | ESOP8 |
| CXLD78L05A | 8-36V | 3.4mA | 100mA | Linear power supply output 5V | SOT-89/TO-92 |
| CXLD78L12 | 14-36V | 3.4mA | 100mA | Linear power output 12V | SOT-89/TO-92 |
