In the field of industrial power supply and LED driver, the demand for constant voltage and constant current (CV/CC) controller with high integration and low power consumption is increasing. CXSD62670 with Integrated 600V MOSFET, ± 4% Accuracy Output and Standby PowerThe 150mW feature provides an efficient solution for auxiliary power supply, control system and non-isolated LED driver, greatly reducing system cost and volume.
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[ CXSD62670 ]"
Introduction
In the field of industrial power supply and LED driver, the demand for constant voltage and constant current (CV/CC) controller with high integration and low power consumption is increasing.CXSD62670With the characteristics of integrated 600V MOSFET, 4% accuracy output and standby power consumption <150mW, it provides efficient solutions for auxiliary power supply, control system and non-isolated LED driver, greatly reducing system cost and volume.
1. core features: high integration and precise control
1. "Three high" performance advantages
a. High withstand voltageIntegrated 600V power MOS tube, support 20-600V wide voltage input, adapt to industrial power environment.
B. High precision: Constant voltage/constant current accuracy ± 4%, built-in line voltage/load compensation technology to ensure output stability.
c. High energy efficiency: Standby power consumption <150mW, support PWM/PFM multi-mode switching, optimize light load efficiency.
2. Innovative Architecture to Simplify Design
a. Uncompensated capacitor design: Unique control technology eliminates the need for loop compensation capacitance and reduces PCB area by more than 30%.
B. Fully integrated protectionCycle-by-cycle current limit, output short circuit/open circuit protection, VDD undervoltage/overvoltage protection (see the table below for thresholds) to improve system reliability.
| Protection function | trigger condition |
|---|---|
| VDD Undervoltage Lockout | 8-10V (on) & rarr;15-17.5V (off) |
| Output short circuit protection | > 510mV current signal detected on CS pin |
| Power tube overcurrent protection | Cycle-by-cycle current limit (threshold 500mV ± 2%) |
2. Technology Analysis: Intelligent Control and Industrial Intensification
1. Key Pin Functions
a.FB (pin 3): Voltage feedback terminal, connected to a resistor voltage divider network to adjust the output voltage (internal reference voltage 2.0V ± 1.5%).
B. CS (pin 4): Current detection terminal, set constant current value through external resistor (formula:I_out = V_cs / R_cs）。
c.VIN (pins 5-6): The high-voltage input terminal is directly connected to the internal MOS drain to simplify wiring.
2. dynamic response optimization
a.PWM/PFM automatic switching：
I.Overload Mode: Fixed frequency PWM control to ensure high current stability.
II.Light load mode: Switch PFM modulation to reduce switching losses and maintain high efficiency.
B. Constant current compensation technology: Automatically compensate for input voltage fluctuations and load changes to avoid output current drift.
3. typical application scenarios
1. industrial control system
A. suitable for PLC, industrial computer auxiliary power supply (12V/24V output), withstand grid fluctuations and harsh environment.
B. Reference design(Figure 6-1):
I.Input: HVDC (rectified by D1)
II.Key devices: SS14 freewheeling diode (D3), 1 μF/450V input capacitor (C2), 3kΩ start-up resistor (R3)
III. Output: 12V regulated (via FB pin resistor network regulation)
2. Non-isolated LED driver
I. Support constant current output drive LED string to avoid brightness fluctuation (constant current accuracy ± 4%).
II. With linear or switch architecture, it is suitable for downlights, industrial and mining lamps and other scenes.
3. Auxiliary power supply for telecommunication equipment: 48V communication power supply to 5V/12V, standby power consumption <150mW, in line with green communication standards.
4. electrical characteristics and reliability
1. Industrial Temperature Adaptability
a. Operating temperature:-40 ℃ ~ 125 ℃, suitable for high temperature cabinet and low temperature outdoor environment.
B. Temperature characteristics(See Fig. 7-1~7-4):
I. VDD turn-on voltage (Vdd_on) rises to 17.5V at high temperature to avoid false trigger protection.
II. The current limit threshold (Vcs_max) is maintained in the full temperature range of 490-510mV to ensure over-current protection consistency.
2. Power Performance
| Parameters | Typical value | Condition |
|---|---|---|
| Internal MOS on-resistance | 3.8Ω | VDS=600V |
| Working current | 1.5mA | VDD=20V, FB=3V |
| Starting current | 15μA | Very low standby loss |
5. packaging and design advantages
a. Encapsulation: SOP7 (size 4.8 × 6.2mm), pin spacing 1.27mm, support automatic patch.
B. Cost optimization：
I. Eliminate external MOS tube (600V withstand voltage) and compensation capacitor, BOM cost is reduced by 20%.
II. Simplify PCB layout, double-sided design can achieve high-density wiring.
Conclusion
CXSD62670"Integrated MOS Uncompensated Capacitor Industrial Protection"For the core competitiveness, redefine the non-isolated power supply design standards. Its small size and low standby power consumption are particularly suitable for space-constrained industrial control, LED lighting and telecommunications equipment, helping developers balance performance, cost and reliability requirements.
Technical Specification (Product PDF)Design Resources: SOP7 package size, 12V output reference circuit and temperature characteristic curve are detailed in the technical document.
Need detailed PDF specifications, please contact us, you can also get free samples and technical support!
Product packaging diagram
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| Model | VCC starting voltage | VCC Shutdown Voltage | Input voltage range | Starting current | Switching frequency | Output voltage accuracy | Built-in power tube | Features | Encapsulation |
| CXDC65167 | 6.5V | 3.5V | 20-60V | Built-in Quick Start | 10-100K, peripheral can be set | 3% | There are | 48V battery-powered system step-down switching power supply chip | ESOP8 |
| CXAC85204 | 16V | 9V | 20-150V | 3uA | jitter frequency | 1.5% | There are | Non-isolated system constant voltage constant current output | SOP7 |
| CXAC85207 | 9.5V | 7.8V | 10-25V | 80uA | 0-300K, peripheral adjustable | 1.50% | None | programmable power chip | SOP16 |
| CXLB73135 | 9.5V | 7.8V | 10-25V | 80uA | 0-300K, peripheral adjustable | 1.50% | None | programmable power chip | SSOP24 |
| CXDC65168 | 6.5V | 3.5V | 10-600V | 200uA | 0-300K, peripheral can be set | 1.5% | None | Synchronous Rectification, HighEfficiencycan support the battery constant current constant voltage charging | SOP16 |
| CXSU63303 | - | - | 7-150V | External auxiliary power supply | 70K | 1.5% | None | The buck-boost control chip supports high-voltage and high-current protection solutions. | QFN32 |
| CXSU63304 | - | - | 13-90V | External auxiliary power supply | 100K | 1.5% | None | Buck-Boost Digital Power Chip Supporting PD3.0 Protocol | QFN64 |
| CXSU63305 | 3.65V | 3.6V | 4-600V | 50uA | 0-300K, peripheral can be set | 1.5% | None | Step-up synchronous rectification scheme to support high-voltage high-current scheme | SOP16 |
| CXSD62669 | 16V | 9V | 20-90V | 3uA | jitter frequency | 1.5% | There are | Non-isolated system constant voltage constant current output | SOP7 |
| CXSD62670 | 16V | 9V | 20-600V | 3uA | jitter frequency | 1.5% | There are | Non-isolated system constant voltage constant current output | SOP7 |
| CXSD62671 | - | - | 10-115V | Built-in Quick Start | 140KHz | 3% | None | Short circuit hiccup, flexible and adjustable output voltage | ESOP8 |
| CXSD62672 | - | - | 10-115V | Built-in Quick Start | 120KHz | 3% | None | Short circuit lock, flexible output voltage adjustable | ESOP8 |
| CXSD62673 | - | - | 10-100V | Built-in Quick Start | 120KHz | 3% | There are | Zero power consumption enable, flexible and adjustable output voltage | ESOP8 |
| CXSD62674 | - | - | 10-120V | Built-in Quick Start | 120KHz | 3% | There are | Zero power consumption enable, flexible and adjustable output voltage | ESOP8 |
| CXSD62675 | - | - | 10-120V | Built-in Quick Start | 120KHz | 3% | There are | Short circuit hiccup, flexible and adjustable output voltage | ESOP8 |
| CXSD62676 | - | - | 10-120V | Built-in Quick Start | 120KHz | 3% | None | Short circuit hiccup, flexible and adjustable output voltage | ESOP8 |
| CXSD62677 | - | - | 10-120V | Built-in Quick Start | 70KHz | 3% | None | Short circuit lock, flexible output voltage adjustable | ESOP8 |
| CXSD62678 | 4.6V | 3.8V | 4-600V | 50uA | 0-300K, peripheral can be set | 1.5% | None | Step-down synchronous rectification scheme to support high voltage and high current scheme | SOP16 |
| CXSD62679 | 16.5V | 8V | 10-600V | 200uA | 0-300K, peripheral can be set | 1.5% | None | Synchronous Rectification, HighEfficiencycan support the battery constant current constant voltage charging | SOP16 |
| CXSD62680 | 8.5V | 7.5V | 10-600V | 200uA | 0-300K, peripheral can be set | 1.5% | None | Synchronous Rectification, HighEfficiencycan support the battery constant current constant voltage charging | SOP16 |
| CXSD62681 | 9.5V | 7.8V | 11-250V | 200uA | 0-300K, peripheral can be set | 1.5% | None | Synchronous Rectification, HighEfficiency, short circuit lock, built-in temperature protection, etc. | SSOP16 |
| CXSD62682 | 9.5V | 7.8V | 11-100V | 200uA | 0-300K, peripheral can be set | 1.5% | There are | Synchronous Rectification, HighEfficiency, short circuit lock, built-in temperature protection, etc. | QFN32 |
| CXSD62683 | 9.5V | 7.8V | 11-30V | 200uA | 0-300K, peripheral can be set | 1.5% | There are | Synchronous Rectification, HighEfficiency, short circuit lock, built-in temperature protection, etc. | QFN32 |
| CXSD62684 | - | - | - | External auxiliary power supply | Maximum operating frequency 100KHz | - | None | Digital Algorithm Current Mode Synchronous Buck Control Chip | SSOP24 |
| CXSD62685 | 9.5V | 7.8V | 10-25V | 80uA | 0-300K, peripheral adjustable | 1.50% | None | Synchronous Rectifier Buck Power Supply Control Chip | SSOP16 |
